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Preparation of high strong concrete bricks added nickel slag

WANG Xiao;CAI Shang-yong;JIN Biao;YANG Liu-shuan;CHEN Feng;LA Huan;ZHAN Xue-wu;HUANG Yong-heng;School of Material and Chemical Engineering,Henan University of Urban Construction;Water Saving Management Office;  
Taking pretreatment of nickel slag as the main raw material,supplemented by 42.5 grade Portland cement and gravel,using vibration molding,natural conservation preparation of nickel slag concrete brick,the effects of nickel slag content,cement dosage and age on the strength of nickel slag concrete brick were studied emphatically.The results show that the content of nickel slag and the content of cement have obvious influence on the strength of nickel slag concrete brick.With the increase of nickel slag content,the compressive strength of the sample decreases gradually,and the flexural strength increases first and then decreases.When the mass ratio of nickel slag,cement and gravel is 5∶3∶2,the compressive strength and flexural strength of natural dredging are 20.97 MPa and 4.63 MPa respectively,which meet the requirements of MU20 strength grade.
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