CN115075510A - One-step forming ground and bin jumping method construction method of ultra-flat wear-resistant cast-in-place concrete - Google Patents
One-step forming ground and bin jumping method construction method of ultra-flat wear-resistant cast-in-place concrete Download PDFInfo
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- CN115075510A CN115075510A CN202210783186.7A CN202210783186A CN115075510A CN 115075510 A CN115075510 A CN 115075510A CN 202210783186 A CN202210783186 A CN 202210783186A CN 115075510 A CN115075510 A CN 115075510A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
- E04F15/14—Construction of joints, e.g. dividing strips
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The construction method of the ultra-flat wear-resistant cast-in-place concrete one-step forming ground and the warehouse jumping method divides the same floor to be poured into 6 construction blocks, the 6 construction blocks are poured in sequence according to the dividing serial numbers of A, B, C, D, E and F according to the warehouse jumping method, and the construction blocks sequentially comprise the following construction steps: step 1.1 preparation before construction; step 1.2, pouring base layer concrete; step 1.3, spreading carborundum mixture for the first time, and trowelling and polishing; step 1.4, spreading carborundum mixture for the second time, and trowelling and polishing; step 1.5, extracting slurry; step 1.6, light collection; step 1.7, concrete surface layer curing; step 1.8, sealing, curing and polishing the carborundum terrace; step 1.9, maintenance and finished product protection, compared with the traditional concrete ground, the invention ensures that the maximum deviation of the formed ground is 4mm within 2m, the whole formed ground is smooth, and the abrasion resistance of the formed ground is also ensured.
Description
Technical Field
The invention relates to the technical field of factory building construction, in particular to a construction method for one-step forming of ultra-flat wear-resistant cast-in-place concrete and a skip method.
Background
The carborundum wear-resistant hardened ground is commonly called a carborundum wear-resistant terrace. Since the 70 s of the last century appeared, the wear-resistant floor is rapidly popularized in Europe and America, becomes a perfect generation-replacing product of terrazzo ground, and is the first choice in developed countries after the 80 s.
The carborundum enhances the wear resistance and the impact resistance of the concrete ground. Greatly improves the density of the concrete, reduces dust, increases the oil resistance of the ground, and forms a high-density, easy-to-clean and anti-seepage ground. The construction is carried out together with the concrete ground, and the construction period is short. The durability is good, and the cost caused by periodic coating or surface thickening is reduced. It has less dust generation than non-metal hardened ground, flashing appearance like night, better impact resistance and certain antistatic effect.
At present, most of the floors of plants adopt emery one-step molding floors or polyurethane mortar floors, and the emery one-step molding floors have extremely high requirements on the structural profile.
For example, the application number is CN201810917475.5, the name is a construction method for controlling concrete cracks by combining a skip method and an expansion reinforcing band, aiming at the construction of a post-cast strip of a basement with an ultra-large area, the skip method is adopted for interval construction, meanwhile, an expansion concrete reinforcing band with the concrete strength grade higher than that of common concrete by one level is arranged between two adjacent bins, and an expansion agent is doped into the expansion concrete reinforcing band. The construction method combining the skip method and the concrete reinforcing band is adopted, post-cast band operation is avoided, a large number of procedures such as picking and chiseling on the pages of the concrete post-cast band, cleaning garbage, supporting the post-cast band and the like are reduced, and the structure is favorable for resisting temperature difference cracks.
The above patent has solved the poor crack of ground temperature resistance, but can not solve the problem of wear-resisting, roughness, the hollowing of ground and ground sanding, skinning or pitted surface on factory building ground.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a construction method for once forming ground and a skip method of ultra-flat wear-resistant cast-in-place concrete, wherein a concrete post-casting reinforcing band is cancelled, an expansion reinforcing band is poured among construction blocks to reduce ground cracking and ensure ground flatness; meanwhile, the construction is carried out by matching with a skip method, so that the ground of the factory building is wear-resistant, and the problems of hollowing, sanding, peeling or pitted surface of the ground are avoided.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the one-step forming ground of the ultra-flat wear-resistant cast-in-place concrete comprises a plurality of construction blocks, wherein the construction blocks are positioned on the same floor, 6 construction blocks are in a group, and expansion reinforcing belts are arranged at the junctions of the construction blocks; the construction block comprises a reinforced concrete floor slab at the bottom, a carborundum wear-resistant layer at the upper end of the reinforced concrete floor slab and a curing agent at the upper end of the carborundum wear-resistant layer, and the reinforced concrete floor slab consists of plate surface steel bars and concrete; and adjacent plates are formed on the side surfaces of the construction blocks and are positioned on two sides of the expansion reinforcing belt, a steel wire mesh is arranged between the adjacent plates and the expansion reinforcing belt, and the upper opening elastic line chiseling depth of the adjacent plates is greater than or equal to 100 mm.
