CN111205027A - Waterproof anti-crack mortar composition - Google Patents
Waterproof anti-crack mortar composition Download PDFInfo
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- CN111205027A CN111205027A CN202010137445.XA CN202010137445A CN111205027A CN 111205027 A CN111205027 A CN 111205027A CN 202010137445 A CN202010137445 A CN 202010137445A CN 111205027 A CN111205027 A CN 111205027A
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- mortar
- mortar composition
- methyl cellulose
- hydroxypropyl methyl
- cement
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Classifications
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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
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
Abstract
A waterproof anti-crack mortar composition. The method specifically comprises the following steps: the composition consists of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, segmented fiber, starch ether and redispersible rubber powder. In the invention, hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder are used as auxiliary materials for improving the comprehensive performance of the mortar, so that the mortar has remarkable waterproof, anti-cracking and anti-dropping effects, and the service life of the mortar is more than 3 times that of the conventional mortar. The invention not only reduces the construction amount, improves the construction efficiency and reduces the labor cost, but also greatly reduces the cost. Meanwhile, the product is simple to use, can be used by adding a proper amount of water during application and then uniformly stirring, is convenient and quick, is an ideal novel building material, and is very worthy of great popularization.
Description
Technical Field
The invention belongs to the new technical field of building material production, and particularly relates to a waterproof anti-crack mortar composition.
Background
Mortar is a bonding substance used for building bricks on buildings, and is formed by adding water into sand and cementing materials (cement, lime paste, clay and the like) according to a certain proportion, and is also called mortar and also used as mortar.
The mortar is usually made of cement mortar, mixed mortar (or cement lime mortar), lime mortar and clay mortar, according to the composition materials, the common mortar can be further divided into ① lime mortar, ② cement mortar, ③ mixed mortar, wherein the cement mortar is made of lime paste, sand and water according to a certain proportion and is generally used for masonry, wall surfaces or floors in humid environment or water, and the like, and the ③ mixed mortar is made by adding proper admixture such as fly ash, diatomite and the like into the cement or lime mortar to save the using amount of the cement or lime and improve the workability of the mortar.
The prior mortar generally has the defects of no water resistance, easy cracking and the like. For example, when the traditional mortar is applied to brickwork, the wall surface is easy to crack or permeate water; when the traditional mortar is applied to decorative and plastering surfaces, the mortar is not waterproof, cracks immediately after the mortar is completely dried after plastering, and naturally falls off after 3 to 5 years.
Disclosure of Invention
The invention aims to overcome the defects of the existing mortar and provide a brand-new waterproof anti-crack mortar composition. The method specifically comprises the following steps: the composition consists of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, segmented fiber, starch ether and redispersible rubber powder.
The quartz sand is quartz particles formed by crushing and processing quartz stones. Quartz is a nonmetallic mineral, is a hard, wear-resistant, chemically stable silicate mineral, and has the main mineral component of SiO 2. Quartz sand is an important industrial mineral raw material and a non-chemical hazardous article, and is widely used in the industries of glass, casting, ceramics and fireproof materials, ferrosilicon smelting, metallurgical flux, metallurgy, building, chemical engineering, plastics, rubber, grinding materials, filter materials and the like.
The hydroxypropyl methylcellulose, also known as hydroxypropyl methylcellulose and cellulose hydroxypropyl methyl ether, is prepared by selecting high-purity cotton cellulose as a raw material and performing special etherification under an alkaline condition. Hydroxypropyl methylcellulose can be used as a water-retaining agent and a retarder of cement mortar in the construction industry, so that the mortar has pumpability. The coating mortar, the gypsum material, the putty powder or other building materials are used as an adhesive to improve the coating property and prolong the operable time. The water retention property of the hydroxypropyl methyl cellulose HPMC enables the sizing agent not to crack because of drying too fast after being coated, and enhances the strength after hardening. Meanwhile, when the water-based epoxy resin is applied to cement mortar, the dispersibility of cement-sand can be improved, the plasticity and the water-retaining property of the mortar are greatly improved, the effect of preventing cracks is achieved, and the cement strength can be enhanced.
