Optimization of fly ash based geopolymer mix design for rigid pavement application

This study was carried out to overcome major problem in flexible asphalt pavement and conventional rigid pavement that used Ordinary Portland Cement (OPC). Because of expensive maintenance cost of flexible pavement, rigid pavement is a solution for the dilemma. However, based on previous research fo...

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Bibliographic Details
Main Authors: Tahir, Muhammad Faheem Mohd, Abdullah, Mohd Mustafa Al Bakri, Hasan, Mohd Rosli Mohd, Zailani, Warid Wazien Ahmad
Format: Conference Proceeding
Language:English
Subjects:
Asphalt pavements
Bituminous cements
Carbon dioxide
Caustic soda
Cement
Chemical composition
Compressive strength
Energy consumption
Flexible pavements
Fly ash
Greenhouse effect
Greenhouse gases
Maintenance costs
Mechanical properties
Morphology
Optimization
Organic chemistry
Portland cements
Rigid pavements
Scanning electron microscopy
Sodium hydroxide
Sodium silicates
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Summary:This study was carried out to overcome major problem in flexible asphalt pavement and conventional rigid pavement that used Ordinary Portland Cement (OPC). Because of expensive maintenance cost of flexible pavement, rigid pavement is a solution for the dilemma. However, based on previous research found that Ordinary Portland Cement emitted large amount of greenhouse gases known as carbon dioxide that effect environmental surrounding. So fly ash based geopolymer is proposed to solve the problem because the energy consumption (than lead to emission of carbon dioxide) is less compare to ordinary Portland cement. Fly ash based geopolymer is obtained by mixed of fly ash and alkaline activator. The alkaline solution is divide into molarity of sodium hydroxide which 12M and different ratio of sodium silicate to sodium hydroxide 1.5, 2.0, 2.5, 3.0. Next different sample solid to liquid with ratio of 1.5, 2.0, 2.5, and 3.0. All of the sample then cure at room temperature. Then, the sample morphology will be analyse using Scanning Electron Microscopy while the chemical composition is analyse by X-Ray Fluorescence. Then mechanical properties test by Unconfined Compressive Strength. It noted that from this study, the higher strength and properties can be obtained and implement into application of rigid pavement.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5118152