AN INVESTIGATION INTO THE STRENGTH, DURABILITY AND COST PROPERTIES OF INTERLOCKING SOIL STABILIZED BLOCKS (ISSBs)

ABSTRACT

The interlocking soil stabilized block technology has in the recent past been gaining momentum in the East African community, mostly in Uganda and Tanzania.

 

This project was aimed at investigating on the strength and durability properties of the straight rectangular double interlocking stabilized soil block. Apart from these two properties, this research project also aimed at looking into the cost of building using interlocking soil stabilized blocks as opposed to the conventional construction methods.

 

The results obtained in this research indicated that the ISSB has a 28 day compressive strength of about 2.0N/mm2 at 12% cement stabilization. The recommended strength at 28 days is 2.5N/mm2. The durability tests indicated that the ISSB absorbs about 4.9% of water at 28 days (at 12% cement stabilization) therefore meeting the limit which is set at 15%. The abrasion test gives an abrasion of 1.785% of material abraded at 28 days with 12% stabilization. A cost analysis indicated that the ISSB technology is way cheaper than the conventional block technology.

 

The recommendations given in order to improve the use of this technology are more government involvement, standardization of the ISSB building and testing methods and the inclusion of the ISSB technology in education curricula.

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