Green Lightweight Concrete Made from Natural Para Rubber Product

Abstract:

Para Rubber Seed Shell (PRSS) as a coarse aggregate and coated by vulcanization and mixing epoxy natural rubber (ENR) was investigated. Natural rubber latex (60% DRC) was applied in two stages. Firstly stage, synthetic natural latex (ENR-35) solution was coated on the first layer of PRSS. After that, PRSS was coated by vulcanization in second layer. Then, pre-wetting was performed before mixing or casting the concrete for 5 days. Finally, CPRSS (Coated Para Rubber Seed Shell) was produced. The CPRSS aggregate was cast as self consolidation concrete (SCC) with different ratios of ordinary Portland cement: sand: CPRSS for 0.8-1: 0.6-0.85: 0.04-0.12 by weight, respectively and constant water/binder ratio at 0.45 throughtout this study. The ENR-35 was also used about 5% of the water content. However, the concrete was wrapped with polyvinyl sheet to prevent moisture loss during setting and curing in ambient temperature (29°C, 84%RH) for 28 days. The fresh concrete to slump test, harden concrete with bulk density and compressive strength of whole formulations was carried out to determine. The test result A8 indicted that the most ingredient suitable mixture of SCC involed cement: sand: CPRSS of 1:0.94:0.046. The SCC contained the slump as 120 mm, bulk density about 1916 kg/m³ and compressive strength was 37 MPa. Its was met specification of structural lightweight concrete. This beneficiation of SCC is also product as the green innovation building in terms of construction materials and resources, leaving minimal environmental impact, and having energy saving and eco-friendly materials.

• Periodical: Key Engineering Materials (Volumes 594-595)
• Pages: 460-464
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.594-595.460
• Online since: December 2013
• Authors: Duangden Raksritong, Danupon Tonnayopas, Wirach Taweepreda, Manoon Masniyom
• Keywords: Green Technology, Lightweight Concrete, Natural Para Rubber, Para Rubber Seed Shall Aggregate

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