The construction method of the ground skip method by one-step molding of the ultra-flat wear-resistant cast-in-place concrete comprises the following steps:
step 1: dividing the same floor to be poured into 6 construction blocks, sequentially pouring the 6 construction blocks according to the partition numbering sequence of A, B, C, D, E and F according to a skip method, wherein the pouring interval construction progress among the construction blocks is 7-15 days, and an expansion reinforcing band is arranged at the junction of the construction blocks;
step 2: the limited expansion rate of the micro-expansion agent doped in the concrete in the expansion reinforcing band range is more than or equal to 0.050 percent; the limited expansion rate of the micro-expanding agent doped in the concrete outside the range of the expansion reinforcing band is more than or equal to 0.040 percent, and the strength grade of the expansion reinforcing band concrete is higher than that of the concrete on the two sides of the expansion reinforcing band by one grade;
and step 3: the construction sequence of the expansion reinforcing belt follows the adjacent plates, when the expansion reinforcing belt is poured, the steel wire meshes on the construction joints of the adjacent plates of the adjacent poured construction blocks are removed, and then concrete is poured in the expansion reinforcing belt;
the construction block in the step 1 sequentially comprises the following construction steps: step 1.1 preparation before construction; step 1.2, pouring base layer concrete; step 1.3, spreading carborundum mixture for the first time, and trowelling and polishing; step 1.4, spreading carborundum mixture for the second time, and trowelling and polishing; step 1.5, extracting pulp; step 1.6, light collection; step 1.7, concrete surface layer curing; step 1.8, sealing, curing and polishing the carborundum terrace; and 1.9, maintaining and protecting finished products.
The method is a preferable scheme and comprises the following steps that 1.1, preparation before construction is carried out, a laser emitter is arranged outside a construction block, and the elevation of the surface of a reinforced concrete floor slab to be poured in each construction block is arranged at the same elevation point through the laser emitter; before concrete pouring, trial walking is carried out on the plate surface reinforcing steel bars through a leveling machine, and whether the plate surface reinforcing steel bars have large deformation and warping or not is checked.
The method is a preferable scheme of the invention, and comprises the following steps of 1.2, pouring concrete on a base layer, after the steel bars on the surface of the base layer are determined to be flat, sprinkling water on the base through the steel bars on the surface of the base layer to enable the base layer to be in a wet state, pouring concrete, and filling and vibrating the concrete material when the local concrete does not reach the elevation; and (3) beating the columns, edges, corners and other parts bundled by the steel bars on the slab surface by using a wood trowel, floating cement paste out of the slab surface with the elevation of at least 3mm after the concrete is strickled off, removing bleeding water by using a rubber pipe or a vacuum device after the concrete construction is finished, leveling the concrete by using a laser leveling machine and a manual laser leveling machine, and forming the concrete floor slab after the construction is finished.
The method comprises the following steps of 1.3, spreading carborundum mixture for the first time, and troweling and polishing, wherein the amount of the carborundum mixture for the first time is 2/3 of the total dosage, the carborundum mixture uniformly falls down and cannot be thrown forcefully to separate aggregate and cement in the carborundum mixture, and troweling is performed by using wood after spreading; after the carborundum mixture absorbs moisture, a polishing machine is used for removing the turntable, and the carborundum mixture is milled and dispersed to be combined with the base layer concrete slurry; step 1.4, spreading the carborundum mixture for the second time, and trowelling and polishing, wherein when spreading for the second time, a guiding rule or a straight scraping rod is used for measuring levelness, the unevenness of the first spreading is adjusted, and the direction of the second spreading is vertical to the carborundum mixture spread for the first time; the second spreading of emery mixture in 1/3 amount is completed, the spreading is completed immediately, the polishing operation is repeated at least twice, the polishing operation is performed in criss-cross and orderly mode to prevent the aggregation of the material, the corners are treated with trowels, the emery mixture is spread twice to form emery wear-resisting layer, and the emery mixture is also mixed into the concrete.
The method comprises the following steps of 1.5, extracting slurry, adopting a single-disc troweling machine and a double-disc troweling machine, installing a smoothing disc, repeatedly smoothing when concrete added with the carborundum mixture is initially set until the concrete slurry is extracted, smoothing and smoothing by using the disc troweling machine, and repeatedly compacting and smoothing the concrete longitudinally and transversely; the coverage area of each longitudinal and transverse repeated back-and-forth movement of the troweling machine is not less than 50% of the whole construction block; clear water cannot be obtained in the pulp extracting process, and the pulp is timely cleaned when water exists.
