High Cement Content Problems Long Beach NY

Portland cement gives a mortar added durability, high early strength, a consistent hardening rate, and high compressive and bond strengths. However, mortar with excessively high cement contents can affect water permeability and durability of the masonry.

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A La Marca Construction
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14402 91st Ave
Jamaica, NY
Sanyo Enterprises Usa Inc
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11617 Sutphin Blvd
Jamaica, NY
Kabinet King
(718) 291-5023
17605 Linden Blvd
Jamaica, NY
Peter Home Improvements Corp
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Flushing, NY
SLR Industries Inc.
631 893 3934
411 Broadway
West Babylon, NY
SLR Industries Inc.
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411 Broadway
West Babylon, NY
Mr B Home Repairs
(718) 206-4900
10640 Guy R Brewer Blvd
Jamaica, NY
Franklin Stucco Of Jamaica Inc
(718) 523-0099
14815 Liberty Ave
Jamaica, NY
Cotumaccio Luigi Masonry Contrctng Co
(718) 776-2661
9071 198th St
Jamaica, NY
Academic Stone Setters Inc
(718) 463-7395
2907 119th St
Flushing, NY

Provided By:

Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: December 1, 1990


Portland cement gives a mortar added durability, high early strength, a consistent hardening rate, and high compressive and bond strengths. However, mortar with excessively high cement contents can affect water permeability and durability of the masonry. Water permeability is increased for three reasons. First, mortars with high cement content have greater shrinkage and more frequent shrinkage cracks. Shrinkage cracking often takes the form of evenly spaced vertical cracks in bed joints and evenly spaced horizontal cracks in head joints. The mortar may also separate or pull away from the body of the brick at the bond interface. Although high cement content mortar itself is less permeable, water can penetrate the shrinkage cracks. The second reason that high cement content mortars may increase water permeance is that these mortars are stiff and not easily workable. Because of this, good bond may not be achieved at the time of construction. Finally, the high strength (high cement content) mortars are hard (brittle) and don't easily accommodate movement of the masonry (due to environmental changes or foundation settlement) and therefore may result in cracking of the masonry wall. Cracks make the walls more susceptible to freeze-thaw deterioration even though hi...

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