논문 상세보기
pp.27-35
PURPOSES : In general, a high-performance concrete construction method is a method of loading mixed cement and other materials on a mobile mixer equipped with a concrete plant. However, the construction cost is high because the unit cost of the mixed cement is very high and the equipment usage fee of the mobile mixer is also high. To compensate for these drawbacks, a cellular spray concrete method was developed. This is a highly functional customized concrete construction method in which admixtures are added to high-flow concrete with cellular (air bubbles) added at the site and constructed through spraying.
METHODS : Field workability evaluation using cellular concrete was carried out using a spray method in 2017 and an anti-foaming agent in 2018. The test construction section was set as a new road-pavement construction site. After construction, strength, durability characteristics, and void analysis were performed to compare the construction methods. The results of laboratory tests under optimal conditions were also compared to the on-field results. By comparing the indoor mixing and the on-field results, we analyzed whether there were any problems concerning the performance expression. The economic feasibility at the initial construction stage was analyzed by comparing the existing and the cellular concrete construction methods in terms of material cost and equipment usage fee.
RESULTS : In the case of cellular spray concrete, construction through spraying is cumbersome, and the need to additionally use large equipment such as a pump car and compressor constitutes a disadvantage. However, the most relevant feature is that it can be constructed not only on the floor, but also on a slope. In the case of cellular concrete with an antifoaming agent, it was possible to quickly produce high-performance concrete using on-site remixing equipment. By supplying materials to the pouring surface using a conveyor, smooth construction and construction in narrow spaces were also possible.
CONCLUSIONS : The cellular concrete method allows the immediate on-site production of high-performance concrete, and it is possible to selectively apply spray construction, antifoaming agent construction, etc.
1. 서론
2. 고성능 콘크리트 시공방법
2.1. 이동식 믹서를 이용한 고성능 콘크리트 시공
2.2. 셀룰러 스프레이 공법을 이용한 고성능 콘크리트시공
2.3. 소포제를 이용한 고성능 셀룰러 콘크리트 시공
3. 셀룰러 재배합 콘크리트 시험시공
3.1. 개요
3.2. 셀룰러 재배합 콘크리트의 시공 순서
3.3. 사용재료
3.4. 실험방법
4. 시험결과
4.1. 압축강도 시험결과
4.2. 슬럼프 시험결과
4.3. 염소이온 침투 저항성 시험결과
4.4. 화상분석 시험결과
5. 시공방법에 따른 시공비 비교
5.1. 재료비 비교 고찰
5.2. 장비사용료 비교 고찰
6. 결론
REFERENCES
