Abstract
This article describes an experimental study aimed at investigating the potential use of recycled rubber granulate from waste tires of fractions 0/1 and 1/3 mm in cement composites as a 100% replacement for natural aggregates. The use of waste in the development and production of new building materials represents an important aspect for the sustainability and protection of the environment. This article is focused on the sound-absorbing and thermal-insulating properties of experimental cement composites based on recycled rubber from waste tires. The article describes the grain characteristics of recycled rubber, sound absorption capacity, thermal conductivity and strength characteristics. The results of this research show that the total replacement of natural aggregate with recycled rubber in cement composites is possible. Replacing natural aggregate with recycled rubber has significantly improved the thermal and acoustic properties of the prepared cement composites, however, at the same time; there was also the expected decrease in the strength characteristics due to the elasticity of rubber.
Highlights
The use of waste in the development and production of new materials is an important aspect for the sustainability and protection of the environment
Lightening of the concrete mixture was achieved by replacing aggregate with rubber granulate from waste tires in cement composites, which places this mixture in the category of lightweight concrete class LC 1.4 according to CSN EN 206-1 [50]
Cement composites containing recycled rubber from waste tires show better sound insulation properties at a layer thickness of 10 mm—at frequencies of 125 and 2000 Hz, at a sample thickness of 30 mm—at frequencies of 125, 500 and 2000 Hz, and at a sample thickness of 50 mm—at frequencies of 125, 500 and 2000 Hz when compared to the comparative sample containing natural aggregate
Summary
The use of waste in the development and production of new materials is an important aspect for the sustainability and protection of the environment. Recycling and utilization of waste materials in building industry has recently been the goal of many research teams and manufacturers of building materials. Their objective is to reduce the consumption of primary minerals [1,2,3,4]. Especially concrete construction material called eco-concrete, are more and more frequently used in building industry, reducing the human ecological footprint on Earth. Eco-concrete is concrete in which the binder or filler is replaced by a waste material. Many research teams are already working on the incorporation of waste products into building materials and the subsequent study of their properties. With respect to its non-uniform quality, the use of RCA can have a negative effect on the durability of
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