CN108424170B - Flexible mortar for bonding light partition wall and preparation method thereof - Google Patents
Flexible mortar for bonding light partition wall and preparation method thereof Download PDFInfo
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- CN108424170B CN108424170B CN201810497553.0A CN201810497553A CN108424170B CN 108424170 B CN108424170 B CN 108424170B CN 201810497553 A CN201810497553 A CN 201810497553A CN 108424170 B CN108424170 B CN 108424170B
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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
- C04B28/06—Aluminous 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural 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
- C04B2111/40—Porous or lightweight 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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Abstract
Flexible mortar for bonding light partition walls and a preparation method thereof, belonging to the field of building materials. The flexible mortar comprises the following raw materials in parts by weight: 60-90 parts of aluminate cement, 420 parts of ordinary portland cement 350-420 parts, 30-35 parts of phosphogypsum whisker, 20-24 parts of anhydrous sodium sulphate, 480 parts of sand 420-480 parts, 25-35 parts of expanded vermiculite powder, 50-70 parts of heavy calcium carbonate, 30-40 parts of calcined kaolin, 5-10 parts of cellulose ether and 35-40 parts of rubber powder. Has the advantages of high bonding strength, good crack resistance and the like. The preparation method comprises mixing the above raw materials. The operation is simple, and the prepared mortar has the advantages of high bonding strength, good crack resistance and the like.
Description
Technical Field
The invention relates to the field of building materials, in particular to flexible mortar for bonding a light partition wall and a preparation method thereof.
Background
The light partition board has a series of advantages of light weight, sound insulation, heat insulation, moisture resistance, fire resistance and the like, so that the construction is simple, convenient and quick; the self weight of the building can be reduced, and the building function can be improved; and the construction cost is saved, and the energy consumption is reduced. The building block can be widely applied to the construction of non-bearing walls such as rooms, households, toilets, kitchens, partitions and the like of high-rise buildings with frame structures, industrial plants, buildings, civil houses and old houses, and is particularly suitable for public entertainment places with high fireproof requirements.
However, the construction butt joint of the light partition boards is a difficult problem which troubles the development of the industry, the thickness of a construction mortar joint between the partition boards is about 8mm generally, the longitudinal mortar joint is long, the butt joint by adopting the traditional common cement mortar and the like usually has the defects of insufficient bonding force, large volume shrinkage and the like, and the surface of a stress concentration part of a wall joint is mostly cracked longitudinally. According to the summary of field construction experience, once the width of the whole wall body of the wallboard with the width of 60cm exceeds 4.5m, the probability of surface cracking of the middle stress concentration part is more than 80%, and the anti-cracking effect is poor. Therefore, it is of great significance to research a cement mortar with excellent crack resistance for use in installation applications of bonding a light partition wall.
In view of this, the present application is specifically made.
Disclosure of Invention
The invention aims to provide flexible mortar for bonding light partition walls, which has the advantages of high bonding strength, good crack resistance and the like.
The invention also aims to provide a preparation method of the flexible mortar for bonding the light partition wall, which is simple to operate, and the prepared mortar has the advantages of high bonding strength, good crack resistance and the like.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The invention provides flexible mortar for bonding a light partition wall, which comprises the following raw materials in parts by weight:
60-90 parts of aluminate cement, 420 parts of ordinary portland cement 350-420 parts, 30-35 parts of phosphogypsum whisker, 20-24 parts of anhydrous sodium sulphate, 480 parts of sand 420-480 parts, 25-35 parts of expanded vermiculite powder, 50-70 parts of heavy calcium carbonate, 30-40 parts of calcined kaolin, 5-10 parts of cellulose ether and 35-40 parts of rubber powder.
The invention provides a preparation method of flexible mortar for bonding a light partition wall, which comprises the following steps: mixing the above materials.
