CN113279597A - Construction method of novel reinforced masonry structure - Google Patents
Construction method of novel reinforced masonry structure Download PDFInfo
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- CN113279597A CN113279597A CN202110541626.3A CN202110541626A CN113279597A CN 113279597 A CN113279597 A CN 113279597A CN 202110541626 A CN202110541626 A CN 202110541626A CN 113279597 A CN113279597 A CN 113279597A
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 69
- 229920000642 polymer Polymers 0.000 claims abstract description 52
- 239000003513 alkali Substances 0.000 claims abstract description 29
- 239000003365 glass fiber Substances 0.000 claims abstract description 29
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000011049 filling Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 abstract description 19
- 230000008439 repair process Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 13
- 229920001688 coating polymer Polymers 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 20
- 239000000843 powder Substances 0.000 description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 description 5
- 239000002518 antifoaming agent Substances 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 5
- 239000011325 microbead Substances 0.000 description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 229920002472 Starch Polymers 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- 235000019698 starch Nutrition 0.000 description 4
- 239000006004 Quartz sand Substances 0.000 description 3
- 229920003086 cellulose ether Polymers 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical group O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000001341 hydroxy propyl starch Substances 0.000 description 1
- 235000013828 hydroxypropyl starch Nutrition 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0222—Replacing or adding wall ties
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The application provides a construction method of a novel reinforced masonry structure, which comprises the following steps: cleaning the surface of the block body; cutting a plurality of mortar joints on the building block body; filling the mortar joint with polymer mortar; coating polymer mortar on the surface of the block body to form a first polymer mortar layer; pasting an alkali-resistant glass fiber net on the surface of the first polymer mortar layer and leveling; and coating polymer mortar on the surface of the alkali-resistant glass fiber net to form a second polymer mortar layer. The application provides a novel construction method for reinforcing masonry structure, adopts polymer repair mortar and alkali-resistant glass fiber net to jointly reinforce the masonry block, has simple process, low cost, and the characteristics of good reinforcing effect.
Description
Technical Field
The application relates to the technical field of building structures, in particular to a construction method for a novel reinforced masonry structure.
Background
The masonry structure is widely applied, and a large number of building structures using inner and outer walls of the masonry structure to bear load are arranged in a building system of China. The basic mechanical characteristics of the masonry are that the compression strength is very high, the tensile strength and the shear strength are very low, and the masonry is very easy to damage in a major earthquake due to the brittleness characteristics, so that casualties and property loss are caused. It is therefore necessary to reinforce in advance masonry structural houses or hybrid structural houses that are loaded with masonry walls where failure characteristics occur.
The conventional masonry structure reinforcing method mainly comprises the following steps: the method for reinforcing the fiber composite material by sticking, the method for reinforcing the steel plate by sticking and the like have the problems of complex construction process, long construction period, difficult guarantee of construction quality, poor material performance, easy pollution and the like. Therefore, the application provides a novel construction method for reinforcing the masonry structure.
Disclosure of Invention
The application aims to solve the problems and provides a construction method and a preparation method of a novel reinforced masonry structure.
The application provides a construction method of a novel reinforced masonry structure, which comprises the following steps:
cleaning the surface of the block body;
cutting a plurality of mortar joints on the building block body;
filling the mortar joint with polymer mortar;
coating polymer mortar on the surface of the block body to form a first polymer mortar layer;
pasting an alkali-resistant glass fiber net on the surface of the first polymer mortar layer and leveling;
and coating polymer mortar on the surface of the alkali-resistant glass fiber net to form a second polymer mortar layer.
According to the technical scheme provided by certain embodiments of the application, the thickness of the first polymer mortar layer is 15 mm.
According to certain embodiments of the present disclosure, the second polymer mortar layer has a thickness of 5 mm.
According to the technical scheme provided by certain embodiments of the application, the first polymer mortar layer and the alkali-resistant glass fiber net are bonded through epoxy resin glue.
According to the technical scheme provided by some embodiments of the application, the tensile strength of the epoxy resin adhesive is greater than 18 MPa.
According to the technical scheme provided by some embodiments of the application, the width of the mortar joint is 10 mm.
