Conceptualisation and pilot study of shelled compressed earth block for sustainable housing in Nigeria

Meeting the housing needs in Nigeria is a long-standing task, yet to be realised. The economy of the country, as most developing countries, is ailing with limited resources. Energy and infrastructures are inadequate, yet the use of cement dominated the construction industry. Earth construction is a sustainable option to housing with inherent characteristics that should be desirable in the ailing economy of hot tropical environment in Africa. However, most Nigerians are skeptical of taking a low cost option with less modern effects and uncertain durability. This research explores the issues relating to this problem and aims to bridge the gap between Nigerians and earth, which exists in abundance in Africa. The emerging concept from the survey of public reaction to earth construction in Nigeria is of a shelled compressed earth block (SCEB) of an inner core of ‘earth’ with less stabilisation and an outer shell of the same earth composition but with higher ratio of cement stabilisation for adequate durability, compressed into a single piece. A mechanical kit was designed and fabricated for the production of sample shelled compressed earth block for laboratory tests. Basic preliminary tests were conducted on the model and results revealed that the concept was feasible thus paved the way for further research work in shelled compressed earth block (SCEB).