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Producing ecological bricks—also known as soil-cement bricks—requires a precise mix of soil, cement, and water tailored to the specific composition of local earth.0:16 Because soil properties vary by location, builders must perform a granulometry test to determine the percentage of sand and organic matter before production.5:04 A mixture typically requires approximately 70% sand for optimal structural integrity.5:43 If the soil is too clay-heavy, adding sand prevents cracking; if it is too sandy, adding lime or additional clay improves binding.5:39 The production process involves mixing materials in a concrete mixer, processing the blend through a crusher to remove clumps, and shaping the bricks in a manual press.11:05 Freshly pressed bricks require a seven-day curing period, which involves saturating them in water and covering them to ensure slow evaporation.14:39 Beyond material savings, these bricks provide thermal and acoustic insulation and eliminate the need for traditional plastering or finishing.1:28 Testing samples at a laboratory, such as through SENAI, ensures the bricks meet ABNT standards for structural use.16:58

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