The embodiment of the invention has the beneficial effects that:
the flexible mortar for bonding the light partition wall provided by the invention adopts a conforming system of aluminate cement and ordinary portland cement, the advantages of the aluminate cement and the ordinary portland cement are complementary, the strength of the mortar is stable, the volume of a hardened body is stable, the aluminate cement can fully and effectively absorb free calcium generated by hydration of the ordinary portland cement to reduce the alkalinity of a mixed system, the hydration of a main phase of the cement can be accelerated, and the mortar has the advantages of quick hardening and early strength. The inventor researches and discovers that under the composite system of the two types of cement, the phosphogypsum whiskers and the anhydrous sodium sulphate are added, so that the phenomenon that ettringite is continuously converted into the single-sulfur type hydrated calcium sulphoaluminate can be effectively inhibited, the condition that the microstructure is degraded due to the conversion of the crystal form of the unstable hydrated calcium aluminate is avoided, and the high compressive strength and the small drying shrinkage value of the mortar are ensured. The combination of the expanded vermiculite powder, the heavy calcium carbonate and the calcined kaolin improves the physical organization structure of the hardened cement mortar, is beneficial to improving the compactness of the mortar, enables the mortar to have higher hydration rate and early tensile bonding, compression resistance and rupture strength, and enables the hardened body not to shrink and crack.
The preparation method of the flexible mortar for bonding the light partition wall, provided by the invention, is simple to prepare, and the raw materials are mixed according to the proportion, so that the obtained mortar has the advantages of high bonding strength, good crack resistance and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The flexible mortar for bonding lightweight partition walls and the preparation method thereof according to the embodiments of the present invention will be described in detail below.
The invention provides flexible mortar for bonding a light partition wall, which comprises the following raw materials in parts by weight:
60-90 parts of aluminate cement, 420 parts of ordinary portland cement 350-420 parts, 30-35 parts of phosphogypsum whisker, 20-24 parts of anhydrous sodium sulphate, 480 parts of sand 420-480 parts, 25-35 parts of expanded vermiculite powder, 50-70 parts of heavy calcium carbonate, 30-40 parts of calcined kaolin, 5-10 parts of cellulose ether and 35-40 parts of rubber powder.
Optionally, the raw materials comprise, by weight:
70-80 parts of aluminate cement, 400 parts of ordinary portland cement 360-400 parts, 32-34 parts of phosphogypsum whisker, 21-23 parts of anhydrous sodium sulphate, 440 parts of sand 460 parts, 28-32 parts of expanded vermiculite powder, 55-60 parts of heavy calcium carbonate, 32-38 parts of calcined kaolin, 6-8 parts of cellulose ether and 36-38 parts of rubber powder.
Further optionally, the raw materials comprise, by weight:
75 parts of aluminate cement, 380 parts of ordinary portland cement, 32 parts of phosphogypsum whisker, 22 parts of anhydrous sodium sulphate, 450 parts of sand, 30 parts of expanded vermiculite powder, 58 parts of heavy calcium carbonate, 35 parts of calcined kaolin, 8 parts of cellulose ether and 36 parts of rubber powder.
In the raw material proportion, a composite system of aluminate cement and ordinary portland cement is adopted, the advantages of the two cements are complementary, the strength of the mortar is stable, the volume of a hardened body is stable, the aluminate cement can fully and effectively absorb free calcium generated by hydration of the ordinary portland cement to reduce the alkalinity of the mixed system, the hydration of a main phase of the cement can be accelerated, and the mortar has the advantages of quick hardening and early strength.
When the aluminate cement and the ordinary portland cement are mixed, under the condition that the mixing amount of the aluminate cement is large, although the generation amount of the ettringite in the slurry is slightly increased in a short period of hydration, the ettringite is continuously converted into single-sulfur hydrated calcium sulphoaluminate, the unstable hydrated calcium aluminate generated in the early stage is also subjected to crystal form conversion, only the microstructure of the hardened slurry of the mixed system is obviously deteriorated, and the compressive strength is obviously reduced compared with that of the portland cement on the macro scale, and the drying shrinkage is greatly improved.
In the invention, the phosphogypsum whiskers and the anhydrous sodium sulphate are added to provide a sulfur source under the condition of large aluminate cement doping amount, so that the phenomenon that ettringite is continuously converted into single-sulfur calcium sulphoaluminate hydrate can be effectively inhibited, the condition that the microstructure is degraded due to the crystal form conversion of unsteady calcium sulphoaluminate hydrate is avoided, and the hardened slurry of the mixed system can be ensured to have the performances of high compressive strength and small drying shrinkage value under the condition of large aluminate cement doping amount.
