Research on Rapid Curing Technology of Lime-flyash-cement Stabilized Macadam

摘要

In order to solve the problem of long curing time and long construction time ofrnprojects, the early strength of lime and fly-ash stabilized macadam can be increased byrnapplying the proper amount of cement. First, compressive strength, cleavage strength andrncompression rebound modulus of lime-fly ash-cement stabilized macadam are testedrnsystematically applying standard curing (T: 20±2℃, RH: ≥95%) and high-temperaturerncuring (T: 60±2℃ , RH:≥95). Secondly, a relationship curve between strength and curingrnage is found by applying four different regression models. Thirdly, strength gainrnrelationship between high temperature curing and standard curing is achieved. So, thern180-day strength by standard curing can be determined from the strength cured by highrntemperature curing. Fourthly, the microstructure of samples is observed and analyzedrnsystematically by applying electron microscope scanning. By the way of high temperaturerncuring, not only can the microstructure of it be improved, but also the curing time can bernshortened. Therefore, design parameters and major control index of ratio design for thernlime-fly ash-cement stabilized macadam base course construction can be confirmedrnrapidly.