CN110963771A - Quick-turnover high-durability reinforced concrete drain pipe and manufacturing method thereof - Google Patents
Quick-turnover high-durability reinforced concrete drain pipe and manufacturing method thereof Download PDFInfo
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- CN110963771A CN110963771A CN201911209901.0A CN201911209901A CN110963771A CN 110963771 A CN110963771 A CN 110963771A CN 201911209901 A CN201911209901 A CN 201911209901A CN 110963771 A CN110963771 A CN 110963771A
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 40
- 239000004567 concrete Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000004568 cement Substances 0.000 claims abstract description 12
- 239000011398 Portland cement Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 39
- 230000002787 reinforcement Effects 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 13
- 239000004575 stone Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 150000004683 dihydrates Chemical class 0.000 claims description 6
- 239000010881 fly ash Substances 0.000 claims description 6
- 229910052602 gypsum Inorganic materials 0.000 claims description 6
- 239000010440 gypsum Substances 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 239000012452 mother liquor Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 12
- 230000007547 defect Effects 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 2
- 230000003628 erosive effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 20
- 230000007306 turnover Effects 0.000 description 6
- 230000003487 anti-permeability effect Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000004566 building material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a fast-turnover high-durability reinforced concrete drain pipe which is prepared from the following raw materials in parts by mass: 40-60 parts of aggregate, 15-25 parts of cementing material, 15-30 parts of admixture and 1-2 parts of special water reducing agent. Meanwhile, the invention also discloses a manufacturing method of the reinforced concrete drain pipe. The sulphoaluminate cement clinker has higher frost resistance, impermeability, chloride ion resistance and sulfate erosion resistance, so that the defect of the durability of the Portland cement is overcome. The grain composition of the aggregate is reasonably matched and controlled, and the superfine admixture is doped, so that the compactness of the concrete is greatly improved, and the anti-erosion capability of the concrete is further enhanced. Meanwhile, the sulphoaluminate cement has shorter setting time, the formula mixing amount is reasonably determined through a large amount of experiments, and the early strength type water reducing agent is matched, so that the produced concrete drain pipe can be demoulded within 3-5h, the production time of a single drain pipe is greatly shortened, the production efficiency is greatly improved, and meanwhile, the sulphoaluminate cement has good durability.
Description
Technical Field
The invention relates to a building material technology, in particular to the field of drain pipes, and particularly relates to a fast-turnover high-durability reinforced concrete drain pipe and a manufacturing method thereof.
Background
Concrete drainage pipes are an important prefabricated building material. Because the setting time of the common concrete is longer, the common concrete drain pipe is usually cured by steaming with a mould or at normal temperature. Steam curing consumes a large amount of heat energy, and the normal-temperature curing needs a long time, so that the turnover of the die and the production efficiency are affected, and the problems of poor durability exist. Therefore, how to improve the production efficiency of the concrete drain pipe, quicken the turnover of the mould and simultaneously produce the high-quality and high-durability concrete drain pipe is a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a reinforced concrete drain pipe and a manufacturing method thereof, wherein the reinforced concrete drain pipe can reduce the concrete setting time, improve the production efficiency and enhance the durability of the concrete drain pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fast-turnover high-durability reinforced concrete drain pipe is prepared from the following raw materials in parts by mass: 40-60 parts of aggregate, 15-25 parts of cementing material, 15-30 parts of admixture, 1-2 parts of special water reducing agent and 4.5-6 parts of water.
The aggregate is prepared from the following raw materials in parts by mass: 50-60 parts of stones with the particle size of not more than 25mm, 35-45 parts of medium sand with the fineness modulus of 2.4-2.8 and 5-10 parts of 50-mesh stone powder.
The gel material is prepared by the following method: 40-60 parts of Portland cement clinker, 5-8 parts of sulphoaluminate cement clinker and 3-5 parts of dihydrate gypsum are mixed and then levigated according to the parts by mass, the specific surface area is controlled between 350 and 400 m/kg, and the effective particles of 3-30um account for 70-80 percent.
