DOI QR코드

DOI QR Code

Effect of polymer addition on air void content of fine grained concretes used in TRCC

  • 투고 : 2017.03.13
  • 심사 : 2017.05.13
  • 발행 : 2017.08.25

초록

Textile Reinforced Cementitious Composite (TRCC) became the most common construction material lately and have excellent properties. TRCC can be employed in the manufacture of thin-walled facade elements, load-bearing integrated formwork, tunnel linings or in the strengthening of existing structures. These composite materials are a combination of matrix and textile materials. There isn't much research done about the usage of polymer modified matrices in textile reinforced cementitious composites. In this study, matrix materials named as fine grained concretes ($d_{max}{\leq}1.0mm$) were investigated. Air entraining effect of polymer modifiers were analyzed and air void content of fine grained concretes were identified with different methods. Aim of this research is to study the effect of polymer modification on the air content of fine grained concretes and the role of defoamer in controlling it. Polymer modifiers caused excessive air entrainment in all mixtures and defoamer material successfully lowered down the air content in all mixtures. Latex polymer modified mixtures had higher air content than redispersible powder modified ones. Air void analysis test was performed on selected mixtures. Air void parameters were compared with the values taken from air content meter. Close results were obtained with tests and air void analysis test found to be useful and applicable to fine grained concretes. Air void content in polymer modified matrix material used in TRCC found significant because of affecting mechanical and permeability parameters directly.

키워드

참고문헌

  1. Afridi, M.U.K., Ohama, Y., Demura, K. and Iqbal, M.Z. (2003), "Development of polymer films by the coalescence of polymer particles in powdered and aqueous polymer-modified mortars", Cement Concrete Res., 33(11), 1715-1721. https://doi.org/10.1016/S0008-8846(02)01094-3
  2. Aggelis, D.G., Verbruggen, S., Tsangouri, E. and Tysmans, T. (2016), "Monitoring the failure mechanisms of a reinforced concrete beam strengthened by textile reinforced cement using acoustic emission and digital image correlation", Smart Struct. Syst., 17(1), 91-105. https://doi.org/10.12989/sss.2016.17.1.091
  3. Ali, A.S., Jawad, H.S. and Majeed, I.S. (2012), "Improvement of the properties of cement mortar by using styrene butadiene rubber polymer", J. Eng. Develop., 16(3).
  4. Brameshuber, W., Brockmann, T., Hegger, J. and Molter, M. (2002), "Investigations on textile reinforced concrete", Beton, 52(9), 424-426.
  5. Brameshuber, W. (2006), Textile Reinforced Concrete-State-ofthe-Art Report, RILEM TC 201-TRC, 30-34.
  6. Brameshuber, W. and Brockmann, T. (2002), Matrix Design-Methodology and Material Relations, SFB 232, 195-233.
  7. Daskiran, E.G., Daskiran, M.M. and Gencoglu, M. (2016), "Development of fine grained concretes for textile reinforced cementitious composites", Comput. Concrete, 18(2), 279-295. https://doi.org/10.12989/cac.2016.18.2.279
  8. Hubbe, M. (2012), Mini-Encyclopedia of Papermaking Wet-End Chemistry, NC State University.
  9. Hofer, R., Jost, F., Schwuger, M.J., Scharf, R., Geke, J., Kresse, J., Lingmann, H., Veitenhansl, R. and Erwied, W. (2000), Foams and Foam Control, Ullmann's Encyclopedia of Industrial Chemistry.
  10. Larbia, A.S., Agbossoub, A.B. and Hamelina, P. (2013), "Experimental and numerical investigations about textilereinforced concrete and hybrid solutions for repairing and/or strengthening reinforced concrete beams", Compos. Struct., 99, 152-162. https://doi.org/10.1016/j.compstruct.2012.12.005
  11. Negim, E.S., Kozhamzharova, L., Khatib, J., Bekbayeva, L. and Williams, C. (2014), "Effects of surfactants on the properties of mortar containing styrene/methacrylate superplasticizer", Sci. World J., 10.
  12. Ohama, Y. (1995), Handbook of Polymer-Modified Concrete and Mortars, Noyes Publication.
  13. Powers, T.C. and Willis, T.F. (1950), "The air requirement of frost resistant concrete", 29,184-211.
  14. Soranakom, C. and Mobasher, B. (2009), "Flexural design of fiber-reinforced concrete", ACI Mater. J., 106(5), 461.
  15. Walk-Lauffer, B., Orlowsky, J. and Raupach, M. (2003), "Increase of bond properties within the roving in textile reinforced concrete", Int. Baustofftagung, 2, 281-290.
  16. Walters, D.G. "Concrete international", 14(4), 30-34.
  17. Wang, R. and Wang, P.M. (2011), "Action of redsipersible vinyl acetate and versatate copolymer powder in cement mortar", Constr. Build. Mater. J., 25(11), 4210-4214. https://doi.org/10.1016/j.conbuildmat.2011.04.060
  18. Wang, R., Wang, P.M. and Yao, L.J. (2012), "Effect of redispersible vinyl acetate and versatate cpolymer powder on flexibility of cement mortar", Constr. Build. Mater. J., 27(1), 259-262. https://doi.org/10.1016/j.conbuildmat.2011.07.050

피인용 문헌

  1. Seismic performance of PVA textile cementitious composites used as permanent formwork in full-scale circular RC columns vol.36, pp.None, 2022, https://doi.org/10.1016/j.istruc.2021.12.006