T.C.Powcrs模型若干问题的研究

从T.C.Powers水泥石模型出发,提出了描述水泥混凝土材料初始结构的主要参数是初始孔隙率。由此池绎了水泥浆体组成与结构的定量关系,比原模型有更明了的物理意义,研究结果表明,Powers模型在高孔隙率范围内具有适用性,但不适用于低孔隙率硬化水泥浆体,且在低孔隙率条件下不存在28％的固有凝胶孔隙率,水化产物成份和性质是渐变的。     

新型锚固水泥的研制

利用优质铁铝酸盐水泥熟料配制的锚固水泥具有早强、微膨胀、抗裂性能好、耐腐蚀性强等优点。水泥的初凝时间<5min,终凝时间<10min,0.5h的抗压强度超过12MPa,1h抗压强度超过22MPa,中后期强度增长稳定,各项性能满足锚固工艺的要求。     

非木本木质素磺酸镁对水泥净浆和砂浆性能的影响

用红外光谱法等测定了非木本木质素磺酸镁的结构特征参数,研究了其对水泥净浆和砂浆性能的影响,并与木本木质素磺酸钙进行了对比。非木本木质素磺酸镁结构中的甲基、酚羟基、芳香环比木质素磺酸钙少;特性黏度为 0. 61mL/g,仅是木质素磺酸钙的 61%;磺化度为 0 78mmol/g,比木质素磺酸钙低约 40%。木质素磺酸镁溶液的最低表面张力为 49 82mN/m,起泡性能与木质素磺酸钙相近。非木本木质素磺酸镁对水泥净浆和砂浆减水分散作用为木本木质素磺酸钙的 86 6% ~91 1%。但掺质量分数 0 5%的木质素磺酸镁的砂浆, 28d的抗压强度比掺木质素磺酸钙的高 70 5%。     

Chemical Reaction Engineering and Research and development of gas solid systems

A general procedure is proposed for innovative research and development of gas-solid reactor systems, with a brief explanation of the significance of each step in the procedureBased upon the contacting mode between gas and solid phases, as well as the ways of supplying thermal energy to the reacting regions, various types of gas-solid reactor systems are classified by using tables of so called “matrix” form, for thermal cracking and gasification of heavy oils, gasification of coal, gasification of solid waste, calcination of limestone, clinkering of cement and reduction of iron ore.The importance of fundamental concepts is emphasized for successful research and development by presenting several examples; namely, calcination of limestone, thermal cracking of heavy oils and gasification of solid waste materials.In connection with the direction in which fundamental research should be oriented, four primary ways of thinking are proposed, which can be applied to obtain innovative ideas for further research and development in this field.One example of the author's practical experience was selected to show the role of the fundamental research in the course of large scale development. Finally the author outlines the role of chemical reaction engineering to innovate the novel gas-solid reactor systems which may be inevitable for simultaneous solution of the three big E's; namely, Energy, Environment and Economy.     

CGA560增强助磨剂在水泥粉磨中的应用研究

研究了CGA560增强助磨剂在水泥粉磨中对台时产量和水泥质量的影响。试验结果表明:在磨机状况不改变的条件下,CGA560增强助磨剂的加入可提高磨机产量10%-30%;同时可有效减少过粉磨现象,优化水泥颗粒级配,提高了水泥粉磨细度及比表面积;因而使水泥强度等性能得到了明显改善和提高。     

水泥回转窑旋风预热器嵌入式研究

针时水泥回转窑旋风预热器控制策略,采用了嵌入式控制方法.主要介绍此了系统的硬件及系统移植.通过模拟实验的测试,此方法对水泥回转窑旋风预热器的控制起到了很好的效果.     

Modification of High Performances of Polymer Cement Concrete

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The hydration characteristics and expansion machanism of expansive cement at low<Emphasis Type="Italic">W/B</Emphasis> ratio

The hydration characteristics and expansion impetus of three kinds of cement paste under free-and confined-curing conditions were investigated, which were respectively mixed with three different kinds of expansive agent at low W/B ratio. The results show that the hydration products of pure cement paste and paste mixed with expansive agent are same, but the amount of hydration products, un-hydrated C₃S and C₂S are obviously different at the same hydration age. At 3 d age, the amount of CH in pure cement paste is less than that of paste mixed with expansive agent, but it is reverse when at 28 d age. The amount of AFt at 3d and 28d age in pure cement paste is less than those of paste mixed with expansive agent. Regardless of under free- or confined-curing condition, the amount of ettringite produced varies little since 3d age. The joint effect of the tumefaction of gel-ettringite due to water absorption and the expansive pressure on the pore caused by the crystalloid ettringite is the cause of the volume expansion of cement paste, and the former effect is much greater than the latter. LU Lin-nu : Born in 1972 Funded by 973 High-tech Project of China (No. 2001CB610704-2) and the Natural Science Foundation of Hubei Province(No. 2002AB075)     

MODBUS通信协议在现场水泥成分X荧光分析仪中的应用

首先对MODBUS通信协议进行了简单介绍，然后讨论了采用MODBUS通信协议的水泥成分X荧光分析仪是如何实现与水泥生产自动化总控制系统之间的数据传输的，由此达到控制水泥配料系统自动配料的目的。并给出了Visual C^ 下实现通讯的方法。