再生細(xì)骨料對(duì)混凝土塑性收縮開(kāi)裂性能影響
[Abstract]:Referring to the ICBO standard of the International Association of Building officials, the recycled fine aggregate particle size, substitution rate and water-cement ratio of concrete were analyzed by using the plate restraint test, the self-made plastic stress testing device and the mercury injection method. The influence of sand ratio on plastic stress, pore structure and plastic shrinkage cracking property of recycled fine aggregate concrete. The results show that the risk of plastic shrinkage cracking of recycled fine aggregate concrete decreases gradually with the decrease of the particle size range of recycled fine aggregate, and the risk of plastic shrinkage cracking increases with the increase of replacement ratio of recycled fine aggregate. The water-cement ratio of recycled fine aggregate concrete is very important to its plastic shrinkage cracking resistance, too large or too small can increase the risk of plastic shrinkage cracking, and the degree of plastic shrinkage cracking of recycled fine aggregate concrete can be controlled by selecting appropriate sand ratio.
【作者單位】: 浙江大學(xué)寧波理工學(xué)院綠色建材與廢棄物資源化研究中心;浙江弛成建設(shè)有限公司;
【基金】:浙江省自然科學(xué)基金資助項(xiàng)目(LY13E080012) 寧波創(chuàng)新團(tuán)隊(duì)項(xiàng)目(2011B81005) 寧波市社會(huì)發(fā)展項(xiàng)目(2011C50018)
【分類號(hào)】:TU528.041
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