The Effect of Superplasticizer on Performance of Roller Compacted Concrete Pavement Containing High Volume Fly Ash
Alaa Hasan Alnusair1, Herda Yati Katman2, Mohd Rasdan Ibrahim3, Noorhazlinda Abd Rahman4
1Alaa Hasan Alnusair, College of Engineering, Universiti Tenaga Nasional, Putrajaya Campus, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia.
2Herda Yati Katman, College of Engineering, Universiti Tenaga Nasional, Putrajaya Campus, Jalan IKRAM-UNITEN, Kajang, Selangor, Malaysia.
3Mohd Rasdan Ibrahim, Centre for Transportation Engineering, Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia.
4Noorhazlinda Abd Rahman, School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal, Pulau Pinang, Malaysia.

Manuscript received on November 12, 2019. | Revised Manuscript received on November 25, 2019. | Manuscript published on 30 November, 2019. | PP: 6316-6322 | Volume-8 Issue-4, November 2019. | Retrieval Number: D5113118419/2019©BEIESP | DOI: 10.35940/ijrte.D5113.118419

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Abstract: The use of roller compacted concrete pavement (RCCP) has increased noticeably over the last few decades, given its economic and environmental benefits. This type of concrete is known for its ability to incorporate natural wastes, such as fly ash. Moreover, to improve the performance and enhance the workability of RCCP, superplasticizer can be used. This study aims to investigate the effect of superplasticizer on the performance of high volume fly ash (HVFA) in RCCP. In achieving this aim, different mixtures of RCCP were prepared, where fly ash replaced 50% of the cement content, in addition to adding superplasticizer in quantities equal to 0%, 0.25%, 0.50%, and 0.75% by weight of the cementitious content. The results showed that up to 0.75% superplasticizer content that there was first, a positive relationship between the superplasticizer content and the compressive, splitting-tensile, and flexural strength. Secondly, increasing the superplasticizer content from 0% to 0.75% caused a noticeable improvement in the workability of the HVFA RCCP and caused a decrease in Vebe time of around 12 s. lastly, superplasticizer caused a reduction in porosity of HVFA RCCP and increased water absorption. Accordingly, this study revealed that it is possible to produce workable and durable concrete with high strength by adding superplasticizer to HVFA RCCP.
Keywords: Roller Compacted Concrete Pavement, Performance, Superplasticizer, High Volume Fly Ash.
Scope of the Article: Concrete Engineering.