The anti-cracking fiber is prepared by adopting pure polypropylene as a raw material, is three-dimensionally and disorderly distributed in mortar and cement concrete in a good dispersibility manner, and has a strong pulling and adhering effect in the concrete or the mortar due to the outstanding tensile strength, so that the anti-cracking and anti-seepage effects are achieved. The cracks of mortar and cement concrete are caused by structural deformation cracks and no-load deformation cracks, and the structural deformation cracks are divided into cracks caused by external load, cracks caused by foundation deformation, roadbed deformation and bridge foundation deformation (differential settlement and differential expansion) and cracks caused by structural temperature difference; the no-load deformation cracks are classified into shrinkage cracks, plastic cracks, concrete corrosion cracks, reinforcement corrosion cracks in concrete, alkali-aggregate reaction cracks, shear cracks caused by vibration fatigue and inertial vibration. The anti-cracking fiber acts on the mortar and the cement concrete, can obviously improve the brittleness of the cement concrete and the mortar and enhance the continuity and uniformity of concrete and mortar material media by virtue of the unique properties of tensile strength, dispersibility, melting point ignition point, acid and alkali resistance and the like, can effectively reduce the cracking of the concrete and the mortar, and can be widely applied to waterproof and anti-seepage engineering of the concrete and the mortar.
The etherified starch is starch substituent ether generated by the reaction of hydroxyl in starch molecule and reactive substance, and comprises hydroxyalkyl starch, carboxymethyl starch, cationic starch, etc. The water-retaining agent has very good quick thickening capability and higher water-retaining property; the dosage is small, and very high effect can be achieved by very low addition amount; the anti-sagging capability of the material is improved; has good lubricity, and can improve the operation performance of the material and make the operation smoother. The starch ether has good compatibility with other building and additives, and is particularly suitable for building dry mixes such as mortar, adhesives, plastering and rolling mixes. And has the characteristics of improving the anti-sagging property, improving the construction property, improving the yield of mortar and the like.
The redispersible latex powder is water-soluble redispersible powder which is divided into ethylene/vinyl acetate copolymer, vinyl acetate/vinyl versatate copolymer, acrylic acid copolymer and the like, and is prepared into a powder adhesive after spray drying, and polyvinyl alcohol is used as a protective colloid. The powder can be quickly redispersed into emulsion after contacting with water, and the redispersible emulsion powder has high binding capacity and unique properties, such as: water resistance, workability, heat insulation, and the like, and thus their application range is extremely wide. The mortar has outstanding bonding strength, improves the flexibility of the mortar, has longer opening time, gives the mortar excellent alkali resistance, improves the adhesive bonding property, the breaking strength, the waterproofness, the plasticity, the wear resistance and the constructability of the mortar, and has stronger flexibility in the flexible anti-crack mortar. The wet mortar has the advantages of improving the construction performance, improving the flow performance, increasing the thixotropy and the sag resistance, improving the cohesion, prolonging the opening time and enhancing the water retention; after the mortar is cured, the tensile strength is improved, the bending strength is increased, the elastic modulus is reduced, the deformability is improved, the material compactness is increased, the wear-resisting strength is increased, the cohesive strength is improved, the carbonization depth is reduced, the water absorption of the material is reduced, and the material has the advantages of excellent water increasing property and the like.
The invention is realized by the following technical scheme:
1. the technical scheme of the waterproof anti-crack mortar composition is as follows: the composition consists of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder.
2. The technical scheme of the waterproof anti-crack mortar composition is as follows: the specification of quartz sand collection is 50-100 meshes, preferably 60-80 meshes.
3. The technical scheme of the waterproof anti-crack mortar composition is as follows: the viscosity of the hydroxypropyl methylcellulose is over 15 ten thousand, and the optimal viscosity is over 25 ten thousand.
4. The technical scheme of the waterproof anti-crack mortar composition is as follows: the anti-cracking fiber collection specification is 3-10 mm, and the best is 6 mm.
5. The technical scheme is that the waterproof anti-crack mortar composition comprises the following components in parts by weight: firstly, 50-70% of quartz sand, 20-30% of cement and 10-20% of light calcium carbonate are combined into one ton of raw material, and then 6-10 kg of hydroxypropyl methyl cellulose, 10-20 kg of anti-cracking fiber, 0.5-1.5 kg of starch ether and 2-5 kg of redispersible rubber powder are added into the one ton of raw material.
6. The technical scheme is that the preparation method of the finished mortar composition comprises the following steps:
(1) large material combination: firstly, putting quartz sand, cement and light calcium carbonate into a stirrer according to the amount, and uniformly stirring to obtain a large-material raw material;
(2) mixing raw materials: continuously adding hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder into the large material raw materials according to the amount, and then stirring for 30-50 minutes to uniformly mix all the raw materials to obtain a finished product raw material;
(3) and (3) finished product: and subpackaging the finished raw materials into packaging bags according to the amount to obtain the finished mortar composition.
The invention has the following advantages:
1. the preparation method of the waterproof anti-crack mortar provided by the invention has the advantages of novel conception, simple production process and easy implementation.
2. In the invention, the quartz sand is used as a main carrier, and the quartz sand is a hard, wear-resistant and chemically stable silicate mineral, so that the stability of the mortar performance is ensured.
3. In the invention, hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder are used as auxiliary materials for improving the comprehensive performance of the mortar, and the hydroxypropyl methyl cellulose can improve the dispersibility of the mortar, greatly improve the plasticity and water retention of the mortar, prevent cracks and enhance the strength of cement; the anti-cracking fiber can obviously improve the brittleness of the mortar, strengthen the continuity and uniformity of a mortar material medium and effectively reduce the cracking of the mortar by virtue of the unique properties of tensile strength, dispersibility, melting point ignition point, acid and alkali resistance and the like; the starch ether has very good quick thickening capacity and higher water-retaining property, can improve the self anti-sagging capacity of the material, can improve the operating performance of the material, and enables the operation to be smoother, thereby improving the constructability and the mortar yield; the redispersible latex powder has outstanding bonding strength, improves the flexibility of mortar, endows the mortar with excellent alkali resistance, improves the adhesiveness, the breaking strength, the water resistance, the plasticity and the wear resistance of the mortar, and simultaneously has the advantages of improving the construction performance, the flowing performance, the thixotropy and the sagging resistance, improving the cohesive force, prolonging the opening time, enhancing the water retention property and the like. Therefore, the mortar has remarkable waterproof, anti-cracking and anti-falling effects, and the service life of the mortar is more than 3 times that of the traditional mortar.
4. In the application process of the traditional mortar, such as the application of decorative finishing, the coating needs 3-4 centimeters, and the cost needs 14-18 yuan/square. When the invention is used, only 1-1.5 cm of wiping is needed, and the cost needs 10-12 yuan/square; if the mortar is applied to brickwork, the traditional mortar with the thickness of 3-4 cm needs to be put, but the mortar with the thickness of 1-1.5 cm only needs to be smeared when the mortar is used; therefore, the invention not only reduces the construction amount, improves the construction efficiency and reduces the labor cost, but also greatly reduces the cost.
5. The invention has simple production process and simple product use, can be used by adding a proper amount of water and then uniformly stirring, is convenient and quick, is an ideal novel building material and is very worthy of great popularization.
Detailed Description
The process of the present invention is further illustrated below with reference to examples.
1. The technical scheme of the waterproof anti-crack mortar composition is as follows: the composition consists of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder.
2. The technical scheme of the waterproof anti-crack mortar composition is as follows: the specification of quartz sand collection is 50-100 meshes, preferably 60-80 meshes.
