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The use of recycled rubber particles from tires as concrete aggregate


Mix design and possible engineering applications

 


This study explores the effects of rubber particles on some properties of concrete. The rubber scraps are obtained from used tires from motor vehicles and trucks. They have long been investigated for resource reutilization as an aggregate in concrete resulting in the ‘Rubcrete mix’ which can be conveniently used in various applications with promising effects. Rubcrete provides a final product with good mechanical properties and also represents an effective and inexpensive way of recycling the discarded tires. The aim of this work is to present the results of an experimental investigation conducted to identify the optimal types and quantities of aggregates in concrete mixtures for engineering applications. Some of the examined characteristics include: density of rubber aggregates, workability, air entrapment and compressive strength. Three types of rubber particles (ash rubber, crumb rubber and tire chips) have been used in the rubberized concrete mixtures replac - ing partially or totally natural aggregates. Test results show that the rubcrete mix can be efficiently used for structural and non-structural civil and industrial applications, such as driveways, under-rail bearings and road construction. This is due to its low specific weight, good thermal and acoustic isolation properties and vibrational energy absorption capacity.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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