Research on the durabilities of concretes made from shaft kiln cement and rotary kiln cement; 水泥回转窑内温度测量是关系到水泥质量的关键问题。
The durabilities of some bentonites and Na-and Ca-base bentonites mixture was investigated by means of absorbing methylene blue method and strength method. 本文用吸兰量法和强度法考察了五种膨润土的耐用性和钠基与钙基膨润土混合后的耐用性。