CN112573870A - Self-leveling terrace material and preparation method thereof - Google Patents
Self-leveling terrace material and preparation method thereof Download PDFInfo
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- CN112573870A CN112573870A CN201910933984.1A CN201910933984A CN112573870A CN 112573870 A CN112573870 A CN 112573870A CN 201910933984 A CN201910933984 A CN 201910933984A CN 112573870 A CN112573870 A CN 112573870A
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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
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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
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (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 self-leveling terrace material which comprises the following components in parts by weight: 300 parts of cement 260-broken materials, 70-100 parts of silica fume, 40-60 parts of fly ash, 30-50 parts of stone powder, 490 parts of quartz sand 430-broken materials, 7-12 parts of toughening agent, 10-15 parts of water reducing agent, 2-6 parts of shrinkage reducing agent, 10-20 parts of viscosity reducing agent and 40-70 parts of water. The invention also discloses a preparation method of the self-leveling terrace material. The self-leveling terrace material has excellent mechanical property, durability, wear resistance, impermeability and impact resistance, and has excellent apparent effect; the construction process of self-leveling can be applied, and the construction process is simple; the raw materials have wide sources and low cost, and the method has remarkable economic benefit and wide application prospect.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a self-leveling terrace material and a preparation method thereof.
Background
The terrace is a ground which is constructed and processed by using specific materials and processes and has certain decoration and functionality. The service range of the terrace includes the terrace of the modern industrial enterprise, the commercial terrace, the terrace of the parking lot, the square, the station dock, the stadium of the school, the terrace of the logistics warehouse, the terrace of the hospital, etc., in a word, as long as the terrace face using the concrete can be made the terrace. The terrace has the advantages of smooth and clean surface, easy cleaning, seamless, moisture-proof, wear-resistant, impact-resistant and the like.
At present, the base materials of self-leveling mortar in China mainly comprise cement, epoxy resin materials, carborundum and the like. The cement terrace is widely applied to the traditional terrace and is formed by stirring and mixing cement, sand and a small amount of additives, and the cement terrace is easy to crack and sand in use and lack of elasticity, so that the cement terrace is difficult to meet the use requirements of places such as plants, laboratories, offices and hospitals. At present, when a floor is laid, floors coated with various resin coatings are generally adopted in places with higher requirements on cleanliness, durability and pollution resistance. The current resin coating terrace is mainly epoxy coating ground, but epoxy coating terrace effect in the in-service use is not ideal: the time required for installation is long, and the construction progress is influenced; the wear resistance, the impact resistance, the flexibility and the like are not satisfactory, and the service life is short; meanwhile, the resin coating terrace is also deficient in durability such as chemical stability, ultraviolet resistance, color retention, gloss retention and the like, is not high in environmental protection property, is difficult to meet the requirement of occasions with high environmental protection property, is generally high in manufacturing cost and increases the construction cost. The carborundum wear-resistant terrace cannot adopt a self-leveling construction process, generally needs the processes of material spreading construction, finishing, maintenance, joint cutting and filling and the like, and has complex process, thereby limiting the large-scale application of the carborundum wear-resistant terrace. Therefore, an ideal self-leveling terrace material is lacked in the current market.
Therefore, the development of a terrace material which has simple construction process, low cost, excellent mechanical property, durability, wear resistance and impact resistance and good appearance effect is a problem to be solved urgently.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a self-leveling terrace material which has excellent mechanical property, durability, wear resistance, impermeability and impact resistance and has excellent apparent effect; the construction process of self-leveling can be applied, and the construction process is simple; the raw materials have wide sources and low cost, and the method has remarkable economic benefit and wide application prospect.
The second purpose of the invention is to provide a preparation method of the self-leveling terrace material of the first purpose of the invention.
One of the purposes of the invention is realized by adopting the following technical scheme:
the self-leveling terrace material is characterized by comprising the following components in parts by weight:
300 parts of cement 260-broken materials, 70-100 parts of silica fume, 40-60 parts of fly ash, 30-50 parts of stone powder, 490 parts of quartz sand 430-broken materials, 7-12 parts of toughening agent, 10-15 parts of water reducing agent, 2-6 parts of shrinkage reducing agent, 10-20 parts of viscosity reducing agent and 40-70 parts of water.
