Research On Cement Stabilized Macadam Mixing Uniformity With Extra PVA Fiber Bundles

With the quality requirements of road construction industry continue to increase,as the current main structure form of highway road base,Semi-rigid base has the characteristics of high strength,high rigidity,anti-scouring ability strong,but semi-rigid base also has a crack problems,which affects its performance.therefore,it can be the compound method using in cement stabilized macadam mixed with PVA fiber bundle to improve the crack resistance of semi-rigid base.PVA fiber bundle is improved semi-rigid base course material anti-cracking performance of the key lies in how to PVA fiber uniformly dispersed in the cement stabilized macadam base course materials,and this depends to the addition of the mixing process of cement stabilized macadam with extra PVA fiber bundles,and mixing device and mixing process plan is slso closely related to this.Focused on the effects of PVA fiber bundles of the cement stabilized macadam mixing research,this paper puts forward the the concept of “coefficient of relative mass fraction”,the establishment of the adding PVA fiber bundles of the cement stabilized macadam mixing uniform evaluation method.On this basis,first of all,According to the performance test results of cement stabilized crushed stone with the addition of PVA fiber bundles,the best dosage,ideal length,optimum water content and cement dosage of PVA fiber were determined,completed with the addition of cement stabilized crushed stone mixture ratio design of PVA fiber bundles;then,the field mixing test plan was established and completed the add cement stabilized gravel field mixing test PVA fiber bundle,analyzed in the mixing process of different feeding sequence,different single mixing amount and different stirring speed by adding PVA fiber cement stabilized gravel mixing uniformity varies with the mixing time;finally,the paper by the test results comprehensive analysis,established the optimum mixing process scheme of adding PVA fiber cement stabilized gravel mixing uniformity,Determined the method for determining the uniform mixture of cement stabilized macadam with addition of PVA fiber bundles,analyzed the dispersion of PVA fiber bundles in cement stabilized crushed stone mixture.Through the analysis of the full text,Realized the macro evaluation of cement stabilized crushed stone mixture uniform with addition of PVA fiber bundles,established the best mixing process,determine the mixing method for uniform mixing determining,analyzed the dispersion of PVA fiber bundles,improved construction quality of the cement stabilized macadam with addition of PVA fiber bundles,provide a reference for follow-up researches of mixing uniformity and production management.