工业废渣路面基层材料试验研究.pdf

第37卷,第5期
公路工程
Vol 37. No 5
2012年10月
Highway Engineering
Oct.,2012
工业废渣路面基层材料试验研究
高伏良,黄永强2,李飞2,孙超林,黄大成,马韧
(1.湖南长湘高速公路建设开发有限公司,湖南长沙410200:2.湖南省交通科学研究院,溯南长沙410015)
[摘要]以钢渣、碎石为集料,通过实验室试验研究了水泥、水泥粉煤灰、石灰粉煤灰稳定路面基层材料的无
侧限抗压强度、劈裂强度、抗压回弹模量和抗冲刷性能。结果表明,钢渣作为公路基层集料具有较碎石更为良好的
性能。钢渣作为集料的基层材料强度高于碎石作为集料的基层材料;用水泥稳定钢渣可获得相对高的无侧限抗压
强度,用石灰粉煤灰稳定钢渣获得相对高的劈裂强度。掺加粉煤灰的基层材料在180d皊期间抗压回弹模量保持
增长,水泥稔定基层材料90d以后抗压回弹模量无明显增长。石灰粉煤灰稳定钢渣的回弹模量显著高于其他基
层材料。水泥稳定钢渣抗冲刷性较水泥稳定碎石好,水泥粉煤灰与石灰粉煤灰稳定类用钢渣代替碎石作为集料对
冲刷性能影响不明显。
[关键词]路面基层;工业废渣;粉煤灰;钢渣
[中图分类号]U416.25[文献标识码]A
[文章编号]1674-0610(2012)05-0214-04
An Experimental Study on Pavement Base Materials
with Iindustrial Wastes
GAO Fuliang HUANG Yongqiang,, LI Fei, SUN Chaoling
HUANG Daicheng,MA Ren
(1. Hunan Changxiang Expressway Construction and Development Co. Ltd, Changsha, Hunan 410200
China; 2. Hunan Communications Research Institute, Changsha, Hunan 410015, China)
I Abstract] Portland cement, cement-fly ash, and lime-fly ash stabilized pavement base materials
using steel slag and crushed stone as aggregate was prepared. Experiments on unconfined compressive
strength, splitting strength, compressive resilient modulus, and scour-resistance were conducted. Steel
slag shows superior performance as aggregate than macadam. Materials using steel slag show superior
strength than materials using crushed stone. While cement stabilized steel slag shows the highest uncon-
fined compressive strength, lime-fly ash stabled steel slag shows the highest splitting strength. Resilient
modulus of base materials with cement-fly ash keeps rising in 180d curing age, while resilient modulus of
base materials with cement only exhibits little change. Resilient modulus of lime-fly ash stabilized steel
slag is significantly higher than other materials. Scour-resistance of cement stabled steel slag is better
than that of cement stabled crushed stone. However, influence of aggregate type-on scour-resistance is in
significant for both cement-fly ash and lime-fly ash stabilized base materials
I Key words] pavement base; industrial waste; fly ash; steel slag
粉煤灰和钢渣是我国产量较大的工业废渣,两量随我国钢铁产业的增长快速上升,2008年约为
者的废弃都对大气、水体、土地资源具有明显的危6357万t,利用率仅为20%【い。、,O3、Fe2O3,三者总
害!?。粉煤灰主要的产生途径为燃媟电站,我国
粉煤灰成分主要为SiO2、Al
目前以及今后相当长的一段时期内,煤粉燃烧都将量一般大于75%,在Ca(OH)2碱性溶液环境下可
是燃煤电站的能源主体,2008年燃煤电厂产生粉煤水化硬化。钢渣成分受炼钢及除渣工艺影响,成分
灰3.9亿t,居工业固体废渣之首,综合利用率为范围较大且品质差异性较大,主要含有Ca0及其他
67%1.1。钢渣是炼钢过程中的固体废弃物,其产金属氧化物。由于炼钢出渣温度为1400~1700
[收稿日期」2012-08-06
[作者简介]高伏良(1966-),男、湖南长沙人,高级工程师,主要从事高速公路建设与管理工作。