As a preferred scheme of the invention, the method comprises the steps of 1.6, finishing, performing mechanical trowel operation without adding a disc for at least three times after the concrete surface is matt; the hand iron trowel is used for working at places where the mechanical trowel can not work.
As a preferred scheme of the invention, the method comprises the following steps of 1.7, curing the concrete surface layer, and carrying out ordered manual press polishing on the concrete surface layer by adopting a thin steel trowel to finish the modification of the concrete surface layer; covering and maintaining by using a plastic film, geotextile and a template after 7-8 hours of surface layer construction; and after the concrete reaches the form removal strength, removing the side form for positioning the concrete.
As a preferred scheme of the invention, the method comprises the steps of 1.8, sealing, curing and polishing the carborundum terrace, wherein the concrete has 70% of design strength, finely grinding the surface of the concrete, uniformly spraying a concrete sealing and curing agent on the ground and cleaned up the surface of the concrete after the fine grinding is finished, cleaning the whole ground by using clear water when the surface becomes sticky after the curing agent material reacts for 1 hour, and polishing the curing agent after the ground is cleaned.
As a preferred scheme of the invention, the method comprises the steps of 1.9 maintenance and finished product protection, and comprises the steps of 1.9 maintenance and finished product protection, after finishing polishing of the curing agent, spraying a curing agent on the surface, and watering and maintaining the concrete within 2-3 days of the strength of the concrete; the formed concrete adopts three layers of protection, a bottom layer plastic film is covered with heat preservation geotextile or blanket in the middle, and finally the concrete is spliced and paved on a surface layer by using a template.
The invention has the beneficial effects that:
1. the method comprises the steps of preparation before construction; pouring base layer concrete; spreading carborundum mixture for the first time, and leveling and polishing; spreading carborundum mixture for the second time, and leveling and polishing; extracting pulp; collecting light; curing the concrete surface layer; sealing, curing and polishing the carborundum terrace; the concrete floor slab, the carborundum wear-resistant layer and the curing agent of the forming ground are poured through the steps of maintenance, finished product protection and the like, compared with the traditional concrete ground, the maximum deviation of the forming ground in 2m is guaranteed to be 4mm, and the whole forming ground is smooth and the wear resistance of the forming ground is guaranteed.
2. According to the invention, a concrete telescopic post-pouring reinforcing belt is cancelled, and an expansion reinforcing belt with the width of 2000mm is arranged at the junction of construction blocks to reduce ground cracking and ensure the flatness of the ground; meanwhile, the construction is matched with a skip method, so that the problems of ground hollowing and ground sanding, peeling or pitted surface are avoided.
3. The carborundum mixture is broadcast twice, so that the uniform broadcast of the wear-resistant material is ensured, the thickness of the wear-resistant layer is uniform and enough, the water loss is slow, the volume shrinkage and linear shrinkage are not generated, cracks or hollows are not generated, and the ground is ensured to have no color difference and be smooth; after the carborundum mixture is spread, the surface layer is fully ground, compacted and rubbed by a polishing machine, so that the sanding, peeling or pitting of the surface layer is further avoided.
4. The invention has the advantages that the maintenance is in place, and the maintenance time is enough to avoid the sand, the peel or the pitted surface on the ground; meanwhile, after the construction is finished, the construction of a curing agent and the water spraying maintenance are enough for the ground within a specified time; the concrete is not watered with cold water for curing when the temperature of the concrete is higher, thereby avoiding the generation of irregular multiple microcracks.
5. The sealing, curing and polishing of the carborundum terrace disclosed by the invention is divided into a step, a step b step, a step c step and a step d step, and the base planes are polished and polished by epoxy resin grinding discs of 500 meshes, 1000 meshes and 2000 meshes respectively, so that the smoothness and the transparency of the carborundum terrace are further ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a set of construction blocks according to the present invention;
FIG. 3 is a schematic representation of the construction of the inflatable reinforcement belt of the present invention;
FIG. 4 is a schematic structural diagram of a construction block according to the present invention;
FIG. 5 is an enlarged view of a portion of the invention at A;
reference numbers in the figures: the construction method comprises the following steps of a construction block 1, an expansion reinforcing belt 2, adjacent plates 3, a steel wire mesh 4, a reinforced concrete floor 11, a carborundum wear-resistant layer 12, a curing agent 13, a plastic film 14, geotextile 15, a template 16, plate surface reinforcing steel bars 21 and plate surface reinforcing steel bars 111.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1-5, the one-step formed ground of the ultra-flat wear-resistant cast-in-place concrete comprises a plurality of construction blocks 1, wherein the construction blocks 1 are positioned on the same floor, 16 construction blocks are in a group, and expansion reinforcing belts 2 are arranged at the junctions of the construction blocks 1; the construction block 1 comprises a concrete floor 11 at the bottom, a carborundum wear-resistant layer 12 at the upper end of the reinforced concrete floor 11 and a curing agent 13 at the upper end of the carborundum wear-resistant layer 12, wherein the reinforced concrete floor 11 consists of plate surface steel bars 111 and concrete; adjacent plates 3 are formed on the side faces of the construction block 1, the adjacent plates 3 are located on two sides of the expansion reinforcing belt 2, a steel wire mesh 4 is arranged between the adjacent plates 3 and the expansion reinforcing belt 2, and the upper opening line flicking depth of the adjacent plates 3 is larger than or equal to 100 mm.
