骨料的相对比表面积对混凝土弹性模量影响  

Effect of RSSA of Aggregates on the Elastic Module of Concrete

作　　者：赵坤龙 吴文博 樊李浩 岳盼 闵永涛 曹郎郎 贺晶晶 ZHAO Kunlong;WU Wenbo;FAN Lihao;YUE Pan;MIN Yongtao;CAO Langlang;HE Jingjing(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China;Xi'an Thermal Power Research Institute Co.,LTD Xi'an 710048,China;NWE Branch of BeSTDR Infrastructure Hospital,Xi'an 710065,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065 [2]西安热工研究院有限公司,西安710048 [3]坝道工程医院西北水电分院,西安710065

出　　处：《西北水电》2024年第5期64-70,共7页Northwest Hydropower

基　　金：国家自然科学基金项目(5207090694).

摘　　要：为快速比选并确定工程的混凝土骨料料源,基于分形理论研究了不同岩性骨料的物理特征,提出骨料相对比表面积(RSSA)参数来快速表征不同骨料的可加工程度,并建立了骨料相对比表面积(RSSA)与混凝土弹性模量的关系。结果表明:骨料的RSSA与母岩中的坚固矿物成分、矿物粒径大小关系密切,且坚固矿物成分的微粒含量与破碎后的骨料的RSSA成正相关,而骨料的RSSA与其细度模数、表观密度呈负相关,与石粉含量、压碎指标呈正相关;相同强度等级下,所制成混凝土水胶比、弹性模量与骨料的RSSA基本呈线性递减关系。In order to quickly select and determine the concrete aggregate material source of the project,the physical characteristics of different lithology aggregates are studied based on the fractal theory,and the relative specific surface area(RSSA)parameter of aggregates is proposed to quickly characterize the processibility of different aggregates,and the relationship between the relative specific surface area of aggregates(RSSA)and the elastic modulus of concrete is established.The results show that the RSSA of aggregates is closely related to the solid mineral composition and mineral particle size in the parent rock.And the particle content of the solid mineral component is positively correlated with the RSSA of the crushed aggregate.The RSSA of the aggregate is negatively correlated with the fineness modulus and apparent density of the aggregate,and positively correlated with the rock powder content and the crushing index.Under the same strength grade,the water-binder ratio and the elastic modulus of the concrete are linearly decreasing with the RSSA of the aggregate.

关 键 词：分形理论 骨料 相对比表面积 混凝土 静压弹性模量 

分 类 号：TU528[建筑科学—建筑技术科学]