According to the technical scheme provided by some embodiments of the application, the alkali-resistant glass fiber net is formed by crosswise weaving warp fibers and weft fibers, and the grid spacing is 5 mm.
According to the technical scheme provided by certain embodiments of the application, the polymer mortar comprises the following components in parts by weight:
compared with the prior art, the beneficial effect of this application: this novel construction method of reinforcing masonry structure, adopt polymer repair mortar and alkali-resistant glass fiber net to consolidate the brickwork block jointly, simple process, wet work is few, do not need large-scale complicated machinery and the construction occupies the place few, low cost, polymer mortar can improve the antidetonation bearing capacity of original structure, alkali-resistant glass fiber net has good ductility, can restrain the fissured production of brickwork block and further develop, the durability of reinforcing brickwork wall body, save the maintenance cost, polymer repair mortar can be fine dip in the inside of alkali-resistant glass fiber net, better and alkali-resistant glass fiber net collaborative work, it is effectual to consolidate.
Drawings
Fig. 1 is a flowchart of a construction method of a novel reinforced masonry structure according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment provides a construction method of a novel reinforced masonry structure, as shown in fig. 1, the method includes the following steps:
and S1, cleaning the surface of the block body, wherein the cleaning is to remove broken loose wall blocks and powder.
And S2, cutting a plurality of mortar joints on the building block body, wherein the width of the mortar joints is 10 mm.
And S3, filling the mortar joint with polymer mortar.
The polymer mortar is prepared in advance and comprises the following components in parts by weight: 54-55 parts of rubber powder; 164-164.3 parts of a water reducing agent; 10-11 parts of cellulose ether; 10-11 parts of starch ether; 5-6 parts of a defoaming agent; 24-25 parts of an expanding agent; 1700-1764.4 parts of water; 20-24.3 parts of polyvinyl alcohol; 4470-4490.3 parts of cement; 390-394.3 parts of slag powder; 42.1-43.8 parts of microbeads; 1505.55-1506 parts of water-washed yellow sand; 1505.55-1506 parts of quartz sand. The cement is ordinary Portland cement P.O42.5, the slag powder is S105 grade, the rubber powder is redispersible latex powder, the water reducing agent is a sulfonated melamine water reducing agent, the starch ether is hydroxypropyl starch ether, and the defoaming agent is an organic silicon defoaming agent JQ-904.
In this embodiment, the compound mortar comprises the following components in parts by weight: 54.8 parts of rubber powder; 164.3 parts of a water reducing agent; 10.9 parts of cellulose ether; 10.9 parts of starch ether; 5.5 parts of a defoaming agent; 24.6 parts of an expanding agent; 1764.4 parts of water; 24.3 parts of polyvinyl alcohol; 4490.3 parts of cement; 394.3 parts of slag powder; 43.8 parts of microbeads; 1505.9 parts of yellow sand washed by water; 1505.9 parts of quartz sand.
The polymer mortar was prepared by the following method:
mixing and stirring the rubber powder, the water reducing agent, the cellulose ether, the starch ether, the defoaming agent and the expanding agent uniformly in parts by weight to obtain a mixture A;
mixing and stirring the cement, the slag powder, the polyvinyl alcohol, the micro-beads, the washed yellow sand and the quartz sand uniformly in parts by weight to obtain a mixture B;
and (3) mixing and stirring the water, the mixture A and the mixture B uniformly to obtain a finished product of the polymer repair mortar.
S4, coating polymer mortar on the surface of the block body to form a first polymer mortar layer, wherein the thickness of the first polymer mortar layer is 15 mm.
S5, adhering and leveling an alkali-resistant glass fiber net on the surface of the first polymer mortar layer, wherein the alkali-resistant glass fiber net is formed by crosswise weaving warp fibers and weft fibers, and the grid spacing is 5 mm; the first polymer mortar layer and the alkali-resistant glass fiber net are bonded through epoxy resin glue, and the tensile strength of the epoxy resin glue is greater than 18 MPa.
