Study on physical properties and engineering application of rolled desert sand lean concrete
Desert sand used in civil engineering has the potential value of engineering application and cement mortar influences its strength and economic indicators,in order to explore the balance between the two measures,seek to meet the requirements of strength and stiffness of the lowest cement mortar,the preparation of the proportion of different rolling desert sand under lean concrete block,the results showed that(1)The uniaxial compressive strength and elastic modulus increase linearly with the increase of cement content,but the increase of elastic modulus is less than that of strength.(2)From the angle of strength,it can be classified as soft rock,and from the angle of stiffness,it can be classified as hard soil.(3)Compared with the traditional compacted soil subgrade,it has higher strength and stiffness,good water stability,strong anti-scouring ability,and the characteristics of high porosity and high permeability are conducive to the discharge of interface water.The higher spatial stiffness and overall performance can slow down the uneven settlement of weak and other bad foundations.
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