CN110590291A - Method for repairing cracking of house wall - Google Patents
Method for repairing cracking of house wall Download PDFInfo
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- CN110590291A CN110590291A CN201911013702.2A CN201911013702A CN110590291A CN 110590291 A CN110590291 A CN 110590291A CN 201911013702 A CN201911013702 A CN 201911013702A CN 110590291 A CN110590291 A CN 110590291A
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- 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
- C04B28/04—Portland cements
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
Abstract
The invention discloses a house wall cracking repairing method, which comprises the following steps: s1, preprocessing a wall; s2, preparing repair mortar; s3, repairing cracks; s4, brushing a putty layer; the repair mortar comprises the following components in parts by mass: 15-18 parts of Portland cement; 7-10 parts of water; 8-10 parts of fly ash; 75-80 parts of sand; 7-10 parts of ethylene-vinyl acetate copolymer; 0.1-0.3 part of 4-phenoxypyridine; 1-2 parts of perylene-3, 4,9, 10-tetracarboxylic acid, and has the advantage that the repaired wall is not easy to crack again.
Description
Technical Field
The invention relates to the field of building decoration, in particular to a method for repairing cracking of a house wall.
Background
After the house is built, the foundation generally sinks. If the foundation subsides unevenly, subside big position and subside little position and take place relative displacement, can produce shear force and pulling force in the wall body, when this kind of additional internal force surpassed the tensile shear strength of wall body itself, the wall body of house can produce the crack, and simultaneously, the crack of wall body still can increase along with the increase of the uneven settlement of foundation. Therefore, it is very important to repair cracks in the walls of houses.
The existing repairing method is generally to fill repairing mortar in the crack of the wall, but the existing repairing mortar has weak bonding force with the original wall, and the repairing mortar is easy to separate from the wall after being formed, so that the wall is easy to crack again, and therefore, the existing repairing method still has room for improvement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a house wall cracking repairing method which has the advantage that the repaired wall is not easy to crack again.
In order to achieve the purpose, the invention provides the following technical scheme:
a house wall cracking repairing method comprises the following steps:
s1, wall pretreatment: brushing off a putty layer on the surface layer of the wall body to expose concrete aggregate of the original wall body and cleaning the crack surface of the wall body;
s2, preparing repair mortar: uniformly mixing and stirring all components of the repair mortar according to the mass part ratio to form the repair mortar;
s3, crack repairing: injecting repair mortar into the crack at high pressure, and leveling the repair mortar on the surface of the wall;
s4, brushing a putty layer: after the repaired mortar is formed, painting putty layer coating on the surface of the wall again to form a putty layer;
the repair mortar comprises the following components in parts by weight:
15-18 parts of Portland cement;
7-10 parts of water;
8-10 parts of fly ash;
75-80 parts of sand;
7-10 parts of ethylene-vinyl acetate copolymer;
0.1-0.3 part of 4-phenoxypyridine;
1-2 parts of perylene-3, 4,9, 10-tetracarboxylic acid.
By adopting the technical scheme, the ethylene-vinyl acetate copolymer, the 4-phenoxypyridine and the perylene-3, 4,9, 10-tetracarboxylic acid are compounded for use, so that the tensile bonding strength of the repair mortar is favorably enhanced, the repair mortar is more difficult to separate from the original wall body after construction, meanwhile, the flexibility of the repair mortar is favorably enhanced, the wall body is more difficult to crack again when the wall body is under the action of uneven settlement of a foundation, and the repair effect of the repair mortar is better; in addition, the compressive strength of the repair mortar is favorably enhanced, so that the repair mortar is not easy to crack when being stressed, the wall is not easy to crack again, and the repair effect of the repair mortar is favorably improved.
The invention is further configured to: the sand is formed by mixing continuous graded sand with the grain diameter of 0.1-0.5mm, continuous graded sand with the grain diameter of 0.5-1.2mm, continuous graded sand with the grain diameter of 1.2-2.5mm and continuous graded sand with the grain diameter of 2.5-5.0mm according to the mass ratio of 3:2:2: 3.
By adopting the technical scheme, the aggregate in the repair mortar is better accumulated intensively by controlling the particle size of the aggregate in the repair mortar and controlling the using amount of the sand with different particle sizes, so that the compactness of the repair mortar is improved, the compressive strength of the repair mortar is favorably enhanced, the repair mortar is less prone to cracking when being subjected to pressure, and the wall is less prone to secondary cracking.