In some specific embodiments of the invention, the aluminate cement is CA-60, and the ordinary portland cement has a strength grade of 42.5R, so that the mortar has good bonding strength and stable structural performance.
The addition of the kaolin can obviously improve the strength, freeze-thaw cycle resistance and other performances of the mortar. The calcined kaolin is adopted, so that the surface energy of the kaolin can be reduced through calcination treatment, the dispersion performance of the kaolin is improved, and the strength of a product can be improved.
In some embodiments of the invention, the calcined kaolin consists of a kaolin calcined product calcined at 550-.
Further, the mass ratio of the kaolin calcined product calcined at the temperature of 550-700 ℃ to the kaolin calcined product calcined at the temperature of 1100-1200 ℃ is 1:2-3, and may be, for example, 1:2, 1:2.5, 1:3, etc.
The calcined products of the kaolin at the temperature of 550-700 ℃ are mainly metakaolin, and the calcined products of the kaolin at the temperature of 1100-1200 ℃ are mainly mullite, mullite and cristobalite. The inventor researches and discovers that the effect of the calcined kaolin on improving the performance of the mortar is obviously improved by mixing the calcined kaolin according to the proportion.
The combination of the expanded vermiculite powder, the heavy calcium carbonate and the calcined kaolin improves the physical organization structure of the hardened cement mortar, is beneficial to improving the compactness of the mortar, enables the mortar to have higher hydration rate and early tensile bonding, compression resistance and rupture strength, and enables the hardened body not to shrink and crack.
The cross-linking reaction is generated in the hydration process of the rubber powder and the cement, the physical organization structure of the mortar hardened body is improved, the internal stress is relieved, the generation of microcracks is reduced, and the compactness of the polymer cement material is enhanced.
The cellulose ether is used as a thickening agent, mainly controls the consistency and the opening time of the mortar, improves the wet viscosity of the wet mortar and improves the bonding strength of the mortar.
The glue powder and the cellulose ether are matched with a cement composite system, so that the construction convenience of the flexible mortar for bonding the light partition wall can be effectively improved, and the bonding strength of the flexible mortar for bonding the light partition wall is improved.
In some embodiments of the invention, the cellulose ether is comprised of methylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose.
Further, the mass ratio of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose is 3-4:0.5-1.5:1 in this order, and may be, for example, 3:1:1, 4:1:1, 3:0.5:1, 4:0.5:1, 3:1.5:1, 4:1.5:1, and the like.
The research of the inventor finds that the three cellulose ethers are matched with a cement composite system according to a certain proportion, so that the fluidity of the mortar can be effectively improved, and the strength of the mortar is improved; the flexible mortar for bonding the light partition wall effectively reduces cracks or fissures in the hardening and drying shrinkage processes after construction, and improves the mechanical strength.
The invention also provides a preparation method of the flexible mortar for bonding the light partition wall, which comprises the step of mixing the raw materials according to the component proportion.
The method is simple, and the components of the raw materials are mixed according to the proportion, so that the obtained mortar has the advantages of high bonding strength, good crack resistance and the like.
Further, the mixing of raw materials includes: mixing and stirring aluminate cement, ordinary portland cement, phosphogypsum whiskers, anhydrous sodium sulphate and 30-45% of sand to obtain a first mixture; mixing and stirring the first mixture, 30-50% of expanded vermiculite powder, heavy calcium carbonate, calcined kaolin, cellulose ether and rubber powder to obtain a second mixture; and mixing and stirring the second mixture, the rest sand and the rest expanded vermiculite powder. Wherein 30-45% of the sand is the mass ratio of the sand, and 30-50% of the expanded vermiculite powder is the mass white.
The materials are mixed according to the operation sequence, so that the skeleton structure and the components of the obtained flexible mortar for bonding the light partition wall have uniform and compact microstructures, and the comprehensive performance of the flexible mortar for bonding the light partition wall is improved.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
A flexible mortar for bonding light partition walls comprises the following raw materials:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of ground calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2.5; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method comprises the following steps:
s1, mixing and stirring aluminate cement, ordinary portland cement, phosphogypsum whiskers, anhydrous sodium sulphate and 40% of sand to obtain a first mixture.
