摘 要：基于正交试验，以陶瓷再生粗砂、特细砂、普通水泥和粉煤灰制备再生砂浆，研究了陶瓷再生粗砂取代率、水胶比和粉煤灰取代率对砂浆抗折强度的影响，通过极差和方差分析得出了各因素的影响主次顺序和优选方案，并进行了机理分析。 Abstract: The recycled mortar is prepared from recycled ceramic coarse sand, super-fine sand, ordinary Portland cement and fly ash. Based on the orthogonal experiment, the effects of the recycled aggregate replacement ratio, the water-binder ratio and the fly ash replacement ratio on the flexural strength of the mortar are investigated. The sequences of factors and the optimum design are obtained by means of range analysis and variance analysis, and the mechanism is analyzed.

摘 要：通过试验分析了水胶比、玻璃粉、养护条件对超高性能水泥基材料抗压强度的影响，并采用扫描电镜（SEM）来探究玻璃粉对硬化浆体微观形貌及水化产物影响的微观机理。试验结果表明，超高性能水泥基材料的强度随水胶比的减小而增大；玻璃粉掺入超高性能水泥基材料中，不仅具有填充作用，还能发生火山灰反应，进而改善超高性能水泥基材料的微结构，提高其性能；高温蒸养可显著提高超高性能水泥基材料的强度。 Abstract: The effects of water-binder ratio, glass powder and curing condition on the compressive strength of ultra-high performance cement-based materials are studied by a lot of tests, and its microscopic mechanism of effects of glass powder on the micro-morphology of hardened paste and hydration products is investigated by using scanning electron microscopy (SEM). The testing results show that the strength of ultra-high performance cement-based material increases with the decrease of water-binder ratio. The glass powder has filling effect and pozzolanic effect which can be used as admixtures, and it can improve microstructure and properties of ultra-high performance cement-based materials. And the high temperature steam curing can obviously improve its strength.

摘 要：阐述了混凝土标准养护室温、湿度控制性能的重要性，分析了一般养护室中存在的普遍问题，并以某检测单位用标准养护室的设计和施工为例，介绍了标准养护室的设计和施工要点。 Abstract: The importance of temperature and humidity control of standard curing room is introduced. The common problems of normal curing room are analyzed. Taking the design and construction of standard curing room in one inspection company as an example, the key points of the design and construction of standard curing room are introduced.

摘 要：介绍了纤维水泥板新型高产专用接坯机的结构设计、切割方式以及增加产量的措施和在电气设计方面的改进。 Abstract: The structure form and cutting mode of a new connection billet machine with high yield for fiber cement board, relative measures on increasing yield and electrical design improvement of the machine are introduced.

摘 要：采用继效流动理论分析了洪泽文化中心框架结构在温度变化及混凝土收缩情况下的徐变。通过实验结果及理论结果对比，发现以继效流动理论为基础计算回字形框架结构的应变是一种可行的方法，计算结果与实验结果相近。 Abstract: The creeping of Hongze culture center frame structure under temperature change and concrete shrinkage is analyzed by using the elastic continuation and plastic flow theory. The experimental results and theoretical results show that the elastic continuation and plastic flow theory is feasible to calculate the strain of rectangular-ambulatory-plane frame structure, and the calculation results are similar to the experimental results.

摘 要：设计了一种测量约束状态下混凝土收缩应力的新方法，该方法可以定量计算出混凝土内部产生的收缩应力；对比研究了约束状态下橡胶混凝土板与普通混凝土板早期的内部应力变化。结果表明：虽然橡胶混凝土的自由干燥收缩值比普通混凝土大得多，但无论在室内环境还是室外环境，橡胶混凝土板的收缩应力均低于普通混凝土板，这是由于橡胶混凝土的弹性模量较低，有利于缓解混凝土内部的应力集中。 Abstract: A new method to measure the shrinkage stress of concrete under restrained condition is designed, by which the shrinkage stress developed inside concrete can be calculated quantitatively. The current investigation aims to compare the internal stress evolution of restrained rubber concrete slab and ordinary concrete slab at early ages. The results show that the internal shrinkage stress developed in restrained rubber concrete slab is lower than that in ordinary concrete slab, whether in the indoor environment or outdoor environment, although the free dry shrinkage of the former is higher than that of the latter, which is due to the lower elastic modulus of rubber concrete helping abate the internal stress concentration of concrete.