The invention is further configured to: the repair mortar also comprises the following components in parts by mass:
0.2 to 0.4 portion of Chinese salamander extract;
0.5-1 part of citric acid.
By adopting the technical scheme, the Chinese salamander extract and the citric acid are added to be matched with each other in a synergistic manner, so that the consistency of the repair mortar is favorably improved, the repair mortar is more difficult to sag in the construction process, the repair mortar is more easy to bond firmly with the original wall body, the construction effect of the repair mortar is better, and the wall body is difficult to crack again.
The invention is further configured to: the repair mortar also comprises the following components in parts by mass:
3-5 parts of flaxseed.
By adopting the technical scheme, the flax seed is added, so that the flexibility and the compressive strength of the repair mortar are enhanced, the wall is not cracked easily under the action of uneven settlement of a foundation, the construction effect of the repair mortar is improved, and the wall is not cracked easily.
The invention is further configured to: the repair mortar also comprises the following components in parts by mass:
0.3-0.5 part of platycladi seed.
By adopting the technical scheme, the added platycladi seeds and the flaxseeds are mutually cooperated, so that the flexibility and the compressive strength of the repair mortar are favorably and better enhanced, the wall is not easy to crack under the action of the uneven settlement of the foundation, the construction effect of the repair mortar is favorably enhanced, and the wall is not easy to crack again.
The invention is further configured to: the repair mortar also comprises the following components in parts by mass:
1-2 parts of waste rubber particles.
By adopting the technical scheme, the flexibility of the repair mortar is favorably enhanced by adding the waste rubber particles, so that the repair mortar is less prone to cracking under the uneven settlement action of the foundation, the construction effect of the repair mortar is favorably enhanced, and the wall is less prone to secondary cracking; meanwhile, the method is favorable for improving the utilization rate of waste resources and fully utilizing the resources.
The invention is further configured to: the repair mortar comprises the following components in parts by mass:
0.3-0.5 part of cross-linking agent.
By adopting the technical scheme, the cross-linking agent is added, so that the waste rubber particles can be better and uniformly dispersed in the repair mortar and can be integrated with the repair mortar, the waste rubber can be better and deeply inserted into the repair mortar to better improve the flexibility of the repair mortar, the repair mortar is not easy to crack when being subjected to the uneven settlement action of a foundation, the construction effect of the repair mortar can be improved, and the wall body is not easy to crack again.
The invention is further configured to: the repair mortar also comprises the following components in parts by mass:
0.1-0.2 part of crosslinking assistant.
By adopting the technical scheme, the crosslinking auxiliary agent is added, so that the crosslinking of the waste rubber particles is promoted, the waste rubber is easier to uniformly disperse and extends into the repair mortar, the flexibility of the repair mortar is better improved, the repair mortar is less prone to cracking under the action of uneven settlement of a foundation, the construction effect of the repair mortar is improved, and the wall is less prone to secondary cracking.
The invention is further configured to: the crosslinking assistant is zinc oxide.
By adopting the technical scheme, zinc oxide is used as a crosslinking assistant, so that the crosslinking temperature of the waste rubber particles is favorably reduced, the crosslinking of the waste rubber particles is easier to perform, the crosslinking process of the waste rubber particles is favorably controlled, the waste rubber particles are easier to uniformly disperse and go deep into the repair mortar, the flexibility of the repair mortar is higher, the construction effect of the repair mortar is favorably improved, and the wall is less prone to secondary cracking.
The invention is further configured to: the repair mortar also comprises the following components in parts by mass:
0.5-1 part of hazelnut shell powder.
By adopting the technical scheme, the hazelnut shell powder is added, so that the compressive strength of the repair mortar is favorably enhanced, the repair mortar is less prone to cracking, the construction effect of the repair mortar is favorably improved, and the wall is less prone to secondary cracking.
In conclusion, the invention has the following beneficial effects:
1. by adopting the ethylene-vinyl acetate copolymer, the 4-phenoxypyridine and the perylene-3, 4,9, 10-tetracarboxylic acid for compounding, the tensile bonding strength of the repair mortar is favorably enhanced, so that the repair mortar is more difficult to separate from the original wall after construction, and the construction effect of the repair mortar is favorably improved;
2. by adopting the ethylene-vinyl acetate copolymer, the 4-phenoxypyridine and the perylene-3, 4,9, 10-tetracarboxylic acid for compounding, the flexibility of the repair mortar is favorably enhanced, so that the wall is less prone to cracking again when the wall is under the action of uneven settlement of a foundation;
3. by adopting the ethylene-vinyl acetate copolymer, the 4-phenoxypyridine and the perylene-3, 4,9, 10-tetracarboxylic acid for compounding, the compressive strength of the repair mortar is favorably enhanced, so that the repair mortar is less prone to cracking under pressure, and the wall is less prone to cracking again.
