Thermal Conductivity of Sand-Lime Products Modified with Foam Glass Granulate.

Iga Jasińska,Monika Jaworska-Wędzińska,Ryszard Dachowski

doi:10.3390/ma14195678

Abstract

Waste glass constitutes a significant part of general waste worldwide. Unfortunately, only a small percentage is recycled. It is, therefore, quite important that it can be applied in the production of construction materials. The main aim of this article is to determine the thermal conductivity of the products modified with granulated foam glass (GFG) (recycled product) of the 0.25–0.5 mm fraction, as well as to indicate dependence of the change in volume density of samples caused by the use of GFG and the change of the thermal conductivity coefficient compared to reference samples. For the purpose of this research, various parameters were examined i.a. volume density, water absorption, determination of the pore size distribution by mercury porosimetry and determination of the heat conduction coefficient with the use of a plate apparatus. The test results were developed on the basis of a mathematical model that determined the influence of the filler on the functional properties of the product. The research has shown that the use of GFG in the sand-lime products will contribute to lowering their thermal conductivity by more than 50% compared to traditional products.

Highlights

Waste glass constitutes a significant part of general waste, and its collection becomes a problem for almost every country
The results of the water absorption tests for the basic sand-lime samples and samples modified with granulated foam glass of 0.25–0.5 mm are presented in the diagram (Figure 2)
Filler are characterized by water absorption that increases significantly; The results apply only to samples modified with granulated foam glass (GFG) of a specific fraction, i.e., the dimensions of 0.25–0.5 mm

Summary

Introduction

Waste glass constitutes a significant part of general waste, and its collection becomes a problem for almost every country. Large amounts of waste glass are generated every year worldwide, only a small percentage is recycled. Environmental protection measures aimed at the sustainable use of resources as well as the problem of solid waste management provide a strong encouragement for their reuse, which is in line with the idea of sustainable economic development. The remaining 45.8% was disposed in landfills Taking this into account, there is no surprise that one of the goals of the EU is to reduce the amount of waste generated as well as to promote it as a resource in order to achieve higher recycling rates and safe disposal of waste [4]. The use of waste glass in building materials may minimize the costs of production and reduce the burden on landfills [5]. Given the above interest in using waste as alternative aggregates, its role should further explored in the area of building materials

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