Evaluating the Impact of Inclusion Metakaolin and Silica Fume on the Green and Mechanical Properties of Low Calcium Fly Ash Concrete

Evaluating the Impact of Inclusion Metakaolin and Silica Fume on the Green and Mechanical Properties of Low Calcium Fly Ash Concrete

Generally, low calcium fly ash concretes (FFACs) subjected to ambient temperatures exhibit low initial strengths. Thus, FFACs require higher temperatures to improve the monomer dissolutions, but that increases the energy consumption. Thus, this paper aims to evaluate the influence of the incorporati...

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Bibliographic Details
Published in:Annales de chimie (Paris. 1914) Vol. 46; no. 6; pp. 323 - 331
Main Authors: Al-Qutaifi, Sarah, Ethaib, Saleem, Awei, Yahya Resan
Format: Journal Article
Language:English
Published: Edmonton International Information and Engineering Technology Association (IIETA) 01-12-2022
Subjects:
Air Content
Ambient temperature
Calcium
Carbon dioxide
Caustic soda
Cement hydration
Concrete mixing
Curing
Density
Dosage
Energy consumption
Evaluation
Fly ash
Geopolymers
Mechanical properties
Metakaolin
Particle size
Physical properties
Room temperature
Silica
Silica fume
Sodium
Splitting
Superplasticizers
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Summary:Generally, low calcium fly ash concretes (FFACs) subjected to ambient temperatures exhibit low initial strengths. Thus, FFACs require higher temperatures to improve the monomer dissolutions, but that increases the energy consumption. Thus, this paper aims to evaluate the influence of the incorporation of different dosages of silica fume (SF) and metakaolin (MK) on the green and hardened properties of FFACs cured at room temperature of 21 ˚C. Slump and air content tests were applied to evaluate the green characteristics of the designed geopolymer concrete mixes (GPCMs). The hardened properties of FFACs were assessed in terms of compressive, flexural, and splitting tensile strengths at different curing ages. Outcomes revealed that the slump and air content of GPCMs declined with improving SF or MK percentages. The 28 days flexural, compressive, and splitting tensile strengths of FFACs manufactured with the optimum dosages of 20% MK and 10% SF cured at 21 ˚C were evidently higher than those of FFACs (100 % FFA) subjected to curing temperatures ranging from 10-to-50 ˚C. Also, the strength enhancement of MK was relatively comparable to those of SF with less requirement for superplasticizers.
ISSN:0151-9107
1958-5934
DOI:10.18280/acsm.460606