碱活化矿渣水泥对硫酸钠的抗性研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-03-10 DOI:10.22068/IJMSE.17.1.23

A. Allahverdi, H. Hashemi, M. Mahinroosta

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引用次数: 3

摘要

本文研究了碱活性矿渣(AAS)砂浆抗硫酸钠侵蚀的性能。考虑了常温下5%硫酸钠溶液浸泡和干湿循环对砂浆试件抗压强度的影响，评价了砂浆的降解程度。并以符合ASTM标准的II型和V型硅酸盐水泥(PC2和PC5)配制的砂浆试件作为参考。利用x射线衍射、扫描电镜和x射线能谱分析等方法对样品进行了表征。暴露于硫酸钠溶液360天后，PC2、PC5和AAS水泥的抗压强度分别降低了71%、52%和45%。结果表明，与PC2和PC5相比，AAS水泥具有更高的抗硫酸盐性能。

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Resistance of Alkali-activated Slag Cement Against Sodium Sulfate

This work evaluates the resistance of alkali-activated slag (AAS) mortar against sodium sulfate attack. The effects of immersion in 5% sodium sulfate solution under room temperature and wetting-drying cycles on the compressive strength of mortar specimens were considered to evaluate the extent of degradation. Mortar specimens prepared from type II and V Portland cements (PC2 and PC5) in accordance with ASTM standard were also used as a reference. To characterize the chemical products of the degradation process due to sodium sulfate attack, the specimens were also studied by X-ray diffractometry, scanning electron microscopy, and the elemental analysis by energy-dispersive X-ray spectroscopy. After 360 days of exposure to the sodium sulfate solution, PC2, PC5 and AAS cements showed 71, 52 and 45% reduction in compressive strength, respectively. According to the obtained results, AAS cement exhibits a higher sulfate resistance compared to PC2 and PC5.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.