掺入外加剂的混凝土的长期抗压强度特性:沿海环境下的室外暴露测试

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY International Journal of Concrete Structures and Materials Pub Date : 2024-08-19 DOI:10.1186/s40069-024-00687-8
Binna Lee, Jong-Suk Lee, Jae-Suk Ryou
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引用次数: 0

摘要

本研究以国产材料为基础制作了混凝土试件,并在国内沿海环境中进行了长期暴露试验。本研究分析了掺有外加剂的混凝土的长期抗压强度特性。使用的混合材料分为高炉矿渣和粉煤灰。高炉矿渣和粉煤灰分别取代了约 30% 和约 15% 的水泥。测量了 28 天、1 年和 10 年龄期的抗压强度,并与普通混凝土的抗压强度进行了比较。此外,还将本研究获得的长期抗压强度结果与文献中报道的掺有外加剂的混凝土的抗压强度结果进行了比较。与 28 天龄期的强度相比,普通试样 1 年和 10 年龄期的强度分别提高了约 10 兆帕和约 22 兆帕。然而,与 28 天龄期的强度相比,掺有外加剂的混凝土在 1 年和 10 年龄期的抗压强度分别增加了 ~ 5 兆帕和 ~ 26 兆帕。将文献中报道的掺有外加剂的混凝土抗压强度(基于龄期)与本研究中获得的抗压强度进行比较后发现,初始强度差异在 10-25% 之间。然而,10 年龄期的抗压强度与文献报道的抗压强度几乎相似,差异小于 5%。这些研究结果证实,在使用水泥掺合料时,初始强度的发展速度可能因各种因素而异,但长期强度会在一定范围内趋于一致。
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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Long-term Compressive Strength Properties of Concrete Incorporating Admixtures: Outdoor Exposure Testing in a Coastal Environment

In this study, concrete specimens were fabricated based on domestically manufactured materials, and long-term exposure tests were conducted in a domestic coastal environment. This study analyzes the long-term compressive strength characteristics of concrete mixed with admixtures. The mixed materials used were divided into blast furnace slag and fly ash. The blast furnace slag and fly ash were, respectively, produced by replacing ~ 30% and ~ 15% of the cement. The compressive strength was measured at 28 day, 1 year, and 10 years of age and compared with that of ordinary concrete. In addition, the long-term compressive strength results obtained in this study were compared with those of concrete mixed with admixtures reported in the literature. The strengths of the ordinary specimen at 1 year and 10 years of age increased by ~ 10 MPa and ~ 22 MPa compared with those at 28 day of age. However, concrete mixed with admixtures yielded compressive strength increases of ~ 5 MPa and ~ 26 MPa at 1 year and 10 years of age, respectively, compared with those at 28 day of age. A comparison of the compressive strengths of concrete mixed with admixtures reported in the literature (based on age) and those obtained in this study showed that there was an initial strength difference in the range of 10–25%. However, the compressive strength at 10 years of age was almost similar to those reported in the literature with differences of less than 5%. These findings confirmed that when using pozzolanic admixtures, the development rate of the initial strength may vary owing to various factors; however, the long-term strength converges within a certain range.

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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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