Specifically, 16 construction blocks are a group, the construction block 1 is divided into A, B, C, D, E and F according to a skip method, sequential pouring is carried out, namely sequential construction of adjacent construction blocks 1 on the same straight line is avoided, sequential construction of adjacent construction blocks 1 on the same vertical line is also avoided, interference between the adjacent construction blocks 1 is effectively avoided, and the problems of flatness, hollowing and the like of the ground are caused, meanwhile, the 16 construction blocks are of a group structure, and the construction block can also be applied to an area with multiple construction blocks 1, such as 12 construction blocks 1 and 18 construction blocks 1.
The width of the expansion reinforcing band 2 is 2000mm at the junction of the construction blocks 1, the length of the expansion reinforcing band 2 is set according to the length of the construction blocks, the plate reinforcing steel bars 21 are arranged in the adjacent expansion reinforcing bands 2 at equal intervals, the width of the expansion reinforcing band 2 is kept enough, and the expansion reinforcing band 2 is not easy to cause ground hollowing.
The construction block 1 consists of a reinforced concrete floor 11, a carborundum wear-resistant layer 12 and a curing agent 13, and the construction block consisting of the reinforced concrete floor, the carborundum wear-resistant layer and the curing agent has higher wear resistance than a common concrete floor.
Moreover, the construction sequence of the expansion reinforcing belt 2 follows the adjacent plates 3, namely when the expansion reinforcing belt 2 is poured, the steel wire meshes 4 on the construction joints of the adjacent plates 3 of the adjacent poured construction blocks 1 are removed, then concrete is poured in the expansion reinforcing belt 2, the reinforcing belt is prevented from being poured after the construction blocks 1 are all poured, and the construction time is prolonged;
the construction method of the ground skip method by one-step molding of the ultra-flat wear-resistant cast-in-place concrete comprises the following steps:
step 1: dividing the same floor to be poured into 6 construction blocks 1, pouring the 6 construction blocks 1 in sequence according to the partition numbering sequence of A, B, C, D, E and F according to a skip method, wherein the pouring interval construction progress between the construction blocks 1 is 7-15 days, and a wide expansion reinforcing band is arranged at the junction of the construction blocks 1; not only avoids the cross construction caused by insufficient interval time, but also avoids the quality problem of the floor caused by overlong interval time. The poured concrete is transported by a ground pump and a 63-meter automobile pump, and a 2000mm wide expansion reinforcing band is arranged at the junction of the construction blocks.
Step 2: the limited expansion rate of the micro-expansion agent doped in the concrete in the expansion reinforcing band range is more than or equal to 0.050 percent; the limited expansion rate of the micro-expansion agent doped in the concrete outside the expansion reinforcing band range is more than or equal to 0.040 percent for the beam slab, the strength grade of the expansion reinforcing band concrete is higher than that of the concrete on two sides by 5MPa, and the concrete micro-expansion agent can be calcium oxide concrete expansion agent.
The performance requirements such as the mixing amount of the expanding agent and the like should meet the technical regulation for compensating shrinkage concrete application JGJ/T178-2009).
And step 3: the construction sequence of the expansion reinforcing belt 2 follows the adjacent plates 3, when the expansion reinforcing belt 2 is poured, the steel wire meshes 4 on the construction joints of the adjacent plates 3 of the adjacent poured construction blocks 1 are removed, and then concrete is poured in the expansion reinforcing belt 2;
the construction of the construction block in the step 1 sequentially comprises the following construction steps: step 1.1 preparation before construction; step 1.2, pouring base layer concrete; step 1.3, spreading carborundum mixture for the first time, and trowelling and polishing; step 1.4, spreading carborundum mixture for the second time, and trowelling and polishing; step 1.5, extracting pulp; step 1.6, light collection; step 1.7, concrete surface layer curing; step 1.8, sealing, curing and polishing the carborundum terrace; and 1.9, maintaining and protecting finished products.
