mcleod chip seal design method


RMPPP Chip Seals

Chip Seal Design Methods (1) North America (Ranked by prevalence) •Empirical / Past Experience •No Design •Own Method •McLeod (1960s) / Asphalt Institute •Kearby (1953) / Modified Kearby •Hanson (1934 / 1935)(Obsolete)

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Use of a Double Chip Seal to Correct a Flushing Hot Mix ...

McLeod and modified Kearby chip seal design methods use correction factors that reduce the application rate for flushed surfaces. The McLeod design method recommends reducing the binder application rate by up to 0.06 gal/sy for a flushed or bleeding surface (McLeod 1969). A

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WSDOT Chip Seals--Optimal Timing, Design, and …

conducted on several aspects of WSDOT chip seals including (1) the optimum timing for alternating chip seals (or Bituminous Surface Treatments (BSTs)) with hot mix asphalt (HMA) overlays, (2) design of chip seal application rates, and (3) a range of construction and performance factors. The research

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Seal Coat and Surface Treatment Manual: McLeod Design Method

General. In the late 1960s Norman McLeod (1969) presented the following design method which was later adapted by the Asphalt Institute (1979, 1983) and the Asphalt Emulsion Manufacturers Association (1981). In this method, the aggregate application rate depends on …

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Chip Seals. Examination of design and construction in two ...

An introduction to chip sealing is presented as well as two design methods used for estimating application rates of binder and aggregates, McLeod design method and Australian design method. Four chip sealing case studies, two from each region, are reviewed and their

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WSDOT Chip Seals--Optimal Timing, Design, and Construction ...

conducted on several aspects of WSDOT chip seals including (1) the optimum timing for alternating chip seals (or Bituminous Surface Treatments (BSTs)) with hot mix asphalt (HMA) overlays, (2) design of chip seal application rates, and (3) a range of construction and performance factors. The research

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CALCULATING CHIP SEAL DESIGN DATA | Northwest Asphalt ...

CALCULATING CHIP SEAL DESIGN DATA. Spreadsheet for Comparing McLeod and Kearny Designs. Chip seals are widely used for maintenance of pavements. Two of the popular design methods are those developed by Dr. Norman McLeod and Mr. J. P. Kearny. I am finishing the development of a spread sheet that can be used to compare the two procedures, and ...

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Chip Seal - PPRA

Performing a mix design is crucial to the success of your project. The following tests are applicable when performing a mix design for either the McLeod Method or Kearby Method. Refer to the mix design section for more details on these design methods.

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DESIGN AND EVALUATION OF CHIP SEALS THROUGH …

program lead to development of a holistic approach to chip seal design, encompassing various aspects of chip seal performance through aggregate-binder microstructural perspective. New image processing techniques were developed to understand the percent embedment and aggregate orientation behavior.

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Texas Seal Coat Design Method - Texas A&M University

Nationally and internationally, it is a consensus that the first documented seal coat design method was by Hanson in 1935, followed by Kearby in 1953, and McLeod in the 1960s. Work in the 1980s modified the Kearby method for use in Texas [2]. BASICS OF SEAL COAT

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Chip Seal Design and Specifications | Institute for ...

A comparative study between the application of McLeod method and New Zealand method is performed to evaluate the best chip seal design methodology for adoption into the State chip seal specifications. The results will also determine if the macro-texture based New Zealand chip seal performance specification is applicable for Oregon chip seals.

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Development of a New Chip Seal Mix Design Method

Modified Kearby chip seal mix design method has been modified further to accommodate an optimal board size and a minimum number of board test replicates to yield the least variability and most representative AAR to fill the ... Kearby method and the McLeod method. Although a few North American agencies have

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The Chip Seal Process and Why we do it that way

Why you should chip seal early in the season •A chip seal needs Time to fully cure: •160 hours pavement temp exceeding 110 F •The warmth is needed to soften the binder residue so that the final few percent of water that is trapped in the seal can work its way out •This means even with a good design if the seal is done late in

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Seal Coat and Surface Treatment Manual: McLeod Design Method

Chip Seal Design Method United States (%) Canada (%) Kearby/Modified Kearby 7 0 McLeod/Asphalt Institute 11 45 Empirical/past experience 37 33 Own formal method 19 0 No formal method 26 22 TABLE 1 CHIP SEAL DESIGN METHODS IN NORTH AMERICA 15 their design.

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Chip Seal - International Slurry Surfacing Association

The most common methods are the McLeod method and the Modified Kearby method. How is Chip Seal Applied? The binder is applied by an asphalt distributor which has the capability of applying the design rate at the desired width.

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Chapter Three - Chip Seal Design | Chip Seal Best ...

Chip Seal Design Method United States (%) Canada (%) Kearby/Modified Kearby 7 0 McLeod/Asphalt Institute 11 45 Empirical/past experience 37 33 Own formal method 19 0 No formal method 26 22 TABLE 1 CHIP SEAL DESIGN METHODS IN NORTH AMERICA 15 their design.

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CHIP SEAL DESIGN AND SPECIFICATIONS Final Report

A comparative study between the application of McLeod method and New Zealand method is performed to evaluate the best chip seal design methodology for adoption into the State chip seal specifications. The results will also determine if the macro-texture based New Zealand chip seal performance specification is applicable for Oregon chip seals. 17.

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