The admixture is prepared from the following raw materials in parts by mass: 15-25 parts of II-grade fly ash, 20-30 parts of S95 mineral powder, 5-10 parts of metakaolin and 3-8 parts of silica micropowder.
The special water reducing agent is prepared from the following raw materials in parts by mass: 5-8 parts of early strength type water reducing agent mother liquor, 3-6 parts of slump retaining agent, 0.1-0.3 part of air entraining agent, 0.1-0.2 part of defoaming agent and 0.2-0.4 part of thickening agent.
The drain pipe reinforcement cage is formed by welding according to the national standard (conforming to the national standard GBT 11836-.
A method for manufacturing a fast-turnover high-durability reinforced concrete drain pipe comprises the following steps:
the method comprises the following steps: weighing aggregate, admixture, cementing material, water and a special water reducing agent according to the designed mixing proportion, and then dissolving the special water reducing agent in the water;
step two: sequentially adding the aggregate, the admixture and the cementing material into a stirrer for pre-stirring for 30 s;
step three: adding the water solution of the special water reducing agent into the stirrer and stirring for 120 s;
step four: and placing the produced reinforcement cage in a mold with a vibrating core mold, pouring the mixed concrete into the reinforcement cage, and performing vibration molding.
Step five: and standing for 3 hours after molding, and demolding.
In the scheme, the concrete compressive strength is a strength value obtained by adopting a standard maintenance method and a standard experiment method for a cubic test piece with the thickness of 150mm multiplied by 150mm, and according to a specified calculation method.
In the scheme, the impermeability of the concrete is measured by a step-by-step pressurization method, the water pressure is increased by 0.1 MP from 0.1 MP in the experiment, the water pressure of 0.1 MP is increased every 8 hours later, the water seepage condition of the surface of the test piece is observed at any time, the pressurization is stopped when 3 test pieces in 6 test pieces have water seepage, and the water pressure at the moment is recorded.
The vibration of the core mold in the present invention is a conventional apparatus, and will not be described herein.
The fast-turnover high-durability reinforced concrete drain pipe has excellent performance. Compared with the existing general reinforced concrete drain pipe, the reinforced concrete drain pipe has the advantages of fast strength development, short demoulding time and good durability. The fast-turnover high-durability reinforced concrete drain pipe prepared by the method can be demoulded 3h after forming, the compressive strength of 3h is more than or equal to 20MPa, the compressive strength of 28d is more than or equal to 50MPa, and the anti-permeability grade can reach more than P12.
The invention has the beneficial effects that: the stone powder is doped into the aggregate, so that the cost is saved, and the chemical reaction in the concrete has more nucleation barriers to accelerate the reaction. Under the reasonable collocation of various clinkers, the specific surface area is adjusted, so that the hydration reaction time of the clinkers is better in accordance with the actual production. The incorporation of various admixtures further increases the compactness of the concrete. The adjustment of the water reducing agent enables the concrete to be shaped within a certain time range while being early strengthened, so that the concrete can be better adapted to actual production.
In the invention, the sulphoaluminate cement clinker has higher frost resistance, impermeability, chloride ion resistance and sulfate erosion resistance, thus making up for the defects of the durability of the Portland cement. The grain composition of the aggregate is reasonably matched and controlled, and the superfine admixture is doped, so that the compactness of the concrete is greatly improved, and the anti-erosion capability of the concrete is further enhanced. Meanwhile, the sulphoaluminate cement has shorter setting time, the formula mixing amount is reasonably determined through a large amount of experiments, and the early strength type water reducing agent is matched, so that the produced concrete drain pipe can be demoulded within 3-5h, the production time of a single drain pipe is greatly shortened, the production efficiency is greatly improved, and meanwhile, the sulphoaluminate cement has good durability.
