optimized aggregate gradations ppt

You may also like

Aggregates ppt - SlideShare

Gradation B. Gradation A. Control points for 12. 5 nominal max. size. 9.5. 12.5. 19 All poss. combinations pass through cross-over point Blends containing more A than B will be closer to A Percent Passing, % 100 90 80 70 60 50 40 30 20 10 0 0.075 0.3 1 .18 Gradation A. Gradation B. Control points for 12. 5 nominal max. size. 4.75 Sieve Size, mm ...

MT 122 Optimized Aggregate Gradation for Hydraulic Cement ...

Gradation B. Gradation A. Control points for 12. 5 nominal max. size. 9.5. 12.5. 19 All poss. combinations pass through cross-over point Blends containing more A than B will be closer to A Percent Passing, % 100 90 80 70 60 50 40 30 20 10 0 0.075 0.3 1 .18 Gradation A. Gradation B. Control points for 12. 5 nominal max. size. 4.75 Sieve Size, mm ...

(PDF) Gradation of Aggregates and its Effects on ...

Table 2. 47BR Combined Aggregate Gradation Limits (Percent Passing) SUMMARY OF PHASE II Phase II Purpose: The purpose of Phase II was to evaluate the properties and performance of these blended aggregate gradations …

Gradation of Aggregates | Nature | Free 30-day Trial | Scribd

The reported approach includes the use of supplementary cementitious materials (SCMs), optimized aggregate gradations, and the use of superplasticizers (high-range water reducing admixtures). Current WisDOT practice minimizes the use of portland cement through replacement with SCMs, but does not address the use optimized aggregate gradation …

Optimized Aggregates Gradations for Portland Cement ...

Jan 14, 2015· Porosity Aggregate normally have pores of various sizes. Aggregates will absorb water when it is dry but normally release water in the concrete mix when it is wet. The amount of water and its rate of permeation depends on the size and volume of aggregate Since the aggregate comprises 75% of the concrete volume, it is essential to note that ...

Optimized Aggregate Gradation for hydraulic Cement ...

Compacted density of coarse aggregate ; Denser gradations have higher relative DRUW values; 31 Aggregate Properties. Voids Dry-Rodded Unit Weight, DRUW ; DRUW the weight of oven dry compacted aggregate that occupies a unit volume, kg/m3 or lb/ft3; 32 Voids Analysis. Interparticle voids can be minimized by using a more uniform gradation.

A Detailed Guide on Grading of Aggregates.

Coarse Aggregates. Aggregate. Coarse Aggregates Deleterious Materials ASTM C142. Mass percentage of contaminants such as clay lumps, shale, wood, mica, and coal Test Wet sieving agg. size fraction over specified sieves Mass lost = % contaminants Range from 0.2% to 10%, depending upon contaminant Aggregate. Coarse Aggregates

Modified Concrete Mixes and Optimized Aggregate Gradations

A standard mix and three variable mixes using a uniform gradation, increased aggregate amount, and increased aggregate size were used. The effective air void content was determined for each mixture.

Optimization of Aggregate Gradation and its effects on ...

Optimized Graded Concrete has been a subject widely discussed through the history of concrete. Since aggregates make up over 70% of the volume in a mixture, gradation is critical to the strength, workability, and durability of concrete. In practice only a small quantitative guidance can be

(PDF) Gradation of Aggregates and its Effects on ...

The idea that aggregate gradation could be controlled and thus affect concrete properties led to other research and ultimately to specification governing aggregate gradation. Wig et al. suggested that Fuller and Thompson ïs conclusions could not necessarily be extrapolated to aggregate different from the ones used in the original study.

Optimized Gradation for Concrete Paving Mixtures

Compacted density of coarse aggregate ; Denser gradations have higher relative DRUW values; 31 Aggregate Properties. Voids Dry-Rodded Unit Weight, DRUW ; DRUW the weight of oven dry compacted aggregate that occupies a unit volume, kg/m3 or lb/ft3; 32 Voids Analysis. Interparticle voids can be minimized by using a more uniform gradation.

PPT – Aggregates in Civil Engineering PowerPoint ...

