钢纤维全轻混凝土长期强度和碳化试验

发布时间：2018-03-06 07:39

本文选题：钢纤维全轻混凝土　切入点：长期强度　出处：《土木工程与管理学报》2017年02期 　论文类型：期刊论文

【摘要】：通过试验研究了水胶比和钢纤维体积率对钢纤维全轻混凝土长期强度和碳化性能的影响规律。试验采用连续级配烧结页岩陶粒、轻质陶砂和铣削型钢纤维,水胶比0.25~0.35,钢纤维体积率0.8%~1.6%。试验结果表明:钢纤维全轻混凝土抗压强度随龄期增加呈现早期快速、后期缓慢的增长规律,与28 d的强度值比较,增长率与水胶比和钢纤维体积率关系不大;抗拉强度在一定龄期内与抗压强度同比例增长,而后随龄期增加而缓慢降低;钢纤维全轻混凝土的碳化具有产生时间延迟、初期发展较缓的现象,碳化深度随水胶比增大而增加、随钢纤维体积率增大而减小,并呈现随碳化龄期增加而增大的规律。根据试验结果分析,提出了钢纤维全轻混凝土长期强度和碳化深度的预测计算公式。
[Abstract]:The effects of water binder ratio and steel fiber volume ratio on the long-term strength and carbonation properties of steel fiber total light concrete were studied. The ratio of water to binder is 0.25 ~ 0.35, and the volume ratio of steel fiber is 0.8 ~ 1.6. The experimental results show that the compressive strength of steel fiber whole light concrete increases rapidly and slowly with the increase of age, and compared with the strength value of 28 days. The growth rate is not related to the water / binder ratio and the volume ratio of steel fiber, the tensile strength increases in proportion to the compressive strength in a certain age, and then decreases slowly with the increase of age, and the carbonation of steel fiber whole light concrete has the delay of producing time. In the initial stage, the carbonation depth increases with the increase of water-binder ratio, decreases with the increase of steel fiber volume ratio, and increases with the increase of carbonation age. The prediction formulas of long term strength and carbonation depth of steel fiber full light concrete are presented.
【作者单位】：华北水利水电大学土木与交通学院;
【基金】：河南省高等学校重点科研项目(12A560008,16A560024) 河南省高校生态建筑材料与结构工程科技创新团队(13IRTSTHN002) 河南省新型城镇建筑技术协同创新中心科研课题(教科技[2013]638号)
【分类号】：TU528.572

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