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determining mixing and compaction temperatures of

determining mixing and compaction temperatures of

Determining Lab Mixing and Compaction Temperatures for ...

Asphalt Institute Technical Advisory Committee Approved 7 December 2016 The Asphalt Institute recommends that, for unmodified asphalt binders, the laboratory mixing and compaction temperatures should be determined where the viscosity-temperature line crosses the viscosity ranges of 0.17 ± 0.02 Pa-s (mixing temperature range) and 0.28 ± 0.03 Pa-s (compaction temperature range).

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Determining Mixing and Compaction Temperatures of

developed in this study, can be used for determining mixing and compaction temperatures of RAP-WMA, which is a combination of the equiviscous principle and the equivolumetric principle. Compared with RAP-HMA, the reductions in mixing and compaction temperatures of RAP-WMA determined using this method are around 25°C.

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Laboratory Mixing and Compaction Temperatures for Asphalt ...

Feb 15, 2012  Research on Lab Mixing and Compaction Temperatures • NCHRP 9-39, Procedure for Determining Mixing and Compaction Temperatures of Asphalt Binders in Hot Mix Asphalt – Purpose • Identify or develop a simple, rapid, and accurate laboratory procedure for determining the mixing and compaction temperatures of asphalt binder – NCHRP Report 648

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Determining the Correct Mixing and Compaction

Determining the Correct Mixing and Compaction Temperatures for Using High RAP Content in HMA Huachun Zhai, Ph.D, P.E. Alejandro Rosales Erin L. Russell 1.Introduction 2.Objectives 3.Material and Test Methods 4.Results and Discussion 5.Summary of Findings 2017 Idaho Asphalt Conference 10/26/2017 2 57th Idaho Asphalt Conference, October 26, 2017 1

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DETERMINATION OF MIXING AND COMPACTION

•Determine mixing temperature where viscosity = 150-190 centipoise (.15-.19 Pa.s) •Determine compaction temperature where viscosity =320-380 centipoise (.32-.38 Pa.s) The following data plot (slide 10) shows a PG 58-28 tested over the range of 76° C to 94° C at a range of stress levels.

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Mixing and Compaction Temperatures of Asphalt Binders in ...

When compared with the equiviscous method for determining mixing and compacting temperatures, the workability tests resulted in compaction temperatures 9°C to 28°C (16°F to 50°F) lower for modified asphalts and about the same temperature for unmodified asphalt.

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Determining the Correct Mixing and Compaction

Determining the Correct Mixing and Compaction Temperatures for Using High RAP Content in HMA Huachun Zhai, Ph.D, P.E. Alejandro Rosales Erin L. Russell 1.Introduction 2.Objectives 3.Material and Test Methods 4.Results and Discussion 5.Summary of Findings 2017 Idaho Asphalt Conference 10/26/2017 2 57th Idaho Asphalt Conference, October 26, 2017 1

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DETERMINATION OF MIXING AND COMPACTION

•Determine mixing temperature where viscosity = 150-190 centipoise (.15-.19 Pa.s) •Determine compaction temperature where viscosity =320-380 centipoise (.32-.38 Pa.s) The following data plot (slide 10) shows a PG 58-28 tested over the range of 76° C to 94° C at a range of stress levels.

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Mixing and Compaction Temperatures of Asphalt Binders in ...

This report identifies improved test methods for determining laboratory mixing and compaction temperatures of modified and unmodified asphalt binders. The report will be of immediate interest to materials engineers in state highway agencies and the hot-mix asphalt (HMA) construction industry.

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Mixing and compaction temperatures of asphalt binders in ...

This report identifies improved test methods for determining laboratory mixing and compaction temperatures of modified and unmodified asphalt binders. The report will be of immediate interest to materials engineers in state highway agencies and the hot-mix asphalt (HMA) construction industry.

