硅酸盐通报2025，Vol.44Issue(2)：447-454,462,9.DOI:10.16552/j.cnki.issn1001-1625.20241202.001
高温后掺辅助胶凝材料的橡胶混凝土力学强度与损伤机制
Mechanical Strength and Damage Mechanism of Rubber Concrete with Supplementary Cementitious Materials after High-Temperature
摘要
Abstract
In order to explore the mechanical strength degradation characteristics of rubber concrete(RC)after high-temperature,the mass loss,compressive strength,splitting tensile strength and flexural strength of RC with different supplementary cementitious materials(SCMs)under high-temperature were tested,and the effects of temperature and SCMs on RC strength were analyzed.The results indicate that as the temperature increases,the color of RC specimens gradually lightens from dark to light,accompanied by varying degrees of cracking,spalling,and mass loss,with severe deterioration occurring at 800℃.The mass loss rate of RC peak at 700 ℃.Rubber particles and SCMs improve the failure mode of RC and enhance residual strength before 200 ℃,but mechanical strength of RC sharply declines after 400 ℃.Scanning electron microscopy analysis reveals that high-temperature leads to the increase of internal pores and cracks in RC,and the deterioration of the microstructure is the main cause for the degradation of macroscopic mechanical strength of RC.Based on the experimental data,functional formulas have been established between temperature and the loss rates of cubic compressive strength,splitting tensile strength,and flexural strength,providing theoretical support for the study of high-temperature performance of RC.关键词
橡胶混凝土/辅助胶凝材料/高温/损伤机制/强度退化/函数公式Key words
rubber concrete/supplementary cementitious materials/high-temperature/damage mechanism/strength degradation/functional formula分类
建筑与水利引用本文复制引用
周博文,郑泽中,马乾坤,黄文杰,张智雲,张继承..高温后掺辅助胶凝材料的橡胶混凝土力学强度与损伤机制[J].硅酸盐通报,2025,44(2):447-454,462,9.基金项目
国家自然科学基金(51778065) （51778065）
