Development and Characterization of Stabilized Earth Blocks Based on Recycled Sediment and Lightweight Aggregates

The main objective of this experimental study is the development of eco-materials based on recycled material by recovery of dam sediment, and the incorporation of lightweight aggregates in order to improve the physical, mechanical and thermal properties of the stabilized earth blocks (SEB) used in construction. The development of stabilized earth blocks is carried out using different amounts of stabilizers (cement, lime) and different dosages of lightweight aggregates in substitution of dam sediment (10, 20, 40 and 50%). An experimental campaign was directed to test the physical, mechanical and thermal characteristics of the blocks produced. The obtained results show that the blocks made from 50% lightweight aggregates and 10% stabilizer (cement) have the best performances. Adding lightweight aggregates to the block composition improves shrinkage. Using a higher percentage of lightweight aggregates and combined to a fixed quantity of binder leads to better stability of the earth blocks by reducing weight loss and increasing durability.