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Materials 2014, 7(6), 4536-4554; doi:10.3390/ma7064536

Fundamental Study on the Development of Structural Lightweight Concrete by Using Normal Coarse Aggregate and Foaming Agent

1
Department of Architectural Engineering, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 426-791, Korea
2
Center, Sungshin Cement, 48-37 Bugang Oecheon-ro, Bugang-Myun 339-940, Korea
*
Author to whom correspondence should be addressed.
Received: 6 May 2014 / Revised: 3 June 2014 / Accepted: 3 June 2014 / Published: 13 June 2014
(This article belongs to the Section Porous Materials)

Abstract

Structural lightweight concrete (SLWC) has superior properties that allow the optimization of super tall structure systems for the process of design. Because of the limited supply of lightweight aggregates in Korea, the development of structural lightweight concrete without lightweight aggregates is needed. The physical and mechanical properties of specimens that were cast using normal coarse aggregates and different mixing ratios of foaming agent to evaluate the possibility of creating structural lightweight concrete were investigated. The results show that the density of SLWC decreases as the dosage of foaming agent increases up to a dosage of 0.6%, as observed by SEM. It was also observed that the foaming agent induced well separated pores, and that the size of the pores ranged from 50 to 100 μm. Based on the porosity of concrete specimens with foaming agent, compressive strength values of structural lightweight foam concrete (SLWFC) were obtained. It was also found that the estimated values from proposed equations for compressive strength and modulus of elasticity of SLWFC, and values obtained by actual measurements were in good agreement. Thus, this study confirms that new structural lightweight concrete using normal coarse aggregates and foaming agent can be developed successfully. View Full-Text
Keywords: microporous materials; mechanical testing; mechanical properties; elastic properties; microstructure microporous materials; mechanical testing; mechanical properties; elastic properties; microstructure
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Lee, H.-S.; Ismail, M.A.; Woo, Y.-J.; Min, T.-B.; Choi, H.-K. Fundamental Study on the Development of Structural Lightweight Concrete by Using Normal Coarse Aggregate and Foaming Agent. Materials 2014, 7, 4536-4554.

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