Further, the cement is P.O 52.5.5 ordinary portland cement or P.I. 52.5 portland cement; the specific surface area of the cement is more than or equal to 350m2/kg。
Further, the average grain diameter of the silica fume is 0.1-0.3um, and the specific surface area is more than or equal to 16000m2Per kg, active index not less than 105%, SiO2The mass content is more than or equal to 95 percent; the content of particles with the fineness less than 1um in the silica fume is more than or equal to 85 percent.
Further, the fly ash is I-grade fly ash, the screen residue of a 45-micron square-hole sieve is not more than 10%, the ignition loss is not more than 4%, and the water requirement ratio is not more than 93%.
Further, the stone powder is quartz powder or limestone powder, and the fineness of the stone powder is more than or equal to 350 meshes; the fineness modulus of the quartz sand is 1.8-2.0.
Further, the toughening agent is polypropylene fiber and glass fiber, and the weight ratio of the polypropylene fiber to the glass fiber is 1.0: 0.5-0.8 by volume ratio; the lengths of the polypropylene fibers and the glass fibers are 6-10 mm; the breaking strength of the polypropylene fiber is more than or equal to 500MPa, and the breaking strength of the glass fiber is more than or equal to 1500 MPa.
Further, the water reducing agent is a polycarboxylic acid type high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is more than or equal to 25%.
Further, the preparation method of the shrinkage reducing agent comprises the following steps: dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0 (1.2-1.8) to 0.6-1.2, stirred for 1-2 minutes and reacted for 4-6 hours at the temperature of 120-.
Further, the viscosity reducer is a water-soluble redispersible powder comprising an ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; the solid content of the viscosity reducer is more than or equal to 99.0 percent, and the 400 mu m screen residue is not more than 2.0 percent.
The second purpose of the invention is realized by adopting the following technical scheme:
the invention relates to a preparation method of a self-leveling terrace material, which is characterized by comprising the following steps:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 2-3 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 5-8 minutes; adding the toughening agent, and stirring for 2-3 minutes to obtain the self-leveling terrace material.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, cement, silica fume, fly ash and the like are used as cementing materials, quartz sand is used as aggregate, a compact high-strength structure is formed under the condition of a water reducing agent and a small amount of water, and a three-dimensional network structure is formed in a matrix by a toughening agent, so that the overall performance of the terrace material is improved, the compressive strength and the bending strength of the terrace material are greatly improved, and the wear resistance, the permeability resistance and the impact resistance of the terrace material are greatly improved. Meanwhile, the secondary volcanic ash action of the silica fume and the class I fly ash and Ca (OH) generated by hydration of cement2High-strength C-S-H gel is generated by reaction, and the newly generated C-S-H gel is uniformly distributed in the structure in the matrixThe bonding effect among the aggregates, the fibers and the matrix can be improved in the interior, the interface of the aggregates and the fibers and in the gaps, and the wear resistance of the terrace is further improved.
2. According to the invention, a large amount of gelled materials are added, so that the shrinkage is large under the condition of a small amount of water, and microcracks are easy to generate; by adding the shrinkage reducing agent, the surface tension of the cement-based capillary pores can be reduced, and the tensile stress generated by water consumption and evaporation is counteracted, so that the shrinkage of the material is reduced, the stability of the self-leveling terrace material is improved, and the service life of the self-leveling terrace material is prolonged.
3. The viscosity reducer is emulsified and dispersed when meeting water to form a large amount of polymer rubber powder particles, has strong effects of water reduction, rolling balls and lubrication, forms hydrophobic groups among all the cementing material particles, disperses the cementing material particles, greatly improves the working performance of the self-leveling terrace material, and achieves a self-leveling state. Meanwhile, the adhesive powder particles can improve the bonding strength of the terrace material in the film forming process. In the hardening process of the floor material, the rubber powder particles can be used as a filling material to improve the compactness of the self-leveling floor material, so that the wear resistance and the anti-permeability of the self-leveling floor material are further improved.
