再生骨料混凝土空心砌块砌体抗压性能研究

The Compressive Performance of Recycled Aggregate Concrete Hollow Block Masonry

对不同再生骨料替代率(RA)下空心砌块、不同强度和不同RA的砂浆以及不同砂浆强度最优替代率组合后空心砌块砌体抗压性能进行试验研究。结果表明,RA为50%时再生砌块和砂浆强度最高;不同RA下设计强度Mb5.0的砂浆强度提高优于Mb7.5;在Mb5.0和Mb7.5砂浆设计强度下,无论是砂浆还是砌块掺入50%再生骨料均可提高再生砌块砌体强度,且均掺入50%的再生骨料强度最高。当RA一定,若砂浆和砌块强度相近,则对空心砌块砌体的强度提高更有利。

With different recycled aggregate replacement rate （ RA） of hollow block, under the different strength and different RA of mortar and mortar strength optimal combination after the replacement, hollow block masonry compressive performance is researched by experiment. The results show that mortar intensity of the recycled brick with RA 50% is highest; The increasing strength of mortar of Mb5？0 is better than that of Mb7？5 under different RA; Under the Mb5？0 and Mb7？5 mortar strength, mortar or block mixed with 50% recycled aggregates all can improve the regeneration of block masonry strength, and the block masonry strength is highest by mixing with 50% recycled aggregate. When RA has a selected value, the strength of mortar is similar with block. The intensity of hollow block masonry is improved better.