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Asphalt Institute

The Asphalt Institute recommends that, for unmodified asphalt binders, the laboratory mixing and compaction temperatures should be determined where the viscosity-temperature line crosses the viscosity ranges of 0.17 ± 0.02 Pa-s (mixing temperature range) and 0.28 ± 0.03 Pa-s (compaction temperature range).

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Evaluation of Mixing and Compaction Temperatures (MCT) for ...

Dec 01, 2019  Being that the selection of suitable temperatures for modified asphalt is a complicated process [19,22,23], there is a need to standardize the other methods of determining suitable mixing and compaction asphalt temperatures.

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Methodology of Mixing and Compaction Temperatures for ...

Apr 26, 2012  As a result, the mixing and compaction temperature for modified asphalt can be determined to deliver 0.17±0.02Pa⋅s and 0.28±0.03Pa⋅s for HMA mixing and compaction, respectively. The difference between temperatures obtained with the methodology and temperatures at which optimal compaction effect can be obtained is less than 5°C.

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MIXING AND COMPACTION TEMPERATURES FOR HOT MIX

According to Superpave mixture design, gyratory specimens are mixed and compacted at equiviscous binder temperatures corresponding to viscosities of 0.17 and 0.28 Pa*s, respectively. These were the values previously used in the Marshal mix design method to determine the mixing and compaction temperatures

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METHODOLOGY FOR DETERMINING MOST SUITABLE

compaction temperature can result in design binder contents that are as much as 0.5% lower than if compacted at 135°C [3]. If asphalt mixtures cooler than desirable temperature, a variation in mix temperature (temperature differentials) can cause poor mix compaction leads to non-

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Mixing and Compaction Temperatures of Asphalt Binders in ...

Mar 23, 2016  TRB’s National Cooperative Highway Research Program (NCHRP) Report 648: Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt explores enhanced test methods for determining laboratory mixing and compaction temperatures of modified and

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MIXING and COMPACTION RECOMMENDATIONS for WARM

has been used to determine mixing and compaction temperatures of hot mix asphalt (McLeod, 1967; Roberts et al., 1996). Compaction temperatures recommended using this procedure affect the general workability of the asphalt mixture since equi-viscous binder conditions are used.

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Preparing and Determining the Density of Bituminous ...

1.1 This standard covers the compaction of 150 mm diameter and 100 mm diameter test specimens of hot mix asphalt (HMA) using the Superpave gyratory compactor. It also covers the monitoring of specimen density during compaction. 1.2 The values stated in SI units are to be regarded as the standard.

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Read "Mixing and Compaction Temperatures of Asphalt ...

A-1 A P P E N D I X A Responses of Survey on Agency Specifications Regarding Mixing and Compaction Temperatures State/Organization 1. Procedure to determine mixing and compaction temperature for unmodified hot mix asphalt? 2. Procedure to determine mixing and compaction temperature for polymer- modified hot mix asphalt? 3.

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How can I determine the appropriate curing time for ...

When I performing Marshall mix design method and using midified binder to determine the compaction and mixing temperature, it got unreasoable temperature which was carried on Brookfield test.

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DETERMINATION OF MIXING AND COMPACTING

mixing and compaction temperature for the bitumen grades. Historically, standardized procedures for determining mixing and compaction temperature should be used in the laboratory for mixture design have not provided valid temperatures for many asphalt mixtures for

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Determining Mixing and Compaction Temperatures of

Determining Mixing and Compaction Temperatures of Evotherm® Warm Mix Asphalt Using 100% Reclaimed Asphalt Pavement. Laboratory viscosity testing of asphalt binder and compaction testing of asphalt mixture were performed to develop a rational method for determining mixing and compaction temperatures of warm mix asphalt (WMA) using 100% reclaimed asphalt pavement (RAP), RAP-WMA,

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Determining Method for Mixing and Compaction Temperature ...

According to the relationship of the viscosity and temperature when the mixture reached Optimum compaction effect and the shear rate, the viscosity shear rate of the testing modified asphalt mixture, 60s-1 has been found. The test results show that the difference between the compaction temperature of the modified asphalt mixture and the compaction temperature under the condition of the best ...