The aggregate sample is sieved through a set of sieves and weights retained on each sieve in percentage terms are summed up. On dividing this sum by 100, The Fineness Modulus of that aggregate is determined. This helps in deciding about the quantity of aggregates of known fineness moduli to be mixed for obtaining a concrete of desired density.

PPT – Aggregates in Civil Engineering PowerPoint ...

OPTIMIZED AGGREGATE GRADATION FOR HYDRAULIC CEMENT CONCRETE MIX DESIGNS TXDOT DESIGNATION: TEX-470-A CONSTRUCTION DIVISION 2 – 6 02/06–03/16 containing example data, with the percent passing and the percent of each aggregate used in the proposed mix design. 4.4 Determine the percent of each aggregate used by the gradation analysis.

Aggregates - SlideShare

Oct 01, 2016· Fine aggregate: The aggregate which passes through 4.75 mm sieve and retained on 75 micron sieve are known as fine aggregate. Fig. Fine Aggregate 9. 2. Coarse Aggregate: The aggregate retained on 4.75 mm IS sieve are Known as coarse aggregate. Fig. Coarse Aggregate 10. 3. All-in-aggregate: It is the combination of both coarse and fine aggregate.

PPT – Aggregates in Civil Engineering PowerPoint ...

Optimized gradations are those that have been enhanced in some manner, such as making the material more well-graded, in order to enhance some property of the concrete. Additionally, particle shape has been mentioned as a possible factor in the successful use of optimized gradations. The potential benefits resulting from using optimized ...

Aggregates - SlideShare

Apr 28, 2013· 24The aggregate crushing value givesa relative measure of resistance ofan aggregate to crushing under agradually applied compressive load.The aggregate crushing strengthvalue is useful factor to know thebehaviour of aggregates whensubjected to wear.1. Crushing Test of Aggregate: 24.

Use of Optimized Aggregate Gradation for Concrete …

The idea that aggregate gradation could be controlled and thus affect concrete properties led to other research and ultimately to specification governing aggregate gradation. Wig et al. suggested that Fuller and Thompson ïs conclusions could not necessarily be extrapolated to aggregate …

Lecture 4. Aggregates

optimized aggregate gradation in the concrete industry, but not all are effective. The Shilstone Method and percent retained chart have been shown in previous research to enhance the fresh and hardened states of concrete, while also yielding more economical results. These proportioning methods were studied during this research, and found to

type of aggregate - SlideShare

Jan 14, 2015· Porosity Aggregate normally have pores of various sizes. Aggregates will absorb water when it is dry but normally release water in the concrete mix when it is wet. The amount of water and its rate of permeation depends on the size and volume of aggregate Since the aggregate comprises 75% of the concrete volume, it is essential to note that ...

OPTIMIZED GRADATION FOR CONCRETE PAVING MIXTURES

Jan 15, 2015· The implementation of a step-by-step concrete mixture design procedure to determine an optimized aggregate gradation is described. The procedure uses both the modified coarseness …

Optimization of Aggregate Gradation and its effects on ...

Jan 14, 2015· Porosity Aggregate normally have pores of various sizes. Aggregates will absorb water when it is dry but normally release water in the concrete mix when it is wet. The amount of water and its rate of permeation depends on the size and volume of aggregate Since the aggregate …

Implementation of concrete aggregate optimization ...

The maximum size of an aggregate is the smallest sieve that all of a particular aggregate MUST pass through. 4.13.03.C.1 Maximum aggregate size for each optimized gradation will depend on the …

Aggregate Gradation Optimization - Literature Search

4.3 Gradation of aggregates Gradation describes the particle size distribution of the aggregate. The particle size distribution is an important attribute of the aggregate s. Large aggregates are …

Optimization of Aggregate Gradation and its effects on ...

of concrete mixtures with aggregate under ½" in size. • Difficult to find testing equipment. • Only evaluate concrete with ½" and smaller aggregate. • We decided to build the ring molds at our machine shop per ASTM material Standards. • Needed to make testing modifications to accommodate larger aggregate …

Implementation of concrete aggregate optimization ...

Optimized Aggregate Gradations Ethan Bahmer MDOT's Statewide Concrete Construction Engineer. Modified Concrete Mixtures (High Performance) 12SP-604A-09 and 12SP-604B-10.