摘要
钻芯法检测混凝土强度时,骨料粒径决定了芯样的直径,芯样直径最少要为2倍以上骨料粒径.以农田水利工程薄壁构件为例,研究20mm细石粒径骨料的预制构件混凝土实体强度检测方法,在尽量减少骨料粒径因素的前提下,研究了40mm芯样直径与28d龄期150mm试块强度的关系,并推定了该直径芯样的对数函数关系式及相应曲线.可为混凝土预制构件小直径芯样强度检测方法提供一定的借鉴.
Aggregate size determines core sample diameter in the concrete strength inspection by core drilling method,and the core sample diameter is 2 times higher than the aggregate size.Taking the thin-walled member of irrigation and drainage engineering as an example,this paper has studied the test methods of concrete strength of the precast element which composed of fine aggregate with a diameter of 20mm.In addition,the relation between the core sample with a diameter of 40mm and the strength of 28d cube specimens with a dimension of 150 mm has been studied.The logarithmic function relation and corresponding curves of the core sample with a diameter of 40mm have been put forward.It provides reference for the test methods of concrete strength of small diameter precast element.
作者
曹俊峰
徐利剑
戴国强
CAO Junfeng;XU Lijian;DAI Guoqiang(Lushan Municipal Water Resources Bureau of Jiangxi Province,Lushan 332800,China;Jiangxi Institute of Water Sciences,Nanchang 330029,China)
出处
《江西水利科技》
2019年第6期425-427,434,共4页
Jiangxi Hydraulic Science & Technology
基金
江西省水利厅科技项目(KT201745,BZ201702,KT201710,201820ZDKT03)
关键词
钻芯法
粒径
农田水利
薄壁构件
Core drilling method
Diameter
Farmland water conservancy
Thin-walled members
