CN113416043A - Wall facing mortar, preparation method and use method thereof - Google Patents
Wall facing mortar, preparation method and use method thereof Download PDFInfo
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- CN113416043A CN113416043A CN202110850679.3A CN202110850679A CN113416043A CN 113416043 A CN113416043 A CN 113416043A CN 202110850679 A CN202110850679 A CN 202110850679A CN 113416043 A CN113416043 A CN 113416043A
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
Abstract
The invention discloses wall facing mortar, a preparation method and a use method thereof, and belongs to the technical field of building wall facing decoration materials. It includes: 10-30 parts of Portland cement, 10-50 parts of laterite and 30-70 parts of quartz sand. The wall facing mortar is 100% inorganic mortar, does not contain organic additives, is beneficial to energy conservation and emission reduction, has more natural and beautiful decorative effect, avoids the condition of poor fire resistance caused by the existence of organic additives, utilizes a plurality of characteristics of red clay, can ensure the compressive strength and the flexural strength required by the whole mortar, also has the effects of high temperature fire resistance and saltpetering resistance, can achieve the national A1-grade fire resistance of decorative materials, and expands the application range of the facing mortar in places required by the building code A1 such as public buildings. The invention solves the problem that some anti-crack mortar and thermal insulation mortar can not be directly used on the exposed outer vertical surface at present, and the facing mortar of the invention is 100 percent of inorganic mortar products which can be directly exposed on the outer vertical surface.
Description
Technical Field
The invention relates to the technical field of building wall surface decoration materials, in particular to wall surface facing mortar, a preparation method and a use method thereof.
Background
There are many ways to decorate and protect buildings, and the most labor-saving, economical, and quick and convenient method of maintenance and renewal is to use paint. The building coating not only enables the inner and outer walls of the building to be fresh and neat and beautiful, but also can prolong the service life of the building and improve the indoor and outdoor use effects of the building. The building paint has rich colors, vivid texture and high construction efficiency, and is widely applied to building decoration at home and abroad.
The wall facing mortar is used as a high-quality architectural decorative coating, and has wide color variation range and rich modeling. It is composed of inorganic gelled material, filler, additive and aggregate, and is used for internal and external surfaces of building wall. The facing mortar can be widely used as building exterior wall decoration material instead of paint and ceramic tile, and has natural and unique decoration effect. Compared with the existing coating veneer and ceramic tile veneer, the material performance of the coating veneer and the ceramic tile veneer is similar to that of plastering mortar in an external thermal insulation system, and the thermal mechanical properties such as elastic modulus, thermal expansion coefficient and the like of the coating veneer and the ceramic tile veneer are similar to those of the plastering mortar. Compared with a finish coat prepared from organic materials such as paint and the like, the finish mortar has better matching property and compatibility with an external thermal insulation system. Compared with the ceramic tile veneer, the veneer mortar layer has the thickness of only 1-3mm, is light in weight, can not fall off due to the problems of negative air pressure and the like when being used as a veneer layer of a high-rise building, and is a green decorative material.
The facing mortar used as the exterior facing of the building not only needs to endow the building with abundant appearance characteristics, but also needs to form a barrier to protect the wall from being damaged by the environment. Therefore, the mortar must have the following properties: good pliability, and the coating is thicker, can effectively absorb deformation stress, prevent the appearance of surface crack: the color is lasting, the durability is good, and the weather environment of different areas can be adapted; the requirement on the flatness of the base layer is not high, a putty layer can be omitted, and fine uneven parts of the building elevation can be eliminated; the construction is easy, the smearing property is good, the construction method is diversified, manual smearing or mechanical spraying is realized, and the construction is quick, simple and convenient; the single component can be used after being mixed with water on site, and the quality is stable; the elasticity modulus, the thermal expansion coefficient and the like are basically similar to those of the plastering mortar, and the plastering mortar has good matching property and compatibility with an external thermal insulation system of an external wall; the coating has strong thermal stress resistance and is beneficial to heat dissipation; the air permeability and the waterproofness are balanced, and the wall surface is ensured to be dry and comfortable; the coating has high hardness, and can effectively improve the shock resistance of the decorative layer.
