在隧道喷射混凝土材料中利用粉煤灰固体废弃物的试验研究

IF 3.5 3区 工程技术 Q3 ENERGY & FUELS
Zan Juncai, Ren Wanxing, Guo Qing
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引用次数: 0

摘要

粉煤灰在中国已成为一种突出的固体废弃物,引发了各种环境问题,并对包括人类在内的生物体健康构成威胁。为了提高这种废料的工业适用性,有人提出了一种新方法,即用粉煤灰代替砂作为煤矿巷道壁灌浆的主要原料。为了解决抗压强度低的问题,改善粉煤灰喷射混凝土材料的性能,提出了一种使用碱活化剂来激发粉煤灰化学活性的方法。使用抗压强度测试和扫描电子显微镜测试方法对喷射混凝土材料的长期有效性进行了评估。研究了粉煤灰取代砂子对喷射混凝土抗压强度的影响,以及硫酸钠(Na2SO4)、NaOH 和 Na2SiO3 对粉煤灰喷射混凝土的活化效果。结果表明,当 Na2SO4 的含量为 3% 时,粉煤灰喷射混凝土的抗压强度会有最佳改善。水泥与粉煤灰的理想比例为 1:3。因此,加入适量的碱性活化剂可有效解决粉煤灰喷射混凝土材料的抗压强度问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Experimental study on the utilization of Fly ash solid waste in tunnel shotcrete materials

Experimental study on the utilization of Fly ash solid waste in tunnel shotcrete materials

Fly ash has emerged as a prominent solid waste in China, leading to various environmental concerns and posing a threat to the health of living organisms, including humans. To enhance the industrial applicability of this waste material, a novel approach has been proposed wherein sand is replaced with fly ash as the primary raw material for wall grouting of coal mine roadways. To address the issue of low compressive strength and to improve the properties of fly ash shotcrete materials, a method employing an alkali activator to stimulate the chemical activity of fly ash has been put forward. The long-term effectiveness of the shotcrete material has been evaluated using compressive strength testing and scanning electron microscopy testing methods. The impact of replacing sand with fly ash on the compressive strength of shotcrete and the activation effect of sodium sulfate (Na2SO4), NaOH, and Na2SiO3 on fly ash shotcrete have been studied. The results indicate that the compressive strength of fly ash shotcrete shows optimal improvement when the content of Na2SO4 is 3%. The ideal ratio of cement to fly ash is 1:3. Therefore, incorporating an appropriate amount of alkaline activator could effectively address the compressive strength issues of fly ash shotcrete materials.

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来源期刊
Energy Science & Engineering
Energy Science & Engineering Engineering-Safety, Risk, Reliability and Quality
CiteScore
6.80
自引率
7.90%
发文量
298
审稿时长
11 weeks
期刊介绍: Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.
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