Earth materials have been used in the form of adobe or rammed products for the construction of load-bearing walls in buildings. In Portugal, the adobe has been used predominantly on the central coast, particularly in the Aveiro district. Although many old adobe buildings in Aveiro have been abandoned, some of them can be refurbished with minor maintenance and repair works.

Representative samples from typical adobe blocks, from various constructions in the region were collected and characterized for their mineralogical composition, particle size, aggregate content, water uptake, durability and strength. These basic properties provide a basis for the development of adequate interventions, preserving the characteristics of the buildings. This study compares the main characteristics of adobes from two different locations (Anadia and Murtosa). The most important differences between the two groups of adobes are the particle size distribution, the mineralogical composition, the water absorption and the mechanical and durability properties. The study improved the knowledge of the traditional construction methods and will enable decisions for rehabilitation of adobe buildings to be made. Knowledge of the main characteristics of adobes allows those participating in the rehabilitation process to obtain the basis for the rehabilitation and conservation of old buildings.

Excavations at Kouphovouno (Laconia, Greece) have revealed burnt deposits associated with firing structures. The ‘millefeuille’ (vanilla slice) observed was composed of alternating layers of burnt red aggregates and white carbonate. Their description, micromorphological study, and contrast with a more standard structure of the Middle Neolithic allow us to interpret the layers as belonging to a structure for firing pottery: a covered clamp. This study has clarified its method of construction, operation, and use within a domestic context. After heating and cooking, the production of pottery and lime was one of the pyrotechnological activities most consumptive of energy among Neolithic communities, yet direct evidence for firing installations has been elusive. A new approach to the problem of locating pottery firing sites is presented here. The firing of pottery seems the most likely use for this type of structure, though the production of lime is also discussed.