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In this article, we'll discuss the standard specifications of hollow and solid concrete blocks such as dimensions, classification, physical requirements, drying shrinkage, moisture movement, water absorption, curing, and drying.
Standard concrete block masonry units are commonly available in nominal widths of 100 mm, 150, 200, 250, and 300 mm. The typical nominal height is 200 mm; although “ashlar” units (also termed “half-high” units) have a standardized nominal height of 100 mm.
Size and Shape Guide. Concrete Block Concrete Masonry Unit Terms. Concrete Block are commonly referred to as “CMUs” (Concrete Masonry Units), “Grey Block” or simply “Concrete Block.” The following are key terms commonly used to further describe different types of concrete block. A. Scored/Concave Flute. B. Stretcher End (Mortar Groove) C. Breaker.
We produce a comprehensive range of masonry building and paving blocks compliant to all of the latest technical and environmental standards for use in foundation walls, internal walls, acoustic separating walls, thermally insulating walls and permeable paving solutions for driveways.
There are several standard CMU block sizes, each suitable for specific uses: • 8" x 8" x 16" Block: This is the most commonly used block size for structural walls. It's strong and versatile, making it ideal for both load-bearing and non-load-bearing walls.
CSA A165.1 limits the dimensional tolerances on standard concrete block masonry units to: Width: ±2mm. Height: +2mm. Length: ±3mm. These provide a tolerance envelope in unit size, within which deviations in “out-of-square and warpage” and “within job lots” are permitted:
Solid Dense blocks of any strength are suitable for use as infill blocks in block and beam suspended floors and can be laid either 440mm wide or 215mm wide. Fire Resistance. Solid Dense blocks are non-combustible with zero spread of flame and are classed as Class ‘A1’.
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