【摘 要】
：
Zinc as a strong retarder of Portland cement was recognized by Lieber already in 1967 and he presented his results during Tokyo Congress.In the mean-time zi
【机 构】
：
Glass and Building Materials Division in Cracow, Institute of Ceramics and Building Materials, 31-98
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Zinc as a strong retarder of Portland cement was recognized by Lieber already in 1967 and he presented his results during Tokyo Congress.In the mean-time zinc content in cement clinker was significantly increased due to the use of alternative fuels and iron corrective waste materials.It was the reason that in Institute of Ceramic and Building Materials several clinkers in rotary kiln in Pilot Plant were produced, with different zinc content.The examination of these clinkers has shown that in the clinker zincate-aluminate calcium phase is formed which caused the acceleration of cement set.It was due to the formation of aluminate ions from zinc phase hydration, which reacting with sulphate ions from cement, were transformed into ettringite.Only higher content of ZnO in clinker than 1.5% caused drastic retardation of cement setting time, because, apart of zincate phase,ZnO remained in clinker, thus influencing according to Liebers or Arliguies hypothesis.
其他文献
说起行,我的故乡顶有特色了.我们的“行”其实就是行船.我的故乡兴化在江苏的中部,在所谓里下河地区.它的西边是著名的大运河.因为海拔低,一旦大运河决堤,我的故乡在一夜之间
肝癌是我国常见的恶性肿瘤之一,手术切除是治疗肝癌的首选治疗方法,但是大多数患者发现时多数为中晚期,无法进行手术切除。高强度聚集超声(HIFU)是一种非侵袭性的治疗方法,在
In this study, three modeling experiments were designed to investigate whether nano-particles incorporated in the cement paste act as nucleation sites for C
Cement manufacture generates environmental problems due, among others, to the greenhouse gases, especially CO2, emitted in the process.A number of materials
那天，我回去得略早，在楼道里就听见儿子的声音：“家长真难教育，当孩子就得有耐心啊！”我捏着钥匙，瞠目结舌。听声音，他在跟同学通电话：“等父皇和母后老了，有了逆反心理就更难引导了。他们会坚信，绿豆治百病，吃茄子可长生不老，五千块钱一只的枕头，能令人返老还童……”我笑到手软，钥匙跌落在地。 门忽然开了，儿子招着手说：“进来吧！”我坐在沙发上，将脸埋在掌心里，又笑。 结束通话后，这位初中男生感慨道：
Applying blended materials with finer particle size or high reactivity could be an effective and economic way for improving the microsturcture of interfacia
去年年初的时候，单位在扶贫驻点村开展了一项“一对一帮扶”活动。我接到了任务，帮扶对象是一个女孩。 女孩的扶贫项目很简单，我只需要帮她准备资料，申请扶助资金就可以了。领导觉得扶贫不单单是物质上的，精神层面的也很重要。于是，我加了女孩的微信。 女孩的朋友圈和她的生活一樣，清汤寡水，每次都是两张图，一句话。图片的拍摄地点大都是在教室或者图书馆，作为主角的女孩，眼睛永远盯着书本，像是书本上藏着她所有的
The degradation of rhodamine B on the surface of self-cleaning mortar with P25 titanium dioxide was investigated.Mortar samples containing 1%, 3%, 5% P25 ti
目的:探讨睾丸间质细胞瘤的临床病理特点及诊疗方法。方法:分析并总结3例睾丸间质细胞瘤患者的临床病理资料并文献复习。结果:1例术中冰冻切片诊断为睾丸间质细胞瘤,2例术前
Although the C3A content in clinker is relatively low, its behavior is crucial because it controls the setting time of cement.The presence of minor elements