Geopolymer concrete as a cleaner construction material: An overview on materials and structural performances
Hemn Unis Ahmed,Lavan J. Mahmood,Muhammad Muhammad,Rabar H. Faraj,Shaker M. A. Qaidi,Nadhim Hamah Sor,Ahmed A. S. Mohammed,Azad A. Mohammed +7 more
TLDR
A comprehensive review on the fresh, mechanical, and structural performances of GPC is presented in this article , where the authors have explored the behaviour of geopolymer concrete (GPC) as an alternative to Portland cement concrete (PCC) in micro and macro dimensions.Abstract:
• A comprehensive review on the fresh, mechanical, and structural performances of GPC is presented. • Like traditional concrete, GPC has good fresh and mechanical properties. • The general behavior of the structural beam members is comparable to that of typical reinforced concrete structural elements. • Structural member design codes are applicable, but they are conservative in nature. The manufacture of ordinary Portland cement (OPC) produces a lot of CO 2 in the atmosphere. Researchers have recently focused on exploring the behaviour of geopolymer concrete (GPC) as an alternative to Portland cement concrete (PCC) in micro and macro dimensions. Geopolymers (GP) are innovative cement-based materials that could totally replace OPC composites. Geopolymer composites (GC) have a reduced carbon footprint and utilize less energy than OPC. The construction industry's main concerns are material characteristics and the performance of reinforced concrete (RC) structural components. Therefore, this review paper is going to look at some important material properties, like fresh characteristics, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity, as well as the evidence of the structural behaviour of GPC beams. According to the findings of this review, GPC offers similar or superior fresh and mechanical properties to conventional concrete composite. In addition, it was mentioned that GPC might be utilized to design GPC members securely in terms of their strength capabilities and standard codes of practice. Nevertheless, further study is suggested to include more detailed and cost-effective design methods for the potential use of GPC for large-scale field applications. read more
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A review of the sustainable utilisation of red mud and fly ash for the production of geopolymer composites
TL;DR: A review of the literature on the usage of red mud and fly ash (FA) in the production of red-mud-fly ash geopolymer composites (RM-FAGPC) is presented in this paper , which highlights the need for more research into the combination and proportion of these two raw materials with other cement-based materials.
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Influence of microsilica and polypropylene fibers on the fresh and mechanical properties of ultra-high performance geopolymer concrete (UHP-GPC)
TL;DR: In this article , the impact of microsilica and polypropylene fibers (PF) on the mechanical characteristics of an ultra-high performance geopolymer concrete (UHP-GPC) was identified.
Journal ArticleDOI
Ultra-high-performance fiber-reinforced concrete. Part V: Mixture design, preparation, mixing, casting, and curing
Mahmoud H. Akeed,Shaker M. A. Qaidi,Hemn U. Ahmed,Rabar H. Faraj,Samadar S. Majeed,Ahmed A. S. Mohammed,Wael Emad,Bassam A. Tayeh,Afonso Rangel Garcez de Azevedo +8 more
TL;DR: In this article , a detailed review of the various properties of UHPC is presented to offer key information for material testing criteria and methods and to broaden its practical uses, which can serve as a suitable substitute for concrete construction in hostile environments.
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Fly Ash-Based Geopolymer Composites: A Review of the Compressive Strength and Microstructure Analysis
Shaker M. A. Qaidi,Hadee Mohammed Najm,S. M. Abed,Hemn Unis Ahmed,Husam Al Dughaishi,Jawad Al Lawati,Mohanad Muayad Sabri Sabri,Fadi Alkhatib,Abdalrhman Milad +8 more
TL;DR: In this paper , the clean production, mix design, compressive strength (CS), and microstructure (Ms) analyses of the fly ash (FA)-GP concrete were reviewed to collect and publish the most recent information and data on FA-GP concrete.
Journal ArticleDOI
Influence of the proportion of materials on the rheology and mechanical strength of ultrahigh-performance concrete
TL;DR: In this paper , the influence of constituent material ratio on the fresh characteristics and compressive and flexural strengths of ultra-high-performance concrete was investigated, and the results revealed that increasing the superplasticiser dose enhanced compressive strength by up to 12% while increasing the water-to-binder ratio lowered it by 14%.
References
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Geopolymer technology: the current state of the art
Peter Duxson,Ana Fernández-Jiménez,John L. Provis,Grant C. Lukey,Ángel Palomo,J.S.J. van Deventer +5 more
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The mechanical properties of fly ash-based geopolymer concrete with alkaline activators
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Flexural strength and elastic modulus of ambient-cured blended low-calcium fly ash geopolymer concrete
Pradip Nath,Prabir Kumar Sarker +1 more
TL;DR: In this article, the authors investigated the properties of blended low-calcium fly ash geopolymer concrete cured in ambient condition, and they found that the density of hardened GPC mixtures is similar to that of normal-weight OPC concrete.
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