基于城市红砖建筑垃圾再生细骨料的可控性低强度材料制备（英文）

发布时间：2018-04-13 23:18

本文选题：可控性低强度材料 + 城市红砖建筑垃圾再生细骨料　；参考：《Journal of Southeast University(English Edition)》2017年04期

【摘要】：采用不同的灰砂比和水固比,利用富含城市红砖的建筑垃圾再生细骨料制备了16种可控性低强度材料(CLSM).通过改进的试验方法测试了新拌CLSM混合料的流动性和泌水率,以及硬化后CLSM混合料的抗压强度和耐久性.试验结果表明,利用城市红砖建筑垃圾再生细骨料制备的CLSM混合料的流动度在105～227 mm之间,相应的泌水率在3.7%～15.5%之间,且随流动度的增加而增大.养护28 d后,硬化后CLSM混合料的抗压强度可以达到1.15～13.96 M Pa,且其强度随养护龄期的延长仍能增大.而且,在相同的养护龄期,CLSM混合料的强度随灰砂比的增加而增大,随水固比的增加而减小.基于试验数据,建立了以灰砂比和水固比为变量的抗压强度预测模型,具有较好的精度.此外,有着更高灰砂比的CLSM混合料具有较好的耐久性.
[Abstract]:Using different ratio of lime to sand and water to solid, 16 kinds of controllable low strength materials were prepared by using recycled fine aggregate of city red brick.The fluidity and bleeding rate of fresh CLSM mixture, the compressive strength and durability of hardened CLSM mixture were tested by the improved test method.The experimental results show that the fluidity of CLSM mixture prepared from recycled fine aggregate of red brick construction waste is between 105 mm and 227 mm, and the corresponding bleeding rate is between 3.715% and 15.5%, and increases with the increase of flowability.After 28 days of curing, the compressive strength of hardened CLSM mixture can reach 1.15 ~ 13.96 MPA, and its strength can increase with the extension of curing age.In addition, the strength of CLSM mixture increases with the increase of lime-sand ratio and decreases with the increase of water-solid ratio at the same curing age.Based on the experimental data, a prediction model of compressive strength with the ratio of lime to sand and the ratio of water to solid is established, which has good accuracy.In addition, CLSM mixture with higher lime sand ratio has better durability.
【作者单位】：北京工业大学交通工程北京市重点实验室;高速公路养护技术交通行业重点实验室(济南);Department
【基金】：The National Science and Technology Support Program of China(No.2014BAC07B03) the Science and Technology Project of Transportation Committee of Beijing Government(No.2016-LZJKJ-01-006) the National Natural Science Foundation of China(No.51278016)
【分类号】：TU528

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