Valorization of glass and shell powders in the synthesis of Belitic clinker

A Bouregba,O Sassi,F Amor,H Ez-Zaki,A Diouri,A Nounah,J Aride,L Ait Brahim,M Saadi,A Boukhari,L Bahi,N Khachani

doi:10.1051/matecconf/201814901021

Abstract

In recent years, waste recycling has become a key issue in construction materials science for achieve the goal of sources of raw materials. The aim of this study is to use waste glass as source of SiO2 oxide and mussel shells consisting essentially of calcium carbonate as starting materials to synthesize belite rich cement. The elaborated clinker is chemically and structurally related to β-Ca2SiO4, by heat solid state activation. After grinding, the raw materials are mixed and heated up to 1050°C. The samples are characterized by X-ray diffraction (XRD) and Fourier Transformed Infrared spectroscopy (FT-IR). The mechanical strength of some sample was measured for 28 and 72 days. The results show the different mineralogical stapes of formation of clinker, the state reaction method allows the elaboration of a cementitious material by a simple heat treatment at relatively low temperature and low release of CO2. The hydration products are also identified by XR diffraction at 2, 7, 28 and 72 days.

Highlights

A large amount of coast shell is being picked up around all the costs sea and oceans of the world, many factories produce a high amount of waste glass
Many researchers prove the benefit derived from reusing various waste materials, such as, fly ash [1], paper sludge ash [2], clay aggregate [3], tire crumb [4], siliceous and aluminous materials, as well as some natural pozzolanic materials [5] in the production of cement clinkers, and it has been proposed that these wastes have high potential for being alternative raw materials [6]
The use of by-products or residues generated from other activities seems to be a good approach to solve both economic and environmental problems related to cement production [7]

Summary

Introduction

A large amount of coast shell is being picked up around all the costs sea and oceans of the world, many factories produce a high amount of waste glass These wastes become a serious environmental problem. Waste glass can be utilized in the elaboration of cement and concrete [11], can impact cement hydration [12], and can be used to improve and enhancing durability of mortar [5] and to reduce and minimize cement content in rendering of mortar [13] These studies proved that the use of coast shell and waste glass in cement can improve the mechanical properties and durability of elaborated cements by beneficially influencing the material microstructure

Objectives

Methods

Results

Conclusion