• Title/Summary/Keyword: Re-dispersible polymer

Search Result 4, Processing Time 0.019 seconds

Properties of Polymer Modified Mortars Using Re-dispersible Polymer Powders (재유화형 분말수지를 이용한 폴리머 시멘트 모르타르의 특성)

  • Bae, Sang-Chan;Hyung, Won-Gil
    • Journal of the Korea Institute of Building Construction
    • /
    • v.13 no.3
    • /
    • pp.235-241
    • /
    • 2013
  • In this study, a mortar was produced using re-dispersible polymer powders that addresses the defects of aqueous polymer and improves the durability of cement mortar. Also, an attempt was made to examine the properties of polymer modified mortars using re-dispersible polymer powders by strength and durability tests between ordinary Portland cement mortars and polymer modified mortars mixed with aqueous dispersion. The test showed that strength and durability are improved considerably compared with ordinary Portland cement mortar, and the performance of aqueous polymer cement mortar was considerably improved. Accordingly, it is expected that high-quality prepackaged polymer modified mortars can be produced using re-dispersible polymer powders.

Fundamental Properties Polymer-Modified Mortars Using Re-dispersible Polymer Powder (재유화형 폴리머를 혼입한 폴리머 시멘트 모르타르의 기초적 특성)

  • Jang, Kun-Young;Ryu, Dong-Woo
    • Journal of the Architectural Institute of Korea Structure & Construction
    • /
    • v.34 no.11
    • /
    • pp.37-43
    • /
    • 2018
  • According to the evaluation of basic properties and mechanical characteristics of polymer cement mortars that contain re-dispersible type polymer, in the case of fresh mortars, flow and air content were increased due to the dispersion action of entrained air and surfactant with an increase of polymer addition ratio. In the case of mortars after hardening, flexural strength, bonding strength, absorption rate and carbonation resistance were improved due to the increased union and waterproof characteristics of internal structures as a result of the formation of polymer film.

Fundamental Properties Polymer-Modified Mortars Using Re-dispersible Polymer Powder (재유화형 폴리머를 혼입한 폴리머 시멘트 모르타르의 내화특성)

  • Jang, Kun-Young;Ryu, Dong-Woo
    • Journal of the Architectural Institute of Korea Structure & Construction
    • /
    • v.35 no.3
    • /
    • pp.35-41
    • /
    • 2019
  • In this study, the fire resistance performance of polymer cement mortars which are used as a representative repair material for section restoration, is evaluated and residual bond strength is measured by considering unity with concrete. According to the evaluation of fire resistance performance of re-emulsification type polymer cement mortars, residual compressive strength was drastically decreased according to heating temperatures with an increase of polymer addition rate, and this seems to be attributable to the application of polymer film. In addition, an explosion phenomenon occurred frequently with an increase of addition rate, so this should be considered when selecting repair materials and processing.

Properties of Polymer Modified Mortars Substitution Re-dispersible Polymer Powders (재유화형 폴리머를 첨가한 폴리머시멘트 모르타르의 특성)

  • Jang, Kun-Young;Ryu, Dong-Woo;Jeon, Chan-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
    • /
    • 2018.05a
    • /
    • pp.19-20
    • /
    • 2018
  • For this study, a test was conducted on the basic polymer property depending on the replacement amount of polymer. The result showed that the flow of slump was increased with the increase of polymer replacement amount and an amount of air entraining. In addition, with a decrease of unit W/B, an amount of bleeding was reduced, and the first and final time for 6% replacement amount was found to be the fastest. This implies that replacement of more than 6% may affect the hydration of cement.

  • PDF