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Material Properties of Repair Mortar Considering Accelerator Type and Curing Conditions

급결제 종류 및 양생조건을 고려한 보수용 모르타르의 재료특성

Shin, Seung-Bong;Kim, Gyu-Yong;Nam, Jeong-Soo;Shin, Kyoung-Su;Lee, Bo-Kyeong
신승봉;김규용;남정수;신경수;이보경

  • Received : 2019.03.05
  • Accepted : 2019.06.07
  • Published : 2019.08.20

Abstract

In general, repair mortar is used to rehabilitate underground communities, but difficulties are encountered in the execution of long-term construction due to spatial co-operatives. In this study, the engineering properties of repair mortar according to the curing condition and accelerator type were reviewed. The results showed that the aluminate, alkali-free and calcium-aluminate precipitates in the water curing conditions showed higher compressive strength at the beginning of age than mortar specimens under air curing conditions, and increased. Especially in CA and AF test specimen with cement mineral quick setting, a large amount of ettringite products were observed compared with AL, thus reducing the pore volume and increasing the strength of the compound by micro-filling effect were found.

Keywords

accelerator;compressive strength;repair mortar;curing conditions

Acknowledgement

Supported by : Ministry of Science and ICT(MSIT)