Drawings
FIG. 1 is a process flow diagram of the method for repairing the cracking of the house wall according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In the following examples, Portland cement of P.O42.5R type manufactured by Yanxin Yonggang group Co., Ltd was used.
In the following examples, class II fly ash from a Baifeng mineral processing plant, Lingshu county, was used as the fly ash.
In the following examples, river sand from Shijiazhuan Xinsheng mineral products Co.
In the following examples, an ethylene-vinyl acetate copolymer having a designation of 53007 manufactured by Nojin plastics Co., Ltd, of Dongguan was used as the ethylene-vinyl acetate copolymer.
In the following examples, 4-phenoxypyridine was obtained from Shanghai-derived leaf Biotech Co., Ltd under the trade name S65780-5 g.
As perylene-3, 4,9, 10-tetracarboxylic acid, perylene-3, 4,9, 10-tetracarboxylic acid from Ex chemical Co., Ltd. of Zheng, was used in the following examples.
In the following examples, the extract of salacia is the extract of salacia of shandong heidun new materials limited.
In the following examples, citric acid from Baiyurt chemical company, Ohio is used.
In the following examples, the flaxseed used is the 042 flaxseed from Shandong cereal food Co.
In the following examples, arborvitae seed, named as "arborvitae seed" of 01 from Jiuxin pharmaceutical Co., Ltd, Bozhou city, is used.
In the following examples, a rubber crosslinking agent of Winzhou Gray chemical Co., Ltd is used as the crosslinking agent.
In the following examples, zinc oxide from Yangzhou De Metal technology, Inc. was used as the crosslinking assistant.
In the following examples, hazelnut shell powder from Shaanxi Senfu Natural products Co., Ltd is used.
In the following examples, the putty layer coating of Qingdao Huaxiu coating Co., Ltd was used.
Example 1
A house wall cracking repairing method comprises the following steps:
s1, preprocessing the wall, specifically as follows:
brushing off a putty layer on the surface layer of the wall body, exposing concrete aggregate of the original wall body, cleaning up dust and impurities on the surface of a crack of the wall body, and drying the surface of the crack of the wall body by using a blower to dry the surface of the crack.
S2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at normal temperature, adding 4.25kg of water, 8kg of fly ash and 75kg of sand while stirring, stirring uniformly, adding 18kg of Portland cement, 4.25kg of water, 10kg of ethylene-vinyl acetate copolymer, 0.2kg of 4-phenoxypyridine and 2kg of perylene-3, 4,9, 10-tetracarboxylic acid while stirring uniformly, and obtaining the repair mortar.
Wherein the sand is prepared by uniformly mixing 15kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 22.5kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 15kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 22.5kg of continuous graded sand with the grain diameter of 2.5-5 mm.
S3, repairing the crack, specifically comprising the following steps:
and (3) injecting the repair mortar prepared in the step (S2) into the crack at high pressure by using a high-pressure grouting machine, and leveling the repair mortar on the surface of the wall body to enable the surface of the wall body to be flat.
S4, brushing the putty layer, which comprises the following specific steps:
and after the repair mortar is finally set and formed, painting a putty layer coating on the surface of the wall again to form a putty layer.
Example 2
The difference from example 1 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at the normal temperature, adding 5kg of water, 9kg of fly ash and 77.5kg of sand while stirring, stirring uniformly, adding 16.5kg of portland cement, 5kg of water, 7kg of ethylene-vinyl acetate copolymer, 0.1kg of 4-phenoxypyridine, 1.5kg of perylene-3, 4,9, 10-tetracarboxylic acid while stirring uniformly, and stirring uniformly to obtain the repair mortar.
Wherein the sand is prepared by uniformly mixing 15.5kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 23.25kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 15.5kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 23.25kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 3
The difference from example 1 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at normal temperature, adding 3.5kg of water, 10kg of fly ash and 80kg of sand while stirring, stirring uniformly, adding 15kg of Portland cement, 3.5kg of water, 8.5kg of ethylene-vinyl acetate copolymer, 0.3kg of 4-phenoxypyridine and 1kg of perylene-3, 4,9, 10-tetracarboxylic acid while stirring uniformly, and obtaining the repair mortar.
