Strength Performance on Different Mix of Cement-Sand Ratio and Sand Condition for Lightweight Foamed Concrete Yee Ling Lee 1* , Cher Siang Tan 2 , Siong Kang Lim 1 , Shahrin Mohammad 2 and Jee Hock Lim 1 1 Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000 Kajang, Selangor, Malaysia 2 School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), 81310 UTM Johor Bahru, Johor, Malaysia. Abstract. Proper cement-sand ratio and water content can provide excellent consistency and stability for lightweight foamed concrete. The aims of this study are to investigate the comprehensive optimisation design mix of lightweight foamed concrete with different cement-sand ratio and the effect of sand size and admixture towards the consistency and stability of the design mix. Silica fume as admixture was used to verify the improvements in the strength of the foamed concrete. Two types of foamed concrete were prepared, namely SC with sieved sand and UC with unsieved sand used in foamed concrete. Three different cement-sand ratios with different water content were tested for the above two types of foamed concrete for their compressive strength, consistency and stability. The results indicate that foamed concrete using sieved sand gained better consistency and stability. In addition, using silica fume in foamed concrete significantly improved the compressive strength with the highest strength at 27.12 MPa with 1700 kg/m 3 density. 1 Introduction The conventional normal weight of concrete with a density ranging of 2000 to 2600 kg/m 3 and strength ranging from 20-60 MPa are well established and is disadvantageous due to its heavy weight. In order to reduce the dead load or the weight of the building, lightweight concrete is introduced to the construction industry. The demand of lightweight concrete in many construction applications has been steadily increasing due to its advantages; lower density and a reducing the size of building foundation [1]. Lightweight foamed concrete (LFC) is a type of cellular concrete produced by the foaming mixture method. Stable voids, which the microscopic air-void was approximately 0.1 to 1.0 mm, are introduced into the cement paste [2]. LFC had a least of 20% volume of entrained foam in the cement paste [3]. LFC have the advantages, such as low density, high flowability and self-compacting, good in thermal and sound insulation made it popular in * Corresponding author: [email protected] © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/). E3S Web of Conferences 65, 02006 (2018) https://doi.org/10.1051/e3sconf/20186502006 ICCEE 2018
Strength Performance on Different Mix of Cement-Sand Ratio and Sand Condition for Lightweight Foamed Concrete
May 10, 2023
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