S6, coating polymer mortar on the surface of the alkali-resistant glass fiber net to form a second polymer mortar layer, wherein the polymer mortar can completely cover the alkali-resistant glass fiber net, the surface is smooth and uniform, and the thickness of the second polymer mortar layer is 5 mm.
Test 1
The test is used for testing the diagonal shear bearing capacity of the masonry block reinforced by the novel masonry structure reinforcing construction method.
At first, make three the same experimental brickwork blocks, the size of brickwork block is: length × height × width 490mm × 494mm × 240 mm; three experimental brickwork blocks are marked as a first brickwork block, a second brickwork block and a third brickwork block respectively.
The first masonry block is not treated;
loading the opposite angle of the second masonry block until the second masonry block cracks, only adopting polymer mortar to repair and reinforce the second masonry block without adopting an alkali-resistant glass fiber net, and referring to the construction method of the novel reinforced masonry structure provided by the embodiment of the application for other method steps;
and loading the opposite angle of the third masonry block to the crack of the third masonry block, and repairing and reinforcing the third masonry block by using the novel masonry structure reinforcing construction method provided by the embodiment of the application.
Carry out diagonal shear test to above-mentioned three brickwork blocks respectively, the test result is:
the diagonal shear-resistant bearing capacity of the third masonry block is improved by 116.7% compared with that of the first masonry block; the diagonal shear bearing capacity of the third masonry block is improved by 11.5% compared with that of the second masonry block.
The test result shows that when the novel masonry structure reinforcing construction method provided by the embodiment is used for repairing and reinforcing the masonry block, the diagonal shear bearing capacity of the masonry block can be obviously improved.
Test 2
The test is used for testing the seismic performance of the masonry block reinforced by the novel masonry structure reinforcing construction method.
Firstly, two identical test masonry block bodies of the wall between the windows are manufactured, the two test masonry block bodies are a test model which is subjected to scale reduction according to the ratio of 1:2 of the actual masonry wall of a certain project, the thickness of each test masonry block body is 240mm, the upper portion and the lower portion of each test masonry block body are respectively connected with a reinforced concrete beam, and the diameter of a preformed hole at each end of a bottom beam is 80 mm. And the two test masonry blocks are respectively marked as a fourth masonry block and a fifth masonry block.
The fourth masonry block is not treated;
and loading the fifth masonry block to the damaged fifth masonry block under the action of low-cycle repeated load, and repairing and reinforcing the fifth masonry block by using the novel masonry structure reinforcing construction method provided by the embodiment of the application.
Loading according to the method described in the building earthquake resistance test method regulation (JGJ101-96), respectively performing pseudo-static test on the two masonry blocks by adopting a load-deformation control method, wherein during the test, the vertical compressive stress on the top beam is the actual stress of the project, namely sigma00.6 MPa. The test result shows that:
(1) the novel masonry structure reinforcing construction method provided by the embodiment is adopted to repair and reinforce the masonry blocks, so that the ultimate bearing capacity and ductility of the masonry blocks can be improved, the integrity of the masonry blocks can be enhanced, the rigidity degradation can be delayed, and the seismic performance of the masonry blocks is improved;
(2) the hysteresis curve of the masonry block body reinforced by the construction method for the novel reinforced masonry structure provided by the embodiment is full, the deformation capacity and the energy consumption capacity are improved, the masonry block body can show different signs before being damaged to generate ductile damage, and the brittle damage characteristic of a test piece is greatly improved;
(3) the alkali-resistant glass fiber net plays the characteristics of high tensile strength and large elongation rate in a pseudo-static test, so that the rigidity degradation rate of the masonry block is slowed down, the deformation capability is improved, and the anti-seismic performance of the masonry block is improved to a certain extent;
(4) the alkali-resistant glass fiber mesh restrains the window wall in the polymer repair mortar to prevent cracks from developing, so that the ultimate bearing capacity of the masonry block of the window wall is improved;
(5) the polymer repair mortar can be effectively combined with the alkali-resistant glass fiber net and can be firmly connected with the clay masonry block, and the surface of the reinforced inter-window wall masonry block body can be prevented from hollowing and cracking.
