Speaker
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Abstract
Construction and demolition waste is composed of concrete, mortar, bricks, ceramics, metal and glasses. Glasses are produced at higher temperature of 1500 oC. In 2018, 130 mililion tons of glass wastes were generated worldwide. The glass recycling can reduce the CO2 emission by up to 37%. The recycling of waste glass and metal powder into new materials is environmentally beneficial because in the primary production of materials use significant amounts of raw materials and energy. Glasses are considered sources of silica in alternative cements and in the production of geopolymeric materials as tiles by alkaline activation. Up new, the scientific research in the field of the recycling of construction and demolition waste was focused on the production of concrete, cements and bricks. The obtaining of these products was limited to the addition of suitable binder contents such as lime or cement, compaction and possibly heat treatment, without to be a concrete recycling method. In this paper silicate composites were prepared by a wet chemical synthesis method for specific technological applications using as raw materials crushed glasses, construction and demolition waste powders. The prepared samples were characterized by: X-ray diffraction (XRD) analysis, Infrared (IR) and Nuclear Magnetic Resonance (NMR) spectroscopy and Vickers hardness measurements. The mechanical properties of the composite – mortar materials were also studied.
| Scientific Sections | Recycling |
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