珊瑚礁砂海水混凝土的配合比设计与抗压强度规律

发布时间：2018-10-05 06:58

【摘要】：基于国内外珊瑚混凝土研究现状和高性能轻骨料混凝土的配合比设计原理,设计了4组净水胶比(W/B)为0.25~0.40的珊瑚礁砂海水混凝土,研究了标准养护龄期和W/B对珊瑚礁砂海水混凝土立方体抗压强度(f_(cu))的影响。结果表明:珊瑚礁砂海水混凝土f_(cu)随着养护龄期的延长而增大,在养护初期,其f_(cu)增长速度较快,超过7 d时f_(cu)的增长速度逐渐减慢,并逐步趋于稳定;在养护初期时珊瑚礁砂海水混凝土f_(cu)增长速度相对普通混凝土f_(cu)要快,但是在养护后期,由于骨料的强度对混凝土强度的影响起重要作用,珊瑚礁砂海水混凝土28 d f_(cu)的增长速度反而比普通砂石混凝土28 d f_(cu)要小;珊瑚礁砂海水混凝土f_(cu)随着净胶水比(B/W)的增大而增大,两者之间较好地符合线性关系。
[Abstract]:Based on the current research situation of coral concrete at home and abroad and the design principle of high performance lightweight aggregate concrete, four groups of coral reef sand seawater concrete with water / binder ratio (W / B) of 0.25 ~ 0.40 are designed. The effects of standard curing age and W / B on cube compressive strength (f _ (cu) of coral reef sand seawater concrete were studied. The results show that the F _ (cu) of coral reef sand seawater concrete increases with the prolongation of the curing age. At the early stage of curing, the growth rate of f _ (cu) is relatively fast, and the growth rate of f _ (cu) gradually slows down and tends to be stable when it exceeds 7 days. In the early stage of curing, the growth rate of F _ (cu) of coral reef sand seawater concrete is faster than that of ordinary concrete, but in the later stage of curing, the strength of aggregate plays an important role in the influence of concrete strength. The growth rate of 28 d f _ (cu) of coral reef sand seawater concrete is smaller than that of ordinary sand concrete 28 d f _ (cu), and the F _ (cu) of coral reef sand seawater concrete increases with the increase of net glue ratio (B / W), which is in good agreement with the linear relationship between them.
【作者单位】：海军工程设计研究院;
【基金】：国家自然科学基金项目(51508272)
【分类号】：TV431

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