Simple test study on anti-freeze additives selection for railway asphalt mixture (RAM) in cold region

被引：5

作者：

Fang, Mingjing ^{[1
]}

Wu, Shaopeng ^{[2
]}

Park, Daewook ^{[3
]}

Chen, Hao ^{[1
]}

Xie, Jun ^{[2
]}

机构：

[1] Wuhan Univ Technol, Sch Transportat, Wuhan 430063, Hubei, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China

[3] Kunsan Natl Univ, Dept Civil Engn, 558 Daehak Ro, Kunsan 54150, Jeonbuk, South Korea

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2017年 / 154卷

基金：

中国国家自然科学基金;

关键词：

Railway; Asphalt mixture; Anti-freeze; Additives; Performance test; MOISTURE SUSCEPTIBILITY; THAW CYCLES; TRACK; DAMS; PERFORMANCE; RESISTANCE; DAMAGE; MODEL; CORE;

D O I：

10.1016/j.conbuildmat.2017.07.212

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The impermeability and moisture damage resistance should be enhanced if railway asphalt mixture (RAM) applied in seasonal frozen area. This paper presents an selection of anti-freeze additives for RAM by conducting highway-based laboratory tests. Five powder alternatives, hydrated lime, fly ash, red clay brick powder, Portland cement and U-type expensive agent (UEA) with different ratio and components, were prepared in terms of concepts with filling, bonding, waterproofing, reinforcing, anti-freezing and self-impermeability. Replacing 50% by weight of mineral filler was proposed in the fabrication of RAM, and the other test conditions were kept in consistence. By experiencing Marshall test, permeability test, indirect tensile test and linear shrinkage test, the results indicated that (i) the bituminous cement made from asphalt binder, mineral filler and different additives can significantly influence the performance of RAM; (ii) A potential combination with hydrated lime (40%), fly ash (20%), red clay brick powder (20%) and Portland cement (20%) can enhance the anti-freeze ability and water damage resistance of RAM; (iii) UEA commonly used in concrete with the concept of self-compaction is not appropriate for being as anti-freeze additive component for RAM. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：284 / 293

页数：10

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