Influences of superabsorbent polymers on the strength and shrinkage properties of low water-to-binder ratio expansive concrete
2
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
Low water-to-binder ratio (W/B) is the main method to obtain the excellent mechanical properties of high performanceconcrete, which is also the main factor causing its shrinkage. Expansive agent is often used to reduce or even eliminateshrinkage. But the expansion effect isn’t obvious in the middle and later stage because of water shortage. Internal curing hasbeen considered to be a very effective way to maintain the relative humidity of the interior. This paper studied the influenceof SAP and additional water diversion on the strength and the limit expansion ratio of the expansive concrete with low W/B. SAP could reduce the shrinkage of 0.62 μm/m ~1.91 μm/m, and the compressive strength was further influenced. Inmicroscopic analysis, SAP was confirmed to promote the hydration degree of cement and expansive agent, especially in themiddle and later stages of hydration; the hydration products and the expansion products AFt intergrowth, the structure wasmore compact. Considering the influence of SAP on its expansion and mechanical properties, the reasonable amount of SAPwas recommended as 0.2 %, and the reasonable water flow was 10~20 times.
Abstract
Low water-to-binder ratio (W/B) is the main method to obtain the excellent mechanical properties of high performanceconcrete, which is also the main factor causing its shrinkage. Expansive agent is often used to reduce or even eliminateshrinkage. But the expansion effect isn’t obvious in the middle and later stage because of water shortage. Internal curing hasbeen considered to be a very effective way to maintain the relative humidity of the interior. This paper studied the influenceof SAP and additional water diversion on the strength and the limit expansion ratio of the expansive concrete with low W/B. SAP could reduce the shrinkage of 0.62 μm/m ~1.91 μm/m, and the compressive strength was further influenced. Inmicroscopic analysis, SAP was confirmed to promote the hydration degree of cement and expansive agent, especially in themiddle and later stages of hydration; the hydration products and the expansion products AFt intergrowth, the structure wasmore compact. Considering the influence of SAP on its expansion and mechanical properties, the reasonable amount of SAPwas recommended as 0.2 %, and the reasonable water flow was 10~20 times.
참고문헌 (34)
- V. Mechtcherine, , Mater. Struct, 47, pp.541~562 (2014)
- M. AN, , J. Build. Mater, 4(2), pp.159~166 (2001)
- H. -G. QIN, , J. Build. Mater, 14, pp.394~399 (2011)
- S. Mönnig, , Otto-Graf J, 16, pp.193~202 (2005)
- J. Liu, , Constr. Build. Mater, 146, pp.702~712 (2017)
- M. Wyrzykowski, , J. Mater. Civ. Eng, 24, pp.1006~1016 (2012)
- R.E. Philleo, , Mater. Sci. Concr, II, pp.1~8 (1991)
- "ACI 308R, Guide to Curing Concrete", American Concrete Institute, 2~ (2001)
- Autogenous Deformation and Internal Curing of Concrete, "P. Lura", Delft University of Technology, 11~ (2003)
- O. M. Jensen, , Cem. Concr. Res, 31(4), pp.647~654 (2001)
- M. Wyrzykowski, , Cem. Concr. Compos, 71, pp.1~9 (2016)
- F. Liu, , Cem. Concr. Res, 95, pp.39~46 (2017)
- L. Dudziak, , Proceedings of the 2nd International Conference of Textile Reinforced Concrete (ICTRC), pp.129~ (2010), RILEM Publications SARL Press
- V. Mechtcherine, , Mater. Struct, 47, pp.541~562 (2014)
- O. M. Jensen, , Cem. Concr. Res, 32, pp.973~978 (2002)
- D. Snoeck, , Cem. Concr. Res, 74, pp.59~67 (2015)
- S. Mönnig, , Proceedings of the RILEM Conference on Volume Changes of Hardening Concrete: Testing and Mitigation, pp.67~ (2006), RILEM Publications SARL Press
- M.T. Hasholt, , Proceedings of the International RILEM Conference on Use of Superabsorbent Polymers and Other New Additives in Concrete, pp.117~ (2010), RILEM Publications SARL Press
- P. Lura, , Proceedings of the RILEM Conference on Volume Changes of Hardening Concrete: Testing and Mitigation, pp.117~ (2006), RILEM Publications SARL Press
- M. T. Hasholt, , Adv. Civ. Eng. Mater, 4, pp.237~256 (2015)
- V. Mechtcherine, "Application of Superabsorbent Polymers (SAP) in Concrete Construction", pp.1~ (2012), Springer Press
- B. Craeye, , Proceedings of the RILEM Conference on Volume Changes of Hardening Concrete: Testing and Mitigation, pp.909~ (2006), RILEM Publications SARL Press
- B. Craeye, , Constr. Build. Mater, 25(1), pp.1~13 (2011)
- D.P. Bentz, , Proceedings of the International Seminar on Self-Desiccation and Its Importance in Concrete Technology, pp.195~ (2002), Lund University Press
- L. Dudziak, , Proceedings of the 2nd International Conference of Textile Reinforced Concrete (ICTRC), pp.129~ (2010), RILEM Publications SARL Press
- F. Wang, , ACI Mater. J, 106, pp.123~127 (2009)
- H. W. Reinhardt, , Warsaw, pp.291~300 (2009)
- V. Mechtcherine, "RILEM State of the Art Reports, 2", pp.115~134 (2012), Springer
- Powers, T.C., "Research Laboratories, PCA", Bulletin, 22, pp.473~488 (1948)
- Xiang-ming Kong, , Mater Struct, 48(9), pp.2741~2758 (2015)
- N. Nestle, , Micropor Mesopor Mater, 125, pp.51~57 (2009)
- Janis Justs, , J Therm Anal Calorim, 115, pp.425~432 (2014)
- Marianne Tange Hasholt, , Constr Build Mater, 31, pp.226~230 (2012)
- Hong-gen Qin, , J Build Mater, 13(4), pp.394~399 (2011)