Comparison of Concrete Mixtures and Alkaline Activated Material with Regard to Selected Properties for Structural Design

Q4 Physics and Astronomy

Defect and Diffusion Forum Pub Date : 2024-03-25 DOI:10.4028/p-lc2j6q

Jan Jeřábek

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引用次数: 0

Abstract

In the field of construction, with regard to social and design requirements, it is necessary to look for innovative and advanced solutions for the materials of building and structural elements. The topic of this paper is precisely from this area, where material engineering and the field of concrete belong. The aim of the research task is to compare the properties of three different mixtures. The main goal is the analysis and comparison of samples after exposure of test samples to elevated temperatures of up to 900 °C. The mixtures are based on the same ingredients. The first mixture was a reference one, where the binder was Portland cement. In the second mix, cement was replaced, and an alkali-activated binder was used. And in the third mix, which was a modification of the first mix, part of the aggregate was replaced with light artificial aggregate. The experimental part also focused on testing and comparing the workability in the fresh state and subsequently the basic mechanical characteristics, which include strength in compression, split tension, or static modulus of elasticity. In addition, tests of resistance to frost and defrosting chemicals or determination of the tear strength of the surface layer on the test beams were also carried out.

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混凝土混合物与碱性活性材料在结构设计中的选定性能比较

在建筑领域，考虑到社会和设计要求，有必要为建筑材料和结构元素寻找创新和先进的解决方案。本文的主题正是来自这一领域，即材料工程和混凝土领域。研究任务的目的是比较三种不同混合物的特性。主要目标是分析和比较将测试样品暴露在高达 900 °C 的高温下后的样品。这些混合物基于相同的成分。第一种混合物是参考混合物，粘合剂是硅酸盐水泥。在第二种混合物中，水泥被取代，并使用了碱激活粘结剂。第三种混合物是对第一种混合物的改良，用轻质人工骨料代替了部分骨料。实验部分还重点测试和比较了新鲜状态下的可操作性以及随后的基本机械特性，包括压缩强度、劈裂拉伸强度或静态弹性模量。此外，还进行了抗霜冻和抗解冻化学品试验，或测定试验梁表层的撕裂强度。

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

Defect and Diffusion Forum Physics and Astronomy-Radiation

CiteScore

1.20

自引率

0.00%

发文量

127

期刊介绍： Defect and Diffusion Forum (formerly Part A of ''''Diffusion and Defect Data'''') is designed for publication of up-to-date scientific research and applied aspects in the area of formation and dissemination of defects in solid materials, including the phenomena of diffusion. In addition to the traditional topic of mass diffusion, the journal is open to papers from the area of heat transfer in solids, liquids and gases, materials and substances. All papers are peer-reviewed and edited. Members of Editorial Boards and Associate Editors are invited to submit papers for publication in “Defect and Diffusion Forum” . Authors retain the right to publish an extended and significantly updated version in another periodical.