利用粉煤灰筑路是化害为利的重要措施。据有关资料统计,1970年全世界使用粉煤灰约32 00万吨,而道路工程的使用量为2000万吨,占62%。我国在60年代也已开始在道路工程上试用,取得较好的效果。粉煤灰在道路工程上的应用,主要有以下几个方面: The use of fly ash to build roads is an important measure to harm the benefits. According to relevant statistics, in the 1970s, fly ash was used around the world at about 321 million tons, while the road project was used at 20 million tons, accounting for 62%. In the 1960s, China has also started trials on road projects and achieved good results. The application of fly ash in road engineering mainly includes the following aspects: