微小直径芯样法减小直径芯样抗压强度离散性的一种试验方法  

An Experimental Method Applying Tiny Core Sample Method to Reduce the Discreteness of Compressive Strength

作　　者：张海飞[1,2] 刘清山[1] 

机构地区：[1]河南大学土木建筑学院 [2]中国人民解放军61825部队

出　　处：《河南大学学报（自然科学版）》2014年第3期375-378,共4页Journal of Henan University:Natural Science

摘　　要：基于"集零为整"的思想提出一种试验方法,利用石材粘贴胶将钻取并切割好的小直径芯样3个为1组黏结在一起组成1个当量直径较大的芯样进行受压试验.这种方法增加了芯样的当量直径,从而削弱了骨料最大粒径对芯样直径的限制,扩大了钻芯法的应用范围.实验结果表明,该方法芯样破坏形态较好,检测数据的变异系数稳定在4%左右,其离散性大大降低并能够满足相应的试验标准.Based on the thought of breaking up the whole into parts,this paper puts forward an experimental method.This method is to make a core sample with a bigger equivalent diameter by sticking three well drilled and cut core samples together using adhesive to resist the strength jointly.By increasing the equivalent diameter of core samples,this method weakens the limitation of maximum aggregate size on core diameter and expends the applied scope of core drilling method.The experimental results show that the shape of damaged core samples is good;and the coefficient of variation falls stablely in about 4%.In addition,the discreteness is greatly reduced and can meet the corresponding test standard.

关 键 词：小直径芯样 离散性 混凝土 变异系数 

分 类 号：TU502.6[建筑科学—建筑技术科学]