摘 要：介绍了一种干法环保人工砂生产技术，该技术采用精品骨料生产加工系统，将低质量的石子加工为优质商品混凝土制备用原材料，不仅实现了原材料的可持续发展，而且经济环保。 Abstract: A kind of dry environmental protection artificial sand technology is introduced. The fine aggregate production and processing system is the key of the technology. And using the system, low quality stones are made into high quality raw materials of ready-mixed concrete, which not only can realize the sustainable development of the raw materials, but also is economic and environmental protective.

摘 要：通过描述煤矸石物化性质以及在墙体材料、水泥净浆、水泥砂浆、水泥混凝土以及筑路和填充材料中的应用，说明了煤矸石的一些性质可以改善建筑材料的多种性能，并对在应用过程中需要注意的煤矸石种类、粒径、用量、级配等问题进行了描述。 Abstract: Through describing the coal gangue physical and chemical properties as well as its application in wall materials, cement paste, cement mortar, cement concrete and filling materials with good effects, it’s proved that some properties of the coal gangue could improve a number of performances of the building materials. Besides, in order to promote the development of the coal gangue, some attention problems such as the type, particle size, dosage, gradation of the coal gangue are described during the application process.

摘 要：根据纤维水泥板和硅酸钙板生产线排放废水特点，对纤维水泥板和硅酸钙板生产企业废水排放的综合处理方案进行了探讨，提出了废水处理的方案，该方案可合理利用废水，达到国家排放标准。 Abstract: According to the wastewater emission characteristics of the fiber cement plates and silicate calcium plates production lines, the complex measure schemes of the wastewater emission in the fiber cement plates and silicate calcium plates factories are discussed. The measure schemes of the wastewater emission is proposed, which can reasonably use the wastewater, and make it achieve the national emission standard.

摘 要: 结合某高层商办楼基础底板混凝土的施工，针对水化热过高易导致混凝土开裂的问题，从原材料配合比、保温层验算、全过程温度控制、施工措施等方面阐述了厚大混凝土基础底板的施工技术。利用混凝土浇筑后的现场温度测量结果，对大体积混凝土实施了动态保温养护。 Abstract: Combined with construction of a high-rise office building concrete foundation slab, in order to avoid the high hydration heat leading to concrete cracking, from the aspects such as raw material mix ratio, heat preservation layer calculation, temperature control and construction measures, the construction technology of mass concrete thick foundation slab is discussed. By the spot temperature measurement results, the dynamic temperature maintenance for mass concrete slab is carrying out.

摘 要：结合甘肃地区首次应用高强钢纤维泵送混凝土的实际工程，介绍了用粉煤灰、矿粉双掺配制C60钢纤维泵送混凝土的技术关键，并通过优化配合比，解决了该混凝土粘度与可泵性的矛盾。 Abstract: Comparing with the practical engineering of high strength pumping steel fiber reinforced concrete applied in Gansu area at first time, the technical key points of preparing C60 pumping steel fiber reinforced concrete with fly ash and slag powder are introduced. Through optimizing the mix proportion, the contradiction between the viscosity and pumping ability of concrete is solved.

摘 要：通过实际工程案例，观察了混凝土结构易出现渗漏现象的部位，分析了这些部位发生渗漏的原因，提出了渗漏部位的处理方法，并指出了施工中应注意的问题。 Abstract: According to the practical engineering cases, the parts of concrete structures which happen the leakage easily are observed. The reasons for the leakage are analyzed. The treatment method for the leakage parts is proposed, and the attention problems during the construction are put forward.