自燃煤矸石经粉碎、筛选作为混凝土集料，在一些产煤地区得到比较广泛的推广应用，取得了明显的社会效益和经济效益。多年来，在开发利用这一工业废渣过程中，有关工程技术人员发现，并不是所有的自燃煤矸石都可以用作混凝土集料。实践说明，有些煤矸石若使用不当，将会对混凝 Self-burning coal gangue has been crushed and screened as a concrete aggregate. It has been widely used in some coal-producing areas and has achieved significant social and economic benefits. Over the years, during the development and utilization of this industrial waste residue, the relevant engineering and technical personnel found that not all self-burning coal gangue can be used as concrete aggregate. Practice shows that if some coal gangue is used improperly, it will cause coagulation