摘要
选用具有一定级配的细集料与水混合作为堵塞剂,借助路面渗水仪进行多空隙沥青混合料(PAM)的多周期排水堵塞试验,测定其渗水系数,研究空隙率(VV)、最大公称粒径(NMAS)、混合料级配、堵塞剂及沥青种类等对PAM排水及抗堵塞性能的影响规律.结果表明:集料最大公称粒径为1.18mm的堵塞剂比集料最大公称粒径为0.60 mm的堵塞剂更易堵塞PAM试件空隙;PAM连通空隙率越大,其排水性能越强,抗堵塞性能也越强;PAM的最大公称粒径变化对其排水能力没有明显影响,但最大公称粒径较大的PAM试件的抗堵塞性能更好;与细型级配PAM相比,粗型级配PAM的排水及抗堵塞性能更强;不同沥青种类对PAM排水及抗堵塞性能影响不大.
The grading fine aggregate mixed with water was chosen as clogging agent. Water permeability coefficients were measured by using pavement surface permeameter simulation multi-cycle drainage clog- ging experiment of porous asphalts mixture（PAM）. The influence of volume of air void（VV）, normal maximum aggregate size（NMAS）, gradation, clogging agent, asphalt type on the PAM＇s drain ability and anti-clogging ability was researched. The experimental results indicate that the clogging agent with NMAS of 1.18 mm is better than that of 0.6 mm to clog the PAM; VV has an obvious influence on PAM＇s drain ability and anti-clogging ability. NMAS of the aggregate has an obvious influence on PAM＇s anti-clogging ability, with no obvious influence on the drain ability. PAM with the coarser gradation has better perform- ance on drain ability and anti-clogging ability. Asphalt type has little influence on PAM＇s drain ability and anti-clogging ability.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2016年第2期413-416,共4页
Journal of Building Materials
基金
江苏省高校优秀中青年教师和校长境外研修计划
住房和城乡建设部科技研究计划项目(2011-K5-17)
江苏高校优势学科建设工程资助项目
关键词
道路工程
多空隙沥青混合料
空隙率
集料最大粒径
渗水系数
堵塞剂
road engineering
porous asphalt mixture（PAM）
volume of air void
maximum size of the aggregate
water permeability coefficient
clogging agent
