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3. Product Description
BASIC USE
MRT® supplies fly ash meeting ASTM, AASHTO, various state and agency requirements for fly ash from coal fired power plants to be used as a supplementary cementitious material for use in concrete paving, structures or concrete repairs. It is normally to be used with aggregates meeting gradations of ASTM C 33 and AASHTO M 43. Additives should meet ASTM C 494.
COMPOSITION & MATERIALS
MRT Specification Class C Fly ash is a byproduct of coal-fired electric generating plants and subjected to rigid quality control at MRT’s facilities.
MRT Class C fly ash is normally produced using sub-bituminous coal. Class C fly ash, in addition to having pozzolanic properties, has some hydraulic properties. Class C fly ash consists primarily of calcium alumino silicate glass, as well as quartz and tricalcium aluminate. Class C ash is also referred to as high calcium fly ash because it typically contains more than 20 percent CaO, primarily in mineral combination with other components.
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SHIPPING INFORMATION / SIZES
Typically shipped in bulk rail cars or pneumatic trucks.
YIELD
Non-air entrained concrete mixes typically will yield 140 to 150 lb per cubic foot (2.25 to 2.4 g/cubic cc) when properly mixed with water, as prescribed in the instructions below.
4. Technical Data
APPLICABLE STANDARD
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American Society for Testing & Materials (ASTM)
- C 33 Standard Specification for Concrete Aggregates
- C 39 Standard Test Method for Preparation of Concrete Cylinders
- C 94 Specifications for Ready Mixed Concrete
- C 150 Specification for Portland Cement
- C 157 Length Change of Hardened Hydraulic Cement Mortar and Concrete
- C 309 Curing Compounds
- C 311 Standard Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland Cement Concrete
- C 403 Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance
- C 494 Standard Specification for Chemical Admixtures for Concrete
- C 618 Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
- C 807 Time of Setting of Hydraulic Cement Mortar
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