4. The self-leveling terrace material has excellent mechanical property, and the compressive strength is more than or equal to 150 MPa; the bonding strength of the self-leveling terrace material, common concrete and mortar is more than or equal to 2.0 MPa; has good wear resistance, anti-permeability performance and impact resistance, and the wear resistance is more than or equal to 401/cm3(ii) a Grade of impermeability>P12; the impact frequency of 10kg metal balls is more than or equal to 265, so the self-leveling terrace material can be widely applied to various indoor and outdoor spaces such as industrial factory buildings, workshops and warehouses.
5. The self-leveling terrace material disclosed by the invention adopts an inorganic material as a base material, the raw material source is wide, the cost is low, meanwhile, the material has good construction performance, self-leveling can be realized, secondary plastering construction is not needed, the construction process is simple, the construction efficiency can be effectively improved, and the construction period is shortened.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment. The equipment and raw materials used are all available on the market or commonly used in the field. The methods in the following examples are conventional in the art unless otherwise specified.
The self-leveling terrace material comprises the following components in parts by weight:
300 parts of cement 260-broken materials, 70-100 parts of silica fume, 40-60 parts of fly ash, 30-50 parts of stone powder, 490 parts of quartz sand 430-broken materials, 7-12 parts of toughening agent, 10-15 parts of water reducing agent, 2-6 parts of shrinkage reducing agent, 10-20 parts of viscosity reducing agent and 40-70 parts of water.
As a further embodiment, the cement is P.O 52.5.5 portland cement or p.i. 52.5 portland cement; the specific surface area of the cement is more than or equal to 350m2/kg。
As a further embodiment, the silica fume has an average particle diameter of 0.1 to 0.3um and a specific surface area of 16000m or more2Per kg, active index not less than 105%, SiO2The mass content is more than or equal to 95 percent; the content of particles with the fineness less than 1um in the silica fume is more than or equal to 85 percent.
As a further embodiment, the fly ash is class I fly ash, the sieve residue of a 45-micron square-hole sieve is not more than 10%, the loss on ignition is not more than 4%, and the water requirement ratio is not more than 93%.
As a further implementation mode, the stone powder is quartz powder or limestone powder, and the fineness of the stone powder is more than or equal to 350 meshes; the fineness modulus of the quartz sand is 1.8-2.0.
As a further embodiment, the toughening agents are polypropylene fibers and glass fibers in a ratio of 1.0: 0.5-0.8 by volume ratio; the lengths of the polypropylene fiber and the glass fiber are 6-10 mm; the breaking strength of the polypropylene fiber is more than or equal to 500MPa, and the breaking strength of the glass fiber is more than or equal to 1500 MPa.
In a further embodiment, the water reducing agent is a polycarboxylic acid type high efficiency water reducing agent, and the water reducing rate of the water reducing agent is not less than 25%.
As a further embodiment, the shrinkage reducing agent is prepared by: dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0 (1.2-1.8) to 0.6-1.2, stirred for 1-2 minutes and reacted for 4-6 hours at the temperature of 120-.
As a further embodiment, the viscosity reducer is a water-soluble redispersible powder comprising an ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; the solid content of the viscosity reducer is more than or equal to 99.0 percent, and the residue on a sieve with the particle size of 400 mu m is not more than 2.0 percent.
The preparation method of the self-leveling terrace material comprises the following steps:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 2-3 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 5-8 minutes; adding the toughening agent, and stirring for 2-3 minutes to obtain the self-leveling terrace material.
Example 1:
the self-leveling terrace material comprises the following components in parts by weight:
P.O 52.5.5 parts of ordinary portland cement 260 parts, silica fume 70 parts, fly ash 40 parts, stone powder 30 parts, quartz sand 430 parts, toughening agent 7 parts, water reducing agent 10 parts, shrinkage reducing agent 2 parts, viscosity reducing agent 10 parts and water 40 parts.
