Mechanical and Frost-resistance Properties of Rural Area Building Waste Hollow Bricks

作者：Liu Jun^*; Li Yao; Jiang Miao; Zhou Honghong

来源：Journal of Wuhan University of Technology-Materials Science Edition, 2010, 25(6): 1017-1021.

DOI：10.1007/s11595-010-0141-9

• replacement rate
• waste clay brick
• mechanical properties
• frost-resistance properties
• microstructure

Serving as recycled coarse aggregate, the pretreated rural building waste was added into the concrete hollow bricks in the varying replacement of 0, 20%, 40%, 60%, 80% and 100%. By testing its compressive strength, flexural strength, mass and strength loss after freeze-thaw cycles, the impact of the different replacement on mechanical and frost-resistance properties of concrete hollow bricks was presented through SEM analysis. The experimental results show that, with the increase in recycled coarse aggregate replacement rate, the mechanical and frost-resistance properties show a downward trend; when the replacement rate is 40%, 28 d compressive strength and flexural strength of concrete hollow brick demonstrate the good peak value which meet the requirement of the national standard for ordinary small concrete hollow bricks; the interfacial structures of the pretreated recycled concrete is more complicated than those of concrete made of natural aggregate, but the former enjoys better interface bonding and tight structure.

• 出版日期2010-12
• 单位沈阳建筑大学