Development of Sustainable Slag-based Geopolymer Concrete Using Different Types of Chemical Admixtures

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY International Journal of Concrete Structures and Materials Pub Date : 2024-05-09 DOI:10.1186/s40069-024-00672-1
Ismail Amer, Amr Abdelkhalik, Ola A. Mayhoub, Mohamed Kohail
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Abstract

Geopolymer concrete (GPC) has achieved a wide popularity since innovating it as an alternative to conventional concrete because of its superior mechanical characteristics and durability, in addition to being a green concrete due to its low negative impact on the environment. However, GPC still suffers from the problem of its poor workability which suppresses its spread in construction applications. This study investigated the most effective parameters on the workability of GPC including GGBFS content, water to binder ratio, and dosage of different types of chemical admixtures, Naphthalene-Based Admixture (NPA) and Polycarboxylate-Based Admixture (PCA), using Taguchi approach and Analysis of Variance (ANOVA) analysis considering the compressive strength at the different concrete ages. It was observed that NPA, in the geopolymer concrete, improved the compressive strength compared to PCA. The NPA-based mixes achieved the highest 28-day compressive strength, 69 MPa, with about 27.8% more than the highest 28-day compressive strength achieved by the PCA-based mixes, 54 MPa. The obtained results revealed that the NPA has achieved the best improvement for both the workability, in terms of initial slump value and slump loss rate, and the compressive strength of GPC mixes compared to PCA.

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使用不同类型的化学外加剂开发可持续的矿渣基土工聚合物混凝土
土工聚合物混凝土(GPC)因其优越的机械特性和耐久性而成为传统混凝土的替代品,并因其对环境的负面影响较小而成为绿色混凝土,自创新以来广受欢迎。然而,GPC 仍然存在工作性差的问题,这阻碍了它在建筑领域的推广。本研究采用田口方法和方差分析(ANOVA),考虑到不同混凝土龄期的抗压强度,研究了对 GPC 工作性最有效的参数,包括 GGBFS 含量、水与粘结剂的比率以及不同类型化学外加剂(萘基外加剂(NPA)和聚羧酸盐基外加剂(PCA))的用量。结果表明,与 PCA 相比,土工聚合物混凝土中的 NPA 提高了抗压强度。基于 NPA 的混合料达到了最高的 28 天抗压强度(69 兆帕),比基于 PCA 的混合料达到的最高 28 天抗压强度(54 兆帕)高出约 27.8%。结果表明,与 PCA 相比,NPA 对 GPC 混合料的工作性(初始坍落度值和坍落度损失率)和抗压强度都有最好的改善。
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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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