改性压实水泥抗压强度影响因素的研究

采用ＤＳＰ原理和压实技术相结合，掺加硅灰和ＣａＣＯ３等细颗粒矿物外加剂改变压实水泥材料基质。研究了成型压力、细粉掺量、养护制度等因素对压实水泥强度的影响。结果表明，掺加适量硅灰和提高成型压力可显著提高压实水泥的抗压强度，掺加ＣａＣＯ３对强度无明显影响；压实水泥存在最佳养护龄期，超过此龄期强度倒缩。     

炼石水泥厂2300t/d熟料生产线的达产达标

福建水泥股份有限公司炼石水泥厂2300t／d生产线(即#4窑)由南京水泥工业设计研究院开发设计，2000年11月动工，建设周期为10个月，2001年9月即实现3d达标考核该线大量采用国产化设备，烧成系统、窑头喷煤管、煤磨系统等应用南京院专有专利技术2002年共生产熟料71．54万t，28d强度平均达57.3MPa，全年运转率达83．6％，全面实现了达产达标。     

氧化锌对高胶凝性水泥熟料矿物形成及强度的影响

采用工业原料配料，对以硅酸三钙（C3S，C=CaO，S=SiO2）、硫铝酸钙（C4A3 S^-，C=CaO，A=Al2O3，S^-=SO4^2-）为主导矿物的含C4A3 S^-矿物硅酸盐水泥熟料的矿物形成及其强度进行了研究。借助X射线衍射和热重一差热分析研究了矿物形成过程；探讨了微量元素ZnO对熟料性能的影响及在熟料体系中的固溶情况。研究结果表明：生料中掺入ZnO可使C4A3 S^-和CaS等矿物通过低温反应形成，共存于同一熟料体系中，并可提高熟料的强度；过高的ZnO含量亦会降低C4A3 S^-矿物的分解温度。     

Preparation of nanosize Pt clusters using ion exchange of Pt(NH3) 4 2+ inside mesoporous channel of MCM-41

Mesoporous molecular sieve MCM-41 with a Si/Al ratio of 35 was obtained by hydrothermal synthesis using a gel mixture with a molar composition of 6 SiO₂0.1 Al₂O₃1 hexadecyltrimethylammonium chloride 0.25 dodecyltrimethylammonium bromide 0.25 tetrapropylammonium bromide0.15 (NH₄)₂O1.5 Na₂O300 H₂O. The MCM-41 sample was calcined in O₂ flow at 813 K and subsequently ion exchanged with Ca²⁺. A small Pt cluster has been supported on the MCM-41 sample following a procedure using ion exchange of Pt(NH₃) ₄ ²⁺ . The Pt(NH₃) ₄ ²⁺ ion supported on MCM-41 has been activated in O₂ flow at 593 K and subsequently reduced with Fh flow at 573 K, in the same way used for the preparation of a Pt cluster entrapped inside the supercage of zeolite NaY. The resulting Pt cluster supported on the MCM-41 shows hydrogen chemisorption oftotal two H atoms per Pt at 296 K (based on the total amount of Pt) and high catalytic activity for hydrogenolysis of ethane. The chemical shift in¹²⁹Xe NMR spectroscopy of adsorbed xenon indicates that the Pt cluster is located inside the mesoporous molecular sieve.     

焙烧法水热合成5A沸石分子筛

焙烧活化化工原料氢氧化钙、氢氧化钠、硅酸钠和二氧化硅，探索焙烧法水热合成5A沸石分子筛的条件。并通过X射线粉末衍射(XPS)和扫描电镜(SEM)对产品进行表征。焙烧原料合成5A沸石分子筛的优化条件为焙烧温度550 ℃, 焙烧时间4 h, 晶化时间4 h。     

混合材对水泥与减水剂适应性的影响研究

通过对掺高效减水剂水泥净浆流动性及流动性损失的测定试验，研究了3种混合材(粉煤灰、水淬高炉矿渣和沸石)在不同替代率情况下对减水剂作用效果的影响。结果表明：水淬高炉矿渣有利于改善减水剂与水泥的适应性，而掺粉煤灰和沸石(尤其是沸石)则会导致减水剂塑化作用的降低，而且浆体流动性损失也有增大趋势。     

Effect of MgO on the composition and properties of alite-sulphoaluminate cement

The effect of MgO on the composition and properties of alite-sulphoaluminate cement clinker with commercial-grade raw materials such as limestone, clay, gypsum and fly ash as starting materials has been investigated in order to confirm results previously obtained with pure raw materials. The experiment results confirm that the addition of MgO at about 2-5% can improve the burnability of raw meal, promote the absorption of free lime and the formation of C₃S and C₄A₃S¯. In addition, it is shown that this can also increase the strength development of the cement and shorten the setting time. When the content of MgO reaches about 8%, the strength of the cement decreases slightly and the setting time is extended.     

机械激活矿渣水泥

用于式高能振动磨机械激活矿渣（炉渣和／或硅灰）水泥。研究表明：经机械激活后．矿渣水泥的颗粒粒度降低，颗粒的比表面积增大。在掺合了矿渣的水泥中硅微粒聚团经机械激活后可有效地分散并作用于水泥中．使矿渣水泥的水化反应括性增强，促进水泥水化反应，降低水泥制品的孔隙度．从而可以提高水泥制品的力学性能。通过Fourier变换红外光谱和核磁共振等方法分析了机械激活作用的机理。     

改善普通水泥耐久性的研究

研究了活性组分及少量的引气剂对水泥性能的影响。实验表明：活性组分或与少量的引气剂复合使用，降低了水泥砂浆的大孔体积和干缩率，提高了其抗渗性、抗化学侵蚀性、抗钢筋锈蚀性，并改善了水泥砂浆的某些力学性能。