粗骨料表面构造及其对混凝土性能的影响  

Study on the Surface Texture of Coarse Aggregate and Its Influence on the Performance of Concrete

作　　者：黄亚梅[1] 王立华[2,3] 陈锡容 HUANG Yamei WANG Lihua CHEN Xirong(Guangdong Technical College of Water Resources and Electric Engineering, Guangzhou 510635, China Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510635, China Guangdong New Material and Structure Engineering Technology Research Center of Water Resources and Hydropower, Guangzhou 510635, China)

机构地区：[1]广东水利电力职业技术学院,广东广州510635 [2]广东省水利水电科学研究院,广东广州510635 [3]广东省水利新材料与结构工程技术研究中心,广东广州510635

出　　处：《人民黄河》2017年第9期129-134,共6页Yellow River

基　　金：广东省水利科技创新项目(2014-04)

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。For a long time, the study on the surface texture of concrete coarse aggregate has been stuck at the level of qualitative description and it difficultly to characterize quantitatively. Five parameters were proposed to characterize the surface texture of coarse aggregate, those comprise concavity, concavity ratio, circlar concavity, circlar concavity ratio and the length ratio of concavity to the circle. The surface tex- ture parameters of crushed limestone, crushed pebble and pebble were tested and compared. The stress between the interface of mortar and cylindrical aggregate with an isosceles triangular concavity were studied. It is found that the larger circlar concavity ratio and the length ratio of the concavity to the circle of the aggregate are more favorable to the improvement of concrete strength, which has been strongly supported by concrete experiment.

关 键 词：混凝土粗骨料 表面构造 混凝土性能 数字图形处理技术 

分 类 号：TV431[水利工程—水工结构工程]