3. The technical scheme of the waterproof anti-crack mortar composition is as follows: the viscosity of the hydroxypropyl methylcellulose is over 15 ten thousand, and the optimal viscosity is over 25 ten thousand.
4. The technical scheme of the waterproof anti-crack mortar composition is as follows: the anti-cracking fiber collection specification is 3-10 mm, and the best is 6 mm.
5. The technical scheme is that the waterproof anti-crack mortar composition comprises the following components in parts by weight: firstly, 50-70% of quartz sand, 20-30% of cement and 10-20% of light calcium carbonate are combined into one ton of raw material, and then 6-10 kg of hydroxypropyl methyl cellulose, 10-20 kg of anti-cracking fiber, 0.5-1.5 kg of starch ether and 2-5 kg of redispersible rubber powder are added into the one ton of raw material.
6. The technical scheme is that the preparation method of the finished mortar composition comprises the following steps:
(1) large material combination: firstly, putting quartz sand, cement and light calcium carbonate into a stirrer according to the amount, and uniformly stirring to obtain a large-material raw material;
(2) mixing raw materials: continuously adding hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder into the large material raw materials according to the amount, and then stirring for 30-50 minutes to uniformly mix all the raw materials to obtain a finished product raw material;
(3) and (3) finished product: and subpackaging the finished raw materials into packaging bags according to the amount to obtain the finished mortar composition.
Specific example 1:
a waterproof anti-crack mortar composition is composed of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, anti-crack fiber, starch ether and redispersible rubber powder. Wherein the collection specification of the quartz sand is 60 meshes; the viscosity of the hydroxypropyl methyl cellulose is over 25 ten thousand; the specification of the crack resistant fiber acquisition is 6 mm.
The composition comprises the following components in percentage by weight: firstly, 60% of quartz sand, 25% of cement and 15% of light calcium carbonate are combined into one ton of raw material, and then 8 kg of hydroxypropyl methyl cellulose, 15 kg of anti-cracking fiber, 1 kg of starch ether and 3 kg of redispersible rubber powder are added into the one ton of raw material.
The preparation method of the finished mortar composition comprises the following steps:
1. large material combination: firstly, putting quartz sand, cement and light calcium carbonate into a stirrer according to the amount, and stirring the mixture uniformly to obtain a large-material raw material;
2. mixing raw materials: continuously adding hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder into the large material raw materials according to the amount, and then stirring for 45 minutes to uniformly mix all the raw materials to obtain a finished product raw material;
3. and (3) finished product: and subpackaging the finished raw materials into packaging bags according to the amount to obtain the finished mortar composition.
Specific example 2:
a waterproof anti-crack mortar composition is composed of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, anti-crack fiber, starch ether and redispersible rubber powder. Wherein the collection specification of the quartz sand is 80 meshes; the viscosity of the hydroxypropyl methyl cellulose is over 25 ten thousand; the specification of the crack resistant fiber acquisition is 6 mm.
The composition comprises the following components in percentage by weight: firstly, 62% of quartz sand, 24% of cement and 14% of light calcium carbonate are combined into one ton of raw material, and then 8.5 kg of hydroxypropyl methyl cellulose, 16 kg of anti-cracking fiber, 1.5 kg of starch ether and 3.5 kg of redispersible rubber powder are added into the one ton of raw material.
The preparation method of the finished mortar composition comprises the following steps:
1. large material combination: firstly, putting quartz sand, cement and light calcium carbonate into a stirrer according to the amount, and stirring the mixture uniformly to obtain a large-material raw material;
2. mixing raw materials: continuously adding hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder into the large material raw materials according to the amount, and then stirring for 50 minutes to uniformly mix all the raw materials to obtain a finished product raw material;
3. and (3) finished product: and subpackaging the finished raw materials into packaging bags according to the amount to obtain the finished mortar composition.
