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The adsorbability of Portland cement that was prepared by the clinker with different modulus and mineral composition for sulphamate superplasticizer was studied.

研究了不同率值、不同矿物组成的熟料制成的硅酸盐水泥对氨基磺酸盐高效减水剂的吸附性能。

The adsorbability of Portland cement that was prepared by the clinker with diffierent modulus and mineral composition for sulphamate superplasticizer was studied.

研究了不同率值、不同矿物组成的熟料制成的硅酸盐水泥对氨基磺酸盐高效减水剂的吸附性能。

The transformation of physical and chemistry performance in the thaumasite form of sulfate attack process on cement mortars.

武汉理工大学,硅酸盐材料工程教育部重点实验室中国混凝土与水泥制品网

Plots of molar volume verses temperature are linear for all samples in the stable liquid region, but there is an increase in the slope〓 with decreasing temperature in the supercooled liquid region, analogous to that observed for C〓 in similar alkali titanosilicate liquids.

将摩尔体积对温度作图,在稳定的液体区内两者为线性关系,随着温度的降低到达过冷液相区,摩尔体积对温度的斜率升高,类似于在相近的碱硅酸盐熔体中观察到的热容的异常现象(Richet and Bottinga,1985;Lange and Navrotsky,1993;Tangeman and Lange,1998)。

Thesample has been characterized by XRD, IR, UV-Vis, TG-DTA, ICP, CHN, N2adsorption measurements. Its catalysis was studied via a model reaction. A new titanosilicate JLU-3 was obtained under autogenous pressure at 513K for3 days. The molar ratio of initial mixture was 486.0NaOH:3.0TiO2:1.0SiO2:2.2TEA:83.0H2O.

详细考察了 JLU-3 钛硅酸盐分子筛的合成中OH-/SiO2,TiO2/SiO2,H2O/SiO2,模板剂,晶化温度和时间等影响因素,并利用 XRD,IR,UV-Vis,TG-DTA, ICP, CHN, N2吸附测试等方法对其进行了表征和性能研究,利用模型反应研究其催化性能。

The results show that at 1500℃ a clinker was obtained in which the content of tricalcium silicate is 74.52%.

C_3S是传统硅酸盐水泥熟料中含量最多的矿物,一般占熟料质量的50%~60%,是水泥强度的主要来源。

The burnability of the high tricalcium silicate Portland cement raw meal produced by lead-zinc tailing and shale and property of the resulting clinker were studied in this work.

研究了采用铅锌尾矿和页岩配制的高C_3S硅酸盐水泥生料的易烧性及所得熟料的性能。

The secondary pores of the sandstones were formed by the dissolution of the aluminosilicate, tuffaceous interstitial material and carbonate minerals effect by the carbonic acid and organic acid produced in late diagenesis stage. Hydrocarbon emplacement and tectonic thermal event act a positive role in the preservation of the primary pore and the formation of the secondary pores.

砂岩次生孔隙主要是成岩晚期阶段的碳酸以及有机酸对长石等硅酸盐矿物、凝灰质填隙物以及碳酸盐矿物的溶蚀造成的,油气侵位及构造热事件对原生孔隙的保存及次生孔隙的形成起到了积极作用。

It has also been found that acidic medium is necessary for the formation of protonated monomer and dimer. The stability of the dimer of the tungstophosphate is lower; a pure monomer can be obtained by treating the mixture with a base (Bu4NOR). However, the dimer of tungstosilicate is stable under the same condition.

实验结果还表明,酸性介质是生成质子化单体和二聚体的必要条件,且钨磷酸盐二聚体的稳定性较低,用碱(Bu4NOH)处理合成产物可得纯的钨磷酸盐单体,而相同条件下钨硅酸盐的二聚体却比较稳定。

Pit corrosion is a main kind of localized corrosion. The process of forming pit corrosion includes three stages-formation of pit source, development of pit cave and forming occluded corrosion cell. Molybdate series inhibitors can be inhibitive, for it can control three stages of pit development. First, there is apparent synergistic effect between molybdate and phosphate, which can suppress formation of pit source. Second, there is apparent passivation of molybdate inhibitor according to electrochemistry analysis, which let oxidation film in unoccluded cave repassivate.

首先,钼酸盐与磷酸盐或硅酸盐复配的缓蚀剂具有较理想的缓蚀性能,并且有明显的协同作用,从而能抑制部分点蚀核的产生;其次,钼酸盐复配缓蚀剂的使用,从电化学的角度分析,具有明显的钝化性能,且钝化区间较宽、维钝电流密度较小,从而能使未封闭的蚀孔或点蚀核附近的氧化膜再钝化,得到有效的修复;最后,对于还有部分蚀孔发展成为闭塞腐蚀电池的情况,钼酸盐、磷酸盐能进入蚀孔内部并且在酸性条件下生成铁钼磷酸盐,从而有效地减缓了点蚀的恶化,抑制了腐蚀的发展。

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