Effect of glass powder and silica fume on mechanical properties and on alkali-silica reaction of recycled glass mortars

Zineb Douaissia,Mouloud Merzoud,Amar Benazzouk,M El Ganaoui,R Bennacer,E Sediki,K Ragui

doi:10.1051/matecconf/202033001050

Zineb Douaissia, Mouloud Merzoud + Show 5 more

Open Access

https://doi.org/10.1051/matecconf/202033001050

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Abstract

In order to value glass in the production of cement and concrete. We have verified the effect of the progressive substitution of 10% to 50% of the volume of cement by glass powder and silica fume on the mechanical properties of hardened mortars, we have also verified their inhibitory effect of the Alkali Silica Reaction (ASR) by studying the variation of mass, expansion, opening and density of cracks as well as the loss of mechanical performance of mortars undergoes a test that accelerates the ASR by autoclave. We have concluded that the use of these mineral admixtures can improve the mechanical performance of mortars, and it can reduce expansions and mechanical performance losses due to ASR.

Highlights

A more pressing requirement to find an alternative to cement has been made in recent years, the focus is on the use of industrial waste such as glass
The mortars were made with a replacement of 10% to 50% cement volume by one of the mineral admixtures, The composition of the mixtures is summarized in Table 2, we spoiled two mixtures, the first was without adding NaOH, it was intended for the determination of the mechanical characteristics, the second was enriched by adding NaOH in the mixing water to obtain 4% Na2O intended to verify the inhibitory effect of the alkali-silica reaction
Influence of the mineral admixtures according to the different cement substitution rates on the expansions of the mortars due to the alkali-silica reaction (ASR) is presented by the Fig

Summary

Introduction

A more pressing requirement to find an alternative to cement has been made in recent years, the focus is on the use of industrial waste such as glass. The partial replacement of the natural granulate or the cement by the glass in the concretes, improves its mechanical properties in particular the compression strengths.

Results

Conclusion