Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Evaluation of Properties of Polymer-Modified Mortar with CSA

CSA를 혼입한 폴리머 시멘트 모르타르의 성능평가

  • 주명기 (상지대학교 건설시스템공학과) ;
  • 노병철 (상지대학교 건설시스템공학과)
  • Received : 2014.09.25
  • Accepted : 2014.11.05
  • Published : 2015.01.30
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Abstract

Two main parameters were examined such as CSA content and polymer-binder ratio to find effects on the strength, water absorption, chloride ion penetration depth, carbonation depth, length change and chemical resistance of polymer-modified mortar with CSA and EVA polymer powder (EVAPP). As results, compressive, flexural, tensile, adhesive strengths, and length change of the polymer-modified mortar with CSA and EVAPP increases with increasing CSA content and polymer-binder ratio, although the water absorption, chloride ion penetration depth, and carbonation depth decrease with increasing polymer-binder ratio and CSA content, and also the chemical resistance decreases. Such strength and durability development is attributed to the high tensile strength of EVA polymer and the improved bond between cement hydrates and aggregates because of the addition of EVAPP and CSA.

본 연구에서는 CSA를 혼입한 폴리머 시멘트 모르타르의 강도, 흡수율, 염화 이온 침투 깊이, 중성화 깊이, 길이변화 및 내약품성에 미치는 영향에 대하여 실험적으로 구명하였다. 그 결과, CSA를 혼입한 폴리머 시멘트 모르타르의 압축, 휨, 인장 및 부착강도는 CSA 첨가량 및 폴리머-시멘트비가 증가함에 따라 증가하였다. 흡수율은 CSA 첨가량 및 폴리머-시멘트비가 증가함에 따라 감소하였다. 길이변화는 CSA 첨가량 및 폴리머-시멘트비가 증가함에 따라 감소하였다. 염화 이온 침투깊이 및 중성화 깊이는 CSA 첨가량 및 폴리머-시멘트비가 증가함에 따라 감소하였다. 또한, 내약품성은 CSA 첨가량 및 폴리머-시멘트비가 증가함에 따라 감소하였다. 이와 같은 강도 및 내구성 개선은 EVA 폴리머의 높은 인장강도에 기인하며, EVA 폴리머 및 CSA 혼입에 의하여 시멘트 수화물과 골재사이의 부착력이 개선되기 때문이라 판단된다.

Keywords

References

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