Influence of sewage sludge ash on the properties of ultra-high performance concrete
Sewage sludge ash(SSA),as the major municipal solid waste,is difficult to be efficiently disposed of.Prepare ultra-high performance concrete(UHPC)by adding SSA internally,and study and analyze the influence of SSA on the flowability,setting time,and strength of UHPC.Based on this,carry out autogenous shrinkage and dry shrinkage tests of UHPC with SSA added.The research results indicate that the addition of SSA can reduce the flowability of UHPC and accelerate its condensation rate.The compressive and flexural strength of UHPC first increase and then decrease with the increase of SSA content.When 10％SSA is added,the flexural and compressive strength of UHPC is the highest.The addition of SSA effectively reduced the self-shrinkage and dry shrinkage of UHPC.When 30％SSA was added,compared to the control group,the 28 day self-shrinkage and dry shrinkage of UHPC were reduced by 60.6％and 31.6％,respectively,showing a significant reduction effect.
万方数据
维普
