钢纤维再生粗骨料混凝土碳化试验

发布时间：2018-06-15 22:27

本文选题：钢纤维 + 再生混凝土　；参考：《土木工程与管理学报》2017年02期

【摘要】：为了研究钢纤维体积率、再生粗骨料取代率及水灰比对混凝土抗碳化性能的影响,将实验室废弃的强度等级为C30的混凝土试块加工处理后制成粒径范围为5~31.5 mm的骨料,针对这种骨料按不同掺量,加入不同体积率的钢纤维,按照不同水灰比配制的钢纤维再生混凝土试样进行碳化试验。结果表明:其它相同条件下,钢纤维体积率在0.5%~1.5%,再生混凝土碳化深度明显较小;仅考虑再生粗骨料对碳化深度影响时,当再生粗骨料取代率为50%,碳化深度最小;同理,仅考虑水灰比,当水灰比为0.4时,混凝土抗碳化性能较好。通过对钢纤维再生混凝土抗碳化模型研究,并引入抗碳化系数α和β,得到了钢纤维再生混凝土的碳化龄期与碳化深度的模型。研究成果对钢纤维再生混凝土应用具有重要的理论意义。
[Abstract]:In order to study the effect of steel fiber volume ratio, regenerated coarse aggregate substitution rate and water-cement ratio on the carbonation resistance of concrete, the concrete sample with C30 strength grade abandoned in laboratory was processed to make the aggregate with a diameter of 5 ~ 31.5 mm. According to the different content of the aggregate and the different volume ratio of steel fiber, the carbonization test was carried out on the steel fiber recycled concrete sample prepared according to the different water-cement ratio. The results show that under the same conditions, the steel fiber volume ratio is 0.5 ~ 1.5 and the carbonation depth of recycled concrete is obviously smaller. When only the influence of recycled coarse aggregate on the carbonization depth is considered, the carbonation depth is the lowest when the ratio of replacement of recycled coarse aggregate is 50. When the water-cement ratio is 0.4, the carbonation resistance of concrete is better. The carbonation age and carbonation depth of steel fiber recycled concrete are obtained by studying the carbonization resistance model of steel fiber recycled concrete and introducing the carbonation resistance coefficient 伪 and 尾. The research results have important theoretical significance for the application of steel fiber recycled concrete.
【作者单位】：安阳工学院土木与建筑工程学院;郑州大学土木工程学院;
【基金】：河南省科技攻关计划(重点)项目(152102310204) 2016年度河南省高校重点科研项目(16B560001) 安阳市科技攻关计划项目(2016122190) 大学生科技创新项目(AGKC-ZK-2016083)
【分类号】：TU528.59

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