随着我国基础设施建设的大规模进行，混凝土用量巨大。由于高效减水剂的技术迅猛发展，混凝土的水胶比有了较大降低，为混凝土中降低水泥用量和非活性矿物掺合料的使用创造了机会。为解决粉煤灰、矿渣等传统掺合料资源供应不足的问题，为更广泛利用工业固体废弃物，现代混凝土开始越来越多地使用非活性掺合料。非活性矿物掺合料一般指由砂石加工业产生的石粉、冶金工业产生的尾矿和建筑垃圾加工的微粉。需要引起重视的问题是在这个领域生产和工程应用走在了基础理论研究之前。课题的任务是研究由低比例水泥和高比例的传统掺合料与非活性矿物掺合料共同组成的非活性掺合料复合胶凝材料在低水胶比下的强度形成和发展规律、结构特征，评估其硬化结构的稳定性，分析其影响因素；课题的创新之处在于明确石膏对于非活性掺合料复合胶凝材料的影响机理。建立非活性掺合料复合胶凝材料胶砂和混凝土在典型环境中长期稳定性的评价体系和方法。

With the large-scale infrastructure construction in our country built, the consumption of concrete is great. Due to the superplasticizer develop rapidly, the water/cement ratio of concrete is greatly reduced. It privodes the chance for reducing the dosage of cement in the concrete and using inactive mineral admixture . For the lack of fly ash, slag and other admixture traditional resources, modern concrete started using inactive admixture to consume the more industrial solid waste. The inactive mineral admixture generally refers to powder produced by sand and gravel processing industry, metallurgical industry and construction waste processing. We should pay attention to the problem that the walk of engineering application is in advance of the basic theory research in the field production. The task of the project is studying the strength formation and the law of development, structure characteristics of inactive admixture composite cementitious material composited with low proportion of cement,high proportion of traditional admixture and inactive mineral admixture, evaluating the stability of hardening structure, analyzing its influencing factors. The innovation of subject lies in the influence mechanism gypsum for inactive admixture composite cementitious material. The aim is to establish the evaluation system and methods in the long-term stability of the inactive admixture composite cementitious material of mortar and concrete under the typical environment.