混杂纤维、碳酸钙晶须和粗砂对水泥基复合材料力学性能的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2018-05-21 DOI:10.3989/MC.2018.01717

M. Cao, L. Li, Mehran Khan

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引用次数: 38

摘要

目前，研究人员正在开发一种新型的混杂纤维增强水泥基复合材料（HyFRCC）。新型HyFRCC通过添加碳酸钙（CaCO3）晶须、聚乙烯醇（PVA）纤维和钢纤维，可以抑制微裂纹，提高梁的抗压和抗弯性能。在这项工作中，显示了多尺度HyFRCC的混合优化程序，包括钢、PVA纤维和CaCO3晶须。为了进一步提高其力学性能，探索了添加粗砂的新型HyFRCC。此外，还研究了梁和板的弯曲性能，以优化新型HyFRCC中的砂级配和纤维组合。通过优化砂级配、纤维和CaCO3晶须的含量，可以提高梁板的抗压强度、抗弯强度、弯曲性能、抗弯韧性、等效抗弯强度和挠度硬化性能。采用1.5%的钢纤维、0.4%的PVA纤维、1%的CaCO3晶须和经优化的粗砂制备的HyFRCC板坯综合性能最佳。

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Effect of hybrid fibers, calcium carbonate whisker and coarse sand on mechanical properties of cement-based composites

Nowadays researchers are developing a new hybrid fiber reinforced cement-based composites (HyFRCC). The new HyFRCC can restrain micro-cracking, improves compressive and flexural performance of beams by addition of calcium carbonate (CaCO 3 ) whisker, polyvinyl alcohol (PVA) fiber and steel fiber. In this work, a mix optimization procedure is shown for multi-scale HyFRCC, with steel, PVA fiber and CaCO 3 whisker. The new HyFRCC is explored with addition of coarse sand to further improve its mechanical properties. Additionally, the flexural performance of beam and slabs has been investigated to optimize sand gradation and fiber combination in new HyFRCC. The compressive strength, flexural strength, flexural behavior, flexural toughness, equivalent flexural strength and deflection-hardening behavior of beams and slabs are improved with optimized content of sand gradation, fibers and CaCO 3 whisker. The HyFRCC slab with 1.5% steel fiber, 0.4% PVA fiber, 1% CaCO 3 whisker and optimized coarse sand showed overall best properties.

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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.