Understanding Cinder Blocks: Versatile and Durable Construction Materials Cinder blocks , also known as concrete masonry units (CMUs), are essential building materials used in a wide range of construction projects. These rectangular blocks, typically made from cement, water, and aggregates like sand, gravel, or coal cinders, offer a durable and cost-effective solution for building strong structures. Composition and Types Originally, cinder blocks were made using coal cinders, giving them their name. However, modern cinder blocks are made with more common aggregates such as sand and gravel. They are usually hollow, making them lighter and easier to handle compared to solid concrete blocks. There are also solid cinder blocks, which offer greater strength but are less commonly used. Standard Sizes The most common size for a cinder block is 16 inches long, 8 inches tall, and 8 inches deep (16" x 8" x 8"), though various sizes and shapes are available depending on the sp...