PCE-type copolymers in powder form can be obtained by spry-drying and are easily re-dispersed in water. The fineness and the anti-caking properties of said PCE-type copolymers in powder form, as well as their water reduction potential and influence on slump life are improved. A production process of said PCE-type copolymers in powder form is by a spray-drying method, and PCE-type copolymers can be used for the improvement of mineral binder compositions and especially dry mortars.

A method for recycling concrete waste from construction and/or deconstruction, including at least one step of microwave processing of concrete blocks, at least one step of mechanical processing, and at least one step of carbonation of recycled concrete aggregates and/or recycled concrete fines; and a recycling installation for carrying out the recycling method and to recycled concrete aggregates obtained by the steps of microwave processing of concrete blocks and mechanical processing.

A concrete masonry unit, comprising a solid portion comprising cement, coarse aggregate, fine aggregate, and 10 percent to 25 percent of microbeads with respect to a total volume of the solid portion; and at least one hollow portion boring through the solid portion; and wherein the concrete masonry unit meets the requirements under standards ASTM C90 as measured according to ASTM C140.

A composite material for manufacturing an insulation brick comprising a filler obtained from recycled fiberglass and a silicate base binder, the filler being a fiberglass powder with particle size lower than 500 m.