아스팔트의 위생학적 이용에 관한 연구

• 영문명: Studies on the Sanitary Scientific Utilization of Asphalt Acid va1ues determination of asphalt by improved indicator titration
• 발행기관: 한국환경보건학회
• 저자명: 우세홍(Se.Hong Woo) 김선덕(Sun.Duek Kim) 주대수(Dae.Soo Chu)
• 간행물 정보: 『한국환경보건학회지』제1권 제1호, 32~35쪽, 전체 4쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 1974.01.30

영문 초록

Acidic substances contained in asphalt are affect upon emulsitiabiJity of asphalt and its adhesion with aggregates, and therfore, detemination of acidity of asphalt is of important one. However, there has not been established a method of precisely determining the acidity of asphalt. This paper reports on an improved color.indicator titration method, by which the acid number 。f asphalt is determined. By treating beI).zene solution of asphalt with alcohol, acidic constituents were selectively eXtracted into alcohol solution, while asphaltic matters precipitated. A color-indicator titration method then was applied to the resultant faint.colored solution. The change of color at end point was clearly observed, and the results were obtained with g∞d reproductivity and checked wel1 with the results by the I. P. 177164 method. Alcohols having not more than three cabon atoms have been found suitable for extraction.

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