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NCHRP Research Results Digest 253: Recommended Use of

DEVELOPING THE MIX DESIGN, 9 Determining Combined Aggregate Gradation, 10 Verifying Aggregate Properties, 10 Handling RAP in the Lab, 10 Modifications to Standard Mix Design Procedures, 10 FIELD QUALITY CONTROL–QUALITY ASSURANCE TESTING, 10 Additional Quality-Control Procedures with RAP Mixtures, 11 REFERENCES, 11 APPENDIX, 12 Equations, 12

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Optimized Aggregates Gradations for Portland Cement

will exhibit a better and closer performance due to the denser gradation. This new 47BR combined gradation limits gives an opportunity that would allow the use of more locally available materials currently being produced in the state, thereby optimizing its economy. d *Proportioned Mix Designs o 7 y s w)) h) h)) t) NDOR's Req. Max 0.48 3500

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Superpave Gradation Requirements – Pavement Interactive

Superpave mix design specifies aggregate gradation control points through which aggregate gradations must pass. These control points are very general and are a starting point for a job mix formula.. These tables (data taken from AASHTO MP 2, Standard Specification for Superpave Volumetric Mix Design) show typical Superpave aggregate specifications for 37.5 mm (1.5 inch) down to 9.5 mm (0.375

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Optimized Aggregates Gradations for Portland Cement

Based on the field trial performance the results have helped NDOR to identify the combined aggregate gradations that would help improve the current mix design the Nebraska Department of Roads have had for the last 60 plus years. These initial efforts have dealt with the concept of maximum density with the idea of a denser gradation.

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Asphalt Mix Design

Mix Composition TxDOT's automated Mix Design Report includes the following worksheets: •Combined Gradation •Material Properties •Aggregate Classification Blending •Weigh-Up Sheet •Aggregate Bulk Gravity •Summary •Power 0.45 Curve •Asphalt Content versus Density, VMA, G a, and G r

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Gradation Techniques

Shilstone Workability-Coarseness Chart Starting in the late 1980s, James Shilstone revealed a mixture design process based on the proportioning of the aggregate using the combined gradation to proportion a group of sieve sizes that can be categorized as coarse, intermediate, and fine aggregate.

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MT 122 Optimized Aggregate Gradation for Hydraulic

OPTIMIZED AGGREGATE GRADATION FOR . HYDRAULIC CEMENT CONCRETE MIX DESIGNS . 1 Scope . 1.1 This method outlines the procedure for analyzing combined aggregate gradations for optimized concrete mix designs. 2 Referenced Documents . MT Materials Manual . MT 201 Sampling Roadway Materials . MT 202 Sieve Analysis for Fine and Coarse Aggregate . 3

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METHOD OF TEST FOR COMBINING GRADATIONS FOR HOT

1. Determine the percentagethat will be used in the mix design (maximum 25% RAP and/or RAS in the aggregate blend. RAS is not to exceed 5%). 2. Determine the combined gradation of the HMA mixture based on proposed proportions of RAP and/or RAS and aggregate to be used in accordance with Section G.1.b. of this test method. 3.

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Method of Test to Determine Combined Gradations for Hot

2. Determine the combined gradation of the HMA mixture based on proposed proportions of RAP and aggregate to be used in accordance with section F.1.b. 3. Calculate batch weights for each ingredient in the mixture using the provided batching sheet. 1Note : When using RAP in HMA mix designs, the aggregate gradations and total

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835.1 Concrete Pavement and Concrete Structures 835.1.1

Aggregate gradation sampling and testing must be performed according to the QMP provision. 835.1.4.1 Combined Gradation A combined aggregate gradation analysis should only be conducted on samples collected during the production of concrete. This analysis is performed using the as-batched aggregate proportions for a production load of concrete.

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(PDF) Concrete Aggregate Combined Gradation Example

This is the combined weight of cement, fly ash, silica fume, and other pozzolans used in the mix. The procedure shown is the same for other combinations of aggregates. Individual Aggregate Gradations Combined Gradations For each aggregate used in the mix design, include a gradation analysis that is representative of the aggregate.

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Optimized Aggregates Gradations for Portland Cement

The goal for the new 47BR Combined Aggregate Gradation is to have the contractor, with agency oversight, develop a concrete mix design with an optimum combined aggregate gradation and provide the Contractor with the testing and control responsibilities to ensure a quality product.

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Combined Gradation Example

For each aggregate used in the mix design, include a gradation analysis that is representative of the aggregate. The gradations should be current and are typically the average of more than one individual test for each aggregate. The following chart shows example individual aggregate gradations and combined aggregate gradation information.

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A Durable Concrete Mix Design Approach using Combined

The authors of the manuscript titled "A Durable Concrete Mix Design Approach using Combined Aggregate Gradation Bands and Rice Husk Ash Based Blended Cement" declare no conflict of interest of any of the authors with any organization in the subject matter discussed in the manuscript.

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