Type III Portland Cement Stockton CA

All portland cement contains both tricalcium silicate and dicalcium silicate. Tricalcium silicate hydrates faster than dicalcium silicate. Type III portland cement contains a greater concentration of tricalcium silicate; therefore, it generally hydrates faster.

Pengilly Masonry Inc
(209) 467-7722
747 Wilshire Ave
Stockton, CA
 
Advanced Engineering Service
(209) 952-7926
10774 Savoy Cir
Stockton, CA
 
E & J Plastering
(209) 465-4027
3992 Howard Rd
Stockton, CA
 
Copperfield Chimney Supply
(209) 941-2900
1505 Tillie Lewis Dr
Stockton, CA
 
Mike Rogers Masonry
(530) 644-5026
2120 Oak Leaf Ct
Stockton, CA
 
Old World Chimney Sweep
(209) 951-2832
8441 Edgefield Way
Stockton, CA
 
Saiers Masonry
(209) 320-1080
7500 West Ln
Stockton, CA
 
Copperfield Chimney
(209) 941-2929
1953 Madrid Dr
Stockton, CA
 
Design Masonry Group
(209) 466-6646
4500 E Fremont St
Stockton, CA
 
Greer Stucco
(209) 286-1433
8349 Lafayette St
Stockton, CA
 

Type III Portland Cement

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Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: July 1, 1996

If you use Type III portland cement, can you repoint brick masonry when the wall temperature is below freezing?

I do not recommend repointing when the surface temperature of the brick masonry is 40 F or less. Although Type III portland cement will perform slightly better than Type I in this situation, the advantage may not be enough to prevent freezing. Type III portland cement performs better because it hydrates faster. All portland cement contains both tricalcium silicate and dicalcium silicate. Tricalcium silicate hydrates faster than dicalcium silicate. Type III portland cement contains a greater concentration of tricalcium silicate; therefore, it generally hydrates faster. Furthermore, Type III cement is finer, and will also hydrate faster for this reason. The faster the portland cement hydrates, the less time the mortar must be kept warm. When mortar hydrates faster, it generates more heat. And the warmer the mortar, the faster it will hydrate. Most Type I portland cement sold today, however, contains fairly high concentrations of tricalcium silicate and is ground more finely than in the past. This brings it close to the requirements of Type III portland cement, so there may be little practical difference between Type III and Type I portland cements.There is a greater risk of mortar freezing when repointing than when installing new masonry during cold weather.

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