Engineering Attributes of Ternary Geopolymer Mortars Containing High Volumes of Palm Oil Fuel Ash: Impact of Elevated Temperature Exposure

IF 3 3区 农林科学 Q2 ECOLOGY Fire-Switzerland Pub Date : 2023-08-30 DOI:10.3390/fire6090340
Ghasan Fahim Huseien, Z. Kubba, S. K. Ghoshal
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引用次数: 1

Abstract

Geopolymer mortars made from various waste products can appreciably reduce carbon dioxide emissions and landfill-related issues, making them viable substitutes for ordinary Portland cement, a workhorse in the concrete industry. Thus, a series of ternary geopolymer mortars were made and characterized to determine the effects of exposure to elevated temperatures (from room temperature up to 900 °C) on their engineered (residual compressive strength, weight loss, and slant shear bond strength) and microstructural properties. These mortars, which contain fly ash, ground blast furnace slag, and a high volume of palm oil fuel ash, were designed to activate via the incorporation of an alkali activator solution at a low concentration (molarity of 4). The elevated temperature-mediated deterioration of the ternary geopolymer mortar was quantified using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis. The results revealed an improvement in the ternary geopolymer mortars’ resistance against elevated temperatures when the palm oil fuel ash level in the mortar matrix was raised from 50 to 70% and when slag was replaced by fly ash. It was asserted that the proposed ternary geopolymer mortars may contribute to the advancement of green concretes demanded by the construction sectors.
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含有大量棕榈油燃料灰的三元地质聚合物砂浆的工程特性:高温暴露的影响
由各种废物制成的地质聚合物砂浆可以显著减少二氧化碳排放和垃圾填埋相关问题,使其成为混凝土行业主力军普通硅酸盐水泥的可行替代品。因此,制备并表征了一系列三元地质聚合物砂浆,以确定暴露于高温(从室温到900°C)对其工程(残余抗压强度、重量损失和倾斜剪切粘结强度)和微观结构性能的影响。这些砂浆含有粉煤灰、高炉矿渣和大量棕榈油燃料灰,设计用于通过掺入低浓度(摩尔浓度为4)的碱性活化剂溶液进行活化。使用傅里叶变换红外光谱、X射线衍射、扫描电子显微镜和热重分析对三元地质聚合物砂浆的高温介导的劣化进行了量化。结果表明,当砂浆基质中的棕榈油燃料灰含量从50%提高到70%时,以及当矿渣被粉煤灰取代时,三元地质聚合物砂浆的耐高温性能有所提高。有人断言,拟议的三元地质聚合物砂浆可能有助于推进建筑行业所需的绿色混凝土。
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来源期刊
Fire-Switzerland
Fire-Switzerland Multiple-
CiteScore
3.10
自引率
15.60%
发文量
182
审稿时长
11 weeks
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