High Cement Content Problems Poughkeepsie 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

Metal Service Supply Corp
(845) 471-1655
Noxon Rd
Poughkeepsie, NY
ABC Supply Company Inc
(845) 483-7280
900 Dutchess Tpke
Poughkeepsie, NY
Erie Materials Inc
(315) 732-6646
9545 River Rd
Marcy, NY
The Home Depot Inc Store 1229
(631) 716-0353
346 Middle Country Rd
Coram, NY
Wightman's Specialty Woods
(607) 286-9201
Cliffside Rd
Portlandville, NY
Home Depot Inc
(845) 485-0420
3470 North Rd
Poughkeepsie, NY
Lowes Home Improvement Warehouse of Poughkeepsie
(845) 298-4720
790 South Rd
Poughkeepsie, NY
Peckham Materials Inc
(914) 737-0017
Albany Post Rd
Montrose, NY
Scott's Building Supply Inc
(315) 564-5502
1082 Auburn St
Hannibal, NY
Foland's Lumber & Bldg Supls
(607) 722-8738
550 Front St
Binghamton, 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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