Anti-efflorescence dry powder mortar
A dry powder mortar and anti-pantherine technology, which is applied in the field of building materials, can solve the problems of dry powder mortar efflorescence, quality accidents, building damage, etc., achieve the effect of strengthening the anti-pantherine effect, reducing maintenance costs, and preventing the effect of efflorescence again
Inactive Publication Date: 2019-11-12
BEIJING UNIV OF TECH
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Problems solved by technology
It will cause certain damage to the building, at least it will hinder the appearance of the building, and at the worst it will affect the quality rating of the construction project, sometimes it will affect its coloring effect, and it will also affect the bonding quality between buildings, especially Decorating, veneering, and painting layers on the base and surface may even cause quality accidents and prolong the delivery time
[0006] Although dry powder mortar has the advantages of "more, faster, better and more economical", the problem of efflorescence affects the use effect of dry powder mortar, so an improved dry powder mortar ratio is urgently needed to solve the problem of efflorescence in dry powder mortar
Method used
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[0032] The present invention will be further described in detail through specific embodiments below.
[0033] Table 1 Mass percentage of components in each embodiment example.
[0034]
[0035]
[0036] The fineness modulus of the quartz sand used is 120 mesh, and the chemical composition of the fly ash used is SiO 2 +Al 2 o 3 +Fe 2 o 3 =85% (mass ratio), the specific surface area is 2590cm 2 / g. The methyl cellulose ether is a commercially available raw material for industrial use, with a viscosity of 10,000-15,000.
[0037] Based on the above ratio, the physical properties of dry powder mortar are as follows (based on 28-day mortar): flexural strength (MP): 4.63-4.79, compressive strength (MP): 11.50-11.89, bonding strength (MP): 1.25 ~1.30, consistency (cm): 7.7~8.0, degree of layering (cm): 1.7~1.9, anti-pan-alkaline performance: no pan-alkaline can be seen in the above examples.
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The invention discloses anti-efflorescence dry powder mortar, which comprises, by weight, 25-30% of cement, 50-60% of quartz sand, 8-12% of fly ash, 0.6-0.8% of an expansion agent, 0.8-1% of a water reducing agent, 0.3-0.5% of a waterproof agent, 0.05-0.1% of methyl cellulose ether, and 3.0-5.5% of redispersible polymer rubber powder. According to the present invention, based on the formula of thedry powder mortar, the anti-efflorescence effects of various components are combined, such that the problem of efflorescence of dry powder mortar is solved, and the re-efflorescence is effectively prevented; and the anti-efflorescence dry powder mortar has characteristics of safety, environmental protection, no toxicity, no polluting, easy operation, maintenance cost reducing and significant application value and economic benefits.
Description
technical field [0001] The invention relates to an anti-pantherine dry powder mortar, which belongs to the field of building materials. Background technique [0002] Dry-mixed mortar is also called dry-mixed mortar or dry-mixed mortar. It mixes cement, sand, mineral admixtures and functional additives in a certain proportion in a dry state during the production process, and mixes them into a granular or The mixture in powder state can be used directly after mixing with water according to the specified ratio. [0003] Dry powder mortar began in European and American countries in the late 1950s, and developed rapidly in Asia in the 1980s. Dry powder mortar has a short history of development in China. It entered the field of construction materials in my country in the 1990s, but it has developed rapidly and has great potential. big. [0004] The advantages of dry powder mortar are obvious, which can be briefly described as "more, faster, better and more economical". First of ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/2023C04B2111/27C04B2201/50C04B14/06C04B18/08C04B22/14C04B24/20C04B24/42C04B24/383C04B24/26
Inventor 兰明章张星王晨龙崔素萍王剑锋王亚丽
Owner BEIJING UNIV OF TECH