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《Journal of Guangxi University(Natural Science Edition)》 2016-02
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Mechanical and thermal properties of ceramsite foamed concrete prepared with chemical foaming method

WANG Kang;CHEN Guo-xin;College of Hydraulic and Civil Engineering,Xinjiang Agricultural University;  
In order to improve crack resistance and thermal properties of foamed concrete,hydrogen peroxide,ceramsite,glazed hollow bead,glass fiber,and cement were used to prepare glass fiberreinforced ceramsite foamed concrete blocks with the chemical foaming method. A single factor control variate method was used to test the blocks,and the effect of various factors on mechanical and thermal properties of the concrete was analyzed. An optimal mixture ratio was obtained through a multiple linear regression analysis. The splitting tensile strength of the foamed blocks was between0. 80 MPa and 0. 90 MPa,and the compressive strength was between 7. 0 MPa and 8. 0 MPa. Results show that the brittleness of foamed concrete corresponds with the increase of the hydrogen peroxide and glazed hollow bead contents. Glass fiber can improve the splitting tensile strength and thermal performance of foamed concrete. When the hydrogen peroxide,glass fiber and glazed hollowbeads are 7. 5%,1. 0%,8. 5% and 8. 5% of the cement mass content,respectively,the thermal conductivity of foamed concrete is 0. 203 W /( m·k),the splitting tensile strength is 0. 81 MPa,and the compressive strength is 7. 3 MPa. Glass fiber-reinforced ceramsite foamed concrete prepared with the chemical foaming method,have high ratio of tension to compression and good thermal properties.
【Fund】: 国家自然科学基金资助项目(11242007);; 新疆维吾尔自治区优秀青年科技创新人才培养项目(2014721012);; 中国科学院"西部之光"人才培养计划项目(RCPY201208)
【CateGory Index】: TU528.2
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