In the composition of the facing mortar, the additives are divided into organic additives and inorganic additives, the organic additives mainly comprise cellulose ether, lignocellulose, redispersible latex powder of acrylate copolymer, polymer emulsion and the like, and the organic materials have poor fire resistance, so that the fire resistance of the facing mortar is influenced, the facing mortar is difficult to use in places with high fire resistance requirements, and the application range of the facing mortar is limited.
Disclosure of Invention
The invention aims to provide wall facing mortar, a preparation method and a use method thereof, and aims to solve the problems that the existing facing mortar contains organic additives with poor fire resistance, so that the facing mortar has poor fire resistance and the application of the facing mortar is limited.
The technical scheme for solving the technical problems is as follows:
a wall facing mortar comprising: 10-30 parts of Portland cement, 10-50 parts of laterite and 30-70 parts of quartz sand.
The wall facing mortar of the invention is 100% inorganic mortar and does not contain organic additives. The organic auxiliary agent is added into the existing wall facing mortar formula to improve the fluidity and toughness of the facing mortar, and the invention can also be realized by red clay.
Laterites, also known as red soil, are widely distributed in the wet regions of the subtropical and subtropical regions of China, are moderately desilicated aluminized iron bauxite which develops under the vegetation of subtropical and tropical rain forests, evergreen broadleaf forests, and are acid soils. The soil was enriched with iron-aluminum oxides and red due to the lack of alkaline earth metals and alkali metals. Generally, red soil has deep weathering degree, obvious development of reticulate pattern layer, fine particles, sticky and heavy texture and low clay activity, clay minerals of the red soil take kaolinite as a main component, the content of iron oxide and aluminum is rich, and the saturation of base is low. This is because laterite is formed by the long-term action of the process of aluminizing and bioaccumulation, so that laterite has the remarkable characteristics of strong desilication and aluminizing effects, high iron freeness, high content of slime and secondary minerals, and the like.
The main clay mineral components in the laterite are kaolinite and diaspore, and also comprise organic humus, organic matters and crystalline compounds of aluminum and iron, the clay mineral components in the laterite can be bonded with cement mortar well and provide fluidity.
Wherein, clay mineral has special crystal structure and has given laterite many unique characteristics, laterite utilizes clay mineral's self cohesiveness characteristic, and clay granule passes through the colloidal particle and adsorbs the hydrone on its surface, and the hydrone layer that is adsorbed by clay granule has higher viscosity, adsorbs with portland cement and quartz sand, through the absorption water layer interconnect who forms between the clay granule, attracts each other, has formed the wet cohesive force to form the cohesiveness of mortar, and in this process, moisture is not evaporated, and the mortar can keep its mobility.
The content of organic humus in the red soil is about 0.2 percent, the red soil is an organic colloid with variable charges, contains functional groups with high reactivity such as carboxyl, phenolic hydroxyl and the like, also has adsorption capacity, can be adsorbed with cement and quartz sand, and improves the caking property of mortar.
The organic matter contains a large amount of negative charges and different functional groups, and has a large specific surface area of soil, so that the adsorbability of the organic matter with cement quartz sand can be improved, the bonding performance of clay minerals can be enhanced, and the bonding performance of mortar is facilitated.
Moreover, the red soil also contains about 0.2 percent of natural plant fiber, so that the cohesiveness of the mortar can be improved, and lignocellulose additionally added in the traditional mortar material can be replaced.
Therefore, the red clay can replace organic additives in the traditional mortar and can also achieve the fluidity and toughness required by the mortar.
