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To save the environment we need to recycle. In order to save natural resources we must recycle glass products. These recycled glass products are crushed and the necessary sorts are created, namely 0/4 mm and 4/8 mm, which we can partially replace from the aggregates of ballast or quarry needed to make concrete pavers. A study has been made on the mechanical strength of the pavers. The study consisted of making concrete paving stones, as well as making recipes with crushed and sorted recycled glass. The same tests were carried out to verify the products.In this paper we will present in parallel both the results on classic pavers and the results on recycled glass pavers, the so-called "firefly" concrete. The tests show that recycled materials can be used successfully but in well-defined proportions. These quantities of recycled materials are determined by physical and mechanical testing of the finished product.

The current study reveals a method of cinematic calculus of a manipulator, whose geometry has been created according to the model of a plant. The calculus method has been experimentally checked on a scale model.

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In this paper some sandwich bars made from classical materials (polystyrene core, glass fiber) but combined in order to obtain an original material, are made. For these new sandwich bars, some dynamic parameters are studied, such as: damping factors per unit mass and length, eigen frequency.