P.O 52.5.5 specific surface area of Portland cement is 380m2Per kg; the average grain diameter of the silica fume is 0.2um, and the specific surface area is 17500m2Per kg, active index 106%, SiO2The mass content is 97%; the content of particles with the fineness less than 1um in the silica fume is 88 percent; the fly ash is I-grade fly ash, the screen residue of a 45-micron square-hole sieve is 8 percent, the ignition loss is 3.5 percent, and the water demand ratio is 90 percent; the stone powder is quartz powder, and the fineness of the stone powder is 400 meshes; the fineness modulus of the quartz sand is 1.8; the toughening agent is polypropylene fiber and glass fiber, and the weight ratio of the toughening agent to the glass fiber is 1.0: 0.7 by volume ratio; the lengths of the polypropylene fibers and the glass fibers are 8 mm; the breaking strength of the polypropylene fiber is 600MPa, and the breaking strength of the glass fiber is 1800 MPa; the water reducing agent is a polycarboxylic acid type high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is 32%; the viscosity reducer is water-soluble redispersible powder comprising ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; viscosity reducing agent solidThe content is 99.5 percent, and the residue on a 400 mu m sieve is 1.0 percent.
The preparation method of the shrinkage reducing agent comprises the following steps: dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0:1.2:0.6, stirred for 1 minute and reacted for 4 hours at the temperature of 120 ℃, thus obtaining the shrinkage reducing agent.
The preparation method of the self-leveling terrace material comprises the following steps:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 2 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 5 minutes; adding a toughening agent, and stirring for 2 minutes to obtain the self-leveling terrace material.
Example 2:
the self-leveling terrace material comprises the following components in parts by weight:
P.O 52.5.5 parts of ordinary portland cement 300 parts, silica fume 100 parts, fly ash 60 parts, stone powder 50 parts, quartz sand 490 parts, toughening agent 12 parts, water reducing agent 15 parts, shrinkage reducing agent 6 parts, viscosity reducing agent 20 parts, and water 70 parts.
P.O 52.5.5 ordinary Portland cement has a specific surface area of 400m2Per kg; the silica fume has an average particle diameter of 0.3um and a specific surface area of 18000m2Per kg, active index 108%, SiO2The mass content is 99 percent; the content of particles with the fineness less than 1um in the silica fume is 90 percent; the fly ash is I-grade fly ash, the screen residue of a 45-micron square-hole sieve is 5%, the ignition loss is 2%, and the water demand ratio is 85%; the stone powder is quartz powder, and the fineness of the stone powder is 450 meshes; the fineness modulus of the quartz sand is 2.0; the toughening agent is polypropylene fiber and glass fiber, and the weight ratio of the toughening agent to the glass fiber is 1.0: 0.8 by volume ratio; the lengths of the polypropylene fibers and the glass fibers are 10 mm; the breaking strength of the polypropylene fiber is 700MPa, and the breaking strength of the glass fiber is 1900 MPa; the water reducing agent is a polycarboxylic acid type high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is 35%; the viscosity reducer is water-soluble redispersible powder comprising ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; the solid content of the viscosity reducer is 99.8 percent, and the residue on a 400 mu m sieve is 1.8 percent.
The preparation method of the shrinkage reducing agent comprises the following steps: dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0:1.8:1.2, stirred for 2 minutes and reacted for 6 hours at 130 ℃, thus obtaining the shrinkage reducing agent.
The preparation method of the self-leveling terrace material comprises the following steps:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 3 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 8 minutes; adding a toughening agent, and stirring for 3 minutes to obtain the self-leveling terrace material.
Example 3:
the self-leveling terrace material comprises the following components in parts by weight:
280 parts of P, I52.5 Portland cement, 90 parts of silica fume, 50 parts of fly ash, 40 parts of stone powder, 450 parts of quartz sand, 10 parts of toughening agent, 12 parts of water reducing agent, 4 parts of shrinkage reducing agent, 15 parts of viscosity reducing agent and 60 parts of water.
