Experiment on the Mechanical Performance of Fiber Lightweight Aggregate Concrete after Freeze-Thaw and Elevated Temperature

Abstract:

Experiment on the compressive strength and splitting tensile strength of fiber lightweight aggregate concrete (FLWAC) after freeze-thaw cycling and high temperature was tested through blending polyvinyl alcohol fiber (PVAF) and polyacrylonitrile fiber (PANF) in aggregate concrete respectively. Five temperature levels, room temperature, 200°C, 400°C, 600°Cand 800°C were selected to heat the FLWAC test blocks after 25 times of freeze-thaw cycling. The micro-structure of FLWAC was observed through SEM. The experiment results show that, the cubic compressive strength of FLWAC is improved when the temperature is above 200°C, and the splitting tensile strength of FLWAC is obviously improved between the ranges from room temperature to 600°C. Blending fiber can weaken the brittle fracture performance of LWAC after freeze-thaw cycling at the peak loading state. However, the mass loss doesn’t have obvious improvement before and after 25 number of freeze-thaw cycling.

• Periodical: Advanced Materials Research (Volumes 919-921)
• Pages: 1790-1793
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.919-921.1790
• Online since: April 2014
• Authors: Bo Cheng*, Jing Huang, Wen Ting Jiang, Jian Min Wang
• Keywords: Fiber Lightweight Aggregate Concrete, Freeze-Thaw Cycle, High-Temperature, Mechanical Performance

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