Detailed Description
The present invention will be further described with reference to the following examples.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the efficacy and the achievable purpose of the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1:
the fast-turnover high-durability reinforced concrete drain pipe is prepared from the following raw materials in parts by mass: 40 parts of aggregate, 15 parts of cementing material, 15 parts of admixture, 1 part of special water reducing agent and 4.5 parts of water.
The aggregate is prepared from the following raw materials in parts by mass: 50 parts of stones with the particle size of not more than 25mm, 35 parts of medium sand with the fineness modulus of 2.4 and 5 parts of 50-mesh stone powder.
The gelled material is prepared by the following method: 40 parts of Portland cement clinker, 5 parts of sulphoaluminate cement clinker and 3 parts of dihydrate gypsum are mixed and ground according to the parts by mass, the specific surface area is controlled to be 350 m/kg, and 3um active particles account for 70%.
The admixture is prepared from the following raw materials in parts by mass: 15 parts of II-grade fly ash, 20 parts of S95 mineral powder, 5 parts of metakaolin and 3 parts of silicon micropowder.
The special water reducing agent is prepared from the following raw materials in parts by mass: 5 parts of early strength type water reducing agent mother liquor, 3 parts of slump retaining agent, 0.1 part of air entraining agent, 0.1 part of defoaming agent and 0.2 part of thickening agent.
The drain pipe reinforcement cage is formed by welding according to the national standard (conforming to the national standard GBT 11836-.
The fast turnover high-durability reinforced concrete drain pipe making process includes the following steps:
the method comprises the following steps: weighing aggregate, admixture, cementing material, water and a special water reducing agent according to the designed mixing proportion, and then dissolving the special water reducing agent in the water;
step two: sequentially adding the aggregate, the admixture and the cementing material into a stirrer for pre-stirring for 30 s;
step three: adding the water solution of the special water reducing agent into the stirrer and stirring for 120 s;
step four: and placing the produced reinforcement cage in a mold with a vibrating core mold, pouring the mixed concrete into the reinforcement cage, and performing vibration molding.
Step five: and standing for 3 hours after molding, and demolding.
In the scheme, the concrete compressive strength is a strength value obtained by adopting a standard maintenance method and a standard experiment method for a cubic test piece with the thickness of 150mm multiplied by 150mm, and according to a specified calculation method.
In the scheme, the impermeability of the concrete is measured by a step-by-step pressurization method, the water pressure is increased by 0.1 MP from 0.1 MP in the experiment, the water pressure of 0.1 MP is increased every 8 hours later, the water seepage condition of the surface of the test piece is observed at any time, the pressurization is stopped when 3 test pieces in 6 test pieces have water seepage, and the water pressure at the moment is recorded.
The fast-turnover high-durability reinforced concrete drain pipe has excellent performance. Compared with the existing general reinforced concrete drain pipe, the reinforced concrete drain pipe has the advantages of fast strength development, short demoulding time and good durability. The fast-turnover high-durability reinforced concrete drain pipe prepared by the method can be demoulded 3h after forming, the compressive strength of 3h is more than or equal to 20MPa, the compressive strength of 28d is more than or equal to 50MPa, and the anti-permeability grade can reach more than P12.
Example 2:
the fast-turnover high-durability reinforced concrete drain pipe is prepared from the following raw materials in parts by mass: 50 parts of aggregate, 20 parts of cementing material, 23 parts of admixture, 1.5 parts of special water reducing agent and 5.5 parts of water.
The aggregate is prepared from the following raw materials in parts by mass: 55 parts of stones with the particle size not larger than 25mm, 40 parts of medium sand with the fineness modulus of 2.6 and 8 parts of stone powder.
The gelled material is prepared by the following method: according to the parts by mass, 50 parts of portland cement clinker, 7 parts of sulphoaluminate cement clinker and 4 parts of dihydrate gypsum are mixed and then ground, the specific surface area is controlled to be 380 m/kg, and 18um active particles account for 75 percent.