Specific example 3:
a waterproof anti-crack mortar composition is composed of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, anti-crack fiber, starch ether and redispersible rubber powder. Wherein the collection specification of the quartz sand is 70 meshes; the viscosity of the hydroxypropyl methyl cellulose is over 25 ten thousand; the specification of the crack resistant fiber acquisition is 6 mm.
The composition comprises the following components in percentage by weight: firstly, 61% of quartz sand, 25% of cement and 14% of light calcium carbonate are combined into one ton of raw material, and then 9 kg of hydroxypropyl methyl cellulose, 16.5 kg of anti-cracking fiber, 2 kg of starch ether and 4 kg of redispersible rubber powder are added into the one ton of raw material.
The preparation method of the finished mortar composition comprises the following steps:
1. large material combination: firstly, putting quartz sand, cement and light calcium carbonate into a stirrer according to the amount, and stirring the mixture uniformly to obtain a large-material raw material;
2. mixing raw materials: continuously adding hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder into the large material raw materials according to the amount, and then stirring for 50 minutes to uniformly mix all the raw materials to obtain a finished product raw material;
3. and (3) finished product: and subpackaging the finished raw materials into packaging bags according to the amount to obtain the finished mortar composition.
Product detection
The mortar composition prepared in example 1 of the present invention was submitted to Guangxi Zhuang autonomous region architecture science research and design institute for performance test, and the results of the test report are shown in the following table:
the inspection results in the step 1 show that the items inspected by the mortar composition prepared by the method meet the technical requirements of anti-crack mortar in the rubber powder polyphenyl particle external thermal insulation system material JG/T158-2013.
Claims (6)
1. The waterproof anti-crack mortar composition is characterized in that: the composition consists of quartz sand, cement, light calcium carbonate, hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder.
2. The waterproof anti-crack mortar composition according to claim 1, wherein: the collection specification of the quartz sand is 50-100 meshes, and the best specification is 60-80 meshes.
3. The waterproof anti-crack mortar composition according to claim 1, wherein: the viscosity of the hydroxypropyl methyl cellulose is over 15 ten thousand, and the optimal viscosity is over 25 ten thousand.
4. The waterproof anti-crack mortar composition according to claim 1, wherein: the anti-cracking fiber is collected in a specification of 3-10 mm, and preferably 6 mm.
5. The waterproof anti-crack mortar composition according to claim 1, wherein the composition comprises the following components in parts by weight: firstly, 50-70% of quartz sand, 20-30% of cement and 10-20% of light calcium carbonate are combined into one ton of raw material, and then 6-10 kg of hydroxypropyl methyl cellulose, 10-20 kg of anti-cracking fiber, 0.5-1.5 kg of starch ether and 2-5 kg of redispersible rubber powder are added into the one ton of raw material.
6. The waterproof anti-crack mortar composition according to claim 1, wherein the preparation method of the finished mortar composition is as follows:
(1) large material combination: firstly, putting quartz sand, cement and light calcium carbonate into a stirrer according to the amount, and uniformly stirring to obtain a large-material raw material;
(2) mixing raw materials: continuously adding hydroxypropyl methyl cellulose, anti-cracking fiber, starch ether and redispersible rubber powder into the large material raw materials according to the amount, and then stirring for 30-50 minutes to uniformly mix all the raw materials to obtain a finished product raw material;
(3) and (3) finished product: and subpackaging the finished raw materials into packaging bags according to the amount to obtain the finished mortar composition.
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| CN202010137445.XA CN111205027A (en) | 2020-03-02 | 2020-03-02 | Waterproof anti-crack mortar composition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010429A (en) * | 2022-05-31 | 2022-09-06 | 同济大学 | Mortar material suitable for robot brick laying and preparation method thereof |
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2020
- 2020-03-02 CN CN202010137445.XA patent/CN111205027A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010429A (en) * | 2022-05-31 | 2022-09-06 | 同济大学 | Mortar material suitable for robot brick laying and preparation method thereof |
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