Step 1 comprises preparation before construction in step 1.1, arranging laser transmitters outside the construction blocks 1, and arranging the elevation of the surface of the reinforced concrete floor slab to be poured in each construction block 1 at the same elevation point through the laser transmitters; if the construction block needs to be rotated, elevation closing is needed to avoid the error of the standard height of the plate surface caused by measurement errors; before concrete pouring, the flatness needs to be noticed when the plate surface steel bars 111 are bound, the leveling machine tries to walk on the plate surface steel bars 111, whether the plate surface steel bars 111 have large deformation and warping or not is checked, and the phenomenon that the steel bars of the concrete are tilted in the pouring process to influence the leveling effect of the concrete plate surface is avoided.
Meanwhile, weather information needs to be collected before construction, and pouring and tamping concrete in high-temperature weather selects evening and avoids construction in rainy days; correspondingly, a concrete setting time test is required, a proper concrete mixing ratio and an additive are selected, the condition that the concrete is too fast to set to cause that a subsequent spreading carborundum surface layer cannot be constructed is avoided, the condition that a large amount of cement paste is extruded upwards to affect the surface quality when the concrete is too slow to set to cause that the subsequent spreading carborundum is constructed is avoided, the quality of the concrete is further ensured to meet the requirement, and the generation of cracks on the surface of the concrete is avoided.
Preparation before construction of the construction blocks ensures the flatness of the subsequent concrete plate surface.
Step 1, pouring base layer concrete, namely step 1.2, after the surface steel bars 111 are determined to be flat, watering the foundation through the surface steel bars 111 to keep the foundation in a wet state, pouring the base layer concrete, filling and vibrating concrete materials at the position where the local concrete does not reach the standard height, and strictly forbidding using mortar for repairing; and (3) beating the column, the edge, the corner and other parts bundled by the plate surface steel bars 111 by using a wood trowel, floating cement paste out of the elevation surface of the plate surface by at least 3mm after the concrete is strickled off, removing bleeding by using a rubber tube or a vacuum device after the concrete construction is finished, and repeating the steps for more than two times to start the construction of the carborundum surface layer.
Further, the concrete is leveled by a laser leveling machine, namely after the concrete is manually leveled, the laser leveling machine is immediately used for leveling work, so that the levelness of the surface of the concrete is ensured; the laser leveling machine can receive laser emitted by the laser emitter for 4 times per second, the height is automatically adjusted, and buzzing sound can be emitted once errors occur to prompt workers to measure and correct numerical values in time. Leveling again through a manual laser leveling machine to scrape off floating objects, surface bubbles and the like, so that the flatness of the concrete plate surface is improved; within a small range, leveling is carried out by adopting a 3-meter scraping bar and taking the two sides of the leveled plane as a datum point, wherein the leveling instrument tracks and detects to ensure the flatness of the leveled plane, and a concrete floor 11 is formed after construction is finished.
Meanwhile, the carborundum materials are mixed in the concrete construction process.
The contact surface of the base layer is watered and moistened before concrete is poured, so that the base layer is prevented from absorbing part of moisture in the concrete to influence the combination of the concrete and the base layer, and floor hollowing is formed.
Step 1 comprises the steps of 1.3, spreading the carborundum mixture for the first time, and troweling and polishing, wherein the amount of the carborundum mixture for the first time is 2/3 of the total dosage, the carborundum mixture uniformly falls down and cannot be forcibly polished to separate aggregates and cement in the carborundum mixture, and troweling is carried out by using a wooden trowel after spreading; after the corundum mixture absorbs water, the turntable is removed by a polishing machine, and the emery mixture is milled and dispersed to be combined with the base layer concrete slurry.
The spreading time of the carborundum mixture changes with factors such as climate, temperature, concrete mixing ratio and the like. The carborundum can sink into the concrete and lose the effect when the dispersion is too early; when the concrete is set too late, the adhesive force is lost, so that the carborundum mixture cannot be bonded with the concrete to cause stripping. The method for judging the spreading time of the carborundum mixture is that the carborundum mixture is pedaled on the pedal, and when the carborundum mixture sinks for about 5mm, the first manual spreading construction can be started. The water content of the side lines of the wall, the door, the column, the template and the like disappears quickly, and the construction is preferably spread to prevent the effect from being reduced due to water loss.
