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Performance composite insulation mortar and mortar cracking Preparation and Properties

Author: HuLiang
Tutor: YuJianYing
School: Wuhan University of Technology
Course: Materials Science
Keywords: Insulation mortar Polystyrene Compatibility Cracking mortar Crack resistance
CLC: TU578.1
Type: Master's thesis
Year: 2010
Downloads: 344
Quote: 3
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Abstract


Polystyrene insulation composite system consists of particles of polystyrene insulation mortar layer, cracking mortar layer and the interface mortar layer. Because polystyrene foam (EPS) particles and cement exist large differences in density, poor compatibility problems, leading to the current EPS particle composite thermal insulation mortar construction is poor, with grass to low bond strength, hollowing prone to fall off, and the existing The EPS insulation mortar compressive strength of the composite particles is low, limiting its application in thermal engineering. Meanwhile existing cracking mortar crack resistance is still poor, under stress will appear a large number of micro-cracks. Therefore, improving the EPS particles and cement compatibility, improved EPS insulation mortar and primary particle composite bond strength, compressive strength and crack resistance cracking mortar, has a very important significance. In this paper, a surface treatment agent made of EPS particles to surface treatment of EPS, the EPS particles and improved compatibility of cement was prepared with the basic compound bond strength of EPS thermal insulation mortar; studied silica fume, sepiolite fibers , ceramic and so on sludge mechanical properties of thermal insulation to improve the thermal insulation mortar compressive strength, so that can be used for roofing insulation works; studied hybrid fibers, crumb rubber, capillary crystalline admixtures for mortar crack crack resistance of prepared mortar excellent crack crack resistance. The main conclusions are: 1.EPS particles to surface treatment, the particle surface to form a hardened silicate shell, not only can significantly reduce the EPS foam the cement particles and the density difference, can significantly improve the EPS particles and cement compatibility . On a surface treatment for the thermal insulation EPS insulation mortar aggregates prepared, and its construction properties, mechanical properties and adhesion with the grass roots has been significantly improved. 2 silica fume addition on the compressive strength of the composite insulation materials, adhesive strength has some improvement. Sepiolite fibers not only to some extent, improve the insulation material insulation properties, but also significantly improve the thermal insulation materials, compressive, flexural strength and toughness. Adding sludge ceramic insulation materials can significantly improve the mechanical strength. 3. The trefoil short polypropylene fiber and basalt fiber hybrid join mortar cracking mortar can effectively improve the toughness and crack resistance. Na2SiO3 crumb were used for surface treatment, with improved compatibility of cement, mortar, can significantly increase the crack toughness and impact resistance, thereby improving crack resistance of the mortar, in contrast, treatment with Na2SiO3 powder more effective than NaOH treatment powder. Capillary crystalline cracking mortar admixtures can improve crack resistance, and give cracking mortar cracks self-healing properties.

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CLC: > Industrial Technology > Building Science > Building Materials > Waterproof,moisture-proof material,caulking,sealing materials > Caulking , sealing materials > Mortar
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