High Cement Content Problems Fairport 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

Panel World
(718) 332-1700
2604 Coney Island Ave
Brooklyn, NY
84 Lumber Co
(607) 257-8484
1818 Hanshaw Rd
Ithaca, NY
Home Depot the
(516) 542-9200
2000 Hempstead Tpke
East Meadow, NY
Ksz Construction Inc
(718) 645-0008
342 Avenue Y
Brooklyn, NY
Kuiken Brothers Company Inc
(845) 986-2255
33 South St
Warwick, NY
ADS Masonry
585-698-0756
1900 university ave
rochester, NY
Lemle & Wolff Building Mgt
(212) 304-3890
125 Vermilyea Ave
New York, NY
Matthews & Fields Lumber
(585) 334-5500
1230 Lehigh Station Rd
Henrietta, NY
Strober Long Island
(631) 249-2400
1294 Broadhollow Rd
Farmingdale, NY
McMahon Custom Cabinets Inc
(631) 287-3054
153 Powell Ave
Southampton, 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...

Click here to read full article from Masonry Construction