Step 1, including step 1.4, spreading the carborundum mixture for the second time, and trowelling and polishing, wherein when spreading for the second time, a guiding rule or a straight scraping rod is used for measuring levelness, the unevenness of the first spreading is adjusted, and the direction of the second spreading is vertical to the carborundum mixture spread for the first time; the second spreading of emery mixture 1/3 in the amount equal to the total amount, spreading immediately, polishing, and repeating polishing operation at least twice, wherein the polishing operation should be performed in a staggered manner vertically and horizontally, so as to prevent the material from gathering, and the corners are treated with trowels; when the surface layer material is hardened until the finger pressure is slightly depressed, the rotating speed and the angle of the polishing machine are adjusted according to the hardening condition, the polishing machine is required to be criss-cross for more than three times during operation, the flatness of the wear-resistant ground is required to be 2m square, the maximum deviation is 4mm, and the phenomena of cracking, peeling and sanding are avoided as much as possible.
The carborundum dosage calculation method comprises the following steps: each square dosage x total construction area = total material sum of current total approach; the total dosage of the diamond dust material which is scattered twice is not less than 5 kg/m.
The carborundum mixture is divided into step 1.3 and step 1.4, the two-time broadcasting ensures the uniformity of the broadcasting of the wear-resistant material, the thickness of the wear-resistant layer is uniform and enough, the water loss is slow, the volume shrinkage and linear shrinkage are not generated, cracks or hollows are not generated, and the ground is ensured to have no color difference and be smooth; meanwhile, the sand, the peel or the pitted surface on the ground is reduced.
After the carborundum mixture is spread, a polishing machine is used for fully polishing, compacting and napping the surface layer for more than or equal to 3 times, so that sanding, peeling or pitting of the surface layer is further avoided.
Step 1 includes step 1.5 and carries out thick liquid, after laser leveling machine and artifical flattening, according to the initial set time of concrete, the people steps on at the concrete face and can step on lighter footprint, but shoes do not sink into the concrete, when the concrete colour becomes shallow, adopts single-disk and double-disk smoothing machine, installs the disc of rubbing flat, rubs flat repeatedly during concrete initial set, until carrying out concrete thick liquids. Rubbing and flattening by using a disc troweling machine, and repeatedly moving back and forth in the longitudinal direction and the transverse direction, so that the concrete is compacted and trowelled; the coverage area of each longitudinal and transverse repeated back-and-forth movement of the troweling machine is not less than 50% of that of the whole construction block 1; clear water cannot be obtained during pulp extraction, and the pulp can be cleaned in time when water exists.
The troweling machine fully trowels the ground, and after leveling is more than or equal to 3 times, the sanding, peeling or pitted surface of the ground is avoided.
Step 1 includes step 1.6, finishing, and performing mechanical trowel operation without adding a disc for at least three times after the surface of concrete is matt according to the hardening condition of the concrete; the operating speed of the machine trowel and the angle of the machine trowel are changed according to the hardness of the concrete floor, and the machine trowel can be operated at a place where the machine trowel can not be operated by the manual iron trowel.
Step 1 includes step 1.7 concrete surface layer maintenance, the surface layer still has more messy abrasive grains after the operation of the polishing machine, and finally, a thin steel trowel is adopted to carry out ordered manual press polishing on the concrete surface layer in order to eliminate the abrasive grains, so as to finish the modification of the concrete surface layer; 7-8 hours after the wear-resistant ground is constructed, covering, water-retaining and curing by adopting a plastic film 14, geotextile 15 and a template 16; and after the concrete reaches the form removal strength, the side form for positioning the concrete can be removed.
Step 1 comprises step 1.8 of sealing, curing and polishing the carborundum terrace, concrete reaches 70% of design strength according to conditions such as construction temperature, humidity and climate, and after the main body structure is finished, polishing of the terrace sealing curing agent can be carried out, so that the flatness, strength and smoothness of the terrace are increased. The method mainly comprises four steps of a, b, c and d, wherein after the base surface is finely ground, the concrete sealing curing agent material is uniformly sprayed on a dry ground which is polished and cleaned, and after the material reacts for 1 hour, the surface becomes sticky, the whole base surface is cleaned by clear water, and the clear water is completely removed. b. And (3) carrying out comprehensive fine grinding for 2-3 times by using a special grinding machine matched with a 500-mesh epoxy resin grinding disc, and carrying out primary polishing on the whole base surface. c. And (5) carrying out comprehensive polishing treatment by using a special grinding machine matched with 1000 epoxy resin grinding discs. d. And (4) carrying out comprehensive polishing treatment by using a professional grinding machine matched with 2000 epoxy resin grinding discs until the ground has smooth hand feeling and glossiness.
