- 高 琦1,2,3，肖建庄1，赵艳娜2,3，王浩通2,3，王 媛2,3
引用本文摘 要：利用含红砖的再生细骨料100%替代天然砂，制备生态干混砂浆，研究了用水量、再生粉料掺量和外加剂掺量对干混砂浆力学性能的影响。结果表明：当再生粉料和外加剂掺量不变时，砂浆强度随着用水量的增大而降低，但56 d强度增长率反而增大；当再生粉料掺量和用水量不变时，外加剂掺量的增加对砂浆各龄期的强度均有负面影响；当外加剂掺量和用水量不变时，再生粉料掺量为20%时，对应的砂浆强度最大，低于或高于此掺量均会使砂浆强度降低；含红砖再生细骨料干混砂浆的后期强度（56 d）仍有较大提升空间。 Abstract: The dry mixed mortar was prepared with 100% recycled fine aggregate containing crushed red brick instead of natural sand. The effects of different water addition, recycled powder content and admixture content on the mechanical properties of dry mixed mortar were studied. The results show that when the recycled powder content and admixture content are constant, the strength of the mortar decreases with the increase of water addition, while the growth rate of 56 d strength increases. When the recycled powder content and the water addition remain unchanged, the increase of admixture content has a negative impact on the strength of the mortar at all ages. When the admixture content and the water addition remain unchanged, the mortar with 20% recycled powder has the highest strength, and the strength of the mortar is reduced when the content is lower or higher than 20%. There is still a large increase space in the late strength (56 d) of dry mixed mortar with red brick recycled fine aggregate.
高琦,肖建庄,赵艳娜,等.再生细骨料干混砂浆力学性能试验研究[J].混凝土与水泥制品,2021(3):93-96. GAO Q,XIAO J Z,ZHAO YN,et al.Experimental Study on Mechanical Properties of Dry Mixed Mortar with Recycled Fine Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(3):93-96.