The admixture is prepared from the following raw materials in parts by mass: 20 parts of II-grade fly ash, 25 parts of S95 mineral powder, 7 parts of metakaolin and 5 parts of silicon micropowder.
The special water reducing agent is prepared from the following raw materials in parts by mass: 7 parts of early strength type water reducing agent mother liquor, 5 parts of slump retaining agent, 0.2 part of air entraining agent, 0.2 part of defoaming agent and 0.3 part of thickening agent.
The drain pipe reinforcement cage is formed by welding according to the national standard (conforming to the national standard GBT 11836-.
The fast turnover high-durability reinforced concrete drain pipe making process includes the following steps:
the method comprises the following steps: weighing aggregate, admixture, cementing material, water and a special water reducing agent according to the designed mixing proportion, and then dissolving the special water reducing agent in the water;
step two: sequentially adding the aggregate, the admixture and the cementing material into a stirrer for pre-stirring for 30 s;
step three: adding the water solution of the special water reducing agent into the stirrer and stirring for 120 s;
step four: and placing the produced reinforcement cage in a mold with a vibrating core mold, pouring the mixed concrete into the reinforcement cage, and performing vibration molding.
Step five: and standing for 3 hours after molding, and demolding.
In the scheme, the concrete compressive strength is a strength value obtained by adopting a standard maintenance method and a standard experiment method for a cubic test piece with the thickness of 150mm multiplied by 150mm, and according to a specified calculation method.
In the scheme, the impermeability of the concrete is measured by a step-by-step pressurization method, the water pressure is increased by 0.1 MP from 0.1 MP in the experiment, the water pressure of 0.1 MP is increased every 8 hours later, the water seepage condition of the surface of the test piece is observed at any time, the pressurization is stopped when 3 test pieces in 6 test pieces have water seepage, and the water pressure at the moment is recorded.
The fast-turnover high-durability reinforced concrete drain pipe has excellent performance. Compared with the existing general reinforced concrete drain pipe, the reinforced concrete drain pipe has the advantages of fast strength development, short demoulding time and good durability. The fast-turnover high-durability reinforced concrete drain pipe prepared by the method can be demoulded 3h after forming, the compressive strength of 3h is more than or equal to 20MPa, the compressive strength of 28d is more than or equal to 50MPa, and the anti-permeability grade can reach more than P12.
Example 3:
the fast-turnover high-durability reinforced concrete drain pipe is prepared from the following raw materials in parts by mass: 60 parts of aggregate, 25 parts of cementing material, 30 parts of admixture, 2 parts of special water reducing agent and 6 parts of water.
The aggregate is prepared from the following raw materials in parts by mass: 60 parts of stones with the particle size of not more than 25mm, 45 parts of medium sand with the fineness modulus of 2.8 and 10 parts of stone powder.
The gelled material is prepared by the following method: according to the parts by mass, 60 parts of portland cement clinker, 8 parts of sulphoaluminate cement clinker and 5 parts of dihydrate gypsum are mixed and then ground, the specific surface area is controlled to be between 400 m/kg, and 30um active particles account for 80%.
The admixture is prepared from the following raw materials in parts by mass: 25 parts of II-grade fly ash, 30 parts of S95 mineral powder, 10 parts of metakaolin and 8 parts of silicon micropowder.
The special water reducing agent is prepared from the following raw materials in parts by mass: 8 parts of early strength type water reducing agent mother liquor, 6 parts of slump retaining agent, 0.3 part of air entraining agent, 0.2 part of defoaming agent and 0.4 part of thickening agent.
The drain pipe reinforcement cage is formed by welding according to the national standard (conforming to the national standard GBT 11836-.
