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Information @ a Glance

General

  • A concrete masonry unit (CMU) [US], concrete block, cement block or foundation block [US] is a large rectangular brick used in construction.

  • A concrete block is one of several precast concrete products used in construction.

  • Hollow concrete blocks are substitutes for conventional bricks and stones in building construction.

  • Split-face concrete blocks or concrete masonry units (CMUs) are a special class of decorative or architectural block that has a rough, stone-like texture created by splitting a block during production.

Manufacturing

  • The production of concrete blocks consists of four basic processes: mixing, molding, curing, and cubing.

  • Aerated autoclaved concrete (AAC) is manufactured by combining sand, lime, cement, and water plus an expansion agent that reacts with the other ingredients to form the porous microstructure in the concrete.

  • The manufacture of concrete blocks requires constant monitoring to produce blocks that have the required properties.

  • The color additives with the longest history of proven performance in concrete products are made from oxidized metals.

  • The crumb rubber was used as aggregate in the manufacturing of concrete block.

Applications

  • Veneer wall concrete blocks are heavy weight, hardly capillary and have a moderate to low air and vapour permeance.

  • Articulated Concrete Blocks has been utilized for Overtopping Protection.

  • Concrete blocks and iron structures of different design, size and weight are used for the construction of artificial reefs.

  • Concrete block walls are commonly used to separate dwelling units from each other and to enclose mechanical equipment rooms in both residential and office buildings because of their inherent mass and stiffness.

Technology

  • Concrete block paving technology supports the use of pavers in engineering pavements.

  • Geodetic and non-geodeticlight technique used to detect the deformation of a weight concrete block which undergoes load testing.

  • Infrared (IR) scanning technique used to evaluate the bond between FRP composites and concrete.

  • Two novel techniques of remediating concrete and wood contaminated with organic compounds were developed and tested.

Market

  • A typical price increase will be around 30 pence per square metre for solid dense concrete blocks. However, the block industry offers a number of products that will help to reduce the impact of the levy on the customer, such as cellular and lightweight blocks.

  • The construction industry and the masonry segment remain strong influences on the U.S. economy.

  • Typically, the cost of raw materials in concrete is about 60-70 percent cement and 30-40 percent aggregates and water. Labor and equipment cost is also significant, averaging approximately 25 percent of the total concrete cost

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