高掺量粉煤灰在混凝土路面修补中的应用

Application of High Fly ash Mixture in Cement Concrete Pavement Maintenance

粉煤灰中含有大量的Al2O3、SiO2等活性材料,可按一定的比例,掺入水泥混凝土和水泥砂浆中代替部分水泥使用,改善其性能,使其具有后期强度高、工作性好和耐磨性好的特点,目前已在水利工程、建筑工程等领域得到广泛应用,国内高掺量粉煤灰混凝土路面也有应用。本文介绍近2年来开展"高掺量粉煤灰在混凝土路面修补中的应用"课题的研究成果,对不同粉煤灰掺量的水泥、水泥混凝土和水泥砂浆的性能进行研究,找出合理的掺配比例,应用于工程实践,并对试验段的使用效果进行评估。

There are large quantity of live materials(Al_2O_3and SiO_2etc.)in fly ash,it may be mixed in certain proportion with cement and cement concrete with effects of replacing part of cement and improving its performance characteristics of high late strength,good work ability and high wearing resistance.Now it is extensively applied in marine hydraulic engineering and construction engineering.There are high percentage fly ash cement concrete pavements in China.This text introduces the study results of the 'High Fhy ash Mixture in Cement Concrete Pavement Maintenance',in last 2 years.The performances of the mixtures with different percentage of fly ash are discussed and the reasonable proportion of fly ash applied in engineering practice presented.Assessment is made of the application of the high fly ash mixture in one test road section.