S2, mixing and stirring the first mixture, 40% expanded vermiculite powder, heavy calcium carbonate, calcined kaolin, cellulose ether and rubber powder to obtain a second mixture.
And S3, mixing and stirring the second mixed material, the rest 60% of sand and the rest 60% of expanded vermiculite powder to obtain the flexible mortar for bonding the light partition walls.
Example 2
A flexible mortar for bonding light partition walls comprises the following raw materials:
70kg of CA-60 aluminate cement, 400kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 23kg of anhydrous sodium sulphate, 440kg of sand, 32kg of expanded vermiculite powder, 55kg of heavy calcium carbonate, 38kg of calcined kaolin, 6kg of cellulose ether and 38kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 3; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 4:1: 1.
The preparation method comprises the following steps:
s1, mixing and stirring aluminate cement, ordinary portland cement, phosphogypsum whiskers, anhydrous sodium sulphate and 45% of sand to obtain a first mixture.
S2, mixing and stirring the first mixture, 30% expanded vermiculite powder, heavy calcium carbonate, calcined kaolin, cellulose ether and rubber powder to obtain a second mixture.
And S3, mixing and stirring the second mixed material, the rest 55% of sand and the rest 70% of expanded vermiculite powder to obtain the flexible mortar for bonding the light partition walls.
Example 3
A flexible mortar for bonding light partition walls comprises the following raw materials:
80kg of CA-60 aluminate cement, 360kg of 42.5R ordinary portland cement, 34kg of phosphogypsum whiskers, 21kg of anhydrous sodium sulphate, 460kg of sand, 28kg of expanded vermiculite powder, 60kg of ground calcium carbonate, 32kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:0.5: 1.
The preparation method comprises the following steps:
s1, mixing and stirring aluminate cement, ordinary portland cement, phosphogypsum whiskers, anhydrous sodium sulphate and 30% of sand to obtain a first mixture.
S2, mixing and stirring the first mixture, 50% expanded vermiculite powder, heavy calcium carbonate, calcined kaolin, cellulose ether and rubber powder to obtain a second mixture.
And S3, mixing and stirring the second mixed material, the rest 70% of sand and the rest 50% of expanded vermiculite powder to obtain the flexible mortar for bonding the light partition walls.
Example 4
A flexible mortar for bonding light partition walls comprises the following raw materials:
60kg of CA-60 aluminate cement, 420kg of 42.5R ordinary portland cement, 30kg of phosphogypsum whisker, 24kg of anhydrous sodium sulphate, 420kg of sand, 35kg of expanded vermiculite powder, 50kg of ground calcium carbonate, 40kg of calcined kaolin, 5kg of cellulose ether and 40kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2.5; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1.5: 1.
The preparation method is shown in reference example 1.
Example 5
A flexible mortar for bonding light partition walls comprises the following raw materials:
90kg of CA-60 aluminate cement, 350kg of 42.5R ordinary portland cement, 352kg of phosphogypsum whisker, 20kg of anhydrous sodium sulphate, 480kg of sand, 25kg of expanded vermiculite powder, 70kg of ground calcium carbonate, 30kg of calcined kaolin, 10kg of cellulose ether and 35kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2.5; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method is shown in reference example 1.
Example 6
A flexible mortar for bonding light partition walls comprises the following raw materials:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of ground calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin is a kaolin calcined product calcined at the temperature of 550-700 ℃; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method is shown in reference example 1.
Example 7
A flexible mortar for bonding light partition walls comprises the following raw materials:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of ground calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin is a kaolin calcined product calcined at the temperature of 1100-1200 ℃; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method is shown in reference example 1.
Example 8
A flexible mortar for bonding light partition walls comprises the following raw materials:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of ground calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin is a kaolin calcined product calcined at the temperature of 1100-1200 ℃; the cellulose ether is methyl cellulose.
The preparation method is shown in reference example 1.
Example 9
A flexible mortar for bonding light partition walls comprises the following raw materials:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of ground calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin is a kaolin calcined product calcined at the temperature of 1100-1200 ℃; the cellulose ether consists of methyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3: 2.
