High Cement Content Problems Middletown 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

Home Depot Inc
(845) 343-9200
RR 211
Middletown, NY
Bellevue Builders Supl Inc
(518) 294-6686
State Route 7
Richmondville, NY
Behler C S Inc
(716) 684-6060
203 Saint Marys St
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Bargain Outlet
(585) 637-5990
6465 Brockport Spencerpor
Brockport, NY
Wiley Bros Inc
(518) 753-4266
RR 40
Schaghticoke, NY
Rowley Building Products
(845) 343-7742
15 Golf Links Rd
Middletown, NY
Lowe's of Middletown
(845) 692-8044
700 N Galleria Dr
Middletown, NY
Brothers Building Materials
(516) 505-3262
7 Terminal Rd
West Hempstead, NY
Above All Paints and Building Supplies
(718) 937-7402
3634 35th St
Long Island City, NY
Conklin Home & Bldg Centers
(845) 744-2077
132 Main
Pine Bush, 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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