温度对1100℃合成的硫铝酸钙粘结剂初始性能的影响

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS

Advances in Applied Ceramics Pub Date : 2021-05-19 DOI:10.1080/17436753.2021.1945849

M. Gallardo-Heredia, R. X. Magallanes-Rivera, J. Robles, Yadira G. Maldonado, E. Martínez-Sánchez

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引用次数: 1

摘要

本文研究了在1100℃较低温度下，以工业废渣为原料合成硫铝酸钙水泥，固化温度对水泥体力学性能的影响。以氟石膏、粉煤灰、铝渣和碳酸钙为原料。合成的主要物相为硫铝酸钙和辉长石。膏体的水灰比为15-25 wt-%，在20和40°C下固化。研究发现，随着硫酸盐总量的增加和温度的升高，混凝土的抗压强度在养护初期增强，凝结时间减少。随着时间的推移，发现钙矾石是形成致密结构的主要反应产物。硫酸钙的水化作用改变了钙矾石的形成，引起强度发展的波动，但在某些情况下，28天强度超过40 MPa。通过SEM和XRD对其微观结构和水化产物进行了研究。

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Effect of temperature on the initial properties of calcium sulfoaluminate binders synthesised at 1100°C

ABSTRACT In this investigation, it was studied the effect of curing temperature on the mechanical properties of pastes made with calcium sulfoaluminate cements synthesised from industrial wastes at a relatively low temperature of 1100°C. Fluorgypsum, fly ash, aluminium slag and calcium carbonate were used as raw materials. The main phases of synthesis were calcium sulfoaluminate and gehlenite. Pastes were prepared with different water/cement ratios, 15–25 wt-% hemihydrate and cured at 20 and 40°C. It was found that with higher total amounts of sulphates and increase in temperature, compressive strength is enhanced in the first days of curing and setting times decreased. Ettringite was found to be the main reaction product forming dense structures over time. Calcium sulphates hydration changed the ettringite formation causing fluctuations in the strength development, nevertheless, in some cases the strength surpassed 40 MPa at 28 days. Microstructures and hydration products were studied by SEM and XRD.

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来源期刊

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.