PAVING BLOCKS FOR THE ELDERLY: A STUDY OF THE PREPARATION OF CONCRETE MIXED WITH CRUMB RUBBER AND BONDED RUBBER

Authors

  • Chaiwute Vudjung Lecturer, Department of Chemistry, Faculty of Science, Ubon Ratchathani University, 85 Sathonlamark Road, Muang Srikai Subdistrict, Warin Chamrap District, Ubon Ratchathani Province 34190
  • Suwimon Thiakthum Lecturer, Department of Production Engineering and Management, Faculty of Agricultural and Industrial Technology, Phetchabun Rajabhat University, 83 Moo 11, Saraburi-Lom Sak Road, Sadiang Subdistrict, Mueang District, Phetchabun Province 67000

Keywords:

Crumb rubber, Shock-reducing paving blocks, Portland cement, Fly ash

Abstract

This research aimed to study the preparation of shock-reducing paving blocks. Typically, the paving blocks are made of concrete mixed with three different materials, namely crumb rubber, bonded rubber, and shock-absorbing rubber. This research focused on studying the effects of crumb rubber on the characteristics of concrete and the impact of fly ash content on the properties of bonded rubber. The tests showed that concrete had less density and compressive strength when the crumb rubber content increased. The concrete with 10% crumb rubber content by sand weight had the highest compressive strength (156.32 kg/cm2). The vulcanization test of bonded rubber using fly ash as a filler revealed that MH-ML increased when the fly ash content increased. However, the scorch time (TS2) and cure time (TC90) of the rubber were somewhat stable. The mechanical properties test of bonded rubber found that tensile strength, elongation at break, and rebound resilience tended to decrease; on the other hand, the hardness appeared to increase when the fly ash content became greater. However, the bonded rubber with fly ash as a filler could not be chemically bonded with the concrete mixed with crumb rubber. Consequently, it is advisable to design the characteristics of bonded rubber to be physically adhesive to concrete mixed with crumb rubber.

References

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Published

2021-12-24

Issue

Vol. 11 No. 3 (2021): September-December 2564

Section

บทความวิจัย (Research Article)

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