Wherein the sand is prepared by uniformly mixing 16kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 24kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 16kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 24kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 4
The difference from example 1 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at normal temperature, adding 4kg of water, 9.5kg of fly ash and 78kg of sand while stirring, stirring uniformly, adding 17kg of Portland cement, 4kg of water, 8kg of ethylene-vinyl acetate copolymer, 0.1kg of 4-phenoxypyridine and 1.1kg of perylene-3, 4,9, 10-tetracarboxylic acid while stirring uniformly, and obtaining the repair mortar.
Wherein, the sand is formed by evenly mixing 15.6kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 23.4kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 15.6kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 23.4kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 5
The difference from example 4 is that: the sand is prepared by uniformly mixing 31.2kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 7.8kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 15.6kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 23.4kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 6
The difference from example 4 is that: the sand is prepared by uniformly mixing 23.4kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 15.6kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 23.4kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 15.6kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 7
The difference from example 4 is that: the sand is prepared by uniformly mixing 23.4kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 15.6kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 7.8kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 31.2kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 8
The difference from example 4 is that: the sand is prepared by uniformly mixing 23.4kg of continuous graded sand with the grain diameter of 0.1-0.5mm, 15.6kg of continuous graded sand with the grain diameter of 0.5-1.2mm, 15.6kg of continuous graded sand with the grain diameter of 1.2-2.5mm and 23.4kg of continuous graded sand with the grain diameter of 2.5-5 mm.
Example 9
The difference from example 8 is that: in step S2, while adding Portland cement, the remaining water, ethylene-vinyl acetate copolymer, 4-phenoxypyridine, perylene-3, 4,9, 10-tetracarboxylic acid, 0.2kg of salamander extract and 1kg of citric acid are added.
Example 10
The difference from example 8 is that: in step S2, while adding Portland cement, the remaining water, ethylene-vinyl acetate copolymer, 4-phenoxypyridine, perylene-3, 4,9, 10-tetracarboxylic acid, 0.4kg of salamander extract and 0.5kg of citric acid are added.
Example 11
The difference from example 10 is that: in step S2, the component herba Agrimoniae extract is added less.
Example 12
The difference from example 10 is that: in step S2, citric acid is added as a minor component.
Example 13
The difference from example 8 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at the normal temperature, adding 4kg of water, 9.5kg of fly ash and 78kg of sand while stirring, uniformly stirring, adding 17kg of portland cement, 4kg of water, 8kg of ethylene-vinyl acetate copolymer, 0.1kg of 4-phenoxypyridine, 1.1kg of perylene-3, 4,9, 10-tetracarboxylic acid, 0.2kg of salamander extract, 0.5kg of citric acid, 4kg of linseed, 0.4kg of platycladi seed and 1kg of hazelnut shell powder while stirring, raising the temperature to 120 ℃ after uniformly stirring, adding 1.5kg of waste rubber particles, 0.4kg of cross-linking agent and 0.2kg of cross-linking assistant while stirring, and finally stirring under the natural condition until the temperature in the stirring kettle is reduced to the room temperature, thereby obtaining the repair mortar.
Example 14
The difference from example 8 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at the normal temperature, adding 4kg of water, 9.5kg of fly ash and 78kg of sand while stirring, uniformly stirring, adding 17kg of portland cement, 4kg of water, 8kg of ethylene-vinyl acetate copolymer, 0.1kg of 4-phenoxypyridine, 1.1kg of perylene-3, 4,9, 10-tetracarboxylic acid, 0.3kg of salamander extract, 0.75kg of citric acid, 5kg of flaxseed, 0.3kg of platycladi seed and 0.5kg of hazelnut shell powder while stirring, raising the temperature to 120 ℃ after uniformly stirring, adding 1kg of waste rubber particles, 0.3kg of cross-linking agent and 0.15kg of cross-linking assistant while stirring, and finally stirring under the natural condition until the temperature in the stirring kettle is reduced to the room temperature to obtain the repair mortar.
