Section 4116. Class V Aggregate for Portland Cement Concrete
4116.01 DESCRIPTION.
A mixture of fine and coarse particles of feldspathic rocks from an approved source as described in Materials I.M. 409.
4116.02 GRADATION.
Meet the gradation requirements for gradation No. 7 of the Aggregate Gradation Table, Article 4109.02.
4116.03 QUALITY.
A. For the portion retained on the No. 4 sieve, meet the requirements of Table 4116.03-1 for coarse aggregate for concrete.
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Table 4116.03-1: Aggregate Quality |
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Aggregate Quality |
Maximum Percent Allowed |
Test Method |
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Abrasion |
40 |
AASHTO T 96 |
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A Freeze |
6 |
Office of Materials Test Method No. Iowa 211, Method A |
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Clay Lumps |
0.5 |
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B. For the portion of Class V aggregate passing the No. 4 sieve, meet the requirements of Table 4116.03-2 for fine aggregate for concrete:
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Table 4116.03-2: Fine Aggregate Quality |
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Fine Aggregate Quality |
Test Limits |
Test Method |
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Shale and Coal |
2.0 % (maximum) |
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Mortar Strength |
6000 psi (minimum) |
Office of Materials Test Method No. Iowa 212 |
4116.04 COMBINATIONS.
Use Class V aggregate for PC concrete only in combination with limestone as specified in Materials I.M. 529. Acquire limestone from sources meeting the specified coarse aggregate durability for PC concrete.
A. Fine Limestone.
Meet the gradation requirements for gradation No. 8 of the Aggregate Gradation Table, Article 4109.02.
B. Coarse Limestone.
Meet the requirements of Section 4115.
4116.05 CEMENT REQUIREMENTS.
For Interstate and Primary projects, use the cement types and substitutions of Table 4116.05-1 when Class V aggregate is used.
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Table 4116.05-1: Cement Types and Substitutions |
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Cement Type |
Min. Required Substitution |
Max. Allowable Substitution |
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Type I, |
20% Class F Fly Ash |
25% Class F Fly Ash |
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Type I, |
25% GGBFS |
35% GGBFS |
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Type IS, IP, IT |
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20% Class C Fly Ash |