Concrete blocks, retaining walls

Concrete and concrete blocks are materials commonly used for retaining walls. Concrete is composed of aggregate bonded with cement that hardens over time. Concrete blocks come in solid, hollow, and interlocking forms and can be lightweight, medium, or normal weight depending on their aggregate mix. Retaining walls made of concrete blocks are laid with mortar between each block to retain soil behind the wall. The base of the retaining wall is thickest to withstand pressure, while the top is thinner, and reinforcement is often added along the outer surfaces to support heavy loads exerted on the wall.Read less