High Cement Content Problems Oswego 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.

Local Companies

Raby's Ace Home Ctr
(315) 342-9663
247 Washington Blvd
Oswego, NY
Utica Cast Stone Co
(718) 629-0975
1351 Utica Ave
Brooklyn, NY
Caldwell Building
(716) 565-0281
5820 Main St Ste 600
Buffalo, NY
Lowe's of Watertown Ny
(315) 779-0059
20828 State Route 3
Watertown, NY
Mike's Lumber Store Inc
(212) 787-6661
254 W 88th St
New York, NY
Burke Home Center
(315) 343-6147
38 E 2nd St
Oswego, NY
Celtic Building Supplies
(914) 665-8864
131 W Lincoln Ave
Mount Vernon, NY
Fabco
(315) 214-0308
119 Church St
North Syracuse, NY
Knapp & Schlappi Lumber Co Inc
(607) 243-8900
71 Bigelow Ave
Dundee, NY
Contractor Express
(516) 764-0388
389 Atlantic Ave
Oceanside, 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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