The specific surface area of the P, I52.5 Portland cement is 360m2Per kg; the silica fume has an average particle diameter of 0.1um and a specific surface area of 17000m2Per kg, an activity index of 109%, SiO2The mass content is 99 percent; the content of particles with the fineness less than 1um in the silica fume is 90 percent; the fly ash is I-grade fly ash, the screen residue of a 45-micron square-hole sieve is 6 percent, the ignition loss is 3 percent, and the water demand ratio is 89 percent; the stone powder is limestone powder, and the fineness of the stone powder is 390 meshes; the fineness modulus of the quartz sand is 1.9; the toughening agent is polypropylene fiber and glass fiber, and the weight ratio of the toughening agent to the glass fiber is 1.0: 0.8 by volume ratio; the lengths of the polypropylene fibers and the glass fibers are 6 mm; the breaking strength of the polypropylene fiber is 550MPa, and the breaking strength of the glass fiber is 1550 MPa; the water reducing agent is a polycarboxylic acid type high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is 28 percent; the viscosity reducer is water-soluble redispersible powder comprising ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; the solid content of the viscosity reducer is 99.2 percent, and the residue on a 400 mu m sieve is 0.5 percent.
The preparation method of the shrinkage reducing agent comprises the following steps: dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0:1.5:0.8, stirred for 1 minute and reacted for 5 hours at the temperature of 125 ℃, thus obtaining the shrinkage reducing agent.
The preparation method of the self-leveling terrace material comprises the following steps:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 2.5 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 6 minutes; adding the toughening agent, and stirring for 2.5 minutes to obtain the self-leveling terrace material.
Example 4:
the self-leveling terrace material comprises the following components in parts by weight:
260 parts of P, I52.5 portland cement, 100 parts of silica fume, 40 parts of fly ash, 50 parts of stone powder, 430 parts of quartz sand, 7 parts of a toughening agent, 10 parts of a water reducing agent, 6 parts of a shrinkage reducing agent, 10 parts of a viscosity reducing agent and 70 parts of water.
The specific surface area of the P, I52.5 Portland cement is 350m2Per kg; the silica fume has an average particle diameter of 0.2um and a specific surface area of 16000m2Per kg, active index 105%, SiO2The mass content is 95 percent; the content of particles with the fineness less than 1um in the silica fume is 85 percent; the fly ash is I-grade fly ash, the screen residue of a 45-micron square-hole sieve is 8 percent, the ignition loss is 3.5 percent, and the water demand ratio is 90 percent; the stone powder is limestone powder, and the fineness of the stone powder is 350 meshes; the fineness modulus of the quartz sand is 1.9; the toughening agent is polypropylene fiber and glass fiber, and the weight ratio of the toughening agent to the glass fiber is 1.0: 0.8 by volume ratio; the lengths of the polypropylene fibers and the glass fibers are 8 mm; the breaking strength of the polypropylene fiber is 500MPa, and the breaking strength of the glass fiber is 1500 MPa; the water reducing agent is a polycarboxylic acid type high-efficiency water reducing agent, and the water reducing rate of the water reducing agent is 25%; the viscosity reducer is water-soluble redispersible powder comprising ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; the solid content of the viscosity reducer is 99.0 percent, and the residue on a 400 mu m sieve is 1.0 percent.
The preparation method of the shrinkage reducing agent comprises the following steps: dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0:1.5:0.8, stirred for 1 minute and reacted for 4 hours at the temperature of 120 ℃, thus obtaining the shrinkage reducing agent.
The preparation method of the self-leveling terrace material comprises the following steps:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 2 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 5 minutes; adding a toughening agent, and stirring for 2 minutes to obtain the self-leveling terrace material.
Verification of the examples:
the self-leveling terrace materials of examples 1 to 4 were subjected to performance tests, and the results of the performance tests are shown in table 1.
Table 1 results of performance testing of the self-leveling flooring materials of examples 1-4
As can be seen from Table 1, the compressive strength of the self-leveling terrace materials of examples 1 to 4 can reach more than 150MPa, the bonding strength with C30 concrete is not less than 2.0MPa, and the wear resistance reaches 401/cm3Above, the impermeability grade is greater than P12, the surface indentation diameter is less than 2.6mm, I20Reaching 17.0, the self-leveling terrace material disclosed by the invention has excellent mechanical property, durability, wear resistance, anti-permeability performance and impact resistance.
