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Polymer modified rubber mortar used for building leveling layer and construction method of polymer modified rubber mortar

A technology for modifying rubber and polymers, which is applied in building construction, building material processing, construction, etc. It can solve the problems of tires not being recycled, difficult to dissolve in organic solvents, waste of resources, etc., and achieve chloride ion permeability coefficient The effect of reducing, excellent thermal insulation performance, and increasing flexibility

Active Publication Date: 2013-10-09
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Polymer modified rubber mortar used for building leveling layer and construction method of polymer modified rubber mortar
  • Polymer modified rubber mortar used for building leveling layer and construction method of polymer modified rubber mortar
  • Polymer modified rubber mortar used for building leveling layer and construction method of polymer modified rubber mortar

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Effect test

Embodiment 1

[0066] Material composition: 30 parts of cement, 72 parts of sand, 5 parts of rubber powder, 9 parts of water, 3 parts of styrene-butadiene emulsion, and 0.05 parts of polypropylene fiber. The compressive strength is 16.3MPa, the fold ratio is 4.58, the polymer modified rubber mortar prepared has a 28-day flexural strength of 5.87MPa, a compressive strength of 25.5MPa, and a fold ratio of 4.34, and the 28-day chloride ion permeability coefficient of the mortar is 40.3× 10 -14 m 2 / s, the thermal conductivity is 0.46W / m·k.

Embodiment 2

[0068] Material composition: 30 parts of cement, 63 parts of sand, 7 parts of rubber powder, 9 parts of water, 3 parts of styrene-butadiene emulsion, 0.075 parts of polyester fiber, the flexural strength of the prepared polymer modified rubber mortar for 7 days is 3.51MPa, The compressive strength is 16.7MPa, the fold ratio is 4.76, the polymer modified rubber mortar prepared has a 28-day flexural strength of 5.24MPa, the compressive strength is 21.3MPa, the fold ratio is 4.06, and the 28-day chloride ion permeability coefficient of the mortar is 30.6 ×10 -14 m 2 / s, the thermal conductivity is 0.35W / m·k.

Embodiment 3

[0070] Material composition: 30 parts of cement, 72 parts of sand, 5 parts of rubber powder, 3 parts of fly ash (mineral admixture), 8 parts of water, 5 parts of styrene-butadiene emulsion, and 0.05 parts of polypropylene fiber. The flexural strength of the rubber mortar for 7 days was 3.23MPa, the compressive strength was 14.6MPa, and the folding ratio was 4.52. 3.53, the chloride ion permeability coefficient of the mortar for 28 days is 36.3×10 -14 m 2 / s, the thermal conductivity is 0.41W / m·k.

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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...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/22C04B38/00E04F13/02E04G21/02
CPCY02W30/91
Inventor 徐方陈建平阮少钦汤咏林成远吴江胡耀耀
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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