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Divyank Manish

Bio: Divyank Manish is an academic researcher from VIT University. The author has contributed to research in topics: Metakaolin & Ultrasonic pulse velocity test. The author has an hindex of 1, co-authored 1 publications receiving 15 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, three variations in terms of weight percentages of ground granulated blast furnace slag and metakaolin clay have been taken with 80%-20%,50%-50%, and 20%-80% respectively.

27 citations


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Journal ArticleDOI
TL;DR: A holistic approach for the first scientometric review on geopolymer concrete is described in this paper, which embraced an all-inclusive review concept using scientometric analysis and science mapping technology, and comprehensive discussion to highlight the most influential publication sources, most used keywords, most active researchers and institutions, as well as literature with the highest impact on the field of Geopolymer concrete.

91 citations

Journal ArticleDOI
01 Dec 2021
TL;DR: In this paper, the authors evaluated the energy and emission of alkali-activated concrete (AAC) and ordinary Portland cement concrete (OPCC) across different classifications of concrete compressive strength.
Abstract: Research has shown that alkali-activated concrete (AAC) is comparable to ordinary Portland cement concrete (OPCC) in terms of mechanical properties and may offer ecological benefits compared to OPCC. This study evaluates the energy and emission of AAC and OPCC across different classifications of concrete compressive strength (40, 60, and 100 ​MPa). Analysis indicates that the selection of constituent materials can substantially affect the energy and emission of AAC and OPCC. Ordinary Portland cement (OPC) is the principal contributor to the energy and emission of OPCC, accounting for 80% of energy and 91% of emissions of OPCC. The activating solution, meanwhile, is the main contributor to the energy and CO2 emission of AAC. Normal strength AAC (40 ​MPa) shows 46% less energy and 73% less CO2 emission than OPCC. However, high-strength AAC (60 ​MPa), using metakaolin as a base material, experiences higher energy (8%) than OPCC yet the emission is 40% less than OPCC. A substitution of fly ash for metakaolin results in superior efficiency of AAC compared to OPCC. Two mixtures of ultra-high-strength AAC (100 ​MPa) result in contradictory findings. One mixture with a sodium hydroxide and silica fume activating solution shows 5% and 30% less energy and CO2 emission, while the other mixture with a sodium hydroxide and sodium silicate activating mixture is less efficient than OPCC.

70 citations

Journal ArticleDOI
TL;DR: In this article, the effect of mix design parameters on the behavior of geopolymer concrete (GPC) produced using local metakaolin (MK) is not well established, and some useful models are proposed for predicting workability, splitting tensile strength, water absorption, and weight loss in abrasion for MK-based GPC.
Abstract: Geopolymer is emerging as a potential alternative material to the ordinary Portland cement (OPC) owing to its energy efficiency and environmental protection. However, the effect of the mix design parameters on the behavior of geopolymer concrete (GPC) produced using local metakaolin (MK) is not well established. This paper presents findings from a comprehensive experimental program to study the effect of various mix design parameters on the properties of fresh and hardened MK-based GPC. Seventeen mixes were cast in four groups to investigate the effect of four parameters, including sodium silicate to sodium hydroxide ratio, alkaline solids to MK ratio, aggregate content, and water to solids ratio on the properties of GPC. The investigated properties included workability, density (wet and dry), development of compressive strength with age, splitting tensile strength, ultrasonic pulse velocity, water absorption, and horizontal abrasion resistance. Besides, two reference OPC concrete mixes, equivalent to two MK-based geopolymer mixes, were tested for the sake of comparison. The test results were helpful in developing a better understanding of the behavior of MK-based GPC. Some useful models are proposed for predicting workability, splitting tensile strength, water absorption, and weight loss in abrasion for MK-based GPC. The test results were supplemented and confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) analysis performed on some selected GPC mixes.

69 citations

Journal ArticleDOI
TL;DR: In this article, the authors provide an in-depth overview of the work that has been done to explore different aspects of geopolymerization and develop a comprehensive database, from past research work, that elaborates on influence of important factors like physico-chemical properties of precursors, blending, curing, additives, aggressive environmental conditions and chemical activation.

66 citations

Journal ArticleDOI
Pravesh Kumar Tiwari1, Prashant Sharma1, Neha Sharma1, Mohit Verma1, Rohitash1 
TL;DR: In this paper, the effect of replacing of cement by Metakaolin and Ground granulated blast furnace slag, coarse aggregate was replaced by demolished waste materials crushed up to less than 20mm size.

31 citations