粗骨料表面构造及其对混凝土性能的影响

发布时间：2018-04-01 06:56

  本文选题：混凝土粗骨料　切入点：表面构造　出处：《人民黄河》2017年09期

【摘要】：长期以来,混凝土骨料表面构造的研究一直停留在定性描述的水平,难以定量表征和研究。本文提出了表征骨料表面构造的5个指标:凹凸度、凹凸比、全周凹凸度、全周凹凸比和凹周比。测试了灰岩碎石、破碎卵石和卵石的表面构造,研究了具有等腰三角形断面凹槽的圆柱体骨料-浆体的界面应力,发现骨料凹周比和全周凹凸比越大,骨料对混凝土强度的贡献越大,对提高混凝土强度越有利,这一结论得到了混凝土性能试验的验证。
[Abstract]:For a long time, the research on the surface structure of concrete aggregate has remained at the level of qualitative description, which is difficult to quantitatively characterize and study. In this paper, five indexes of surface structure of aggregate are proposed: concave convexity, concave / convex ratio, full circumference concave convexity. The surface structure of limestone gravel, broken pebble and pebble was measured, and the interfacial stress of the cylindrical aggregate with isosceles triangle section groove was studied. It was found that the larger the concave circumference ratio and the full circumferential concave ratio of aggregate, the larger the concave circumference ratio and the full circumferential concave / convex ratio of aggregate. The greater the contribution of aggregate to the strength of concrete, the more favorable it is to improve the strength of concrete. This conclusion has been verified by concrete performance test.
【作者单位】： 广东水利电力职业技术学院;广东省水利水电科学研究院;广东省水利新材料与结构工程技术研究中心;
【基金】：广东省水利科技创新项目(2014-04)
【分类号】：TU528
，

本文编号：1694438