In order to make use of industrial waste lithium slag and improve the resource utilization rate of lithium slag,the formulation of C25 lithium slag concrete was designed and studied.Based on the orthogonal test,the influence of lithium slag dosage(mass fraction),water-binder ratio and sand rate on the 3,7 and 28 d compressive strength of lithium slag concrete was studied,and microstructure of lithium slag concrete was observed by SEM tests,to analyze the influence mechanism of lithium slag on the internal structure of lithium slag concrete.The results show that the mixing amount of lithium slag has the greatest influence on the 3,7 and 28 d compressive strength of lithium slag concrete,followed by the water-binder ratio,and finally the sand rate;under the requirement of compressive strength,the optimal mix proportion of C25 lithium slag concrete is 10％lithium slag dosage,47％water-binder ratio and 37％sand rate;the lithium slag could participate in the internal reaction of concrete after its activity excitation,which could reduce the cracks inside the concrete structure,and make the concrete densification improved,thus enhancing the compressive strength of concrete.
万方数据
维普
