聚合物再生砂浆力学性能试验研究
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摘要
建筑固废弃物尤其是废弃混凝土材料的合理化利用,有利于节约环保,实现有效循环生产。利用废弃水泥混凝土制成的细骨料,替代部分普通砂,配制不同聚合物再生砂浆,研究不同再生砂掺配率下的砂浆力学性能变化规律。研究结果表明:再生细骨料取代天然砂在一定程度上可提高再生砂浆的抗折强度和抗压强度,在再生砂替代率为80%到100%时对抗折抗压强度提高效果较为明显;当其他条件一定时,聚合物再生砂浆抗折及抗压强度随着再生骨料中未发生水化反应的水泥含量的增加而增大。
The rational utilization of building solid waste, especially concrete materials, is conducive to the effective cycle production for the environmental protection. The fine aggregate that made of cement concrete waste was used to replace the traditional sand, and the different polymer recycled mortars were prepared to study the variation of mechanical properties of mortar under the blending rate of different recycled sands. The results show that the replacement of natural sand by recycled fine aggregate can improve the flexural strength and compressive strength of recycled mortar to a certain extent. As the replacement rate of reclaimed sand is 80% to 100%, the improvement of compressive strength is obtained. When other conditions are fixed, the flexural and compressive strength of the polymer recycled mortar increases with the cement content in the recycled aggregate without hydration reaction.
The rational utilization of building solid waste, especially concrete materials, is conducive to the effective cycle production for the environmental protection. The fine aggregate that made of cement concrete waste was used to replace the traditional sand, and the different polymer recycled mortars were prepared to study the variation of mechanical properties of mortar under the blending rate of different recycled sands. The results show that the replacement of natural sand by recycled fine aggregate can improve the flexural strength and compressive strength of recycled mortar to a certain extent. As the replacement rate of reclaimed sand is 80% to 100%, the improvement of compressive strength is obtained. When other conditions are fixed, the flexural and compressive strength of the polymer recycled mortar increases with the cement content in the recycled aggregate without hydration reaction.
引文
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[12]刘凤利,刘俊华,张承志.废弃混凝土再生混合砂砂浆性能正交试验研究[J].建筑技术,2014,45(4):341-345.
[2]许立军.聚合物水泥砂浆的研究及应用[J].中外建筑,2007(5):106-109.
[3]张磊,张小冬,黄莹,等.高性能聚合物修补砂浆的研究[J].硅酸盐通报,2010,29(4):988-991.
[4]李满,王俊佚,万展君,等.聚合物改性砂浆在混凝土修补中的应用[J].上海建设科技,2017(1):55-57.
[5]梁雪岩.聚合物砂浆在混凝土表面修补中的应用[J].低温建筑技术,2005(1):113-115.
[6]钟世云,袁华.聚合物在混凝土中的应用[M].北京:化学工业出版,2003.
[7]罗毅.单组分高强修补型聚合物砂浆的开发研究[J].硅酸盐通报,2008(5):85-86.
[8]赵卫东.聚合物砂浆用于补修构件[J].黑龙江水专学报,2005(3):116-117.
[9]陈冲.再生细骨料不同取代率对砂浆性能的影响[J].工业建筑,2016(52):3.
[10]李丹,张云莲,邓媛媛,等.再生细骨料逐级取代对再生砂浆强度和微观形貌的影响[J].硅酸盐通报,2016,35(11):3876-3880.
[11]邓媛媛.再生砂浆力学性能及微观形貌分析[D].杭州:浙江工业大学,2016.
[12]刘凤利,刘俊华,张承志.废弃混凝土再生混合砂砂浆性能正交试验研究[J].建筑技术,2014,45(4):341-345.