水泥改良BRAC混填料无侧限抗压强度试验

Unconfined Compressive Strength Test of Cement-modified BRAC Mixed Fillers

建筑再生骨料与黏土混填料按最优含水率闷料24 h后,再向其中掺入适量固化剂,按最大干密度和压实度要求制备强度试件,并进行无侧限抗压强度试验,以考察建筑再生骨料含量、水泥掺量及不同养护龄期对压实力学特性与抗压强度的影响。试验结果表明,随着建筑再生骨料含量、水泥掺量、养护龄期的增加,混填料无侧限抗压强度增加,早期呈塑性破坏,养护后期呈脆性破坏,黏聚力和内摩擦角随再生骨料含量、水泥掺量和养护龄期的增加而增大,材料的抗压强度和水稳定性显著提高。

The strength specimens were prepared by adding appropriate curing agent to the mixture of building recycled aggregate and clay mixed filler(referred to as BRAC mixed filler)according to the requirements of maximum dry density and compactness.The unconfined compressive strength test was carried out to inv estigate the effects of recycled aggregate,cement content and dif ferent curing ages on the mechanical properties and compres sive strength.The results show that w ith the increase of recycled aggregate,cement content and curing time,the unconfined compressive strength of mixed fillers increases,and the mixed fillers show plastic failure at early stage and brittle failure at late curing stage.The cohesion and internal friction angle increase with the increase of recycled aggregate,cement content and age,which significantly improve the compressive strength and water stability of the mater ial.