The fast turnover high-durability reinforced concrete drain pipe making process includes the following steps:
the method comprises the following steps: weighing aggregate, admixture, cementing material, water and a special water reducing agent according to the designed mixing proportion, and then dissolving the special water reducing agent in the water;
step two: sequentially adding the aggregate, the admixture and the cementing material into a stirrer for pre-stirring for 30 s;
step three: adding the water solution of the special water reducing agent into the stirrer and stirring for 120 s;
step four: and placing the produced reinforcement cage in a mold with a vibrating core mold, pouring the mixed concrete into the reinforcement cage, and performing vibration molding.
Step five: and standing for 3 hours after molding, and demolding.
In the scheme, the concrete compressive strength is a strength value obtained by adopting a standard maintenance method and a standard experiment method for a cubic test piece with the thickness of 150mm multiplied by 150mm, and according to a specified calculation method.
In the scheme, the impermeability of the concrete is measured by a step-by-step pressurization method, the water pressure is increased by 0.1 MP from 0.1 MP in the experiment, the water pressure of 0.1 MP is increased every 8 hours later, the water seepage condition of the surface of the test piece is observed at any time, the pressurization is stopped when 3 test pieces in 6 test pieces have water seepage, and the water pressure at the moment is recorded.
The fast-turnover high-durability reinforced concrete drain pipe has excellent performance. Compared with the existing general reinforced concrete drain pipe, the reinforced concrete drain pipe has the advantages of fast strength development, short demoulding time and good durability. The fast-turnover high-durability reinforced concrete drain pipe prepared by the method can be demoulded 3h after forming, the compressive strength of 3h is more than or equal to 20MPa, the compressive strength of 28d is more than or equal to 50MPa, and the anti-permeability grade can reach more than P12.
Example 4:
the fast-turnover high-durability reinforced concrete drain pipe is prepared from the following raw materials in parts by mass: 60 parts of aggregate, 15 parts of cementing material, 22 parts of admixture, 2 parts of special water reducing agent and 5.3 parts of water.
The aggregate is prepared from the following raw materials in parts by mass: 55 parts of stones with the particle size of not more than 25mm, 40 parts of medium sand with the fineness modulus of 2.5 and 10 parts of stone powder.
The gelled material is prepared by the following method: according to the parts by mass, 60 parts of portland cement clinker, 5 parts of sulphoaluminate cement clinker and 3 parts of dihydrate gypsum are mixed and ground, the specific surface area is controlled to be between 400 m/kg, and 28um active particles account for 72 percent.
The admixture is prepared from the following raw materials in parts by mass: 23 parts of II-grade fly ash, 20 parts of S95 mineral powder, 7 parts of metakaolin and 8 parts of silicon micropowder.
The special water reducing agent is prepared from the following raw materials in parts by mass: 7 parts of early strength type water reducing agent mother liquor, 4 parts of slump retaining agent, 0.1 part of air entraining agent, 0.2 part of defoaming agent and 0.3 part of thickening agent.
The drain pipe reinforcement cage is formed by welding according to the national standard (conforming to the national standard GBT 11836-.
The fast turnover high-durability reinforced concrete drain pipe making process includes the following steps:
the method comprises the following steps: weighing aggregate, admixture, cementing material, water and a special water reducing agent according to the designed mixing proportion, and then dissolving the special water reducing agent in the water;
step two: sequentially adding the aggregate, the admixture and the cementing material into a stirrer for pre-stirring for 30 s;
step three: adding the water solution of the special water reducing agent into the stirrer and stirring for 120 s;
step four: and placing the produced reinforcement cage in a mold with a vibrating core mold, pouring the mixed concrete into the reinforcement cage, and performing vibration molding.
Step five: and standing for 3 hours after molding, and demolding.
In the scheme, the concrete compressive strength is a strength value obtained by adopting a standard maintenance method and a standard experiment method for a cubic test piece with the thickness of 150mm multiplied by 150mm, and according to a specified calculation method.
