Study On The Anti-erosion Properties Of Guizhou Cement Powder Ash Stabilized Macadam Base Of Expressway

With the intensified imbalance between supply and demand of international energyand the higher requirement for environment protection, fly ash which has long beenconsidered as waste becomes the study object of comprehensive utilization. Stabilizedsoil, aggregates, industrial waste semi-rigid base materials with cement, lime and fly ashas the main binders are widely used for the base of various roads because of their highstrength, good water stability and remarkable economic benefit, and the correspondingconstruction technology is being improved continuously.This article closely with "Guizhou highway road of fly ash comprehensiveutilization technology research" the scientific research project, the cement stabilizedgravel base scour resistance of fly ash were studied, the fly ash, cement and gradingwere different under the condition of laboratory test, summed up the influence from thetest results of fly ash cement stabilized macadam base erosion resistance factors, andselect a set of optimal anti-scouring performance mixture ratio, the mixture ratio underthe condition of forming the performance indicators for its various road test specimens,verify whether the indicators of proportion of the mixture can meet the specificationrequirements.Since in recent years, fly ash began to get attention, many scholars at home andabroad in different aspects of the application of fly ash was studied. From the currentsituation, and now the use of fly ash in pavement base is relatively frequent, so therelated research is mainly focused on the mixture proportion design, strength propertiesand shrinkage properties, etc., but about fly ash for cement stabilized gravel baseanti-scouring performance research are very few. As time goes on, after a period of useof asphalt pavement, pavement cracks due to various reasons, which makes road Tabfree water will to through cracks in the internal structure of the road, will absorb themoisture in early primary, but as the base saturation, free water will stay on the borderof the surface layer and base. In under the action of vehicle load, can effect a big voidwater pressure at the base, when away from the action of vehicle load and will form alarge pump suction, forming a wash cycle. With the passage of time, under the action ofvehicle load repeated action, flushing of the damage at the grass-roots level will bemore and more serious, this will lead to surface fine aggregate at the grass-roots levelowing to lack of cohesiveness and constantly falling off, so as to make the road.thephenomenon in a pavement structure. Anti-scouring performance good or bad, therefore,is a key factor affecting the quality of road use, fly ash for cement stabilized gravel baseto study the scour resistance has very important significance.