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

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Materiales de Construccion 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

Materiales de Construccion 工程技术-材料科学：综合

CiteScore

3.20

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2