摘   要：分析了建筑垃圾再生细骨料在干混砂浆中应用的经济性，并对其在干混砂浆中应用时存在的问题进行了研究。结果表明，用建筑垃圾中红砖破碎的砖砂由于吸水率高，会造成砂浆2h稠度损失率严重超标，但通过技术手段可以使其有效降低，满足相关标准要求。另外，砖砂的加入会使砂浆早期强度逐渐降低，但随着砖砂掺量的增加，砂浆后期强度的增长率逐渐增加，使得砂浆28d抗压强度随砖砂掺量的增加呈先增加后降低的趋势。

Abstract: The economy of recycled fine aggregate of construction waste application in dry-mixed mortar is analyzed，and the problems that application in dry-mixed mortar are studied. The results show that the sands crushed by red brick of construction waste are very high in water absorption, which can make the ratio of consistency loss in 2h exceeds badly，but it can be lower which can meet the requirements of relevant standards by technical means. Besides,  the early strength of mortar gradually decreased when it is added into more red brick, the growth rate of mortar strength in long-term gradually increase when it is added into more red brick, which make the compressive strength of 28d gradually increase in the first and then decreased.