한국도로학회논문집 제20권 제6호 (p.109-116)

콘크리트 도로시설물 적용을 위한 유무기계 하이브리드 모르타르 보수재의 성능평가

Performance of Combined Organic and Inorganic Hybrid Mortar as Repair Materials for Concrete Road Facilities
키워드 :
combined organic and inorganic hybrid mortar,repair materials,concrete road facilities,freezing-thawing resistance,microstructure

목차

ABSTRACT
1. 연구배경 및 목적
2. 실험개요
  2.1. 사용재료
  2.2. 배합 및 시험체 제작
  2.3. 실험방법
3. 실험결과 및 고찰
  3.1. 유동성
  3.2. 강도 특성
  3.3. 길이변화 특성
  3.4. 동결융해 저항성
  3.5. 미세구조 분석
4. 결론 및 요약
REFERENCES

초록

PURPOSES : The objective of this study is to evaluate the performance of combined organic and inorganic hybrid mortar used as repair materials (UM mortar) for concrete road facilities by comparison with cement repair materials (RM mortar).
METHODS: In order to produce UM mortar, four different levels of inorganic materials were adopted and the ratio of main resin to hardener was fixed at 1:2. For comparison, RM mortar made with cement repair materials was also produced. Fluidity, strength characteristics, length change, and freezing-thawing resistance of the mortars were measured at the predetermined periods. In addition, the microstructures of the mortars was performed on the 28-day mortar samples to examine the properties of the interfacial transition zone (ITZ).
RESULTS : It was observed that the mechanical properties, except for compressive strength, and freezing-thawing resistance of UM mortars were much better than those of RM mortar. Furthermore, showing a densified ITZ properties on the UM mortars from the microstructural observation, the usage of UM mortars exhibited a beneficial effect on the enhancement of mortar properties.
CONCLUSIONS: It is concluded that the application of combined organic and inorganic hybrid mortars is a possible option for the repair of deteriorated concrete road facilities.