In the scheme, the impermeability of the concrete is measured by a step-by-step pressurization method, the water pressure is increased by 0.1 MP from 0.1 MP in the experiment, the water pressure of 0.1 MP is increased every 8 hours later, the water seepage condition of the surface of the test piece is observed at any time, the pressurization is stopped when 3 test pieces in 6 test pieces have water seepage, and the water pressure at the moment is recorded.
The fast-turnover high-durability reinforced concrete drain pipe has excellent performance. Compared with the existing general reinforced concrete drain pipe, the reinforced concrete drain pipe has the advantages of fast strength development, short demoulding time and good durability. The fast-turnover high-durability reinforced concrete drain pipe prepared by the method can be demoulded 3h after forming, the compressive strength of 3h is more than or equal to 20MPa, the compressive strength of 28d is more than or equal to 50MPa, and the anti-permeability grade can reach more than P12.
Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (8)
1. The fast-turnover high-durability reinforced concrete drain pipe is characterized by being prepared from the following raw materials in parts by mass: 40-60 parts of aggregate, 15-25 parts of cementing material, 15-30 parts of admixture, 1-2 parts of special water reducing agent and 4.5-6 parts of water.
2. The quick-turnover high-durability reinforced concrete drain pipe as claimed in claim 1, wherein the aggregate is made of the following raw materials in parts by mass: 50-60 parts of stones with the particle size of not more than 25mm, 35-45 parts of medium sand with the fineness modulus of 2.4-2.8 and 5-10 parts of stone powder.
3. The quick-turnover high-durability reinforced concrete drain pipe according to claim 1, wherein the cementing material is prepared by the following method: 40-60 parts of Portland cement clinker, 5-8 parts of sulphoaluminate cement clinker and 3-5 parts of dihydrate gypsum are mixed and then levigated according to the parts by mass, the specific surface area is controlled between 350 and 400 m/kg, and the effective particles of 3-30um account for 70-80 percent.
4. The quick-turnover high-durability reinforced concrete drain pipe as claimed in claim 1, wherein the admixture is prepared from the following raw materials in parts by mass: 15-25 parts of II-grade fly ash, 20-30 parts of S95 mineral powder, 5-10 parts of metakaolin and 3-8 parts of silica micropowder.
5. The quick-turnover high-durability reinforced concrete drain pipe as claimed in claim 1, wherein the special water reducing agent is prepared from the following raw materials in parts by mass: 5-8 parts of early strength type water reducing agent mother liquor, 3-6 parts of slump retaining agent, 0.1-0.3 part of air entraining agent, 0.1-0.2 part of defoaming agent and 0.2-0.4 part of thickening agent.
6. A manufacturing method of a fast-turnover high-durability reinforced concrete drain pipe is characterized by comprising the following steps:
the method comprises the following steps: weighing aggregate, admixture, cementing material, water and a special water reducing agent according to the designed mixing proportion, and then dissolving the special water reducing agent in the water;
step two: sequentially adding the aggregate, the admixture and the cementing material into a stirrer for pre-stirring for 30 s;
step three: adding the water solution of the special water reducing agent into the stirrer and stirring for 120 s;
step four: placing the produced reinforcement cage in a mold with a vibrating core mold, pouring the concrete mixed in the step three into the reinforcement cage, and performing vibration molding;
step five: and standing for 3 hours after molding, and demolding.
7. The method for manufacturing the fast-turnover high-durability reinforced concrete drain pipe as claimed in claim 6, wherein the reinforcement cage of the drain pipe is welded according to the national standard GBT 11836-2009 and is formed by adopting a core mold vibration process.
8. The manufacturing method of the fast-turnover high-durability reinforced concrete drain pipe as claimed in claim 6, wherein the manufactured fast-turnover high-durability reinforced concrete drain pipe has a 3h compressive strength of not less than 20MPa, a 28d compressive strength of not less than 50MPa, and a permeability resistance grade of more than P12.
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