In addition, organic additives are not additionally added into the mortar material, so that the reduction of the fireproof performance of the mortar caused by the existence of the organic additives is avoided. Meanwhile, the iron-aluminum oxide compound in the laterite can form tricalcium aluminate and tetracalcium aluminoferrite in the cement hydration reaction, and the aluminum oxide and the ferric oxide are inorganic heat-insulating refractory materials with excellent performance. The aluminum oxide iron has the characteristics of high melting point, good thermal stability, high hardness, good wear resistance, high mechanical strength, good electrical insulation, corrosion resistance and the like, can effectively improve the high-temperature strength of the mortar, and improves the fire resistance of the mortar, thereby achieving the purpose of preventing fireThe effect of fire. The formed tricalcium aluminate and tetracalcium aluminoferrite are in crystal structures, thereby reducing Ca in the mortar2+CO permeating into mortar surface and air under capillary pressure2Water-insoluble white calcium carbonate crystals are generated, thereby further playing the role of resisting whiskering.
Finally, the laterite added in the invention is acid soil, and the mineral clay in the laterite has a certain micro-aggregate effect, so that the micro-cracks of the mortar can be filled, the pore structure of the mortar is optimized, and the inhibition of saltpetering of the mortar is facilitated. The red clay is red, can be used as a natural additive pigment of the facing mortar, has natural aesthetic degree, and does not need to be additionally added with other pigments.
Further, in a preferred embodiment of the present invention, the wall finishing mortar includes: according to parts by weight, 15-25 parts of Portland cement, 20-40 parts of laterite and 40-60 parts of quartz sand.
Further, in a preferred embodiment of the present invention, the wall finishing mortar includes: 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand.
Further, in a preferred embodiment of the present invention, the mesh number of the quartz sand is 20 to 60 mesh.
Further, in a preferred embodiment of the present invention, the wall finishing mortar further includes: and water, wherein the adding amount of the water is 20-25% of the total mass of the portland cement, the laterite and the quartz sand.
The preparation method of the wall facing mortar comprises the following steps:
(1) stirring and mixing the red soil and the quartz sand uniformly, adding the silicate cement, stirring and mixing uniformly to obtain a mixture, filling the mixture into a moisture-proof bag, and sealing for later use;
(2) and (3) stirring and mixing the mixture and water, and fully stirring to obtain the wall facing mortar.
The use method of the wall facing mortar comprises the following steps:
the wall facing mortar is uniformly coated on the wall surface by adopting construction equipment, the strength is preliminarily formed after 20-30 hours, and the strength is completely reached within 12-17 days.
Further, in a preferred embodiment of the present invention, the construction open time of the wall facing mortar is 0.8 to 1 hour.
The invention has the following beneficial effects:
the wall facing mortar is 100% inorganic mortar, does not contain organic additives, is beneficial to energy conservation and emission reduction, has more natural and beautiful decorative effect, avoids the condition of poor fire resistance caused by the existence of organic additives, utilizes a plurality of characteristics of red clay, can ensure the compressive strength and the flexural strength required by the whole mortar, also has the effects of high temperature fire resistance and saltpetering resistance, can achieve the national A1-grade fire resistance of decorative materials, and expands the application range of the facing mortar in places required by the building code A1 such as public buildings. The invention solves the problem that some anti-crack mortar and thermal insulation mortar can not be directly used on the exposed outer vertical surface at present, and the facing mortar of the invention is 100 percent of inorganic mortar products which can be directly exposed on the outer vertical surface.
Detailed Description
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention. 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.