Example 15
The difference from example 8 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a 150L stirring kettle at the normal temperature, adding 4kg of water, 9.5kg of fly ash and 78kg of sand while stirring, uniformly stirring, adding 17kg of portland cement, 4kg of water, 8kg of ethylene-vinyl acetate copolymer, 0.1kg of 4-phenoxypyridine, 1.1kg of perylene-3, 4,9, 10-tetracarboxylic acid, 0.4kg of salamander extract, 1kg of citric acid, 3kg of flaxseed, 0.5kg of platycladi seed and 0.75kg of hazelnut shell powder while stirring, raising the temperature to 120 ℃ after uniformly stirring, adding 2kg of waste rubber particles, 0.5kg of cross-linking agent and 0.1kg of cross-linking assistant while stirring, and finally stirring under the natural condition until the temperature in the stirring kettle is reduced to the room temperature, thereby obtaining the repair mortar.
Example 16
The difference from example 8 is that:
s2, preparing the repair mortar, which comprises the following steps:
stirring at the rotating speed of 240r/min in a stirring kettle of 150L at the normal temperature, adding 4kg of water, 9.5kg of fly ash and 78kg of sand while stirring, uniformly stirring, adding 17kg of portland cement, 4kg of water, 8kg of ethylene-vinyl acetate copolymer, 0.1kg of 4-phenoxypyridine, 1.1kg of perylene-3, 4,9, 10-tetracarboxylic acid, 0.35kg of salamander extract, 0.6kg of citric acid, 4.5kg of flaxseed, 0.35kg of shelled cedar seed and 0.6kg of hazelnut shell powder while stirring, raising the temperature to 120 ℃ after uniformly stirring, adding 1.3kg of waste rubber particles, 0.45kg of cross-linking agent and 0.11kg of cross-linking assistant while stirring, and finally stirring until the temperature in the stirring kettle is reduced to the room temperature under the natural condition to obtain the repair mortar.
Comparative example 1
The difference from example 8 is that: in step S2, ethylene-vinyl acetate copolymer, 4-phenoxypyridine and perylene-3, 4,9, 10-tetracarboxylic acid are less added.
Comparative example 2
The difference from example 8 is that: in step S2, a small amount of ethylene-vinyl acetate copolymer is added.
Comparative example 3
The difference from example 8 is that: in step S2, the component 4-phenoxypyridine is added in a small amount.
Comparative example 4
The difference from example 8 is that: in step S2, perylene-3, 4,9, 10-tetracarboxylic acid is added in small amount.
Experiment 1
The cracking of the wall bodies repaired by the above examples and comparative examples after 1 year was observed and recorded.
Experiment 2
The tensile bond strength (MPa) of the repair mortar prepared in the above examples and comparative example, step S2, was measured according to the regulations of JGJ/T70-2009 "standards for basic performance test methods for building mortar", and curing was performed with reference to the regulations of JC/T907-2002 "concrete interface treating agent".
Experiment 3
The transverse deformation force (mm) of the repair mortar prepared in the above examples and comparative example step S2 was tested according to appendix A in JC/T1004-2006 ceramic wall and floor tile grout.
Experiment 4
The folding ratios of the repair mortars prepared in the steps S2 of the above examples and comparative examples were tested according to the performance indexes of the surface mortar in Table 6 in GB/T29906-2013 molded polyphenyl board thin plastered exterior wall external thermal insulation system material.
Experiment 5
The 28d compressive strength (MPa) of the repair mortar prepared in the above examples and comparative example, step S2, was tested according to the relevant provisions of GB/T17671-1999 "Cement mortar Strength test method".
The data from the above experiments are shown in Table 1.
TABLE 1
According to the comparison of the data of the examples 1 to 4 in the table 1, the components are better cooperated with each other by controlling the amount of the components in the repair mortar, so that the flexibility and the tensile bonding strength of the repair mortar are enhanced, and the compressive strength of the repair mortar is enhanced, so that the repair mortar is less prone to cracking when being subjected to the uneven settlement of the foundation.
According to the comparison of the data of the examples 4 to 8 in the table 1, the aggregate in the repair mortar is favorably and better densely accumulated by controlling the grain diameter of the sand in the repair mortar and the use amount of the sand with different grain diameters, so that the compactness in the repair mortar is higher, the compressive strength of the repair mortar is favorably enhanced, and the repair mortar is less prone to cracking; meanwhile, the thickness of the repair mortar is favorably enhanced, so that the tensile bonding strength of the repair mortar is stronger, and the wall is less prone to cracking.
According to the comparison of the data of examples 8-10 in table 1, the addition of the salamander extract in synergistic combination with the citric acid is beneficial to enhancing the flexibility and tensile bonding strength of the repair mortar, and simultaneously, is beneficial to enhancing the compressive strength of the repair mortar, so that the repair mortar is less prone to cracking when subjected to uneven settlement of the foundation.
