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The objective of this research is to evaluate the influence of mineral additions on the mechanical performances of polymer concrete. This study aims to propose a novel approach formulation of polymer concrete based on reduction in the quantity of the binder and disposal of large quantities of industrial by-products and household waste such as the marble, the brick and silica fume whose valuation in polymer concrete could be an interesting ecological and economical alternative. The incorporation of a rate of 10% brick powder affects the distribution of pores inside polymer concrete, that is, the pore diameters become thinner and decrease and the porosity becomes evenly distributed. The recycled mineral brick powder addition in polymer concrete mix improved the mechanical properties.

This polymer concrete was prepared by using polyester resin and two different types of sand, following a new formulation based on an empirical method. Furthermore, the optimal binder percentage was of 20% resin and a mixture of 52% dune sand and 48% quarry sand according to the Abrams method. To achieve our objective, five rates (from 2% to 10%) of brick powder, marble powder and silica fume were examined. Afterwards, its mechanical characteristics were evaluated via a three-point flexural with compressive resistance. The findings indicated that the addition of brick, marble and silica fume to polymer concrete increases the flexural strength with 21.84%, 12.76% and 9.07%, respectively.

Concerning the compressive strength, the best resistance is that of polymer concretes based on brick powder, and this economic formulation of polymer concrete serves the optimal cost/resistance ratio criteria. It allows an improvement in the mechanical resistance of concrete are obtained by adding brick powder that exceed that of the reference concrete.

In the past few decades, there has been several contribution concerning the subject of the reduction of the binder quantity in polymer concretes and adding the industrial and household wastes. However, previous studies revolving around the same area disregarded the effect of the brick powder, which appears scientifically of great importance for enriching the literature.

Following recent terrorist attacks in the US and Europe, Western Muslims have been criticised for not taking a firm stand against radical Islam and extremist organisations. Drawing on insights from narrative criminology, we challenge such assertions and reveal Muslims' narrative mobilisation against violent jihadism. Based on 90 qualitative interviews with young Muslims in Norway, we show how violent extremism is rejected in a multitude of ways. This narrative resistance includes criticising extremist jihadist organisations for false interpretations of Islam and using derogatory terms to describe them. It also includes less obvious forms of narrative resistance, such as humour and attempts to silence jihadist organisations by ignoring them. While narrative criminology has effectively analysed the stories that constitute harm, less attention has been paid to narratives that counter harm. We argue that stories that counter jihadi narratives are crucial to understand the narrative struggles of Muslim communities, whose outcomes can help determine why some individuals end up becoming religious extremists – while others do not. By distinguishing between factual, emotional and humorous counternarratives and describing silence as a form of resistance, we show resistance to extremism that is often concealed from the public and the state.