Gesteuerte Erosion : Strategien des Umgangs mit Verwitterung bei Stampflehm-Mauerwerk

  • Steered erosion : Strategies of dealing with weathering in rammed earth masonry

Hoppe, Philipp; Schneider, Hartwig (Thesis advisor); Speidel, Manfred (Thesis advisor)

Aachen : RWTH Aachen University (2022)
Dissertation / PhD Thesis

Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2022


In the face of climate change and increasing waste accumulation, the building sector in particular has to rethink its consumption of resources. Building with raw earth - especially rammed earth - could show an alternative path, and serve as an example for sustainable, circular building. Rammed earth features an excellent environmental performance evaluation, since excavation material can often be used as a basis, and relatively little energy is needed in the production process. Futhermore, the material is usually fully recycable. Rammed earth also enables particularly "simple" construction, since it can can form both a bearing layer and outer skin. Stabilization of the water-soluble building material by means of lime or cement, as well as coatings such as plaster, can generally be dispensed with, since rammed earth is sufficiently resistant to driving rain. Through "Calculated Erosion" - the acceptance of a degree of weathering that is harmless to the durability of the wall - a a rammed earth façade is only gaining charisma over time. Thus, it contrasts with many modern building envelopes, whose often questionable aging leads to relatively short lifespans. In order to make rammed earth construction more widespread, further development of construction technology could as wellplay an important role. Particularly in rammed earth masonry construction, which has hardly been researched so far, great application potential is seen. In addition, the implementation of calculated erosion appears to be particularly suitable here, due to the new possibilities of production associated with elementization, but also special requirements of the construction method. This work hence addresses the question of how that implementation can be carried out. For this purpose, different strategies and means of intervening in the erosion process are investigated. Through the development of a typological order as well as exemplary application studies, finally an overview of different functional and design potentials is created. The core result of the work is the concept of "Steered Erosion". It describes the intervention in the erosion process as a possibility of adapting the degree of erosion protection to local requirements, as well as the use of the special design-related effectiveness of erosion.