What are Compressed Earth Blocks?

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Compressed Earth Blocks are innovative, natural, and sustainable construction material. Whereas most vernacular, earthen building techniques are artisanal in nature, these blocks are a manufactured construction material that radically increases the strength, performance, and durability of traditional earthen structures. The compressed earthen blocks combine on-site soils, non-expansive clays, and aggregate (usually lime or Portland cement) to stabilize. The proportion of soil and clay is dependent on the type of dirt that can be found on-site, but a mixture of 75 percent sandy soil and 25 percent of clay soil is ideal, as it will reduce shrinkage that can lead to cracking. A percentage of 4 to 8 percent of Portland cement is added to stabilize the mix, aid in the drying process, and offer moisture resistance.