A Study on the Effects of Superabsorbent Polymers (SAP) on the Internal Curing Material of Self-compacting Concrete

  • Siwakorn Chitthawornmanee Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi
  • Witcha Singhawannurut Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi
  • Wichanath Phungman Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi
  • Pattamawan Bunya Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi
  • Weerachart Tangchirapat Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi
  • - -
  • Pattharaphon Chindasiriphan Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University
Keywords: bottom ash, crack-healing, high-performance concrete, internal curing, superabsorbent polymer

Abstract

This article presents the application of superabsorbent polymer (SAP) in self-compacting concrete using ground bottom ash as a cement replacement at 70% by weight of binder. In this study, SAP having particle sizes of 300-800 microns and absorption capability of 220 g/g was used as an internal curing material. Mixing method, SAP contents, and absorption capability of SAP in water and Ca(OH)2 solution were determined. The compressive strength and crack-healing of mortar and concrete containing SAP were investigated. The results found that the compressive strength of mortars containing SAP was decreased with the increased
SAP content. However, the use of SAP absorbed calcium hydroxide (Ca(OH)2) solution gave a positive results in terms of compressive strength as compared with mortar containing SAP absorbed tap water. In addition, SAP was able to heal up to 97% of micro-cracks within 8 days and can heal the crack completely within 28 days based on analysis of water flow through the cracks under continuous immersion conditions after it being created.

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Published
2022-09-07
How to Cite
[1]
S. Chitthawornmanee, “A Study on the Effects of Superabsorbent Polymers (SAP) on the Internal Curing Material of Self-compacting Concrete”, ncce27, vol. 27, pp. MAT07-1, Sep. 2022.
Issue
Vol 27 (2022): The 27th National Convention on Civil Engineering
Section
Construction Material Engineering

Copyright (c) 2022 The Engineering Institute of Thailand Under H.M. The King's Pratonage

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บทความทั้งหมดที่ได้รับการคัดเลือกให้นำเสนอผลงานในการประชุมวิชาการวิศวกรรมโยธาแห่งชาติ ครั้งที่ 27 นี้ เป็นลิขสิทธิ์ของ วิศวกรรมสถานแห่งประเทศไทย ในพระบรมราชูปถัมภ์

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