环境协调性高性能混凝土的研制

本文在阐述水泥混凝土发展过程中所产生的主要生态环境问题,分析对地球生态环境的影响的基础上,讨论了环境协调性高性能混凝土的内涵,开发使用这种材料在保护环境、节约资源和能源等方面的社会意义,以及对其原材料的要求和发展这一材料尚需进行的工作.     

水泥混凝土构造物外观色差的改善

针对水泥混凝土构造物外观色泽的影响因素进行分析，提出对水泥混凝土的配合比、生产方式、质量控制等一些参考意见和看法。     

Bearing Behaviors of Stiffened Deep Cement Mixed Pile

A series of investigations were conducted to study the bearing capacity and load transfer mechanism of stiffened deep cement mixed (SDCM) pile. Laboratory tests including six specimens were conducted to investigate the frictional resistance between the concrete core and the cement soil. Two model piles and twenty-four full-scale piles were tested to examine the bearing behavior of single pile. Laboratory and model tests results indicate that the cohesive strength is large enough to ensure the interaction between core pile and the outer cement-soil. The full-scale test results show that the SDCM piles exhibit similar bearing behavior to bored and cast-in-place concrete piles. In general, with the rational composite structure the SDCM piles can transmit the applied load effectively, and due to the addition of the stiffer core, the SDCM piles possess high bearing capacity. Based on the findings of these experimental investigations and theoretical analysis, a practical design method is developed to predict the vertical bearing capacity of SDCM pile.     

中国水泥行业可持续发展分析

文章收集了近30年中国水泥产业的数据,以科学发展观为指导,运用主成分分析法,基于中国水泥工业的发展现状对中国水泥行业可持续发展进行了实证研究,指出了中国水泥行业可持续发展的途径。     

某高速公路水泥搅拌桩施工质量控制及检验

高速公路软基处理采用水泥搅拌桩属于隐蔽工程,如施工质量不好,一旦被路堤及构筑物覆盖,便构成隐患且难以检查和补救。某高速公路S01合同段软基处理采用水泥搅拌桩,该施工方法的两个关键节点是:事前优化配合比设计,事中严格按试桩工艺进行施工并加强质量控制,最后采取合适的方法进行桩体质量检测评定。施工实例证明:控制关键节点是取得水泥搅拌桩良好施工质量的重要保证。     

熟料分析中铁、铝快速测定方法的探讨

水泥生产中熟料成分分析速度是及时掌握生产情况的指标之一。用单独称样,盐酸（1：1）溶解试样,在pH=2,加热70℃条件下以EDTA滴定测定Fe2O3。在测完铁后的溶液中加入EDTA标准滴定溶液,在pH=4．3,90℃条件下以硫酸铜标准溶液滴定。     

碎石化技术改造旧混凝土路面关键技术研究

旧混凝土路面加铺沥青混凝土路面是旧混凝土修复改造的一种重要方法,而沥青加铺层设计的技术关键则是如何控制和防止反射裂缝的发生.碎石化技术是指采用专有的破碎设备对原旧混凝土路面进行比较彻底地破碎,缩减混凝土板块的有效尺寸,从而降低混凝土板的缝隙在荷载和温、湿度变化下的位移,因此可以有效地防止反射裂缝的发生.本文简要介绍了碎石化技术的原理和工艺,重点介绍了碎石化技术的适用条件、技术关键和沥青罩面层的设计方法,为该法在我国的推广应用提供一定的技术参考.     

Comparison of distribution characteristics of asbestos cement slates in rural and urban regions of Korea

The toxicity of asbestos has been constantly an active research topic. Although asbestos has lots of advantages owing to its stable physicochemical properties and economic characteristics, nations enforce policies prohibiting or limiting its use because of its critical impact on human health. Especially in Korea 96% of imported asbestos are slate construction materials and with the influence of Saemaul movement, thatched roofs have been drastically replaced with slate roofs. Efforts to know the distribution characteristics of extensively used asbestos cement slates and to find out the removal method that suits the distribution characteristics are still in an insufficient state. The purpose of this work was to probe into the distribution of asbestos cement slate buildings in Korea and provide basic data of distribution characteristics for policy making in which consideration of the differences between rural and urban regions is necessary based on findings of the studies so far. It is considered helpful in many ways to solving asbestos cement slate related problems in countries where asbestos usage is increasing even after the 2000s including China.     

新型干法水泥生产仿真技术在水泥工程实践教学中的应用

新型干法水泥生产仿真教学具有实用性好、灵活性大、综合性强、实践成本低的优点。将新型干法水泥生产仿真技术引入水泥工程的实践教学中,可丰富教学内容,灵活多样的教学方式能充分调动学生学习的主动性和积极性,培养学生对水泥工程的全局观和创新意识,弥补传统实践教学的不足。     

玄武岩/玻璃混杂纤维水泥砂浆的力学性能研究

以玄武岩/玻璃混杂纤维制备纤维水泥砂浆,分析了混杂纤维的掺量对水泥砂浆强度的影响。试验结果表明:玻璃纤维的最佳掺量为0.5%,玄武岩纤维的最佳掺量为1.5%。在此掺量下水泥砂浆3d,7d和28d的抗折强度分别为4.51MPa,6.17MPa和7.47MPa;抗压强度分别为16.66MPa,30.78MPa和62.55MPa,显著优于空白样水泥砂浆性能。但其价格远远低于相同量的玄武岩纤维,因而两者可以一并作为添加物用于增强水泥砂浆。