Effects of lithium slag from lepidolite on Portland cement concrete

The effects of lithium slag from lepidolite on the workability, mechanical properties, and parts of the durability of concrete were investigated. SEM was used to observe and analyze the interface structure of lithium slag concrete. The results show that adding a moderate amount of lithium slag can improve the workability and mechanical properties of concrete; and its anti-impact property will be enhanced significantly. Adding 20% lithium slag can improve the impact resistance of concrete by 45%. And the study of the interface structure shows that lithium slag can consume calcium hydroxide effectively, bring more amount of gels, inhibit the formation of ettringite, and enhance the density of concrete.