Improving the Self-Compacting Concrete Properties by Incorporating a New Micronized Limestone Filler

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-12-01 DOI:10.2478/jaes-2022-0029

Raoudha Sassi, A. Jelidi, S. Montassar

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Abstract

Abstract Self -compacting concrete composition results from several approaches to satisfy specific criteria. SCCs must be able to fill small, confined formwork without the need for vibration. To ensure the homogeneity and mechanical characteristics of the concrete, they must have good resistance to segregation throughout the setting time. The self-compacting aspect is controlled by a high volume of paste and an important fines content ensured by incorporating mineral additions that are expensive and not always available. The main objective of this paper is to utilize a new type of micronized limestone filler that may be characterized and incorporated into concrete to guarantee self-compacting quality. In the first part, a detailed characterization of the limestone filler was carried out to investigate its effects on the concrete properties. The identification has been physical, chemical, and specific to the concrete’s formulation. The second part is devoted to the experimental tests on different SCCs mixed with various amounts of filler to determine the optimal incorporation percentage. Moreover, a parametric study, involving the content of filler, the granular structure, and the quantity of superplasticizer, allowed an evaluation of the effect of limestone filler incorporation on fresh and hardened concrete characteristics. Through this study, it was demonstrated that with a proportion of limestone filler of about 25% of the quantity of cement used, the quality of the concrete has recognized appreciable improvements.

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掺加新型微粉石灰石填料改善自密实混凝土性能

自密实混凝土的组成是满足特定标准的几种方法的结果。SCCs必须能够在不需要振动的情况下填充小的受限模板。为了保证混凝土的均匀性和力学特性，它们必须在整个凝结时间内具有良好的抗离析性。自密实方面是由大量的膏体和重要的细粒含量控制的，通过加入昂贵且并不总是可用的矿物添加剂来确保。本文的主要目的是利用一种新型的微粉石灰石填料，可以表征和掺入混凝土，以保证自密实质量。在第一部分中，对石灰石填料进行了详细的表征，以研究其对混凝土性能的影响。鉴定是物理的、化学的，具体到混凝土的配方。第二部分是对不同SCCs掺加不同填料量的实验试验，以确定最佳掺入比例。此外，一项参数研究，包括填料的含量、颗粒结构和高效减水剂的数量，可以评估石灰石填料掺入对新混凝土和硬化混凝土特性的影响。通过本研究表明，石灰石填料的比例约为水泥用量的25%，混凝土的质量得到了明显的改善。

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

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.