High Cement Content Problems Mahopac 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

Sammarco Stone & Supply Inc
(914) 636-6563
173 Oak St
New Rochelle, NY
T D A Industries Inc
(212) 972-1510
122 E 42nd St
New York, NY
C & S Building Materials
(845) 940-1605
25 Avis Dr
Latham, NY
Home Depot the
(585) 342-0970
1111 Ridge Rd E
Rochester, NY
Family Discount Center
(914) 939-4321
112 S Ridge St
Rye Brook, NY
Mahopac Railroad Tie Corp
(845) 628-8111
911 Route 6
Mahopac, NY
Millspaugh Bros Inc
(607) 387-4641
50 Cayuga St
Trumansburg, NY
Harvey Industries
(518) 862-1490
4253 Albany St
Albany, NY
Dagostino Bldg Blocks Inc
(518) 374-3116
1111 Altamont Ave
Schenectady, NY
Home Depot the
(914) 235-7575
55 Weyman Ave
New Rochelle, 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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