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Mixing and Compaction Temperatures for Hot Mix Asphalt ...

According to Superpave mixture design, gyratory specimens are mixed and compacted at equiviscous binder temperatures corresponding to viscosities of 0.17 and 0.28 Pa's, respectively. These were the values previously used in the Marshal mix design method to determine the mixing and compaction temperatures

get price

Read "Mixing and Compaction Temperatures of Asphalt ...

A-1 A P P E N D I X A Responses of Survey on Agency Specifications Regarding Mixing and Compaction Temperatures State/Organization 1. Procedure to determine mixing and compaction temperature for unmodified hot mix asphalt? 2. Procedure to determine mixing and compaction temperature for polymer- modified hot mix asphalt? 3.

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Predicting Mixing and Compaction Temperatures of

The standard method (ASTM D 2493) aims to determine mixing and compaction temperatures of the base or unmodified bitumen. Nevertheless, the application of this method in the case of polymer modified bitumen led to very high temperatures which may not be appropriate for PMB. In this paper, some

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Laboratory Mixing and Compaction Temperatures for

Research on Lab Mixing and Compaction Temperatures • NCHRP 9-39, Procedure for Determining Mixing and Compaction Temperatures of Asphalt Binders in Hot Mix Asphalt – Purpose • Identify or develop a simple, rapid, and accurate laboratory procedure for determining the mixing and compaction temperatures of asphalt binder – NCHRP Report 648 ...

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Laboratory Mixing and Compaction Temperatures for

Research on Lab Mixing and Compaction Temperatures • NCHRP 9-39, Procedure for Determining Mixing and Compaction Temperatures of Asphalt Binders in Hot Mix Asphalt – Purpose • Identify or develop a simple, rapid, and accurate laboratory procedure for determining the mixing and compaction temperatures of asphalt binder

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METHODOLOGY FOR DETERMINING MOST SUITABLE

compaction temperature can result in design binder contents that are as much as 0.5% lower than if compacted at 135°C [3]. If asphalt mixtures cooler than desirable temperature, a variation in mix temperature (temperature differentials) can cause poor mix compaction leads to non-

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Performance Graded (PG) Asphalts - State

Feb 25, 2003  and 165ºC to determine laboratory mixing and compaction temperatures. Lab Mixing Compaction Temperatures for Unmodified Asphalt.1.2.3.5 1 10 5 100 110 120 130 140 150 160 170 180 190 200 Temperature, C Viscosity, Pa s Compaction Range Mixing Range. Asphalt binder’s response to

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MIXING and COMPACTION RECOMMENDATIONS for WARM

has been used to determine mixing and compaction temperatures of hot mix asphalt (McLeod, 1967; Roberts et al., 1996). Compaction temperatures recommended using this procedure affect the general workability of the asphalt mixture since equi-viscous binder conditions are used.

get price

Mixing and Compaction Temperatures of Asphalt Binders in ...

Mar 23, 2016  TRB’s National Cooperative Highway Research Program (NCHRP) Report 648: Mixing and Compaction Temperatures of Asphalt Binders in Hot-Mix Asphalt explores enhanced test methods for determining laboratory mixing and compaction temperatures of modified and

get price

NCHRP - Transportation Research Board

The Asphalt Institute (AI) procedure for determining mixing and compaction temperatures of asphalt binders was developed for the standard penetration- and viscosity-graded materials predominantly used in the United States until the 1990s. Since that time, the use of modified binders in hot mix asphalt (HMA) paving has increased significantly.

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Evaluation of Viscosity Values for Mixing and Compaction ...

Aug 04, 2006  For many years, ASTM D 2493 has been used as a reference for determining mixing and compaction temperatures for asphalt binders. However, this method only applies to neat or unmodified binders. With the inception of modified binders, which incorporate various additives that stiffen binders, this method predicts unreasonably high mixing and ...

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