High Cement Content Problems New Hartford 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

Chrystie Lumber
(212) 431-5558
123 Chrystie St
New York, NY
Tupper Lake Supl Co
(518) 359-3491
50 Cedar St
Tupper Lake, NY
Lowe's Home Improvement Warehouse of Utica
(315) 793-3826
Riverside Mall
Utica, NY
Lowe's Home Improvement Warehouse of Bay Shore
(631) 954-9001
800 Sunrise Hwy
Bay Shore, NY
Peckham Materials Inc
(914) 737-0017
Albany Post Rd
Montrose, NY
Buffalo Sales Assoc
(716) 875-5030
3120 Elmwood Ave
Buffalo, NY
Byram Concrete & Supl Inc
(914) 682-4477
145 Virginia Rd
White Plains, NY
Curtis Lumber Co Inc
(518) 686-7391
RR 7
Hoosick Falls, NY
Elmsford Interstate Building Materials
(845) 427-5828
211 Main St
Maybrook, NY
Sam Melvin & Sons
(718) 385-2262
2360 Fulton St
Brooklyn, 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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