Mechanical and frost-resistance properties of rural area building waste hollow bricks |
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Authors: | Jun Liu Yao Li Miao Jiang and Honghong Zhou |
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Affiliation: | (1) Civil Engineering Department, Indian Institute of Technology, Kharagpur, 721302, India; |
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Abstract: | 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. |
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Keywords: | |
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