Performance and microstructural characterization of sustainable self-compacting geopolymer concrete with multi-component binders

IF 5.5 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Sustainable Chemistry and Pharmacy Pub Date : 2025-02-06 DOI:10.1016/j.scp.2025.101926

Naresh Thatikonda , Mainak Mallik , S Venkateswara Rao , Saurabh Dubey

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Abstract

The extensive use of Ordinary Portland Cement (OPC) in construction contributes significantly to global CO₂ emissions, necessitating sustainable alternatives. This study explores the potential of Self-Compacting Geopolymer Concrete (SCGC) as a green substitute. SCGC formulations incorporate Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBFS), Rice Husk Ash (RHA), and Micro Silica (MS) as binders, tested with solution-to-binder ratios of 0.5, 0.55, and 0.6. MS partially replaces RHA at 0%, 5%, 10%, and 15%, with fresh and hardened properties evaluated via workability, compressive strength, tensile strength, and flexural strength. Durability was assessed through porosity, sorptivity, Rapid Chloride Permeability (RCPT), and Accelerated Carbonation (ACPT), complemented by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-ray (EDX), and X-ray Diffraction (XRD) microstructural analyses. Results showed optimal performance at 15% MS, yielding a compressive strength of 62 MPa and a denser geopolymer matrix. Key phases identified include C/N-A-S-H, mullite, and calcium aluminate silicates, enhancing strength and durability. This research highlights SCGC as a viable, high-performance, and sustainable alternative to conventional concrete, supporting green infrastructure and reducing the environmental impact of the construction industry.

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多组分黏合剂可持续自密实地聚合物混凝土的性能与微观结构表征

普通波特兰水泥（OPC）在建筑中的广泛使用大大增加了全球二氧化碳排放，因此需要可持续的替代品。本研究探讨了自密实地聚合物混凝土（SCGC）作为绿色替代品的潜力。SCGC配方包括粉煤灰（FA）、磨粒高炉渣（GGBFS）、稻壳灰（RHA）和微二氧化硅（MS）作为粘合剂，溶液与粘合剂的比例分别为0.5、0.55和0.6。MS部分取代了0%、5%、10%和15%的RHA，通过可加工性、抗压强度、抗拉强度和抗折强度来评估其新鲜和硬化性能。通过孔隙度、吸附率、快速氯化物渗透率（RCPT）和加速碳化（ACPT）来评估耐久性，并辅以扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、能量色散x射线（EDX）和x射线衍射（XRD）微观结构分析。结果表明，在15% MS条件下，地聚合物的抗压强度为62 MPa，基质密度更高。确定的关键相包括C/N-A-S-H、莫来石和铝酸钙硅酸盐，以提高强度和耐久性。这项研究强调，SCGC是一种可行的、高性能的、可持续的传统混凝土替代品，支持绿色基础设施，减少建筑行业对环境的影响。

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来源期刊

Sustainable Chemistry and Pharmacy Environmental Science-Pollution

CiteScore

8.20

自引率

6.70%

发文量

274

审稿时长

37 days

期刊介绍： Sustainable Chemistry and Pharmacy publishes research that is related to chemistry, pharmacy and sustainability science in a forward oriented manner. It provides a unique forum for the publication of innovative research on the intersection and overlap of chemistry and pharmacy on the one hand and sustainability on the other hand. This includes contributions related to increasing sustainability of chemistry and pharmaceutical science and industries itself as well as their products in relation to the contribution of these to sustainability itself. As an interdisciplinary and transdisciplinary journal it addresses all sustainability related issues along the life cycle of chemical and pharmaceutical products form resource related topics until the end of life of products. This includes not only natural science based approaches and issues but also from humanities, social science and economics as far as they are dealing with sustainability related to chemistry and pharmacy. Sustainable Chemistry and Pharmacy aims at bridging between disciplines as well as developing and developed countries.