Effect of source materials, additives on the mechanical properties and durability of fly ash and fly ash-slag geopolymer mortar: A review

Published on Apr 19, 2021in Construction and Building Materials6.141
路 DOI :10.1016/J.CONBUILDMAT.2021.122443
Shaise K John3
Estimated H-index: 3
(College of Engineering, Trivandrum),
Yashida Nadir6
Estimated H-index: 6
(College of Engineering, Trivandrum),
K. Girija2
Estimated H-index: 2
(College of Engineering, Trivandrum)
Source
Abstract
Abstract Geopolymer is a sub-class of alkali activated materials composed of base materials containing aluminosilicates which can be used for construction with reduced environmental impact by utilisation of waste material leading to economical construction. This study reviews the properties of fly ash and fly ash-slag geopolymer mortar including microstructural properties, fresh properties such as setting time and workability, hardened properties such as compressive strength and tensile strength and durability properties (thermal resistance, shrinkage, acid resistance, chloride resistance, sulphate resistance). The effect of types of alkaline solutions, its concentration, and combination of different types of alkaline activators, fine aggregate to binder ratio, alkaline solution to binder ratio, curing temperature and curing duration, and presence of different types of superplasticizers are discussed. The study also reviews the effect of different additives such as silica fume, alccofine, quartz powder, alumina, epoxy, bio-additives, different types of fibres, nano-materials in fly ash and fly ash-slag geopolymer mortar. The present study carried out elaborate discussion of the effect of mix proportioning on fresh, hardened and durability properties of fly ash geopolymer and fly ash-slag geopolymer mortar. The study summarises the common findings from the reviewed research papers.
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References184
Newest
#1M. Sivasakthi (SRM University)H-Index: 3
#2R. Jeyalakshmi (SRM University)H-Index: 8
Last. N. P. Rajamane (SRM University)H-Index: 9
view all 3 authors...
Abstract Geopolymer materials are increasingly finding application in various settings because of their excellent mechanical properties and their ability to reduce the level of CO2 emission in the atmosphere, thus contributing to a sustainable environment. Mortars containing an alkali-activated fly ash binder in which river sand is used as an aggregate are found to display poor adhesive strength and incompatibility at elevated temperatures, necessitating researchers to look for alternate aggrega...
Source
#1Xiaolu Guo (Tongji University)H-Index: 15
#2Junyi Yang (Tongji University)H-Index: 1
Last. Guiyan Xiong (Tongji University)H-Index: 1
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Abstract 3D printed fly ash based geopolymer was prepared with fly ash and quartz sand as main raw materials while slag powder and silica fume as supplementary cementitious materials. In this paper, anhydrous sodium silicate powder was used as activator and ATTAGEL-50 thixotropic thickener was used as 3D printing additive. The effect of slag powder and silica fume on the rheological properties of 3D printed fly ash based geopolymer was studied. The results show that the apparent viscosity, thixo...
Source
The inorganic structure formed at the stage of setting of the geopolymer binder ensures high durability of the material under high-temperature conditions. However, changes in the microstructure of the material are observed. The purpose of the study was to analyze changes in the structure of geopolymer mortar after exposure to high temperatures T = 200, 400, 600, 800, and 1000 掳C. Mortars with a binder based solely on fly ash (FA) and mixed in the 1:1 ratio with a binder containing fly ash and gr...
Source
#1Kas谋m Mermerda艧 (Harran University)H-Index: 22
#2Zeynep Alg谋n (Harran University)H-Index: 9
Last. S Ekmen (Harran University)H-Index: 3
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Abstract The aim of the study is to determine the impact of various NaOH molarities, sodium silicate-to-sodium hydroxide ratios, binder amounts and the age on the compressive strength and free shrinkage of fly ash based lightweight geopolymer mortars. After experimental evaluation the data were used to model and optimize mix proportions of lightweight geopolymer mortars through response surface method. NaOH molarities were determined as 6鈥疢, 8鈥疢 and 10鈥疢. sodium silicate-to-sodium hydroxide rati...
Source
#1Zhenming Li (TU Delft: Delft University of Technology)H-Index: 11
#2Tianshi Lu (TU Delft: Delft University of Technology)H-Index: 4
Last. Guang Ye (UGent: Ghent University)H-Index: 56
view all 5 authors...
Abstract This study aims to provide a better understanding of the autogenous shrinkage of slag and fly ash-based alkali-activated materials (AAMs) cured at ambient temperature. The main reaction products in AAMs pastes are C-A-S-H type gel and the reaction rate decreases when slag is partially replaced by fly ash. Due to the chemical shrinkage and the fine pore structure of AAMs pastes, drastic drop of internal relative humidity is observed and large pore pressure is generated. The pore pressure...
Source
#1Mostafa Seifan (University of Waikato)H-Index: 14
#2Shaira Mendoza (University of Waikato)H-Index: 1
Last. Aydin Berenjian (University of Waikato)H-Index: 30
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Abstract The aim of this paper is to investigate the influence of nano-silica (NS) and micro-silica (MS) on the properties of fly ash based geopolymer mortar. The use of such additives has the potential to provide greener and cheaper concrete with enhanced properties. A screening study was conducted to compare the performance of mortar containing varying percentages of NS and MS (up to 15%). The performance of each specimen was determined through tests on compressive strength, splitting tensile ...