The preparation method is shown in reference example 1.
Example 10
A flexible mortar for bonding light partition walls comprises the following raw materials:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of ground calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2.5; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method comprises the following steps: the raw materials are mixed and stirred for 10-20min to obtain the flexible mortar for bonding the light partition wall.
Comparative example 1
A flexible mortar for bonding light partition walls is different from the flexible mortar in example 1 in that the cement only adopts ordinary portland cement, and the flexible mortar comprises the following raw materials:
455kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whisker, 22kg of anhydrous sodium sulphate, 450kg of sand, 30kg of expanded vermiculite powder, 58kg of heavy calcium carbonate, 35kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2.5; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method comprises the following steps:
s1, mixing and stirring ordinary portland cement, phosphogypsum whiskers, anhydrous sodium sulphate and 40% of sand to obtain a first mixture.
S2, mixing and stirring the first mixture, 40% expanded vermiculite powder, heavy calcium carbonate, calcined kaolin, cellulose ether and rubber powder to obtain a second mixture.
And S3, mixing and stirring the second mixed material, the rest 60% of sand and the rest 60% of expanded vermiculite powder to obtain the flexible mortar for bonding the light partition walls.
Comparative example 2
A flexible mortar for bonding lightweight partition walls, which differs from example 1 in that calcined kaolin is used instead of expanded vermiculite powder and heavy calcium carbonate, and the raw materials comprise:
75kg of CA-60 aluminate cement, 380kg of 42.5R ordinary portland cement, 32kg of phosphogypsum whiskers, 22kg of anhydrous sodium sulphate, 450kg of sand, 120kg of calcined kaolin, 8kg of cellulose ether and 36kg of rubber powder.
Wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and 1100-1200 ℃ in a mass ratio of 1: 2.5; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose in a mass ratio of 3:1: 1.
The preparation method comprises the following steps:
s1, mixing and stirring aluminate cement, ordinary portland cement, phosphogypsum whiskers, anhydrous sodium sulphate and 40% of sand to obtain a first mixture.
And S2, mixing and stirring the first mixture, the calcined kaolin, the cellulose ether and the rubber powder to obtain a second mixture.
And S3, mixing and stirring the second mixed material and the rest 60% of sand to obtain the flexible mortar for bonding the light partition wall.
Test examples
The flexible mortar for bonding light partition walls of examples 1 to 10 and comparative examples 1 to 2 were subjected to performance tests, and the results thereof are shown in table 1.
TABLE 1 Performance test Table
In conclusion, the flexible mortar for bonding the light partition wall provided by the invention adopts a conforming system of aluminate cement and ordinary portland cement, the advantages of the aluminate cement and the ordinary portland cement are complementary, the strength of the mortar is stable, the volume of a hardened body is stable, the aluminate cement can fully and effectively absorb free calcium generated by hydration of the ordinary portland cement to reduce the alkalinity of a mixed system, the hydration of a main phase of the cement can be accelerated, and the mortar has the advantages of quick hardening and early strength. The inventor researches and discovers that under the composite system of the two types of cement, the phosphogypsum whiskers and the anhydrous sodium sulphate are added, so that the phenomenon that ettringite is continuously converted into the single-sulfur type hydrated calcium sulphoaluminate can be effectively inhibited, the condition that the microstructure is degraded due to the conversion of the crystal form of the unstable hydrated calcium aluminate is avoided, and the high compressive strength and the small drying shrinkage value of the mortar are ensured. The combination of the expanded vermiculite powder, the heavy calcium carbonate and the calcined kaolin improves the physical organization structure of the hardened cement mortar, is beneficial to improving the compactness of the mortar, enables the mortar to have higher hydration rate and early tensile bonding, compression resistance and rupture strength, and enables the hardened body not to shrink and crack.
The preparation method of the flexible mortar for bonding the light partition wall, provided by the invention, is simple to prepare, and the raw materials are mixed according to the proportion, so that the obtained mortar has the advantages of high bonding strength, good crack resistance and the like.
