摘要
为准确地配出满足相似模拟试验需求的低强度相似材料,以沙子为骨料,粉煤灰和石膏为胶结料,采用正交试验的方法进行配比试验研究.试验结果表明:不同配比相似材料的力学参数分布范围较大,能满足不同比例模拟试验对相似材料的要求;相似材料的抗压强度和弹性模量皆随砂胶比和胶结物比例的增加呈现明显的减小趋势,砂胶比与材料的抗压强度和弹性模量近似呈线性关系,胶结物比例与材料的强度和弹性模量近似呈现乘幂关系;采用极差分析法分析了砂胶比和胶结物比例的敏感度,并作出了其对相似材料力学参数影响的直观分析图,胶结物比例较砂胶比对材料的抗压强度和弹性模量的影响皆更为显著.该成果对相似模型材料配比的选取具有定的参考价值和指导意义.
In order to confect the low strength similar material accurately which can meet the requirement to similar simulation test, the similar material mixed by sand, flyash and plaster was studied by orthogonal design. The tests results show that mechanical indexes of similar material vary in a large range and can meet the needs for similar material in different physical model test. The compression strength and elastic modulus of the similar material are both decreasing with the increase of sand-binder ratio and cement ratio. The relation between sand-binder ratio and compression strength of the material is linear relation, and the relation between sand-binder ratio and elastic modulus is the same. The relation between cement ratio and compression strength is power relation, and the relation between cement ratio and elastic modulus is the same. The sensitivity of sand-binder ratio and cement ratio was analyzed by using extremum difference method and the relationship between factors and parameters were studied by direct analysis charts of the factors affecting mechanical indexes. The influence of cement ratio to compression strength and elastic modulus is more remarkable than sand-binder ratio.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2014年第2期188-192,共5页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金资助项目(51274132
U1361105
51104094)
山东省自然科学基金重点资助项目(ZR2013EEZ001)
中国博士后科学基金特别资助项目(2013T60763)
教育部博士点基金资助项目(20133718110001)
教育部新世纪优秀人才支持计划基金资助项目(NCET-13-0880)
关键词
低强度
相似材料
正交配比
抗压强度
弹性模量
砂胶比
胶结物比例
极差分析
low strength
similar material
orthogonal design
compressive strength
elasticity modulus
sand-binderratio
cement ratio
extremum difference analysis
