High Cement Content Problems Jamestown 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

Chautauqua Brick Co Inc
(716) 661-3825
34 Harrison St
Jamestown, NY
Empire Architectural Manufacturing
(518) 687-2310
8 Saratoga St
Cohoes, NY
Tennfort Corp
(212) 288-4565
1040 5th Ave
New York, NY
Hua Mei Building Supply
(718) 439-8986
6116 7th Ave
Brooklyn, NY
Grossman's Bargain Outlet
(518) 462-6601
96 Columbia Tpke
Rensselaer, NY
Home Depot Inc the
(716) 665-3999
935 Fairmount Ave
Jamestown, NY
Home Depot the
(631) 666-3800
1881 Sunrise Hwy
Bay Shore, NY
Sharim Corp
(212) 683-3048
72 Madison Ave
New York, NY
Allied Building Products
(718) 726-9074
2702 1st St
Astoria, NY
Fredrickson Builders Supply Inc
(716) 679-4500
320 Maple Ave
Cassadaga, 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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