Influence of ultrafine steatite powder on the mechanical and durability properties of alkali-activated concrete

IF 1.5 4区工程技术 Q3 ENGINEERING, CIVIL Proceedings of the Institution of Civil Engineers-Engineering Sustainability Pub Date : 2022-07-26 DOI:10.1680/jensu.21.00103

R. Premkumar, Chokkalingam Ramesh Babu, V. Athira, A. Bahurudeen, M. Shanmugasundaram

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引用次数: 1

Abstract

Alkali activated binders are emerging sustainable binders in the construction sector due to their higher strength and superior resistance against aggressive environments than cement concrete. Steatite powder is obtained as a by-product from soapstone processing and disposed of as waste in large quantities. Studies on the reuse of steatite powder in alkali-activated concrete are highly narrow. Hence, the current research majors on the influence of ultra-fine steatite powder on the mechanical as well as durability properties of slag and fly ash-based alkali-activated concrete. Six replacement levels (10, 20, 30, 40, 50, and 60%) of slag and fly ash with steatite powder were adopted and activated using sodium-based activator. Heat curing and ambient curing were performed for fly ash-steatite concrete and slag-steatite concrete, respectively. From the test results, 30% steatite powder is optimum in slag and fly ash-based alkali-activated concretes. Lesser water absorption and higher resistance against acid exposure are observed for steatite used alkali-activated concrete specimens.

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超细滑石粉对碱活化混凝土力学性能和耐久性的影响

碱活化粘合剂由于其比水泥混凝土具有更高的强度和更强的抗侵蚀性，在建筑领域成为新兴的可持续粘合剂。滑石粉是由皂石加工得到的副产品，并作为废物大量处理。对滑石粉在碱活化混凝土中的再利用研究非常狭隘。因此，目前的研究重点是超细滑石粉对矿渣和粉煤灰基碱活化混凝土力学性能和耐久性的影响。采用10、20、30、40、50、60%的滑石粉替代矿渣和粉煤灰，采用钠基活化剂进行活化。对粉煤灰-滑石混凝土和矿渣-滑石混凝土分别进行了热养护和环境养护。从试验结果来看，在矿渣和粉煤灰基碱活化混凝土中，滑石粉的掺量为30%为最佳。使用碱活化的滑石混凝土试样，吸水率较低，抗酸暴露性较高。

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

Proceedings of the Institution of Civil Engineers-Engineering Sustainability ENGINEERING, CIVIL-ENGINEERING, CIVIL

CiteScore

3.70

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Engineering Sustainability provides a forum for sharing the latest thinking from research and practice, and increasingly is presenting the ''how to'' of engineering a resilient future. The journal features refereed papers and shorter articles relating to the pursuit and implementation of sustainability principles through engineering planning, design and application. The tensions between and integration of social, economic and environmental considerations within such schemes are of particular relevance. Methodologies for assessing sustainability, policy issues, education and corporate responsibility will also be included. The aims will be met primarily by providing papers and briefing notes (including case histories and best practice guidance) of use to decision-makers, practitioners, researchers and students.