Phoenix Cement® Rapid Power™ Type III (LA) meets all chemical and physical requirements
of the current ASTM Specification C 150 for Type III Low Alkali Portland Cement and C 1157
HE, High Early Strength cement, as well as the requirements for Type III (HS). Rapid Power™
Type III (LA) is a high early strength cement suitable for use in most general construction
applications.
Durability
Rapid Power™ Type III (LA) is save for use in any application where protection against moderate or high sulfate attack is required.
The (LA) designation indicates low alkali requirements of ASTM C 150 are met, thereby reducing the potential for damage due to alkali-aggregate reactivity.
Economy
Rapid Power™ Type III (LA) can provide high early strengths more economically than richer mixes utilizing a Type I/II/V cement.
Salt River Materials Group has manufactured cement specifically designed for the Southwest since
1959. This experience enables Salt River Materials Group to continue to provide some of the highest
quality cement products available. Salt River Materials Group is the commercial trade name for all
marketing activities for Phoenix Cement Company and Salt River Sand and Rock.
Applications
Due to early-age strength development, Rapid Power™ Type III (LA) is excellent for:
• “Fast Track” paving or pavement repairs that must be put into service quickly
• Precast/prestressed and other cast structures that require early form removal
• Cold weather concrete applications where the controlled curing period is shortened
• Earlier splitting strength and reduced breakage in concrete masonry production
Strength, Set Time and Pumping Ability
Due to a higher fineness, Rapid Power™ Type III (LA)produces higher early-age strengths in concrete. In tests comparing Type I/II/V cement to Rapid Power™ Type III (LA), average one-day strengths were 30% higher in mixes utilizing Rapid Power™ Type III (LA) cement. Initial set times (by Vicat method) for Rapid Power™ Type III (LA) are approximately 20 to 25% faster than our Type I/II/V cement.
TYPE I I I (LA) PORTLAND CEMENT
Availability
Rapid Power™ Type III (LA) is produced year-round at our Clarkdale manufacturing facility 100 miles north of Phoenix. It is available in bulk and sack, by rail or truck, 7 days a week.
Mission Statement
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Solutions with Quality
Products and Exceptional
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8800 E. Chaparral Rd., Ste 155 | Scottsdale, AZ 85250(480) 850-5757 | Fax: (480) 850-5758 | www.srmaterials.com
Chemical AnalysisAverage Results
ASTM C 150 Specification
Calcium Oxide, Ca0 63.94% NA
Silicon Dioxide, Si02 21.29% NA
Aluminum Oxide, Al203 3.87% NA
Ferric Oxide, Fe203 3.55% NA
Magnesium Oxide, Mg0 1.86% 6.00% Max
Sulfur Trioxide, S03 2.83% 3.50% Max
Loss on Ignition 1.25% 3.00% Max
Insoluble Residue 0.30% 0.75% Max
Alkalies (%Na20+0.658% K20) 0.42% 0.60% Max
Potential Composition
Tricalcium Silicate, C3S 59% NA
Tricalcium Aluminate, C3A 4% 5% Max (HS)
Dicalcium Silicate, C2S 16% NA
Physical Data
Fineness, Blaine cm2/gm 5320 NA
Specific Gravity 3.15 NA
Autoclave Expansion -0.01% 0.80% Max
Air Content 7.50% 12.00% Max
Compressive Strength (psi)
1 Day 3020 1740 Min
3 Day 4630 3480 Min
7 Day 5590 NA
28 Day 6560 NA
Time of Setting, Vicat
Initial Set 1:35 0:45 Min
Final Set 3:35 6:15 Max
Photo micrographs of cement crystal structure
Clarkdale Shipping Facility
Cement Rotary Kiln, Clarkdale AZ
Sacking Operation, Clarkdale AZ
Clarkdale Limestone Conveyor System