乳化再生废旧水泥稳定碎石力学性能试验研究
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摘要
利用乳化沥青对废旧水泥稳定碎石进行再生利用,可以有效节约建设资源。鉴于乳化再生废旧水泥稳定碎石(ER-OCSM)的力学性能是反映其路用品质的重要方面。为此,通过开展室内试验,测试并分析了乳化沥青含量、龄期对ER-OCSM力学性能指标(无侧限抗压强度、劈裂强度、弹性模量)的影响规律及作用机理。结果表明:随着龄期增长,ER-OCSM混合料的无侧限抗压强度、劈裂强度逐渐增加,弹性模量先增后降。随着乳化沥青含量增加,ER-OCSM无侧限抗压强度、劈裂强度、弹性模量整体呈现逐渐降低的趋势,乳化沥青增柔作用比较明显。研究成果为ER-OCSM的应用奠定基础。
The recycling of discarded cements stabilized macadam with emulsified asphalt can effectively save construction resources. In view of the mechanical properties of the emulsive regenerated discarded cement stabilized macadam(ER-OCSM) is an important aspect to reflect its road quality. Therefore, the influence of emulsified asphalt content and age on the mechanical properties of ER-OCSM(unconfined compressive strength, splitting strength,modulus of elasticity) was tested and analyzed through laboratory tests. The results show that with the increase of age, the unconfined compressive strength and splitting strength of ER-OCSM mixture increase gradually, and the elastic modulus increases first and then decreases. With the increase of emulsified asphalt content, the unconfined compressive strength, splitting strength and elastic modulus of ER-OCSM decrease gradually, and the flexibility of emulsified asphalt is obvious. The research results lay the foundation for the application of ER-OCSM.
The recycling of discarded cements stabilized macadam with emulsified asphalt can effectively save construction resources. In view of the mechanical properties of the emulsive regenerated discarded cement stabilized macadam(ER-OCSM) is an important aspect to reflect its road quality. Therefore, the influence of emulsified asphalt content and age on the mechanical properties of ER-OCSM(unconfined compressive strength, splitting strength,modulus of elasticity) was tested and analyzed through laboratory tests. The results show that with the increase of age, the unconfined compressive strength and splitting strength of ER-OCSM mixture increase gradually, and the elastic modulus increases first and then decreases. With the increase of emulsified asphalt content, the unconfined compressive strength, splitting strength and elastic modulus of ER-OCSM decrease gradually, and the flexibility of emulsified asphalt is obvious. The research results lay the foundation for the application of ER-OCSM.
引文
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[2]李明杰.水泥稳定碎石强度影响因素的试验研究[J].公路交通科技,2010,27(4):6-11.
[3]陆鹏.水泥稳定碎石半刚性基层再生应用研究[D].重庆:重庆交通大学,2014.
[4]黄琴龙,古小明,杨壮,等.乳化沥青水泥稳定碎石的强度特性及影响因素[J].华东交通大学学报,2017,34(2):54-59.
[5]贾克聪.乳化沥青对水泥稳定碎石强度特性及力学性能的影响[J].公路工程,2015,40(3):213-217.
[6]杜玉兵.改良逐级填充法设计骨架密实型沥青混合料级配[J].盐城工学院学报(自然科学版),2012,25(1).
[7]王峰,熊永松,冯珀楠,等.骨架密实型水泥稳定碎石集料级配设计方法综述[J].建材技术与应用,2016,(6):1-3.
[8]中华人民共和国交通运输部.JTGE51-2009公路工程无机结合料稳定材料试验规程[S].北京:人民交通出版社,2009.
[9]李远厂.乳化沥青—柔性纤维改性水泥稳定碎石的路用性能研究[D].重庆:重庆交通大学,2015.