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Mortar and concrete modified by emulsified asphalt

A technology for emulsification of asphalt and concrete, applied in the field of cement mortar and concrete, can solve the problems of less application of concrete, high price, restrictions, etc.

Inactive Publication Date: 2008-09-03
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of these polymer emulsions, a large number of applications are limited in many occasions. At present, they are mainly concentrated in some mortars with special performance requirements, and the application in concrete is still seldom

Method used

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  • Mortar and concrete modified by emulsified asphalt
  • Mortar and concrete modified by emulsified asphalt
  • Mortar and concrete modified by emulsified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Mix the required raw materials according to the following table (the foam particles are added by volume)

[0090]

[0091] 1 Stir at 30r / min for 4min by mortar mixer, stop for 1min, and then stir at 45r / min for 2min.

[0092] The performance test of the thermal insulation mortar prepared according to this ratio is as follows:

[0093] Compressive strength (14 days) 475.6KPa Thermal conductivity 0.065W / (m·K)

[0094] Dry apparent density 385.3kg / m 3 Softening factor 0.76

Embodiment 2

[0096] Mix the required raw materials according to the following table (the foam particles are added by volume)

[0097]

[0098] Stir at 25r / min for 4min by mortar mixer, stop for 1min, and then stir at 40r / min for 2min.

Embodiment 3

[0100] Mix the required raw materials according to the following table (the foam particles are added by volume)

[0101]

[0102] Stir for 4 minutes at a speed of 30r / min by a mortar mixer, stop for 1 minute, and then stir at a speed of 45r / min for 2 minutes.

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Abstract

The invention relates to a mortar and concrete modified by emulsified asphalt and is mainly applied in the fields of building insulation and waterproofing. The invention is characterized in that the mortar and the concrete are mainly produced by mixing inorganic cementing material, emulsified asphalt, aggregate, water and other additives. The invention uses emulsified asphalt instead of polymer emulsion or rubber powder for producing the modified cement mortar and concrete, which improves the various properties of the mortar and the concrete and has an obvious effect in the fields of building exterior wall insulation and waterproofing. Compared with the concrete without adding asphalt emulsion and film-forming polymers, the water absorption of the produced waterproof concrete is reduced by more than 20%, and the anti-chloride permeability is improved by more than 30%, and the anti-carbonation performance is improved by more than 15%. In the construction energy-saving field of external wall insulation, the polyphenyl granule insulation mortar produced with emulsified asphalt, bonding mortar and surface mortar of polystyrene board insulation system can significantly save the material cost under the premise of guaranteeing the performances.

Description

Technical field [0001] The invention relates to a cement mortar and concrete modified by emulsified asphalt, which are mainly used in the fields of heat preservation and waterproofing, such as wall heat preservation, dam waterproofing and the like. Background technique [0002] With the progress of modernization, the development of the construction industry and the continuous progress of construction technology and the wide application of cement mortar, more and higher requirements are put forward for the performance of mortar, while traditional cement mortar has many shortcomings, such as compressive strength Higher but lower tensile strength and bonding strength, higher elastic modulus and lower deformability, brittle nature, easy to crack, etc., make it face many difficulties in application. Using polymer emulsion or redispersible rubber powder to modify mortar or concrete can give mortar or concrete many superior properties. A large number of studies and practices have shown ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B24/36
Inventor 孔祥明罗海傅强
Owner TSINGHUA UNIV
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