金尾矿用量和 PVA 纤维含量对 ECC 抗冻性的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-12-09 DOI:10.1680/jadcr.23.00115

Zhi Ge, Chuansong Chen, Yufeng Bi, Hongzhi Zhang, Yanhua Guan, Yongwei Yang, Yifeng Ling, Renjuan Sun

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引用次数: 0

摘要

本研究调查了金尾矿对工程水泥基复合材料（ECC）抗冻性的影响。ECC 由三种金尾矿剂量和四种聚乙烯醇（PVA）纤维含量制成。所有混合物的水粘合剂比（W/B）均为 0.28。测试了表面损伤、质量损失、相对动态弹性模量、抗压强度和损伤层厚度，以研究 ECC 的抗冻性。结果表明，金尾矿对 ECC 抗冻性的影响微乎其微。此外，ECC 的抗冻性随着纤维含量的增加而增加。添加了金尾矿的 ECC 与未添加金尾矿的 ECC 一样具有优异的抗冻性，这表明在 ECC 中用金尾矿替代硅砂（达到 100% 的替代率）是可行的。此外，还建立了金尾矿用量和冻融（F-T）周期对 ECC 损坏层厚度的预测模型。

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Effects of gold tailings dosage and PVA fiber content on the frost resistance of ECC

In this study, the effect of gold tailings on the frost resistance of engineered cementitious composites (ECC) was investigated. The ECC were made with three gold tailings dosages and four polyvinyl alcohol (PVA) fiber contents. A water-binder ratio (W/B) of 0.28 was used for all mixtures. Surface damage, mass loss, relative dynamic elastic modulus, compressive strength and damaged layer thickness were tested to investigate the frost resistance of ECC. The results indicate that the effect of gold tailings on the frost resistance of ECC is marginal. Moreover, the frost resistance of ECC increases with the increase of fiber content. The ECC with the addition of gold tailings have the same excellent frost resistance as those without gold tailings, indicating that it is feasible to replace silica sand with gold tailings up to 100% replacement in ECC. In addition, a predictive model of damaged layer thickness of ECC in function of gold tailings dosage and freezing-thawing (F-T) cycle was developed.

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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.