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조강제를 함유한 플라이애쉬 시멘트 페이스트의 특징

이진용;조현수;이선우;이광명

  • 발행 : 2000.12.01

초록

Fly ash used as a cement replacement material increases the long term strength and also improves the durability of concrete and mortar. However, the use of fly ash is a little in spite of great benefit. In order to increase the consumption of fly ash, it has to be used as a cement replacement materials in the production of mortar and concrete, and the reduction of early strength development due to the use of fly ash also has to be diminished. In this study, many chemical compounds which accelerate the early strength was investigated. The $Na_2$$SO_4$, $K_2$$SO_4$, Triethanolamine were selected and applied to the production of mortar. It was found that they enhance the early strength development of mortar(1, 3day) and decrease the amount of $Ca(OH)_2$, and also increase the production of ettringite. According to the results of mercury instruction test, the pores ranged from 0.01 $\mu\textrm{m}$ to 5$\mu\textrm{m}$ were decreased and it was also found in the analysis of X ray and SEM that fly ash increases the amount of ettringite at early ages.

키워드

fly ash;high early strength admixture;ettringite;porosity

참고문헌

  1. 증기양생이 플라이애쉬 콘크리트 강도발현에 미치는 영향 v.10 no.1 pp.101-108 이진용;배성용
  2. ENR pp.13 In cement. Fly Ash Emerges as a Cure to Limit Greenhouse Gases Mehta, P. K.
  3. 한국콘크리트학회지 v.8 no.1 pp.50-55 플라이애쉬의 사용규정과 수요증가를 위한 고찰 이진용;배성용
  4. Cement and Concerte Research v.28 no.2 pp.197-208 Microscopic Study of Akali-activeted Fly ash Katz, A.
  5. Fly Ash in Cement and Concrete pp.101-123 Helmith, R.