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High-performance polyurethane external thermal insulation anti-crack leveling mortar and construction method thereof

A technology for external thermal insulation and leveling mortar for external walls, applied in the direction of building and building structure, can solve the problems of cracking, low water absorption, high bonding and other problems of the external thermal insulation system, and achieves easy construction, low water absorption, and cylinder compressive strength. high effect

Inactive Publication Date: 2011-03-30
JIANGSU NIGAO SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above defects, the technical problem to be solved by the present invention is to propose a polyurethane exterior wall insulation system crack-resistant leveling mortar with low water absorption, low elastic modulus, high adhesion, and stable performance, which is convenient for construction and can save polyurethane insulation. Layer interface treatment to solve quality problems such as cracking and hollowing in the polyurethane external wall insulation system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this high-performance polyurethane external thermal insulation and anti-crack leveling mortar, the ratio of components A and B is 100:4. The amount of each substance contained in component A is: Portland cement 50kg, fly ash 11kg, expansion agent 4kg, grain Vitrified microbeads with a diameter of 30-50 mesh and a bulk density of 110-130g / L 25kg, acrylic redispersible latex powder 6kg, polycarboxylate water reducer 0.14kg, polypropylene fiber 0.27kg, polyether defoaming Agent 0.03kg, cellulose ether 0.3kg, starch ether 0.05kg, component B is epoxy modified asphalt 3.87kg.

Embodiment 2

[0039] In this high-performance polyurethane external thermal insulation and anti-crack leveling mortar, the ratio of components A and B is 100:9, and the amount of each substance contained in component A is: Portland cement 65kg, fly ash 10kg, expansion agent 5kg, granular 20kg of vitrified microbeads with a diameter of 50-70 mesh and a bulk density of 110-130g / L, 4kg of acrylic redispersible latex powder, 0.12kg of polycarboxylate water reducer, 0.03kg of polyether defoamer, polypropylene Fiber 0.25kg, cellulose ether 0.2kg, modified bentonite 0.4kg, component B is epoxy modified asphalt 9.45kg.

Embodiment 3

[0041] In this high-performance polyurethane external thermal insulation and anti-crack leveling mortar, the ratio of components A and B is 100:6, and the amount of each substance contained in component A is: ordinary Portland cement 55kg, fly ash 10kg, expansion agent 6kg, 20kg of vitrified microbeads with a particle size of 30-50 mesh and a bulk density of 110-130g / L, 9kg of vitrified microbeads with a particle size of 50-70 mesh and a bulk density of 110-130g / L, vinyl acetate redispersible latex powder 3kg, melamine water reducer 0.5kg, polyether defoamer 0.05kg, polypropylene fiber 0.3kg, cellulose ether 0.3kg, starch ether 0.05kg, modified bentonite 0.35kg, component B is epoxy Modified asphalt 6.27kg.

[0042] The high-performance polyurethane external wall thermal insulation and anti-crack leveling mortar of the present invention can be used at the construction site by mechanically adding water and stirring according to a specified ratio. It has the advantages of stabl...

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Abstract

The invention discloses a high-performance two-component polyurethane external thermal insulation anti-crack leveling mortar which is prepared by mixing a component A and a component B, wherein the component A comprises the following compositions in percentage by weight: 60 to 80 percent of gelled materials, 20 to 30 percent of aggregates and 0 to 10 percent of functional admixtures; and the component B is water repellents. The construction method of the mortar comprises the following steps: mixing the component A and the component B; adding an appropriate amount of water in the obtained mixture; and uniformly stirring the obtained object until the obtained object reaches the consistence suitable for mechanical spraying or manual construction, namely, the obtained object can be subject to mechanical spraying or manual construction. The external thermal insulation anti-crack leveling mortar of the invention has the advantages of low water absorption rate, low modular ratio, high caking property and stable performance; and the interface processing carried out on a polyurethane insulation coating can be omitted, and the quality problems that a polyurethane external thermal insulation system is easy to produce crazes and hollowing, and the like can be solved.

Description

technical field [0001] The invention relates to a construction engineering mortar, in particular to a high-performance polyurethane exterior thermal insulation crack-resistant leveling mortar and a construction method thereof. Background technique [0002] Polyurethane rigid foam spraying is a new building energy-saving technology for external wall insulation system. Compared with EPS and XPS foam insulation systems, since polyurethane insulation is a thermosetting material, it is inert in combustion and will not produce molten flammable flame drops, but only forms a coking protective layer, which prevents oxygen Into the interior of the wall insulation layer, it can effectively inhibit the danger of flame spread caused by melting, and has good flame retardancy. In addition, polyurethane insulation materials also have low thermal conductivity, good sealing performance, and strong adaptability to deformation of the main structure. Excellent crack resistance, convenient const...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E04F21/06
Inventor 钱中秋马德功杨江金张菁燕朱国峰周春荣刘小泉蒋青青
Owner JIANGSU NIGAO SCI & TECH
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