In Vitro Evaluation of the Effect of SP200 Lubricant on Compressive Strength of Lightweight Concrete with Leca Aggregate and Powdered Silica

Document Type: Original Article

Authors

1 Building Materials Institute, Apadana Institute of Higher Education, Shiraz, Iran.

2 Department of Civil Engineering, Eghlid Branch, Islamic Azad University, Shiraz, Iran.

10.22034/jcema.2020.102699

Abstract

In today's advanced world and due to advances in various scientific fields of the concrete, industry has also evolved, and light concrete production is a result of these advances. It has had its advantages, many efforts have been made in the past to improve the quality and efficiency of concrete, and today the use of additives helps us to achieve this goal. The additive in this study is lubricant based on polycarboxylate brand SP200 and Powdered silica. The use of silica is also widely used in advanced countries due to its pozzolanic properties. In this study of 20 mixing designs, 2 of which were used as control sample and 18 with SP200 super-lubricant and micro silica powder, the results show that in the first mixing design with 0.49 water/cement ratio the highest compressive strength of The 7 and 28 days is related to M / 35/5 sample which has 0.35% super-lubricant and 5% micro silica powder And in the second mixing scheme with water/cement ratio of 0.55, the highest compressive strength is related to the sample of  M /35/10 It contains 0.35% super-lubricant and 10% Powdered silica.  The use of silica and super-lubricant in the manufacture of lightweight concrete has increased the compressive strength of lightweight concrete in some of the samples.

Keywords


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