According to the comparison of the data of examples 9-12 in Table 1, the flexibility, tensile bond strength and compressive strength of the repair mortar are improved only when the extract of Agrimonia pilosa and citric acid are synergistically combined with each other, so that the repair mortar is less likely to crack when subjected to uneven settlement of the foundation.
According to the comparison of the data of example 10 and examples 13-15 in table 1, the addition of linseed, platycladi seed, waste rubber particles, cross-linking agent, cross-linking aid and hazelnut shell powder is beneficial to enhancing the flexibility, tensile bond strength and compressive strength of the repair mortar, so that the repair mortar is less prone to cracking when subjected to uneven settlement of the foundation.
According to the comparison of the data of examples 13-16 in table 1, the control of the addition amounts of linseed, platycladi seed, waste rubber particles, cross-linking agent, cross-linking aid and hazelnut shell powder is beneficial to enhance the flexibility, tensile bond strength and compressive strength of the repair mortar to a certain extent, so that the repair mortar is less prone to cracking when subjected to uneven settlement of the foundation.
According to the comparison of the data of example 8 and comparative examples 1-4 in table 1, the ethylene-vinyl acetate copolymer, 4-phenoxypyridine and perylene-3, 4,9, 10-tetracarboxylic acid can better improve the flexibility, tensile bond strength and compressive strength of the repair mortar only when they are synergistically matched with each other, and the absence of any component can easily affect the properties of the repair mortar, such as the flexibility, tensile bond strength and compressive strength.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A house wall cracking repairing method is characterized by comprising the following steps: the method comprises the following steps:
s1, wall pretreatment: brushing off a putty layer on the surface layer of the wall body to expose concrete aggregate of the original wall body and cleaning the crack surface of the wall body;
s2, preparing repair mortar: uniformly mixing and stirring all components of the repair mortar according to the mass part ratio to form the repair mortar;
s3, crack repairing: injecting repair mortar into the crack at high pressure, and leveling the repair mortar on the surface of the wall;
s4, brushing a putty layer: after the repaired mortar is formed, painting putty layer coating on the surface of the wall again to form a putty layer;
the repair mortar comprises the following components in parts by weight:
15-18 parts of Portland cement;
7-10 parts of water;
8-10 parts of fly ash;
75-80 parts of sand;
7-10 parts of ethylene-vinyl acetate copolymer;
0.1-0.3 part of 4-phenoxypyridine;
1-2 parts of perylene-3, 4,9, 10-tetracarboxylic acid.
2. The house wall cracking repair method of claim 1, wherein: the sand is prepared by uniformly mixing continuous graded sand with the grain diameter of 0.1-0.5mm, continuous graded sand with the grain diameter of 0.5-1.2mm, continuous graded sand with the grain diameter of 1.2-2.5mm and continuous graded sand with the grain diameter of 2.5-5.0mm in a mass ratio of 3:2:2: 3.
3. The house wall cracking repair method according to claim 1-2, characterized in that: the repair mortar also comprises the following components in parts by mass:
0.2 to 0.4 portion of Chinese salamander extract;
0.5-1 part of citric acid.
4. The house wall cracking repair method according to any one of claims 1-2, characterized in that: the repair mortar also comprises the following components in parts by mass:
3-5 parts of flaxseed.
5. The house wall cracking repair method of claim 4, wherein: the repair mortar also comprises the following components in parts by mass:
0.3-0.5 part of platycladi seed.
6. The house wall cracking repair method according to any one of claims 1-2, characterized in that: the repair mortar also comprises the following components in parts by mass:
1-2 parts of waste rubber particles.
7. The house wall cracking repair method of claim 6, wherein: the repair mortar comprises the following components in parts by mass:
0.3-0.5 part of cross-linking agent.
8. The house wall cracking repair method of claim 7, wherein: the repair mortar also comprises the following components in parts by mass:
0.1-0.2 part of crosslinking assistant.
9. The method for repairing the crack of the house wall as claimed in claim 8, wherein the crosslinking assistant is zinc oxide.
10. The house wall cracking repair method according to any one of claims 1-2, characterized in that: the repair mortar also comprises the following components in parts by mass:
0.5-1 part of hazelnut shell powder.
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| CN112745076A (en) * | 2021-01-06 | 2021-05-04 | 北京市高强混凝土有限责任公司 | Concrete doped with dolomite powder and preparation method thereof |
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Application publication date: 20191220 |