High Cement Content Problems Frederick MD

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.

Mcdowell'S Complete Chimney Service Inc
(410) 242-2252
2912 Hammonds Ferry Rd
Baltimore, MD
 
gt masonry contruction
(240) 723-3632
1911 laguna rd
adelphi, MD
Services
brick,stone,paver,flagstone,block stc
Membership Organizations
gt masonry contruction

Color Match Masonry
(410) 325-4008
5620 Belair Rd
Baltimore, MD
 
Chimeney A & M
(443) 375-7091
717 Johahn Dr
Baltimore, MD
 
Clasing Contracting
(410) 276-2569
1002 N Kresson St
Baltimore, MD
 
My Chimney Sweep Service
(301) 760-6712
12305 Falls rd
Potomac, MD
Services
chimney cleaning, fireplace
Hours
7am-9pm
Membership Organizations
Better Business Bureau

D & O Contracting Services Inc
(410) 462-6697
2901 Druid Park Dr
Baltimore, MD
 
Classic Masonry And Construction Company Inc
(410) 636-9651
4114 Belle Grove Rd
Baltimore, MD
 
A Third Generation Masonry Cont.
(301) 704-3726
1237 N Augusta Avenue
Baltimore, MD
 
Finest Masonry Co Inc
(410) 276-7575
4602 Ashland Ave
Baltimore, MD
 

High Cement Content Problems

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...

Click here to read full article from Masonry Construction