Green Concrete: An Eco-Friendly Alternative to the OPC Concrete

IF 3.1 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Dr. Ahmad Fuzail Hashmi, M.S. Khan, M. Bilal, M. Shariq, A. Baqi
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引用次数: 8

Abstract

The popularity of concrete has resulted in the considerable consumption of natural resources and significant emission of CO2 gas into the atmosphere. The key constituents of the concrete are the cement and the natural aggregates. These major concrete elements are recommended to be replaced with other materials to solve sustainability issues. Hence, by-products like pulverized granular blast-furnace slag, fly ash, rice husk ash, silica fume, recycled coarse aggregates etc., are added to the concrete to utilize the waste products and produce sustainable concrete. Cement manufacturing accounts for 8 to 10% of total global CO2 emissions. The construction industry is progressively adopting green concrete use in buildings because of its inherent benefits and limitations of traditional concrete. Green concrete is available in a variety of forms such as high-volume fly ash concrete, alkali-activated concrete, recycled aggregate concrete, ultra-high performance concrete, geopolymer concrete etc. Green concrete has various environmental, technical, and economic advantages i.e.,  greater durability, enhanced workability, and pumpability, decreased permeability, controlled bleeding, higher acid resistance, and decreased plastic shrinkage cracking. These properties encourage faster concrete production, shorter curing times, lower construction costs, earlier project completion, lower maintenance costs, and longer service life of construction projects. This review article aims to comprehensively explain the fresh, hardened, and durability properties of green concrete and knowledge gaps in green concrete. The literature revealed that further research is needed to accurately assess the long-term properties, notably creep and shrinkage behaviour of structural or reinforced elements of green concrete.
绿色混凝土:OPC混凝土的环保替代品
混凝土的普及导致了大量的自然资源消耗和大量的二氧化碳气体排放到大气中。混凝土的主要成分是水泥和天然骨料。建议用其他材料代替这些主要的混凝土元素,以解决可持续性问题。因此,在混凝土中加入颗粒状高炉渣粉、粉煤灰、稻壳灰、硅灰、再生粗骨料等副产品,利用废料生产可持续混凝土。水泥制造业占全球二氧化碳排放总量的8%到10%。由于传统混凝土固有的优点和局限性,建筑行业正在逐步采用绿色混凝土在建筑中的应用。绿色混凝土有多种形式,如大体积粉煤灰混凝土、碱活性混凝土、再生骨料混凝土、超高性能混凝土、地聚合物混凝土等。绿色混凝土具有各种环境,技术和经济优势,即更大的耐久性,增强的和易性和泵送性,降低渗透性,控制出血,更高的耐酸性和减少塑性收缩开裂。这些特性促使混凝土生产速度更快,养护时间更短,施工成本更低,工程完工时间更早,维护成本更低,建筑工程使用寿命更长。这篇综述文章旨在全面解释绿色混凝土的新鲜,硬化和耐久性性能以及绿色混凝土的知识空白。文献表明,需要进一步的研究来准确地评估绿色混凝土的长期性能,特别是结构或增强构件的徐变和收缩行为。
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
Construction Innovation-England
Construction Innovation-England CONSTRUCTION & BUILDING TECHNOLOGY-
CiteScore
7.10
自引率
12.10%
发文量
71
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