掺钢渣碎石封层的配合比设计与路用性能
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摘要
为提高钢渣的利用率,把钢渣添加到碎石封层中替代部分碎石集料的可行性。首先通过工程经验法计算出碎石封层的初步配合比,通过室内剪切试验和拉拔试验确定最终配合比,然后进行钢渣碎石封层渗水试验、构造深度试验和膨胀率试验。结果表明:封层构造深度随钢渣掺量的增加线性增大,膨胀率也随钢渣掺量的增加而增大,但未超出规范要求,因此钢渣可用于碎石封层,是一种优质集料。
In order to improve the utilization rate of steel slag,the feasibility of adding steel slag to chip seal to replace part of the aggregate was studied.Firstly,the preliminary mix ratio of chip seal was calculated by engineering experience,and the final mix ratio was determined by laboratory shear test and pull-out test.Then,the seepage test,structural depth test and expansion rate test of chip seal with steel slag were carried out.The results show that the structural depth of chip seal increases linearly with the increase of steel slag content,and the expansion rate increases with the increase of steel slag content,but it does not exceed the specification requirements.Therefore,steel slag can be used in chip seal and is a kind of highquality aggregate.
In order to improve the utilization rate of steel slag,the feasibility of adding steel slag to chip seal to replace part of the aggregate was studied.Firstly,the preliminary mix ratio of chip seal was calculated by engineering experience,and the final mix ratio was determined by laboratory shear test and pull-out test.Then,the seepage test,structural depth test and expansion rate test of chip seal with steel slag were carried out.The results show that the structural depth of chip seal increases linearly with the increase of steel slag content,and the expansion rate increases with the increase of steel slag content,but it does not exceed the specification requirements.Therefore,steel slag can be used in chip seal and is a kind of highquality aggregate.
引文
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[2]王雅婷.钢渣集料在沥青路面超薄抗滑磨耗层中的应用研究[D].重庆:重庆交通大学,2013.
[3]孙家瑛,蒋华钦.钢渣微粉特性及其用于沥青混合料的试验研究[J].重庆交通大学学报(自然科学版),2008,27(4):576-579.
[4]王鑫.钢渣应用于路面磨耗层的研究[J].交通世界(建养·机械),2015(11):100-101.
[5]马培建,王佳蓉,王选仓.基于摩尔-库伦理论的沥青路面层间抗剪强度[J].长安大学学报(自然科学版),2012,32(2):34-38..
[6]张双艺.碎石封层在路面结构下封层中的应用[J].上海公路,2011(1):36-38.
[7]董哲.纤维沥青碎石封层配合比设计方法研究[J].公路工程,2015,40(2):40-44.
[8]郭寅川,申爱琴.沥青路面下封层力学响应及抗剪强度试验[J].中国公路学报,2010,23(4):20-26.
[9]杨永利,武建民,张建强.钢渣SMA-13型沥青混合料配合比设计及路用性能研究[J].筑路机械与施工机械化,2016,33(7):36-40.
[10]李伟,王成元,王达,等.钢渣沥青混合料路面层间剪切力学性能试验研究[J].公路,2017(4):36-41.
[11]周泽洪,郑南翔,纪小平.基于层间抗剪强度的同步碎石下封层的设计[J].长安大学学报(自然科学版),2011,31(2):21-24.
[12]张争奇,石伟,边参奇.纤维沥青碎石封层层间粘结性能及其影响因素[J].武汉理工大学学报,2014,36(2):54-59.
[13]刘丽,郝培文.同步碎石下封层层间抗剪强度影响因素分析[J].中外公路,2011,31(1):41-45.
[14]林天发.同步加纤碎石下封层配合比设计及路用性能研究[J].中外公路.2014,34(12):268-272.
[15]李曦.碎石封层性能影响因素试验研究[D].长沙:长沙理工大学,2009.