微粒混凝土基本力学特性及其影响参数的试验研究

发布时间：2018-06-17 03:15

本文选题：模型试验 + 正交试验　；参考：《世界地震工程》2016年04期

【摘要】：微粒混凝土主要用于混凝土结构模型试验,它是一种由小粒径骨料、水泥和水按一定比例组成的混凝土。由于骨料粒径变小引起了混凝土力学性能的改变,确定微粒混凝土的力学性能的影响因素是模型试验的一个关键问题。主要考虑水泥强度等级、水灰比和砂率的影响,采用正交试验法设计微粒混凝土的配合比,制作了两批试件,各16组,研究了上述因素对微粒混凝土轴心抗压强度和弹性模量的影响。结果表明,水泥强度等级和水灰比对微粒混凝土轴心抗压强度的影响显著,且水泥强度等级影响最大;水灰比和砂率对微粒混凝土弹性模量的影响显著,且水灰比影响最大。
[Abstract]:The concrete structure model test is mainly used for concrete structure model test, it is a kind of concrete with small size aggregate, cement and water in a certain proportion. Due to the small size of the aggregate, the mechanical properties of concrete are changed. It is a key problem to determine the influence factors of the mechanical properties of the particle concrete. The main consideration is water. With the influence of mud strength grade, water cement ratio and sand ratio, orthogonal test method was used to design the mixture ratio of particle concrete. Two batches of specimens were made and 16 groups were made. The effect of the above factors on the axial compressive strength and modulus of elasticity of particle concrete was studied. The results showed that the cement strength grade and cement ratio were compared with the axial compression strength of particle concrete. The influence of cement strength grade is the most significant, and the water cement ratio and sand rate have a significant effect on the elastic modulus of particulate concrete, and the water cement ratio has the greatest influence.
【作者单位】：中南大学土木工程学院;高速铁路建造技术国家工程实验室;
【基金】：国家自然科学基金项目(50938008,51108466) 长江学者和创新团队发展计划资助项目(IRT1296)
【分类号】：TU528

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