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HOW TO DECIDE MAXIMUM SIZE OF COARSE AGGREGATE …


For the same strength or workability, concrete with large size aggregate will require lesser quantity of cement than concrete with a smaller size aggregate. In a mass concrete work the use of larger size aggregate will be useful due to the lesser consumption of cement.


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Maximum Aggregate Size & Nominal Maximum Aggregate Size


In the August 2003 version of CT 382, nominal maximum aggregate size is defined as one sieve size smaller than the maximum aggregate size. The maximum aggregate size is defined as the smallest sieve size that requires passing. For example, in the following gradation:


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What is the size of coarse aggregate used in concrete? …


Most probably 2 different sizes are used in concrete for proper grading of all ingredients and to have a good homogenity of paste. 10mm and 20mm size of aggregate are use in case of ordinary concrete. Only 10mm size of aggregate is used in case of Self- Compacting concrete. And also when the ...


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HOW TO CLASSIFY AGGREGATES ACCORDING TO SIZE ...


According to size the aggregates are classified as: Fine Aggregate Coarse Aggregate All in Aggregate Fine Aggregate It is the aggregate most of which passes 4.75 mm IS sieve and contains only so much coarser as is permitted by specification.


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Strength - Penn State Engineering


The maximum size of a well-graded coarse aggregate of a given mineralogy can have two opposing effects on the strength of normal concrete. With the same cement content and consistency, concrete mixtures containing larger aggregate particles require less mixing water than those containing smaller aggregate. On the contrary, larger aggregates ...


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Standard Specification for Concrete Aggregates


Those responsible for selecting the proportions for the concrete mixture shall have the responsibility of determining the proportions of fine and coarse aggregate and the addition of blending aggregate sizes if required or approved.


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On Aggregate Grading - National Ready Mixed …


On Aggregate Grading is good concrete performance dependent on meeting grading limits? ... different proportions of coarse aggregates (size numbers 57 and 8 per ASTM C33) and fine aggregate by volume. The NWG aggregates were developed by combining different proportions of size number 57 coarse aggregate and fine aggregates. The CF and 8-18 charts for the WG and NWG combined aggregates …


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HOW COARSE AGGREGATES AFFECT MIX DESIGN?


Maximum size of coarse aggregate: Maximum size of aggregate affects the workability and strength of concrete. It also influences the water demand for getting a certain workability and fine aggregate content required for achieving a cohesive mix. For a given weight, higher the maximum size of ...


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Stone, Gravel, or Aggregate?| Concrete Construction ...


Question: I have a specification calling for #89 gravel in the concrete mix and #57 stone for the subbase. What do these numbers mean? Answer: This all comes from ASTM C 33, "Standard Specification for Concrete Aggregates." First, there's really no difference in this context between stone and gravel and aggregate. In C 33 there's a chart showing the grading requirements for different sizes ...


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Aggregates for Concrete - GreenSpec


Aggregates for Concrete Key points • 'Aggregate' is a term for any particulate material. It includes gravel, crushed stone, sand, slag, recycled concrete and geosynthetic aggregates. Aggregate may be natural, manufactured or recycled.


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