Performance of Self Compacting Concrete Using Bentonite

IF 1 4区工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY

Tehnicki Vjesnik-Technical Gazette Pub Date : 2023-10-15 DOI:10.17559/tv-20221007094749

Muhammad Saad, A. Elahi

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引用次数: 0

Abstract

: Supplementary Cementitious Materials (SCMs) have the potential to enhance the properties of self-compacting concrete (SCC) while reducing the pressure on natural reserves and CO 2 emissions. However, certain SCMs are not able to meet the needs in the construction industry. This research investigates the role of unheated bentonite (BN) clay and its synergistic effect with Ground Granulated Blast Furnace Slag (GGBS) as a partial substitute for cement on performance of SCC. Three different mixtures were prepared, each consisting of 0%, 15%, and 30% (by weight) BC as a replacement for cement, while GGBS remained constant to get the designed strength. Each mix was designed with two strength grades of 30 and 60 MPa by adjusting the compositional parameters and validating their 28 days compressive strength. Fresh Properties tests were conducted as per EFNARC standards. The ultrasonic pulse velocity of all tested specimens is greater than 4.5 km/s, indicating "good" and "excellent" quality concrete. The experimental results revealed that combining BC with GGBS concrete improved durability. The BC and GGBS made concrete more resistant to sulphate attack and chloride ingress. The concrete mixtures were found to be suitable and more durable for use in the construction industry.

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膨润土自密实混凝土的性能研究

补充胶凝材料(SCMs)具有增强自密实混凝土(SCC)性能的潜力，同时减少对自然保护区的压力和二氧化碳排放。然而，某些标准管理系统无法满足建造业的需要。研究了未加热的膨润土(BN)粘土与矿渣粉(GGBS)作为水泥的部分替代品对SCC性能的影响及其协同效应。配制了三种不同的混合物，分别由0%、15%和30%(重量)的BC代替水泥，而GGBS保持不变，以获得设计强度。通过调整组合参数，设计了30和60 MPa两个强度等级的混合料，并验证了其28天抗压强度。新鲜性能测试按照EFNARC标准进行。所有试件的超声脉冲速度均大于4.5 km/s，表明混凝土质量为“好”和“优”。试验结果表明，BC与GGBS混凝土配合能提高混凝土耐久性。BC和GGBS使混凝土更耐硫酸盐侵蚀和氯化物侵入。人们发现这种混凝土混合物适用于建筑业，而且更耐用。

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

Tehnicki Vjesnik-Technical Gazette ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.90

自引率

11.10%

发文量

270

审稿时长

12.6 months

期刊介绍： The journal TEHNIČKI VJESNIK - TECHNICAL GAZETTE publishes scientific and professional papers in the area of technical sciences (mostly from mechanical, electrical and civil engineering, and also from their boundary areas). All articles have undergone peer review and upon acceptance are permanently free of all restrictions on access, for everyone to read and download. For all articles authors will be asked to pay a publication fee prior to the article appearing in the journal. However, this fee only to be paid after the article has been positively reviewed and accepted for publishing. All details can be seen at http://www.tehnicki-vjesnik.com/web/public/page First year of publication: 1994 Frequency (annually): 6