The utility model provides a novel construction method who consolidates masonry structure, adopt polymer repair mortar and alkali-resistant glass fiber net to consolidate the brickwork block jointly, simple process, wet work is few, do not need large-scale complicated machinery and the construction to occupy the place few, low cost, polymer mortar can improve the antidetonation bearing capacity of original structure, alkali-resistant glass fiber net has good ductility, can restrain the cracked production of brickwork block and further development, strengthen the durability of brickwork wall body, save the maintenance cost, polymer repair mortar can be fine dip in the inside of alkali-resistant glass fiber net, better and alkali-resistant glass fiber net collaborative work, it is effectual to consolidate.
In addition, the polymer repair mortar mainly takes inorganic materials as reinforcing materials, the materials are convenient and simple to obtain, the price is low, and by adding polyvinyl alcohol, the polyvinyl alcohol can be well combined with hydration products to form a three-dimensional grid structure consisting of polymer hydration products, so that the polymer repair mortar can play a role in reinforcing the ribs and improve the rigidity of the materials; the addition of the rubber powder is beneficial to improving the adhesive force of the polymer repair mortar, so that the polymer repair mortar can be bonded with the masonry block into a whole, and the polymer repair mortar is guaranteed not to be hollowly reinforced on the masonry block; the addition of the slag powder and the microbeads is favorable for improving the compressive strength and the flexural strength of the polymer mortar, and the microbeads are approximately spherical, so that the fluidity of the polymer mortar can be improved; the polymer repair mortar has the protection effect on the alkali-resistant glass fiber net and also achieves the aim of repairing and reinforcing.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are no specific structures which are objectively limitless due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the technical features mentioned above can be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention in other instances, which may or may not be practiced, are intended to be within the scope of the present application.
Claims (8)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110541626.3A CN113279597A (en) | 2021-05-18 | 2021-05-18 | Construction method of novel reinforced masonry structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110541626.3A CN113279597A (en) | 2021-05-18 | 2021-05-18 | Construction method of novel reinforced masonry structure |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2772089A1 (en) * | 2009-08-28 | 2011-03-03 | S & P Clever Reinforcement Company Ag | Reinforcing mesh for a reinforced mortar layer or sprayed mortar layer on an underlayment, and method for the installation thereof and reinforced mortar coating produced therewith |
| CN108301619A (en) * | 2018-02-08 | 2018-07-20 | 中国矿业大学 | A kind of construction method of the high ductility masonry wall of mortar joint screed enhancing |
| CN209163513U (en) * | 2018-11-01 | 2019-07-26 | 河北工业大学 | A kind of compound masonry using NSM-TRC reinforcing masonry structure |
| CN110145132A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | A kind of carbon fiber mesh is used for the reinforcement means of masonry structure |
| CN111003980A (en) * | 2019-11-25 | 2020-04-14 | 西安五和土木工程新材料有限公司 | High-ductility waterproof anti-cracking composite mortar and mixing method and construction process thereof |
-
2021
- 2021-05-18 CN CN202110541626.3A patent/CN113279597A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2772089A1 (en) * | 2009-08-28 | 2011-03-03 | S & P Clever Reinforcement Company Ag | Reinforcing mesh for a reinforced mortar layer or sprayed mortar layer on an underlayment, and method for the installation thereof and reinforced mortar coating produced therewith |
| CN108301619A (en) * | 2018-02-08 | 2018-07-20 | 中国矿业大学 | A kind of construction method of the high ductility masonry wall of mortar joint screed enhancing |
| CN209163513U (en) * | 2018-11-01 | 2019-07-26 | 河北工业大学 | A kind of compound masonry using NSM-TRC reinforcing masonry structure |
| CN110145132A (en) * | 2019-01-23 | 2019-08-20 | 卡本科技股份有限公司 | A kind of carbon fiber mesh is used for the reinforcement means of masonry structure |
| CN111003980A (en) * | 2019-11-25 | 2020-04-14 | 西安五和土木工程新材料有限公司 | High-ductility waterproof anti-cracking composite mortar and mixing method and construction process thereof |
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Application publication date: 20210820 |