Example 1
The wall facing mortar of the embodiment comprises: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
The preparation method of the wall facing mortar of the embodiment comprises the following steps:
(1) stirring and mixing the red soil and the quartz sand uniformly, adding the silicate cement, stirring and mixing uniformly to obtain a mixture, filling the mixture into a moisture-proof bag, and sealing for later use;
(2) stirring and mixing the mixture and water, and fully stirring to obtain wall facing mortar;
example 2:
the wall facing mortar of the embodiment has the same mixture ratio as that of the embodiment 1, and is different in preparation method, specifically as follows:
(1) stirring and mixing the red soil and the quartz sand uniformly, adding the silicate cement, stirring and mixing uniformly to obtain a mixture, filling the mixture into a moisture-proof bag, and sealing for later use;
(2) stirring and mixing the mixture and water, and fully stirring to obtain wall facing mortar;
example 2:
the wall facing mortar of the embodiment has the same mixture ratio as that of the embodiment 1, and is different in preparation method, specifically as follows:
(1) stirring and mixing the red soil and the quartz sand uniformly, adding the silicate cement, stirring and mixing uniformly to obtain a mixture, filling the mixture into a moisture-proof bag, and sealing for later use;
(2) stirring and mixing the mixture and water, and fully stirring to obtain wall facing mortar;
example 4
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the proportion of the portland cement is not used, the addition amount of the portland cement is 10 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 10 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 5
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the proportion of the portland cement is not used, the addition amount of the portland cement is 15 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 15 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 6
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the proportion of the portland cement is not used, the addition amount of the portland cement is 25 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: 25 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 7
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the proportion of the portland cement is not used, the addition amount of the portland cement is 30 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 30 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
The variables for examples 1 and 4-7 are 20 parts, 10 parts, 15 parts, 25 parts and 30 parts of portland cement.
Example 8
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the amount of the laterite is 10 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 10 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 9
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the amount of the laterite is 20 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 20 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 10
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, 40 parts of laterite is added, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 40 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 11
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the amount of the laterite is 50 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 50 parts of laterite and 50 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
The variables for example 1, examples 8-11 are laterite, 30 parts, 10 parts, 20 parts, 40 parts, 50 parts, respectively.
Example 12
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of the quartz sand is 30 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: 20 parts of Portland cement, 30 parts of laterite and 30 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 13
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of the quartz sand is 40 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 40 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 14
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of the quartz sand is 60 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 60 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 15
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of the quartz sand is 70 parts, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 70 parts of quartz sand; the addition of water is 23% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
The variables for example 1 and examples 12-15 were quartz sand, 50 parts, 30 parts, 40 parts, 60 parts, and 70 parts, respectively.
Example 16
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of water is 20 wt%, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition amount of water is 20% of the total mass of the portland cement, the red clay and the quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 17
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of water is 22 wt%, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 22% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 18
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of water is 24 wt%, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 24% of the total mass of portland cement, red clay and quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
Example 19
The preparation method of the wall facing mortar of the embodiment is the same as that of the embodiment 1, except that the laterite is not used in proportion, the addition amount of water is 25 wt%, and other components are the same.
The method comprises the following steps: comprises the following components in parts by weight: according to the parts by weight, 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand; the addition of water is 25% of the total mass of the portland cement, the red clay and the quartz sand.
Wherein the mesh number of the quartz sand is 50 meshes.
The variables for example 1, examples 16-19 were water, 23 wt%, 20 wt%, 22 wt%, 24 wt%, 25 wt%, respectively.
Example 20
The use method of the wall facing mortar of the embodiment comprises the following steps:
the wall facing mortar is uniformly coated on the wall surface by adopting construction equipment, the strength is preliminarily formed after 20-30 hours, and the strength is completely reached within 12-17 days.
Wherein the construction open time of the wall facing mortar is 0.8-1 h.
And (3) carrying out performance test on the facing mortar obtained in the embodiment, and analyzing the difference degree between the performance and the proportion of the facing mortar.
Test example 1: influence of a single factor on the facing mortar
1. Influence of the amount of Portland cement on the facing mortar
The performance test was performed on example 1 and examples 4 to 7, and a comparative example was set up, and the test results are shown in table 1.
