High Cement Content Problems Plattsburgh 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

Red Concrete
(802) 862-3676
180 Flynn Ave Ste 11
Burlington, VT
Lowe's Home Improvement Warehouse of Plattsburgh
(518) 561-6517
19 Centre Dr
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New Eljam Prods Inc
(718) 792-8800
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(607) 359-2466
2 Wall St
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Lakeside Building Products Inc
(585) 637-4710
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Paver Kings/Maple Leaf Landscaping
(802) 324-0350
109 Raymond Rd.
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Schluter Systems
(518) 562-2410
194 Pleasant Ridge Rd
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Zim's Lumber & Stoves Ltd
(585) 968-2781
65 Genesee St
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(315) 336-0796
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Slutsky Lumber Co Inc
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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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