Constructive features and preservation work of rammed earth architecture: the Islamic tower of Bofilla (Valencia)

Abstract

[EN] The Bofilla tower (Valencia, Spain), at 800 years old one of the oldest buildings still standing in the whole region, is a rubble-reinforced rammed earth construction almost 20 m high. Its precarious condition called for preservation works and the enhancement of the surrounding archaeological site. However, these works involved a serious risk that the original construction might lose its hallmarks and its history, which had great narrative potential, due to the plasticity of the earth. Furthermore, as often happens, a great deal of the character and antiquity of the tower were linked to the erosion and abrasion of its rammed earth surfaces, so it was necessary for the preservation to try to alleviate or stop the degradation that threatened the tower's survival and, at the same time, conserve its narrative potential, its aura and its ancestral character. After performing a comprehensive preliminary study of the construction and its state of repair, a large number of preservation tasks were carried out, from cleaning the facades by hand to reconstructing the structure of the tower in several spots, such as the south-western corner and, especially, the entrance in the northern facade, which was on the verge of collapse. Other operations included filling in the lacunae in the fabric both inside and outside the tower, micro-pointing the rubble filling in the most degraded areas of the southern facade and protecting and consolidating the crowning. In addition, new floors and a staircase leading up to the top of the tower were inserted in the places where their traces were still visible to avoid damaging the fabrics and to perform the most faithful archaeological reconstruction possible. The article addresses the study, reflections and technical operations carried out on the tower during the works on site, with the objective of maintaining the original materiality of the rammed earth fabric and the traces of its construction and life as a testimony of its history.