再生细骨料级配对自流平砂浆强度的影响 -《混凝土与水泥制品》杂志社

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再生细骨料级配对自流平砂浆强度的影响

The Influence of Recycled Fine Aggregate Gradation on Strength of Self-leveling Mortar

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关键词：

再生细骨料；级配；强度；自流平砂浆

Key words：

Key words: Recycled aggregate; Gradation; Strength; Self-leveling mortar

刊期：

２０19年第7期

DOI：

10.19761/j.1000-4637.2019.07.096.05

文章编号：

基金项目：

国家重点研发计划项目（2017YFC0703305）。

作者：

侯云芬，郑东昊，周文娟

单位：

北京建筑大学，100044

摘要

摘要：选择4.75～1.18 mm、1.18～0.3 mm及0.3 mm以下三个级配的再生细骨料，采用Fuller法、K法和i法进行三级配再生细骨料的组成设计，研究了不同级配组成的再生细骨料对自流平砂浆强度的影响规律。结果表明，三种不同粒径的再生细骨料， Fuller法获得的级配组成中小颗粒较多，K法得到的级配组成中小颗粒较少；而三种方法得到的最佳级配组成所对应的砂浆强度中，Fuller法的抗压强度和抗折强度均最小，i法的强度最高，且在抗压强度与K法相近的同时表现出更高的抗折强度。最终认为，i法适合本实验再生细骨料的级配组成设计。

Abstract: In order to study the effect of recycled fine aggregate gradation on strength of self-leveling mortar, the gradation is designed by three methods of Fuller method, K method and i method, using three recycled fine aggregates whose gradation is 4.75～1.18 mm, 1.18～0.3 mm and under 0.3 mm. The results show that there are the most small particles in the gradation obtained by Fuller method and the least small particles in the gradation obtained by K method. The compressive strength and flexural strength of the mortar obtained by Fuller method are the smallest, the compressive strength obtained by i method is similar to that obtained by K method, but the flexural strength is higher than that obtained by K method. The i method is suited to design the gradation of recycled fine aggregate used in self-leveling mortar.

结论

（1）对于三种不同粒径的再生细骨料，Fuller法、K法和i法得到的最佳组成结果不同，其中，Fuller法获得的级配组成中小颗粒较多，K法得到的级配组成中小颗粒较少。

（2）三种方法得到的最佳级配组成所对应的砂浆强度中，Fuller法的抗压强度和抗折强度均最小，i法的强度最高，且在抗压强度与K法相近的同时表现出更高的抗折强度。

（3）i法适合本试验再生细骨料的级配组成设计。

参考文献

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[3] 齐秀山,李秋义,王军委.不同掺量的强化再生骨料与简单再生骨料对再生混凝土力学性能影响的试验研究[J].工程建设,2015,47(1):1-6.

[4] PEREIRA P，EVANGELISTA L，DE B J． The effect of superplas-ticisers on the workability and compressive strength of con-crete made with fine recycled concrete aggregates[J]． Construction and Building Materials,2012,28(1):722－729．

[5] 赖兆琼,黄红建,陈兆铭,等.FULLER曲线在管桩混凝土生产中的应用[J].广东建材,2013,29(7):15-18.

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引用本文

侯云芬,郑东昊,周文娟.再生细骨料级配对自流平砂浆强度的影响[J].混凝土与水泥制品,2019(7):96-100.

HOU Y F,ZHENG D H,ZHOU W J.The Influence of Recycled Fine Aggregate Gradation on Strength of Self-leveling Mortar[J].China Concrete and Cement Products,2019(7):96-100.

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