한국도로학회논문집 제20권 제6호 (p.1-9)

3중 마모휠 방법(ASTM C 779 B Type)을 이용한 실리카퓸과 폴리머 분말을 혼입한 콘크리트의 마모특성 분석

Analysis of Abrasion Resistance of Concrete Mixing Silica Fume and Polymer Powder Using Dressing Wheel Abrasion Method
키워드 :
two-layer concrete pavement,silica fume,polymer powder,concrete abrasion,durability

목차

ABSTRACT
1. 서론
  1.1. 논문개요
2. 이론적 배경
  2.1. 국내·외의 2층 콘크리트 포장
  2.2. 콘크리트 마모
  2.3. 실리카퓸 및 폴리머 분말
  2.4. Cellular Sprayed Concrete 공법
3. 실험계획 및 방법
  3.1. 실험계획
  3.2. 배합설계
  3.3. 시험재료
  3.4. 시험방법
4. 시험 결과
  4.1. 공기량 및 슬럼프 시험 결과
  4.2. 압축강도 및 휨강도 시험결과
  4.3. 염소이온 침투저항성 시험결과
  4.4. 화상분석 시험결과
  4.5. 콘크리트 마모 시험결과
5. 결론
REFERENCES

초록

PURPOSES : The purpose of this study is to analyze not only the strength but also the durability and abrasion resistance of concrete pavements as increasing the cases of domestic concrete pavement damage which do not meet the service years.
METHODS: The bottom layer of a two-lift concrete pavement was paved with original Portland cement (OPC) with 20~23 cm thickness. On the other hand, the top-layer, which is directly exposed to the environment and vehicles, was paved with high-performance concrete (HPC) with 7~10 cm thickness. For the optimal mixed design of the top-layer material of a two-lift concrete pavement, silica fume and polymer powder were mixed. Furthermore, it analyzes abrasion resistance of concrete as follow‘ ASTM C 779’which is dressing wheel abrasion test method.
RESULTS : As a result, abrasion resistance is improved with increasing the silica fume ratio. When the polymer powder is mixed, abrasion resistance of concrete is much improved. However, the effect of mixing ratio is not significant. It is very effective that adding both silica fume and polymer powder occur 20~40% of abrasion comparing with OPC variables.
CONCLUSIONS : The concrete strength and durability increased with silica fume and polymer powder. In particular, it is significant increasing strength of polymer powder under the flexural strength. In the abrasion resistance side, it is also significant when the silica fume and polymer powder used together.