Source
#1Bharat Bhushan Jindal (Shri Mata Vaishno Devi University)H-Index: 10
#2Rahul Sharma (Shri Mata Vaishno Devi University)H-Index: 6
Abstract Nanomaterials, owing to their extraordinary properties are known to improve the microstructure of concrete, enhances the fresh and hardened properties of cement concrete, are widely used in cementitious materials. Many studies have been conducted so far to understand the effects of inclusion of nanomaterials on the geopolymerisation reaction, fresh and hardened state properties, microstructure, and durability of geopolymer composites. The current paper summarizes these studies mainly fo...
Source
The influence of calcium bentonite addition on the compressive strength, efflorescence extent and drying shrinkage of fly-ash based geopolymer mortar was investigated. The results showed that appro...
Source
#1Peng Zhang (Zhengzhou University)H-Index: 17
#2Kexun Wang (Zhengzhou University)H-Index: 5
Last. Yifeng Ling (Iowa State University)H-Index: 13
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Abstract Concretes based on geopolymers/alkali-activated binders have attracted considerable attention as the promising construction and repair materials since their discovery because of their superior properties. Moreover, less pollution was caused by geopolymer/alkali-activated concretes than conventional cement concretes. In this paper, 173 investigations reported in related literatures are integrated, and a comprehensive review on the fabrication and engineering properties of a variety of ge...
Source
#1Minhao Dong (UWA: University of Western Australia)H-Index: 11
#2Mohamed Elchalakani (UWA: University of Western Australia)H-Index: 27
Last. Ali Karrech (UWA: University of Western Australia)H-Index: 23
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AbstractThis study compared the effect of seven common curing conditions on the compressive strength, pore alkalinity, efflorescence, and shrinkage of five alkali-activated fly ash and slag (AAFS) ...
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Cited By7
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#1Arnab Kumar Sinha (IITG: Indian Institute of Technology Guwahati)
#2Sudip Talukdar (IITG: Indian Institute of Technology Guwahati)H-Index: 10
Abstract null null Application of high-volume slag based geopolymer mortar is often confined to usage in controlled environments due to its limited flexibility in controlling the setting time. The main aim of the study is to regulate the fast setting of Ultrafine blast furnace slag (UBFS)-based geopolymer mortar (GM) by utilizing mineral admixture. UBFS, partially replaced by Flyash (FA), are investigated by both sodium hydroxide (SH), and a combined solution of sodium hydroxide and sodium silic...
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#2Habib AbdurrahmanH-Index: 2
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Last. An Cheng
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In this study, ultra-fine spherical particles of silica fume and reactive ultra-fine fly ash were added to a mixture of commercial ultra-high-performance grout (UHPG) with the aim of enhancing the rheological properties, compressive strength, compactness, and permeability. This commercial UHPG study was conducted in collaboration with Triaxis Corporation (Changsha city, Hunan province, China). A water-to-binder ratio of 0.21 and a binder-to-fine aggregates ratio of 1.17 were used as fixed parame...
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#1Wang HongguangH-Index: 1
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The current work aimed to explore the effect of Na/Al ratios of 0.43, 0.53, 0.63, 0.73, 0.83, and 0.93, using NaOH to alter the molar ratio, on the mechanical properties of a geopolymer material, with fixing of the Si/Al molar ratio. While fixing the Na/Al molar ratio, alteration of the Si/Al ratios to 1.7, 1.75, 1.8, 1.85, 1.9, 1.95 was used, with silica fume and sodium silicate as a silica corrector. The influence on the micromorphology and macro-strength of samples was characterized through S...
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#1Shaise K JohnH-Index: 3
#2Alessio CascardiH-Index: 11
Last. K. GirijaH-Index: 2
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Geopolymers are inorganic polymers produced by the alkali activation of alumina-silicate minerals. Geopolymer is an alternative cementitious binder to traditional Ordinary Portland Cement (OPC) leading to economical and sustainable construction technique by the utilisation of alumina-silicate waste materials. The strength development in fly ash-slag geopolymer mortar is dependent on the chemical composition of the raw materials. An effective way to study the effect of chemical components in geop...
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#1Ng Hui-Teng (UniMAP: Universiti Malaysia Perlis)H-Index: 1
#2Heah Cheng-Yong (UniMAP: Universiti Malaysia Perlis)H-Index: 6
Last. Ng Yong-Sing (UniMAP: Universiti Malaysia Perlis)H-Index: 1
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Abstract This paper presents the formulation of fly ash (FA) geopolymer and the incorporation of ladle furnace slag (LFS) as a replacement to FA in geopolymer formation. The formulation of the LFS replacement was set at 10 鈥 40 wt.%. The geopolymer was formed by mixing FA and LFS with a sodium-based alkali activator. The FA geopolymer had a compressive strength of 38.9 MPa with the optimum formulation of 8M NaOH concentration, AS/AA ratio of 3, and AA ratio of 1.5. The compressive strength was a...
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#1Juan BoschH-Index: 5
#2Ulises MartinH-Index: 4
Last. David M. BastidasH-Index: 22
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