High Cement Content Problems Cohoes 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

Dbl Masonry
(518) 577-2186
26b College View Dr
Albany, NY
Nys Concrete Masonry Assoc
(518) 464-1806
6 Airline Dr Ste 102
Albany, NY
Chimney Wizards
(518) 427-7603
100 Lark St
Albany, NY
Kneeland Constr Co
(518) 452-7320
25 Corporate Cir Ste 3
Albany, NY
Pcc Contracting Inc
(518) 785-8000
600 Troy Schenectady Rd
Albany, NY
Colonie Masonry Corp Of Albany Inc
(518) 370-2471
1971 Western Ave # 231
Albany, NY
Di Pace Masonry Inc
(518) 459-1834
1 Kneeland St
Albany, NY
Tompkins Masonry Corp
(518) 465-1621
210 Sheridan Ave
Albany, NY
Ipek Z & Sons Inc
(518) 371-2544
7 Railroad Ave
Albany, NY
Mauriello Construction
(518) 283-5321
6 Bentley Ave
Albany, 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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