ABSTRACT
The selection and design of a material is quite similar to the design of a structure or any other product. Both are more-or-less iterative processes in which an acceptable design is obtained starting from some theoretical basis then by successive trial and verifi cation. This should reach a well-defi ned aim: all design parameters should be specifi ed to enable execution in an unambiguous way. The fi nal result should satisfy all imposed conditions during exploitation as to the strength, durability and aspect of the material. Additionally, the fi nal product should correspond to the conditions of execution and of economy and ecology during its service life, including its construction, demolition and possible reuse.
