多空隙沥青混合料排水及抗堵塞性能研究

Drain Ability and Anti clogging Ability of Porous Asphalt Mixture

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60mm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.

Abstract:

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 clogging 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18mm is better than that of 06mm 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 performance on drain ability and anti clogging ability. Asphalt type has little influence on PAMs drain ability and anti clogging ability.