Cultured Stone
EZ Scaffold Corp.
EZG Manufacturing
Federated Insurance
Fraco USA, Inc.
Hydro Mobile, Inc.
Kennison Forest Products, Inc.
Mortar Net Solutions
Non-Stop Scaffolding
Norton Clipper
Southwest Scaffolding
The Belden Brick Company
Xtreme Manufacturing
Find-a-Contractor Masonry Buyer's Guide

Concrete Block

Types and Sizes

Concrete masonry units (CMU) are made from a combination of cementitious materials, aggregate, admixtures, and water. Materials are mixed at the block plant, placed into molds, and vibrated. Very dry mixes are used to permit rapid mold stripping. Concrete masonry units are cured at the block plant to ensure proper hydration of cementitious materials. CMU may include pigments for color variations or integral water repellents.

Concrete masonry units are manufactured in a wide range of sizes and configurations, to be used for masonry veneers and load bearing or reinforced masonry construction. Hollow units for reinforced masonry have a standardized length of 16 inches and a height of either 4 or 8 inches. Through-the-wall thicknesses are manufactured to be 4, 6, 8, 10, or 12 inches. Actual CMU sizes are slightly less than the listed nominal sizes to account for a 3/8” mortar joint thickness.

Colors, Surface Textures

A wide range of colors and surface textures are available for architectural variation. Colors range from the standard “cement gray” to white, from tan to red to dark brown and black. Most block manufacturers will mix a pigment into the concrete mix, creating a color consistent through the entire unit thickness.

Split-face or “rock-face” units are especially popular. Other surface finishes include smooth ground-face, ribbed units, and scored units.
Contact your local supplier for availability in your area.

ASTM Requirements for Concrete Block

ASTM contains a series of specifications for different concrete masonry units. Most common is ASTM C90, Standard Specification for Loadbearing Concrete Masonry Units, which contains requirements for strength, absorption, dimensions, and durability properties.

Concrete Block Tests

ASTM C140, Test Methods for Sampling and Testing Concrete Masonry Units, contains a series of test methods used to measure CMU strength, absorption, dimensions, and durability properties.

Specifying Concrete Block

Companies Offering Concrete Block

Company City State
MCAA Member Masonry Cosmetics, Inc. South Bend IN
MCAA Member Midwest Cast Stone, Inc. Kansas City KS
MCAA Member Best Block Kansas City MO
MCAA Member Bon Tool Company Gibsonia PA
MCAA Member Espinoza Stone, Inc. Jarrell TX
MCAA Member General Shale Brick Johnson City TN
MCAA Member Story-Rite Calumet MI
MCAA Member Superlite Block, Inc. Phoenix AZ
MCAA Member Amcor Masonry Products North Salt Lake UT
MCAA Member Ernest Maier, Inc. Bladensburg MD
MCAA Member Georgia Masonry Supply Lawrenceville GA
MCAA Member Mutual Materials Company Bellevue WA
MCAA Member Premier Masonry & Building Supply, LLC Martinsburg WV
MCAA Member York Building Products Co., Inc. York PA
MCAA Member Acme Brick Company Euless TX
MCAA Member Acme Brick Company St. Rose LA
MCAA Member Angelus Block Company, Inc. Sun Valley CA
MCAA Member Architectural Facades Unlimited Gilroy CA
MCAA Member Basalite Concrete Products, LLC Dixon CA
MCAA Member Belden Tri-State Building Materials New York NY
MCAA Member Block-Lite Co. Inc. Flagstaff AZ
MCAA Member Chicago Block and Brick, Co. Mundelein IL
MCAA Member Crego Block Albuquerque NM
MCAA Member Gagne & Son Concrete Block Belgrade ME
MCAA Member Illinois Brick Company Palos Heights IL
MCAA Member Lehi Block Company, Inc. Lehi UT
MCAA Member Lurvey Supply Des Plaines IL
MCAA Member McMaster Concrete Products Medley FL
MCAA Member ORCO Block & Hardscape Stanton CA
MCAA Member RCP Block & Brick, Inc. Lemon Grove CA
MCAA Member Thompson Building Materials, Inc. San Diego CA
MCAA Member Waldo Bros. Company Boston MA
MCAA Member Yavapai Block & Precast Prescott AZ

“The MCAA is perfectly suited to provide webinars and other training resources.”

Todd Witmer
The Witmer Group
MCAA member since 1995

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