High Cement Content Problems Oneonta 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

Stock Building Supply
(607) 433-1844
E Oneonta Plz
Oneonta, NY
Butts L P Inc
(607) 432-6700
56 Market St
Oneonta, NY
Dowling Lumber & Hardware Llc
(315) 363-5700
169 Cedar St
Oneida, NY
Strober Building Supply
(631) 249-2400
1294 Broadhollow Rd
Farmingdale, NY
Dinaso & Sons Bldg Supls
(718) 948-2182
520 Industrial Loop
Staten Island, NY
Patriot Masonry & Construction,Inc.
607-988-6561
81 Willow St
Otego, NY
Lowe's Home Improvement Warehouse of Oneonta
(607) 433-4000
5283 State Highway 23
Oneonta, NY
Pickett Building Materials
(607) 432-8391
6459 State Highway 23
Oneonta, NY
Speonk Lumber Corp
(631) 325-0303
207 Montauk Hwy
Speonk, NY
Garcia Brothers Hardware
(212) 862-2426
2258 Adam Clayton Powell
New York, 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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