摘要
[目的]为研究速强常温沥青混合料在低等级公路养护中作为结构层混合料的应用效果.[方法]通过室内试验和现场施工相结合的方法,从速强常温沥青混合料原材料的制备和优选、配合比设计、性能试验及工程应用等方面进行研究.[结果]研究结果表明,速强常温沥青混合料AC-13的生产配合比1#∶2#∶3#∶细集料∶矿粉=38∶16∶10∶34∶2,油石比为5.7%(复合改性乳化沥青10%),用水量2.4%,固化剂2.0%.混合料的成型强度、高温稳定性、低温抗裂性能及水稳定性能基本达到普通热拌沥青混合料的水平,满足提前开放交通的要求.[结论]提出了速强常温沥青混合料罩面施工工艺流程,工后检测均满足规范要求.速强常温沥青混合料作为一种新型材料在低等级公路养护中具有较好的推广应用前景.
Abstract
[Purposes]This paper aims to study the application effect of normal temperature asphalt mix-ture as structural layer mixture in low-grade highway maintenance.[Methods]Through the combination of indoor test and on-site construction,the preparation and optimization of raw materials,mix design,performance test and engineering application of the normal temperature asphalt mixture were studied.[Findings]The research results show that the production mix ratio of AC-13,a normal temperature as-phalt mixture,is"1#∶2#∶3#∶fine aggregate:mineral powder=38∶16∶10∶34∶2",with an oil stone ratio of 5.7%(composite modified emulsified asphalt 10%),a water consumption of 2.4%,and a curing agent of 2.0%.The molding strength,high temperature stability,low temperature crack resistance,and water stability of the mixture basically reach the level of ordinary hot mix asphalt mixture,meeting the require-ments of early opening of traffic.[Conclusions]The construction process of normal temperature asphalt mixture cover has been proposed,and the post construction inspection meets the standard requirements.As a new type of material,normal temperature asphalt mixture has good prospects for promotion and ap-plication in the maintenance of low grade highways.
维普
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