TABLE 1 influence of Portland Cement dosage on facing mortar Properties
As can be seen from Table 1, the flexural strength, tensile bond strength and aged bond strength tended to decrease with decreasing portland cement content, with the minimum addition being required at 10 parts portland cement. Since a certain performance margin is required in use, the amount of the portland cement is preferably not less than 20 minutes. The alkali efflorescence resistance of the above groups meets the requirements.
2. Influence of red soil dosage on facing mortar
The performance test is performed on example 1 and examples 8-11, and a comparative example is set up, and the test results are shown in Table 2.
TABLE 2 influence of laterite dosage on facing mortar Performance
As can be seen from Table 2, the correlation between the amount of laterite and the breaking strength was not large, and was proportional to the tensile bond strength and the aged bond strength. On the premise of exceeding the standard floating performance of 20 percent, the addition amount of 30 parts of laterite is scientific.
3. Influence of quartz sand cement dosage on facing mortar
The performance test was performed on example 1 and examples 12 to 15, and a comparative example was set up, and the test results are shown in table 3.
TABLE 3 influence of Quartz Sand usage on facing mortar Performance
As can be seen from Table 3, as the amount of sand increases, the compressive strength and tensile bond strength, aging cycle bond strength begin to decrease, with 50 parts sand being the optimum amount.
4. Influence of water dosage on facing mortar
The performance test was performed on example 1 and examples 16 to 19, and a comparative example was set up, and the test results are shown in Table 4.
TABLE 4 influence of Water dosage on the Properties of the facing mortar
As can be seen from Table 4, the influence of the addition of water on the performance is complex, the mechanical property is high between 22% and 24% of the addition amount, and the mechanical property is obviously reduced after the addition amount deviates from the interval. Therefore, in practical use, the proper addition amount in the interval can be selected according to the modeling and the viscosity.
Test example 2:
the wall facing material of example 1 of the present invention was tested for fire resistance according to the national standard GB 8624 and 2012 "grading of fire performance of building materials and products", and the results are shown in table 5.
TABLE 5 fireproofing performance of the wall facing material of example 1
As can be seen from Table 5, the wall facing mortar of the invention has the heat release amount of only 0.1MJ/kg in the combustion process which is far lower than the standard, and the temperature rise in the furnace is only 2 ℃, and the fireproof performance is outstanding.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A wall facing mortar, comprising: 10-30 parts of Portland cement, 10-50 parts of laterite and 30-70 parts of quartz sand.
2. The wall finishing mortar of claim 1, comprising: according to parts by weight, 15-25 parts of Portland cement, 20-40 parts of laterite and 40-60 parts of quartz sand.
3. The wall finishing mortar of claim 2, comprising: 20 parts of Portland cement, 30 parts of laterite and 50 parts of quartz sand.
4. The wall finishing mortar of any one of claims 1 to 3, wherein the quartz sand has a mesh size of 20 to 60 mesh.
5. The wall finishing mortar of any one of claims 1 to 3, further comprising: and water, wherein the adding amount of the water is 20-25% of the total mass of the portland cement, the laterite and the quartz sand.
6. The method for preparing the wall finishing mortar of any one of claims 1 to 5, comprising the steps of:
(1) stirring and mixing the red soil and the quartz sand uniformly, adding the silicate cement, stirring and mixing uniformly to obtain a mixture, filling the mixture into a moisture-proof bag, and sealing for later use;
(2) and (3) stirring and mixing the mixture and water, and fully stirring to obtain the wall facing mortar.
7. The method of using the wall finishing mortar of any one of claims 1 to 5, comprising the steps of:
the wall facing mortar is uniformly coated on the wall surface by adopting construction equipment, the strength is preliminarily formed after 20-30 hours, and the strength is completely reached within 12-17 days.
8. The method for using wall finishing mortar of claim 7, wherein the construction open time of the wall finishing mortar is 0.8 to 1 hour.
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| Publication number | Priority date | Publication date | Assignee | Title |
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