废弃混凝土再生粗骨料对混凝土性能的影响
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摘要
用废弃C15混凝土试块制备的再生粗骨料部分或全部替代碎石拌制混凝土,探讨了再生粗骨料替代率对不同强度等级混凝土和易性和抗压强度的影响。结果表明:替代率较小时对混凝土和易性有所改善,但较大时会引起混凝土坍落度下降。当替代率增大,低等级混凝土抗压强度略微增加,中高等级混凝土抗压强度逐渐下降。
C15 waste concrete blocks were prepared to produce the recycled coarse aggregate,and it replaced gravel in concrete partially or completely. The effect of recycled coarse aggregate replacement rate on the workability and compressive strength of different strength grade concrete were investigated. The results showed that low replacement rate improved workability of concrete,high replacement rate reduced the slump of concrete. The compressive strength of low strength grade concrete slightly increased with the replacement rate increases,but the compressive strength of mid or high strength grade concrete decreased.
C15 waste concrete blocks were prepared to produce the recycled coarse aggregate,and it replaced gravel in concrete partially or completely. The effect of recycled coarse aggregate replacement rate on the workability and compressive strength of different strength grade concrete were investigated. The results showed that low replacement rate improved workability of concrete,high replacement rate reduced the slump of concrete. The compressive strength of low strength grade concrete slightly increased with the replacement rate increases,but the compressive strength of mid or high strength grade concrete decreased.
引文
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[4]张金喜,张建华,邬长森.再生混凝土性能和孔结构的研究[J].建筑材料学报,2006,9(2):142-147.
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[6]朋改非,黄艳竹,张九峰.骨料缺陷对再生混凝土力学性能的影响[J].建筑材料学报,2012,15(1):80-84.
[7]侯永利,郑刚.再生骨料混凝土不同龄期的力学性能[J].建筑材料学报,2013,16(4):683-687.
[8]李秋义,全洪珠,秦原.再生混凝土性能与应用技术[M].北京:中国建材工业出版社,2010:34-45.
[2]张晓华,孟云芳,任杰.浅析国内外再生骨料混凝土现状及发展趋势[J].混凝土,2013(7):80-83.
[3]石发恩,朱萌萌,柯瑞华,等.废弃混凝土资源化研究进展[J].有色金属科学与工程,2014,5(6):120-124.
[4]张金喜,张建华,邬长森.再生混凝土性能和孔结构的研究[J].建筑材料学报,2006,9(2):142-147.
[5]冯乃谦,张智峰,马骁.生态环境与混凝土技术[J].混凝土,2005(3):3-8.
[6]朋改非,黄艳竹,张九峰.骨料缺陷对再生混凝土力学性能的影响[J].建筑材料学报,2012,15(1):80-84.
[7]侯永利,郑刚.再生骨料混凝土不同龄期的力学性能[J].建筑材料学报,2013,16(4):683-687.
[8]李秋义,全洪珠,秦原.再生混凝土性能与应用技术[M].北京:中国建材工业出版社,2010:34-45.