High Cement Content Problems Pittsford 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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Huttig Building Products
(518) 767-9220
421 Creble Rd
Selkirk, NY
Gotham Sand & Stone Corp
(516) 883-2800
W Shore Rd
Port Washington, NY
R 2 M Building Products Inc
(585) 241-3220
3543 Winton Pl
Rochester, NY
Triple A Building Center
(315) 265-2350
RR 56
Potsdam, NY
Bedrock Material Inc
(914) 423-6000
255 Lake Ave
Yonkers, NY
ADS Masonry
585-698-0756
1900 university ave
rochester, NY
Triple A Building Center
(315) 769-2481
3 Malby Ave
Massena, NY
Details
(718) 448-2978
186 Clove Rd
Staten Island, NY
Griffin's
(518) 747-4124
69 Pearl St
Hudson Falls, NY
Abt Building Maintenance Services Inc
(718) 677-3900
1011 E 37th 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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