The embodiments described above are some, but not all embodiments of the invention. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (5)
1. The flexible mortar for bonding the light partition wall is characterized by comprising the following raw materials in parts by weight:
60-90 parts of aluminate cement, 420 parts of ordinary portland cement 350-420 parts, 30-35 parts of phosphogypsum whisker, 20-24 parts of anhydrous sodium sulphate, 480 parts of sand 420-480 parts, 25-35 parts of expanded vermiculite powder, 50-70 parts of heavy calcium carbonate, 30-40 parts of calcined kaolin, 5-10 parts of cellulose ether and 35-40 parts of rubber powder;
wherein the calcined kaolin consists of a kaolin calcined product calcined at the conditions of 550-700 ℃ and a kaolin calcined product calcined at the conditions of 1100-1200 ℃; the cellulose ether consists of methyl cellulose, hydroxyethyl cellulose and hydroxypropyl methyl cellulose;
the mass ratio of the calcined kaolin product at the temperature of 550-700 ℃ to the calcined kaolin product at the temperature of 1100-1200 ℃ is 1: 2-3;
the type of the aluminate cement is CA-60, and the strength grade of the ordinary portland cement is 42.5R;
the mass ratio of the methyl cellulose to the hydroxyethyl cellulose to the hydroxypropyl methyl cellulose in the cellulose ether is 3-4:0.5-1.5:1 in sequence.
2. The flexible mortar for bonding lightweight partition walls according to claim 1, wherein the raw materials comprise, in parts by weight:
70-80 parts of aluminate cement, 400 parts of ordinary portland cement 360-400 parts, 32-34 parts of phosphogypsum whiskers, 21-23 parts of anhydrous sodium sulphate, 460 parts of sand 440-460 parts, 28-32 parts of expanded vermiculite powder, 55-60 parts of heavy calcium carbonate, 32-38 parts of calcined kaolin, 6-8 parts of cellulose ether and 36-38 parts of rubber powder.
3. The flexible mortar for bonding lightweight partition walls according to claim 1, wherein the raw materials comprise, in parts by weight:
75 parts of aluminate cement, 380 parts of ordinary portland cement, 32 parts of phosphogypsum whiskers, 22 parts of anhydrous sodium sulphate, 450 parts of sand, 30 parts of expanded vermiculite powder, 58 parts of heavy calcium carbonate, 35 parts of calcined kaolin, 8 parts of cellulose ether and 36 parts of rubber powder.
4. The method for preparing a flexible mortar for bonding lightweight partition walls according to any one of claims 1 to 3, wherein the raw materials are mixed.
5. The method of claim 4, wherein the mixing of the raw materials comprises: mixing and stirring the aluminate cement, the ordinary portland cement, the phosphogypsum whiskers, the anhydrous sodium sulphate and 30-45% of the sand to obtain a first mixture; mixing and stirring the first mixture, 30-50% of expanded vermiculite powder, the heavy calcium carbonate, the calcined kaolin, the cellulose ether and the rubber powder to obtain a second mixture; and mixing and stirring the second mixture, the rest of the sand and the rest of the expanded vermiculite powder.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19812246C2 (en) * | 1998-03-20 | 2001-06-28 | Pci Augsburg Gmbh | Flowable, hydraulically setting mortar system and its use |
| CN104671726A (en) * | 2013-11-28 | 2015-06-03 | 立邦涂料（中国）有限公司 | High-strength cement-based self-leveling mortar |
| CN105622029A (en) * | 2015-12-25 | 2016-06-01 | 江苏蓝圈新材料有限公司 | Cement-based self-leveling mortar |
| CN105753419A (en) * | 2016-01-27 | 2016-07-13 | 佛山市佳密特防水材料有限公司 | Rapidly leveling type mortar for ground leveling |
| CN106187058A (en) * | 2016-07-04 | 2016-12-07 | 德清扬泰建筑材料有限公司 | A kind of environment-friendly type waterproof dry powder mortar and preparation method thereof |
| CN106830851A (en) * | 2017-03-24 | 2017-06-13 | 江苏蓝圈新材料股份有限公司 | A kind of self-leveling cement mortar and its application based on whisker reinforcement |
| CN107540329A (en) * | 2017-09-26 | 2018-01-05 | 河南兴安新型建筑材料有限公司 | Quick-hardening cement based self-leveling mortar |
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