在20世纪晚期，另一种块材取代了粘土砖，这就是所谓的煤渣砌块，它们大都由混凝土制成。
Another type of block replaced clay bricks in the late 20th century. It was the Cinder block, made mostly with concrete.
通过实验室试验和工业性试制，对用电厂湿排煤渣替代砂配制的混凝土小型空心砌块进行了研究。
Study is made on preparation of small concrete hollow block using cinder wet discharged from power plant instead of sand by laboratory and industrial experiments.
经过预处理的锰渣可以代替煤渣生产空心砌块；
The manganese slags after pre-treated can replace coal cinder in producing hollow block.
经过预处理的锰渣可以代替煤渣生产空心砌块；
The manganese slags after pre-treated can replace coal cinder in producing hollow block.
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