A kind of polymer modified rubber mortar for building leveling layer and its construction method

Abstract

The invention discloses polymer modified rubber mortar for a building leveling layer. The polymer modified rubber mortar is formed by doping three modified materials including rubber powder, a polymer and an organic fibre into modified cement mortar. The polymer modified rubber mortar is formed by mixing the following components in parts by weight: 30-40 parts of cement, 5-20 parts of water, 2-10 parts of the polymer, 50-90 parts of sand, 5-15 parts of the rubber powder, 0.05-0.15 part of the organic fibre, 0-5 parts of mineral admixtures, 0-1 part of an auxiliary, and 0-0.5 part of an additive. According to the freshly-mixed polymer modified rubber mortar, the thickness is controlled to be 7cm, during the curing period of 7 days, the compressive strength of the mortar is not less than 10 MPa, the rupture strength is not less than 3.5 MPa, during the curing period of 28 days, the compressive strength of the mortar is not less than 15 MPa, the rupture strength is not less than 5 MPa, the chloride ion permeation coefficient is not larger than 50*10<-14>m<2> / s, and the heat conductivity coefficient is not larger than 0.5W / m.k. The polymer modified rubber mortar disclosed by the invention can be used for effectively solving the problems of sugaring, peeling, crispiness, bulging, cracking and the like existing in the traditional cement mortar leveling layer, has the performance advantages of permeability resistance, crack prevention, thermal insulation, high tenacity and the like, can fully utilize waste rubber, can turn waste into wealth, and is suitable for various building leveling layers.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a polymer-modified rubber mortar used for building leveling layers and a construction method thereof. Background technique [0002] The leveling layer is a structural layer for leveling, slope finding or strengthening on the cushion, floor or filling layer. This layer is an essential part of waterproofing, heat preservation, leveling, etc. in house construction. However, it is found through research that the current use of building screeds is not ideal. Due to the shrinkage of the cement mortar itself during the setting and hardening process, irregular cracks or cracks caused by thermal expansion and cold contraction result in poor impermeability of the cement mortar in the leveling layer and are prone to water leakage; Poor material bonding, such as poor bonding with ceramic tiles or waterproof membranes, is easy to form hollows; ordinary leveling layer cement mort...

AI Technical Summary

Problems solved by technology

It is insoluble in water, hardly soluble in organic solvents, and not perishable. It is expensive to process according to traditional methods. Therefore, the treatment of waste rubber has been related to global environmental protection and resource utilization.

According to the data released by the China Rubber Association in 2011, the output of waste tire rubber in my country in 2010 has reached 4.5 million tons, of which about 30% of the tires have not been recycled, which has caused a huge threat to the environment and is also a serious problem. waste of resources

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