Expanded perlite fine powder-polymer latex powder composite modified dry mortar

Abstract

The invention relates to expanded perlite fine powder-polymer latex powder composite modified dry mortar, which comprises the following components in percentage by weight: 2.5 to 4.5 percent of composite dry mortar admixture, 23.1 to 23.6 percent of cement, 69.4 to 70.9 percent of river sand, 0.7 to 1.4 percent of cellulose ether, 0.5 to 0.8 percent of acrylic staple fiber, and 0.5 to 0.8 percent of wood fiber. The pressing-breaking ratio of the dry mortar is less than 3, the compressive strength is over 8.8MPa, and the cost of the dry mortar is lowest and only 1 / 3 of polymer latex powder admixture; and the composite dry mortar admixture has remarkable water holding effect, and increases the stretching adhesive strength of the water soaked mortar besides the effect of optimizing mortar construction and accessibility.

Description

technical field [0001] The invention belongs to the field of composite dry powder mortar, in particular to a composite modified dry powder mortar of expanded perlite fine powder-polymer latex powder. Background technique [0002] In recent years, the country has vigorously promoted ready-mixed dry powder mortar to replace traditional mortar. As a substitute product of traditional mortar, dry powder mortar has many advantages, such as easy to guarantee the construction quality, good construction efficiency, can improve the working conditions of workers, and cause little pollution to the environment and so on. At the same time, with the advancement of modern construction technology and the improvement of human living standards, people have put forward more and higher requirements for the performance of construction mortar, among which toughness is one of them. Many standards in our country use a fold ratio lower than 3 to evaluate the toughness of cement mortar. For example,...

AI Technical Summary

Problems solved by technology

Although polymer-modified dry-mix mortar has excellent performance and can be widely used in various aspects of the construction field, the cost of polymer is high, and the price is much higher than the price of cement, and the amount of polymer in dry-mix mortar configured by common technology It is also high (the amount of general polymer accounts for about 20% of the cement mass), and as a result, the high cost has seriously hindered the popularization and application of dry powder mortar.

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