Dynamic properties of CO2-cured foam concrete at different loading rates: Effect of the foam admixtures and addition of polypropylene fiber

IF 2.6 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Frontiers in Materials Pub Date : 2024-09-02 DOI:10.3389/fmats.2024.1445848

Yunlin Liu, Shangwei Huo, Jiali Fu, Tingbo Shi, Dong Guo

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Abstract

This paper investigated the dynamic mechanical properties of CO2-cured foam concrete under varying conditions, focusing on the effects of foam admixture and fiber reinforcement. The study tends to enrich the knowledge regarding the performance of CO2-cured foam concrete under different loading rates, especially in relation to density and matrix strength. The foam admixture of the specimens ranges from 26% to 55%, achieving density from 600 kg/m3 to 1,000 kg/m3. The specimens were loaded at strain rates from 80 s-1 to 398 s-1. Experimental results revealed the dynamic elastic modulus, dynamic compressive strength, and Dynamic Increase Factor (DIF) showed a strong correlation with the foam admixture and density. In addition, the incorporation of polypropylene (PP) fibers effectively improved the mechanical behavior of the foam concrete, achieving up to a 17% increase in dynamic compressive strength. This comprehensive analysis highlights the critical role of foam admixture and fiber reinforcement in determining the dynamic properties of CO2-cured foam concrete and provides valuable insights for optimizing the dynamic performance of foam concrete in various construction applications.

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不同加载速率下二氧化碳养护泡沫混凝土的动态特性：泡沫外加剂和聚丙烯纤维添加量的影响

本文研究了二氧化碳养护泡沫混凝土在不同条件下的动态力学性能，重点关注泡沫掺合料和纤维加固的影响。该研究旨在丰富二氧化碳固化泡沫混凝土在不同加载速率下的性能知识，尤其是与密度和基体强度相关的知识。试样的泡沫掺量从 26% 到 55%，密度从 600 kg/m3 到 1,000 kg/m3 不等。试样的加载应变速率为 80 s-1 至 398 s-1。实验结果表明，动态弹性模量、动态抗压强度和动态增大系数（DIF）与泡沫掺合料和密度密切相关。此外，聚丙烯（PP）纤维的掺入有效改善了泡沫混凝土的力学性能，使其动态抗压强度提高了 17%。这项综合分析强调了泡沫掺合料和纤维增强材料在决定二氧化碳养护泡沫混凝土动态性能方面的关键作用，并为优化泡沫混凝土在各种建筑应用中的动态性能提供了宝贵的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Frontiers in Materials Materials Science-Materials Science (miscellaneous)

CiteScore

4.80

自引率

6.20%

发文量

749

审稿时长

12 weeks

期刊介绍： Frontiers in Materials is a high visibility journal publishing rigorously peer-reviewed research across the entire breadth of materials science and engineering. This interdisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers across academia and industry, and the public worldwide. Founded upon a research community driven approach, this Journal provides a balanced and comprehensive offering of Specialty Sections, each of which has a dedicated Editorial Board of leading experts in the respective field.