Step 1 comprises step 1.9 of maintenance and finished product protection, and after the surface of the curing agent is polished, the site should be closed, and treading can be carried out after 48 hours generally; after the curing agent is constructed, a curing agent is sprayed on the surface (generally spraying is carried out for 6-8 hours after construction), and the concrete is required to be watered and cured within 2-3 days when the concrete reaches the human strength, so that the rapid evaporation of water is prevented, and the ground is protected.
The formed carborundum ground is protected by three layers, a plastic film is arranged at the bottom layer, a heat-preservation geotextile or a blanket is arranged in the middle of the carborundum ground, and finally, the carborundum ground is spliced and paved on the surface layer by using an old template. In the subsequent construction of main bodies and supporting facilities, the materials are instructed by specially-assigned persons and are strictly forbidden to be thrown off. When large structural parts and materials are stacked, sand with the thickness of 20mm is paved on the ground, and 2 layers of 10X 10 pieces of wood are alternately padded under the large structural parts and the materials to prevent the ground from being damaged due to excessive concentrated load.
The maintenance is in place, and the maintenance time is enough to avoid the sand, the skin or the pitted surface on the ground. Meanwhile, after the construction is finished, the construction of a curing agent and the water spraying maintenance are enough for the ground within a specified time; the concrete is not poured with cold water for curing when the temperature of the concrete is higher, so that the generation of irregular multiple micro-cracks is avoided.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: the construction method comprises the following steps of constructing a block 1, an expansion reinforcing belt 2, adjacent plates 3, a steel wire mesh 4, a reinforced concrete floor 11, a carborundum wear-resistant layer 12, a curing agent 13, a PE (polyethylene) film covering 14, a geotextile covering 15, a template 1, a plate surface reinforcing steel bar 21, a plate surface reinforcing steel bar 111 and the like, but the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. Super flat wear-resisting cast in situ concrete one shot forming ground, its characterized in that: the construction method comprises a plurality of construction blocks (1), wherein the construction blocks (1) are positioned on the same floor, 6 construction blocks (1) form a group, and expansion reinforcing belts (2) are arranged at the junctions of the construction blocks (1); the construction block (1) comprises a concrete floor (11) at the bottom, a carborundum wear-resistant layer (12) at the upper end of the reinforced concrete floor (11), and a curing agent (13) at the upper end of the carborundum wear-resistant layer (12), wherein the reinforced concrete floor (11) consists of plate surface reinforcing steel bars (111) and concrete; the side face of the construction block (1) forms an adjacent plate (3), the adjacent plate (3) is located on two sides of the expansion reinforcing belt (2), a steel wire mesh (4) is arranged between the adjacent plate (3) and the expansion reinforcing belt (2), and the upper opening line picking depth of the adjacent plate (3) is larger than or equal to 100 mm.
2. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete is characterized by comprising the following steps of:
step 1: dividing the floor to be poured on the same floor into 6 construction blocks (1), pouring the 6 construction blocks (1) in sequence according to the partition numbering sequence of A, B, C, D, E and F according to a skip method, wherein the pouring interval construction progress between the construction blocks (1) is 7-15 days, and an expansion reinforcing belt (2) is arranged at the junction of the construction blocks (1);
step 2: the limited expansion rate of the micro-expansion agent doped in the concrete in the range of the expansion reinforcing band (2) is more than or equal to 0.050 percent; the limited expansion rate of the micro-expanding agent doped in the concrete outside the range of the expansion reinforcing band (2) is more than or equal to 0.040 percent, and the strength grade of the concrete of the expansion reinforcing band (2) is higher than that of the concrete at the two sides;
and step 3: the construction sequence of the expansion reinforcing belt (2) follows the adjacent plates (3), when the expansion reinforcing belt (2) is poured, the steel wire meshes (4) on the construction joints of the adjacent plates (3) of the adjacent poured construction blocks (1) are removed, and then concrete is poured in the expansion reinforcing belt (2);
the construction of the construction block (1) in the step 1 sequentially comprises the following construction steps: step 1.1 preparation before construction; step 1.2, pouring base layer concrete; step 1.3, spreading carborundum mixture for the first time, and trowelling and polishing; step 1.4, spreading carborundum mixture for the second time, and trowelling and polishing; step 1.5, extracting pulp; step 1.6, light collection; step 1.7, concrete surface layer curing; step 1.8, sealing, curing and polishing the carborundum terrace; and 1.9, maintaining and protecting finished products.
3. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 2, characterized in that: the method comprises the steps of 1.1, preparing before construction, arranging laser transmitters outside construction blocks (1), and arranging the elevation of the surface of a reinforced concrete floor (11) to be poured in each construction block (1) at the same elevation point through the laser transmitters; before concrete pouring, the leveling machine tries to run on the plate surface reinforcing steel bars (111), and whether the plate surface reinforcing steel bars (111) have large deformation and warping or not is checked.
4. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 3, characterized in that: 1.2, pouring base concrete, namely after the surface steel bars (111) are determined to be flat, sprinkling water on the foundation through the surface steel bars (111) to enable the foundation to be in a wet state, pouring concrete, and filling and vibrating concrete materials when local concrete does not reach the elevation; the column, the edge, the corner and other parts bundled by the plate surface reinforcing steel bars (111) are beaten by a wooden trowel, the cement paste floats out of the plate surface elevation to be at least 3mm thick after the concrete is strickled off, bleeding is removed by adopting a rubber tube or a vacuum device after the concrete construction is finished, then the concrete is leveled by a laser leveling machine and a manual laser leveling machine, and a concrete floor slab (11) is formed after the construction is finished.
5. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 4, characterized in that: the method comprises the following steps of 1.3, spreading the carborundum mixture for the first time, and troweling and polishing, wherein the amount of the carborundum mixture for the first time is 2/3 of the total dosage, the carborundum mixture uniformly falls down and cannot be forcibly polished to separate aggregates and cement in the carborundum mixture, and the carborundum mixture is trowelled by using wood after spreading; after the carborundum mixture absorbs moisture, a polishing machine is used for removing the turntable, and the carborundum mixture is milled and dispersed to be combined with the base layer concrete slurry; step 1.4, spreading the carborundum mixture for the second time, and trowelling and polishing, wherein when spreading for the second time, a guiding rule or a straight scraping rod is used for measuring levelness, the unevenness of the first spreading is adjusted, and the direction of the second spreading is vertical to the carborundum mixture spread for the first time; the second spreading of emery mixture in 1/3 amount is completed, the spreading is performed immediately, the grinding operation is repeated at least twice, the grinding operation is performed in criss-cross and orderly mode to prevent the aggregation of the material, the corners are treated with trowels, the emery mixture is spread twice to form emery wear-resistant layer (12), and the emery mixture spread twice is also mixed into the concrete.
6. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 5, characterized in that: the method comprises the following steps of 1.5, extracting slurry, adopting a single-disc troweling machine and a double-disc troweling machine, installing a smoothing disc, repeatedly smoothing when concrete added with carborundum blending materials is initially set until the concrete slurry is extracted, smoothing and smoothing by using the disc troweling machine, and repeatedly compacting and smoothing the concrete longitudinally and transversely; the coverage area of each longitudinal and transverse repeated back-and-forth movement of the troweling machine is not less than 50% of the whole construction block (1); clear water cannot be obtained in the pulp extracting process, and the pulp is timely cleaned when water exists.
7. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 6, characterized in that: step 1.6, after finishing and the surface of concrete is matt, carrying out mechanical trowel operation without installing a disc for at least three times; the hand iron trowel is used for working at places where the mechanical trowel can not work.
8. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 7, characterized in that: the method comprises the following steps of 1.7, maintaining the concrete surface layer, and performing ordered manual press polishing on the concrete surface layer by adopting a thin steel trowel to finish the modification of the concrete surface layer; covering, water-retaining and maintaining by adopting a plastic film (14), geotextile (15) and a template (16) after 7-8 hours of surface layer construction; and after the concrete reaches the form removal strength, removing the side form for positioning the concrete.
9. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 8, characterized in that: the method comprises the steps of 1.8, sealing, curing and polishing the carborundum terrace, grinding the surface of the concrete to be fine when the concrete reaches 70% of design strength, uniformly spraying a concrete sealing curing agent on the ground surface and cleaning the clean concrete surface after the fine grinding is finished, cleaning the whole ground by using clear water when the surface becomes sticky after the curing agent material reacts for 1 hour, and polishing the curing agent after the ground is cleaned.
10. The construction method of the one-step forming ground skip method of the ultra-flat wear-resistant cast-in-place concrete according to claim 9, characterized in that: the method comprises the following steps of 1.9, maintaining, curing and protecting finished products, wherein after a curing agent is polished, a curing agent is sprayed on the surface of the concrete, and the concrete is watered and cured within 2-3 days of the strength of the concrete; the formed concrete adopts three layers of protection, a bottom layer plastic film (14) is covered with a heat preservation geotextile (15) or a blanket in the middle, and finally the concrete is spliced and paved on a surface layer by a template (16).
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| CN118065584A (en) * | 2024-04-08 | 2024-05-24 | 广东省源天工程有限公司 | One-step forming construction method for emery wear-resistant ground |
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| CN118065584A (en) * | 2024-04-08 | 2024-05-24 | 广东省源天工程有限公司 | One-step forming construction method for emery wear-resistant ground |
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