Effect of mix design on the size-independent fracture energy of normal- and high-strength self-compacting concrete

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2018-02-13 DOI:10.3989/MC.2018.00717

H. Cifuentes, J. Ríos, E. J. Gómez

引用次数: 11

Abstract

Self-compacting concrete has a characteristic microstructure inherent to its specific composition. The higher content of fine particles in self-compacting concrete relative to the equivalent vibrated concrete produces a different fracture behavior that affects the main fracture parameters. In this work, a comprehensive experimental investigation of the fracture behavior of self-compacting concrete has been carried out. Twelve different self-compacting concrete mixes with compressive strength ranging from 39 to 124 MPa (wider range than in other studies) have been subjected to three-point bending tests in order to determine the specific fracture energy. The influence of the mix design and its composition (coarse aggregate fraction, the water to binder ratio and the paste to solids ratio) on its fracture behavior has been analyzed. Moreover, further evidence of the objectivity of the size-independent fracture energy results, obtained by the two most commonly used methods, has been provided on the self-compacting concrete mixes.

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配合比设计对普通和高强自密实混凝土尺寸无关断裂能的影响

自密实混凝土具有特定成分固有的特征微观结构。与同等振捣混凝土相比，自密实混凝土中细颗粒含量较高，会产生不同的断裂行为，影响主要断裂参数。在这项工作中，对自密实混凝土的断裂行为进行了全面的实验研究。12种不同的自密实混凝土混合物的抗压强度范围为39至124MPa（比其他研究中的范围更宽），已进行了三点弯曲试验，以确定比断裂能。分析了配合比设计及其组成（粗集料级配、水胶比和浆固比）对其断裂性能的影响。此外，通过两种最常用的方法获得的与尺寸无关的断裂能结果在自密实混凝土混合料上的客观性也得到了进一步的证明。

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.