In the prior art, the compressive strength of the common cement-based self-leveling terrace is usually 30-50MPa, the bonding strength with C30 concrete is 0.5-1.0MPa, and the impermeability grade is P4-P8. Meanwhile, the self-leveling terrace material has good construction performance, can be suitable for a self-leveling construction process, does not need secondary plastering construction, and is simple in construction process; the self-leveling terrace material adopts inorganic materials as base materials, has wide raw material sources and low price, can greatly reduce the construction cost, and has obvious economic benefit and wide application prospect.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The self-leveling terrace material is characterized by comprising the following components in parts by weight:
300 parts of cement 260-broken materials, 70-100 parts of silica fume, 40-60 parts of fly ash, 30-50 parts of stone powder, 490 parts of quartz sand 430-broken materials, 7-12 parts of toughening agent, 10-15 parts of water reducing agent, 2-6 parts of shrinkage reducing agent, 10-20 parts of viscosity reducing agent and 40-70 parts of water.
2. The self-leveling flooring material of claim 1, wherein the cement is P.O 52.5.5 portland cement or p.i. 52.5 portland cement; the specific surface area of the cement is more than or equal to 350m2/kg。
3. The self-leveling floor material of claim 1, wherein the silica fume has an average particle size of 0.1-0.3um and a specific surface area of 16000m or more2Per kg, active index not less than 105%, SiO2The mass content is more than or equal to 95 percent; the content of particles with the fineness less than 1um in the silica fume is more than or equal to 85 percent.
4. The self-leveling floor material of claim 1, wherein the fly ash is class i fly ash, the 45 μm square mesh sieve has a retention of no more than 10%, a loss on ignition of no more than 4%, and a water demand ratio of no more than 93%.
5. The self-leveling terrace material according to claim 1, wherein the stone powder is quartz powder or limestone powder, and the fineness of the stone powder is not less than 350 meshes; the fineness modulus of the quartz sand is 1.8-2.0.
6. The self-leveling floor material of claim 1, wherein the toughening agent is polypropylene fiber and glass fiber according to a weight ratio of 1.0: 0.5-0.8 by volume ratio; the lengths of the polypropylene fibers and the glass fibers are 6-10 mm; the breaking strength of the polypropylene fiber is more than or equal to 500MPa, and the breaking strength of the glass fiber is more than or equal to 1500 MPa.
7. The self-leveling terrace material of claim 1, wherein the water reducing agent is a polycarboxylic acid type high efficiency water reducing agent, and the water reducing rate of the water reducing agent is not less than 25%.
8. The self-leveling floor material of claim 1, wherein the shrinkage reducing agent is prepared by the following steps:
dipropylene glycol dimethyl ether, phthalic anhydride and succinic anhydride are mixed according to the molar ratio of 1.0 (1.2-1.8) to 0.6-1.2, stirred for 1-2 minutes and reacted for 4-6 hours at the temperature of 120-.
9. The self-leveling flooring material of claim 1, wherein the viscosity reducer is a water-soluble redispersible powder comprising an ethylene-vinyl acetate copolymer; the viscosity reducer takes polyvinyl alcohol as a protective colloid; the solid content of the viscosity reducer is more than or equal to 99.0 percent, and the 400 mu m screen residue is not more than 2.0 percent.
10. A method of making a self-leveling flooring material as claimed in any one of claims 1 to 9, comprising the steps of:
placing the cement, the silica fume, the fly ash, the stone powder, the quartz sand and the viscosity reducer in a stirring pot according to the formula ratio, and stirring for 2-3 minutes; adding water, a water reducing agent and a shrinkage reducing agent, and stirring for 5-8 minutes; adding the toughening agent, and stirring for 2-3 minutes to obtain the self-leveling terrace material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910933984.1A CN112573870A (en) | 2019-09-29 | 2019-09-29 | Self-leveling terrace material and preparation method thereof |
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| CN117466609A (en) * | 2023-07-28 | 2024-01-30 | 中建三局集团有限公司 | Self-compacting terrace material |
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