Compressive and thermal properties of foamed concrete at high temperature

被引:13
作者
Xi, Huifeng [1 ,2 ,3 ]
Yao, Yiming [4 ,5 ]
Sun, Yuanfeng [5 ]
Mobasher, Barzin [6 ]
Liu, Yiping [7 ]
Ma, Hongwei [8 ]
机构
[1] Jinan Univ, Coll Mech & Construct Engn, Guangzhou, Peoples R China
[2] Jinan Univ, MOE Key Lab Disaster Forecast & Control Engn, Guangzhou, Peoples R China
[3] Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian, Peoples R China
[4] Southeast Univ, Minist Educ, Engn Res Ctr Safety & Protect Explos & Impact, Nanjing, Peoples R China
[5] Southeast Univ, Sch Civil Engn, Nanjing, Peoples R China
[6] Arizona State Univ, Sch Sustainable Engn & Built Environm, Tempe, AZ USA
[7] South China Univ Technol, Sch Civil Engn & Transportat, Guangzhou, Peoples R China
[8] Dongguan Univ Technol, Sch Environm & Civil Engn, Dongguan, Peoples R China
基金
中国国家自然科学基金;
关键词
Foamed concrete; compressive behavior; thermal conductivity; elevated temperature; constitutive relation; FLY-ASH; AERATED CONCRETE; FIRE RESISTANCE; MECHANICAL-PROPERTIES; SIZE DISTRIBUTION; STRENGTH; CONDUCTIVITY; CEMENT; POROSITY; WORKABILITY;
D O I
10.1080/21650373.2021.1961639
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Foamed concrete is an attractive material for structural use and insulation of buildings, which can replace flammable organic insulating materials on the market. This study investigated the compressive and thermal properties of the plain, fly ash and expanded polystyrene (EPS) foamed concrete ranging widely in density from 180 to 1800 kg/m(3). Furthermore, the compressive strength of the plain foamed concrete was analyzed at four density levels of 180, 325, 450, and 595 kg/m(3) and at four temperatures of room temperature, 300, 600, and 900 degrees C to quantify its fire resistance. The compressive strength of the foamed concrete dramatically declined, and it suffered severe damage when the temperature was higher than 300 degrees C. A constitutive stress-strain model incorporating the compressive strength-density relationship and the temperature effects was also proposed for the plain foamed concrete. The findings may provide new perspectives on the existing design codes for energy efficiency and fire protection.
引用
收藏
页码:353 / 369
页数:17
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