Mortar and concrete modified by emulsified asphalt
A technology of emulsifying asphalt and modification, which is applied in the field of cement mortar and concrete, and can solve the problems of limitation, less application of concrete, and high price
Inactive Publication Date: 2010-09-01
TSINGHUA UNIV +1
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- 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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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0089] Mix the required raw materials according to the table below (foam particles are added by volume)
[0090]
[0091] 1 Stir at a speed of 30r / min for 4min with a mortar mixer, stagnate for 1min, and then stir for 2min at a speed of 45r / min.
[0092] The performance test of the thermal insulation mortar prepared according to this ratio after hardening 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 coefficient 0.76
Embodiment 2
[0096] Mix the required raw materials according to the table below (foam particles are added by volume)
[0097]
[0098] Stir at a speed of 25r / min for 4min with a mortar mixer, stagnate for 1min, and then stir at a speed of 40r / min for 2min.
Embodiment 3
[0100] Mix the required raw materials according to the table below (foam particles are added by volume)
[0101]
[0102] Stir at a speed of 30r / min for 4min with a mortar mixer, stagnate for 1min, and then stir at a speed of 45r / min for 2min.
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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 buildingexterior 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 externalwall 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 cement mortar and concrete modified by emulsified asphalt, which is 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 process of modernization, the development of the construction industry and the continuous improvement 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 bond strength, higher modulus of elasticity but poorer deformability, brittle in nature, easy to crack, etc., making it face many difficulties in application. Modification of mortar or concrete with polymer emulsion or redispersible rubber powder can endow mortar or concrete with many superior properties. A large number of studies ...
Claims
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IPC IPC(8): C04B28/00C04B24/36
Inventor 孔祥明罗海傅强
Owner TSINGHUA UNIV