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Funct. Mater. 2019; 26 (3): 573-578.

doi:https://doi.org/10.15407/fm26.03.573

Mechanical properties of lightweight aggregate concrete at high temperature

R.Guan

Puyang Vocational and Technical College, 457000 Henan, China

Abstract: 

The purpose of this study was to study the mechanical properties of lightweight aggregate concrete at high temperature. In view of the defects of lightweight aggregate concrete, shale ceramsite with high cylinder compressive strength and low porosity was used `as coarse aggregate to ensure the strength of lightweight agregate concrete. In addition, basalt fiber with high elastic modulus, high tensile strength and high temperature resistance and polypropylene fiber with light weight and good elasticity were added into lightweight aggregate concrete to study the influence of fiber on various mechanical properties of lightweight agregate concrete at high temperature. The results showed that HRL2 had the best fire resistance. Therefore, the fiber light aggregate concrete LC30 prepared in this study had the lowest strength and excellent high temperature resistance, and can be applied to the main structure with high fire protection requirements.

Keywords: 
lightweight aggregate concrete, high temperature, porosity, compressive strength, fiber.
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