Revisiting Tennis-Jennings method to quantify low-density/high-density calcium silicate hydrates in Portland cement pastes

Revisiting Tennis-Jennings method to quantify low-density/high-density calcium silicate hydrates in Portland cement pastes
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重新审视 Tennis-Jennings 方法来量化波特兰水泥浆体中低密度/高密度硅酸钙水合物

DOI:
10.1016/j.cemconres.2022.106786
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发表时间:
2022
影响因子:
11.4
通讯作者:
Maruyama Ippei
Maruyama Ippei
中科院分区:
工程技术1区
文献类型:
--
作者:
Kurihara Ryo;Maruyama Ippei

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重新采用Tennis-Jennings定量方法表征低密度(LD)和高密度(HD)硅酸钙水合物(C-S-H)。采用水灰比(W/C)分别为0.40和0.55,采用普通硅酸盐水泥和不同类型水泥的不同Blaine值制备参数化硅酸盐水泥浆体。利用氮吸附测量和x射线衍射(Rietveld)分析来检测这些样品的水化过程。LD和HD C-S-H的密度分别为1.19和1.79 (g/cm3)。水化过程中LD C- s - h与总C- s - h质量比的变化取决于同一硅酸盐水泥内原水泥粉的细度和水泥类型,特别是水化后期W/C比较高时。对于W/C比较低的水泥浆体,水泥类型对后期水化过程中LD C- s - h的析出没有显著影响。
The Tennis-Jennings quantification method was revisited for characterizing low-density (LD) and high-density (HD) calcium silicate hydrates (C-S-H). Parameterized Portland cement pastes were prepared with different Blaine values of ordinary Portland cement and different types of cement using two water-to-cement (W/C) ratios (0.40 and 0.55). The hydration processes in these samples were examined using nitrogen sorption measurements and X-ray diffraction (Rietveld) analyses. The densities of LD and HD C-S-H were determined to be 1.19 and 1.79 (g/cm3of dried C-S-H), respectively. Variation of the mass ratio of the LD C-S-H to the total C-S-H with hydration depended on the fineness of the original cement powder within the same Portland cement and the type of cement, especially at the later hydration for higher W/C ratios. For cement pastes with lower W/C ratios, the type of cement did not have a significant effect on the LD C-S-H precipitation at later hydration.
老化对硅酸盐水泥浆体表面积的一些影响
DOI: --
发表时间: 1960
期刊: Journal of Research of the National Bureau of Standards Section A Physics and Chemistry
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