风积沙混凝土的基本力学性能试验研究

摘要

用风积沙按一定的比例（质量比为0、10%、30%、50%、70%、90%）替代相同质量河砂，经过配合比设计，制成风积沙混凝土，测定其和易性；然后再制作成不同尺寸立方体、棱柱体试件，测定其抗压强度和劈裂抗拉强度，确定风积沙最佳替代比例。试验结果表明，当风积沙替代比例为30%时，风积沙混凝土的和易性良好，能够满足施工要求，不同尺寸试件的抗压强度值和抗拉强度值都达到最大值。进一步分析试验结果，建立了风积沙混凝土不同尺寸立方体抗压强度之间的数学关系、轴心抗压强度和标准立方体抗压强度的数学关系以及抗拉强度和标准立方体抗压强度之间的数学关系，研究结果为风积沙混凝土的设计和应用提供一定的理论依据。%Through the design of mixture ratio, to make up the aeolian sand concrete, river sand is replaced with the same quality aeolian sand according to certain proportion (mass ratio is 0, 10%, 30%, 50%, 70%, 90%), its workability is determined. And then groups of cubes with different dimensions and prism specimens are prepared. The compressive strength and tensile strength are determined. The best replacement ratio of aeolian sand is determined. The test results show that when the replacement ratio of the aeolian sand is 30%, its workability is best and the compressive strength and tensile strength of different size specimens are largest. Further analyzing test results, the mathematical relationship of the aeolian sand concrete is set up between the cube compressive strength of different sizes, between axial compressive strength and standard cube compressive strength and between tensile strength and standard cube compressive strength. The results of the study provide certain theoretical basis for the design and application of the aeolian sand concrete.