본 연구에서는 안전한 수질의 밭 관개용수를 확보하기 위한 다기능 저류조 용수공급시스템을 현장에 적용하여, 효과를 검증하여 현장 적용성을 분석하였다. 용수의 수질 특성을 고려하여 적정 모듈 프로세스로 AOP (Advanced Oxidation Process), SF (Soil Filter)를 적용하였으며, 저류조의 효과 검증은 앞서 다기능 저류조 수처리 저감효율, 미생물 위해성 평가 등을 통해 수행하였다. 시범시설의 조사는 유입수(지표수, 지하수) 2개, 유출수 1개 지점을 2022년 5월부터 9월까지 월 1회(총 5회), 수온, TOC, COD 등 13개 수질항목을 측정하였다. 유출수에서 전항목 수질기준을 만족하였다. 다기능 저류조의 저감효율은 지표수에서 TOC 평균 19.2%, SS 평균 43.8%, T-N 평균 28.1%, T-P 평균 46.9%, Chl-a 평균 70.1%, 지하수에서 수온 평균 7.5% 상승, EC 평균 54.3%의 저감효율을 보여, 다기능 저류조의 수질정화 개선효과를 검증하였다. 미생물 위해성 평가 결과, 평균 위해도 값은 유입수(지하수) –3.02 × 10-6, 유입수(지표수) 2.79 × 10-5로 나타났으며, 다기능 저류저 처리 후 E.coli가 전량 사멸함에 따라 영농작업자의 위해성은 없을 것으로 나타났다.

PURPOSES: The objective of this study is to evaluate the properties of high-performance concrete and compare them with the properties of ternary blended cement (OPC 60% : BFS 30% : FA 10%) as applied to all-in-one bridge decks. High-performance concrete modified with styrene-butadiene latex (SB latex) was evaluated for strength development and durability through its compressive strength and chloride ion diffusion coefficient. METHODS: The compressive strength test was conducted according to KS F 2405, and the average value of the three specimens was used as the result at each stage. The chloride ion diffusion test was performed at 28 days, 56 days, and 365 days according to NT BUILLD 492. The chloride ion penetration test was conducted according to ASTM C 1202. RESULTS: For the compressive strength of the high-performance concrete, the blast furnace slag 40% replacement (BFS40) mixture had the most similar results to those of the ternary blended cement. The BFS40 mixture exhibited a lower compressive strength at 3 days than the latex modified concrete (LMC) mixture used for the bridge deck pavement, whereas it exhibited a 3.7-9.8% higher compressive strength at 7 days. In addition, the BFS40 mixture had the lowest diffusion coefficient, which was 49.1~59.0% lower than that of the LMC mixture. Mixing with latex tended to decrease in charge passed compared to Plain which is only used ternary blended cement, and showed excellent watertighness (rated “very low”), which is lower than 1,000 coulombs in all mixtures with latex. CONCLUSIONS : The BFS40 mixture exhibited excellent compressive strength, chloride ion permeability resistance, and the lowest chloride ion diffusion coefficient although it included a small amount of latex, which makes it more expensive than the current LMC mixture. It is believed that it is possible to secure excellent economic efficiency and durability by using lesser latex than that in the LMC mixture and using a mixture of the blast furnace slag instead.