A Mix Design Procedure for Alkali-Activated High-Calcium Fly Ash Concrete Cured at Ambient Temperature

This research focuses on developing a mix design methodology for alkali-activated high-calcium fly ash concrete (AAHFAC). High-calcium fly ash (FA) from the Mae Moh power plant in northern Thailand was used as a starting material. Sodium hydroxide and sodium silicate were used as alkaline activator...

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Published inAdvances in materials science and engineering Vol. 2018; no. 2018; pp. 1 - 13
Main Authors Thumrongvut, Jaksada, Hanjitsuwan, Sakonwan, Damrongwiriyanupap, Nattapong, Phiangphimai, Chattarika, Phoo-ngernkham, Tanakorn, Chindaprasirt, Prinya
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2018
Hindawi
John Wiley & Sons, Inc
Wiley
Subjects
Aggregates
Ambient temperature
Bond strength
Calcium
Caustic soda
Cement
Civil engineering
Compressive strength
Concrete
Construction
Design engineering
Design modifications
Electric power generation
Fly ash
Gravity
Power plants
Sodium
Sodium hydroxide
Sodium silicates
Studies
Temperature
Thailand
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Summary:This research focuses on developing a mix design methodology for alkali-activated high-calcium fly ash concrete (AAHFAC). High-calcium fly ash (FA) from the Mae Moh power plant in northern Thailand was used as a starting material. Sodium hydroxide and sodium silicate were used as alkaline activator solutions (AAS). Many parameters, namely, NaOH concentration, alkaline activator solution-to-fly ash (AAS/FA) ratio, and coarse aggregate size, were investigated. The 28-day compressive strength was tested to validate the mix design proposed. The mix design methodology of the proposed AAHFAC mixes was given step by step, and it was modified from ACI standards. Test results showed that the 28-day compressive strength of 15–35 MPa was obtained. After modifying mix design of the AAHFAC mixes by updating the AAS/FA ratio from laboratory experiments, it was found that they met the strength requirement.
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ISSN:1687-8434
1687-8442
DOI:10.1155/2018/2460403