Development and Performance Assessment of the High-Performance Shrinkage Reducing Agent for ConcreteReport as inadecuate




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Advances in Materials Science and Engineering - Volume 2016 2016, Article ID 9318086, 8 pages -

Research Article

RandD Center, Dongnam Co., Ltd., Gyeonggi-do, Republic of Korea

Department of Civil Engineering, Kyungnam University, Changwon, Republic of Korea

Advanced Construction Materials Testing Center, Keimyung University, Daegu, Republic of Korea

Received 27 April 2016; Revised 20 July 2016; Accepted 15 August 2016

Academic Editor: Hossein Moayedi

Copyright © 2016 Hyung Sub Han et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

To develop a high-performance shrinkage reducing agent, this study investigated several shrinkage reducing materials and supplements for those materials. Fluidity and air content were satisfactory for the various shrinkage reducing materials. The decrease in viscosity was the lowest for glycol-based materials. The decrease in drying shrinkage was most prominent for mixtures containing glycol-based materials. In particular, mixtures containing G2 achieved a 40% decrease in the amount of drying shrinkage. Most shrinkage reducing materials had weaker level of compressive strength than that of the plain mixture. When 3% triethanolamine was used for early strength improvement, the strength was enhanced by 158% compared to that of the plain mixture on day 1; enhancement values were 135% on day 7 and 113% on day 28. To assess the performance of the developed high-performance shrinkage reducing agent and to determine the optimal amount, 2.0% shrinkage reducing agent was set as 40% of the value of the plain mixture. While the effect was more prominent at higher amounts, to prevent deterioration of the compressive strength and the other physical properties, the recommended amount is less than 2.0%.





Author: Hyung Sub Han, Jong Kyu Kim, and Yong Wook Jung

Source: https://www.hindawi.com/



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