Proceedings of the ICE - Construction Materials, 162(3): 105-112. Compressive strength of extruded unfired clay masonry units. Effect of the addition of coal-ash and cassava peels on the engineering properties of compressed earth blocks. Villamizar MC, Araque VS, Ríos Reyes CA, Silva RS. A Review on Interlocking Compressed Earth Blocks (ICEB) with Addition of Bacteria. Thermal performance assessment of masonry made of ICEB’s stabilised with alkali-activated fly ash.

University of Colorado at Boulder, ProQuest Dissertations Publishing. Strength Properties of Stabilized Compressed Earth Blocks with Varying Soil Compositions.

The process of producing the blocks includes steps of training the labour force (quality assurance is extremely important for ISSB production), excavation, sieving, mix preparation, mixing, measuring the mix, compressing the mix, removing the block, dry and stack, and quality check.Īllen GTR. It is important to refer to more detailed material to determine what stabilizer is most appropriate for the type of earth mix that is being used. Stabilizers include cement lime or bitumen, fibrous natural materials, chemicals and resins, or sands and gravels. Other tests include shrinkage tests, sending the soil to the laboratory, or using a portable soil-testing kit. A sedimentation test can be performed to determine the percentages of clay, silt, sand, and gravel in the soil.

Planning the production of ISSBs starts with the site and properties of the soil there. Depending on the machine, the following blocks can be produced: Straight Double Interlocking Block, Curved Double Interlocking Block, Wide Format Interlocking Block, Straight Single Interlocking Block, or Grooved Double Interlocking Block. Most ISSBs in East Africa are made with an ISSB machine that compresses the soil into the interlocking form. UN Habitat in collaboration with Good Earth Trust (GET) has a report specifically for ISSBs and presents similar information in a series of simple diagrams. Arup produced a report for compressed earth blocks in general that includes information for soil preparation, stabilizers, block dimensions, compression or extrusion, curing, block property testing, construction, finishing, and design parameters such as wall thickness, percentage of windows in a wall, and considerations when building in non-seismic and seismic areas.

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