Experimental Study On The Basic Mechanical Properties Of Recycled Concrete Hollow Block Masonry

China is a country with extensive resources, but it's also a consuming country, and each year tens of thousands of construction waste will be generated. So it has excellent environmental and economic benefits for the recycling of construction waste. Based on the study of basic mechanical properties of regeneration mortar and recycled concrete hollow block masonry, the feasibility of recycled concrete hollow blocks is further proved, and some useful results are obtained.The basic physical properties of natural fine aggregate and recycled fine aggregate, is analyzed. The test results indicate that recycled fine aggregate has more micro fines than natural fine aggregate. And recycled fine aggregate, whose gradation shows a bit larger in the waist than in the upper and lower parts, is also thicker than natural fine aggregate. In addition, compared with the natural fine aggregate, recycled fine aggregate's apparent density and voidage has a certain degree of reduction, while the loose bulk density and the close packing density increased.The compressive strength of 60 regeneration mortar specimens, is analyzed. The test results indicate that the liquidity and consistency of regeneration mortar are increased, with the increase of the recycled fine aggregate's replacement ratio. While its compressive strength first decreased, then increased, and finally decreased. And it peaked at the replacement ratio of 50%.By 12 compressive strength of recycled concrete hollow block masonry specimens test and 24 shear strength of recycled concrete hollow block masonry specimens test, it can be drawned that some replacement ratio of regeneration mortar is helpful to the compressive strength and shear strength of recycled concrete hollow block masonry. And the compressive strength and shear strength of recycled concrete hollow block masonry are higher than the theoretical calculated value by the design of masonry structures. Finally, the coefficient to calculate the compressive strength and shear strength of recycled concrete hollow block masonry is also amended, that is k₁=0.59, k₅=0.1099。...