摘要
采用水泥石膏相似材料制作标准试件模型,应用正交试验设计方法,以砂胶比、水泥石膏比、重晶石/骨料为3个因素,每个因素设置5个水平,设计了25组材料配比试验,进行了称重、单轴压缩、劈裂试验,获得了不同配比相似材料的密度、抗压强度、抗拉强度等物理力学性质指标。试验结果表明:不同配比的相似材料物理力学指标分布的范围较大,能够满足不同性质岩体模型试验对岩体相似材料的要求。基于MATLAB计算软件编制了用于正交试验设计和回归分析的软件,得到由水泥石膏相似材料密度、抗压强度和抗拉强度指标推算材料配比的经验公式。在以后的水泥石膏相似材料配比试验中可以用上述经验方程根据欲得到的材料物理力学指标进行配比设计。
The sand-cement ratio, the ratio of cement to gypsum and barite percentage of the total aggregate were select- ed as three factors, and every factor had five variable levels. According to twenty five schemes of material mixture ratio de- signed by orthogonal design method, shape volume testing, weighing, moisture content rate test, laboratory uniaxial compres sion test and split test were conducted. The tests results show that physical and mechanical indexes of similar material vary in a large range and can meet the needs for rock similar material in different physical model test of rock slope. Write a procedure for regression analysis based on MATLAB. Set the sand-cement ratio as X1 , the ratio of cement to gypsum as X2, barite per- centage of the total aggregate as X3, density indicators as Y1 , compressive strength indicators as Y2, tensile strength indicators as Y3. Do regression analysis for the relationship between X1 ,X2 ,X3 and Y1 ,Y2 ,Y3 by using the procedure, and obtained the empirical formula of the cement ~〉 plaster similar material density, compressive strength and tensile strength. We can calculate the material ratio by physical and mechanical indicators of similar material with the empirical equation based on the mix design.
出处
《岩土工程技术》
2015年第2期65-68,108,共5页
Geotechnical Engineering Technique
基金
国家科技支撑计划项目"盾构施工煤矿长距离斜井关键技术研究与示范"--课题六"煤层开采对斜井管片结构稳定性影响规律研究"(编号:2103BA10B06)
关键词
模型试验
水泥石膏相似材料
正交试验设计
配比设计
MATLAB
model test
cement ＆ plaster similar material
orthogonal experimental design method
proportioningtest
MATLAB
