A research project which is a technological development to reconstitute limestone waste and turn it into a suitable building material. Over ten years of research performed by the Associate Professor within the Faculty for the Built Environment, Prof. Spiridione Buhagiar and architect Franco Montesin in collaboration with Halman Vella Ltd.

The process includes the gathering of waste limestone, building blocks or excavated waste and crushing and grading of the waste limestone. Furthermore, waste mass is turned into an appropriate graded powder which is then converted into paste that can be moulded. The result, is a hard, dense limstone material, similar to that of the natural limestone which is suitable for water resistance and weathering.

Up to today no other solution is present for recycling waste into revenue-generating recycled building materials. However, through this process we can aim to reduce Malta’s biggest generation of waste. Apart from offering a solution to the construction industry which are faced by a limited resource such as the globigerina limestone.

The first room using RE-STONE materials was constructed near the Ta’ Qali Crafts Village from crushed quarry waste in October of 2021.