## Pavement Design – What’s My Structural Number?

2014-06-02· In a sense, the Structural Number is taking some critical design information – such as material properties, traffic loads, and pavement performance criteria – that exists in very different forms and boiling them down into a single number. Doing this is what makes empirical asphalt pavement design possible, so the Structural Number is a key to the entire process of designing a quality pavement.Structural Number - Pavement Interactive,The Structural Number (SN) represents the overall structural requirement needed to sustain the design’s traffic loadings. It is an abstract number that expresses the structural strength of a pavement required for givenAASHTO Pavement Thickness Design Guide,Normally 50 years for concrete and 30 years for asphalt. b., structure in order to convert actual layer thickness into structural number (SN)., 4. Pavement structural characteristics a. Coefficient of drainage (Cd or Mi) – Cd is the coefficient of drainage for rigid pavement design used to account for improved or decreased quality of drainage. Mi is the coefficient of drainageSTRUCTURAL NUMBERS FOR RECLAIMED ASPHALT,The objective of this project was to determine how the structural number of a pavement section would be affected by the introduction of Reclaimed Asphalt Pavement (RAP) in the base and subbase aggregate layers. Nine RAP/aggregate mixtures were tested: 100% RAP, and base and subbase RAP/aggregate mixtures containing 0, 10, 30, and 50% RAP. Twenty-seven resilientStructural Numbers - Civil Engineering,The design of a flexible pavement or surface treatment expected to carry more than 50,000 repetitions of equivalent single 18-kip axle load (SAI) requires identification of a structural number SN that is used as a measure of the ability of the pavement to withstand anticipated axle loads. In the AASHTO design method, the structural number is defined by . SN= SN 1 +SN 223444 OHMPA ABC Pvmnt Design - Ontario Asphalt Pavement,,STRUCTURAL MODEL Number of ESALS over Design Life FAILURE CRITERIA THICKNESS DESIGN MATERIALS Type Climatic adjustments TRAFFIC Type Weight Number Pavement Design Factors (Asphalt Institute MS-17) Table 1 Materials for Dense-graded Mixtures The ABCs of Pavement Design Celebrating Over 25 Years of Paving Excellence The Pavement: Hot mix asphalt (HMA) is a high-quality mixture of asphaltDesign & Construction of Heavy-Duty Pavements,NATIONAL ASPHALT PAVEMENT ASSOCIATION • QIP 123 Design & Construction of Heavy, by the number and weight of heavy loads, heavy static loads, and/or high tire pressures. As pavements meeting these conditions increase, heavy-duty mixes designed to withstand these loads are being used more frequently. Integrating the pavement structural and mixtureAsphalt Millings Structural Coefficient for Pavement,,2004-02-21· The actual structural coefficient will be a function of the placement density which in turn will depend at least partially (or perhaps significantly) on the placement temperature and gradation, binder, etc. of the existing asphalt pavement that will be milled. The state DOT has a laboratory procedure to establish a maximum wet density which is essentially a one pointStructural Numbers for Reclaimed Asphalt Pavement,The 1993 AASHTO pavement design guide equation for flexible pavement structures requires the determination of a structural number, which is a function of the layer coefficient, thickness, and drainage coefficient of each layer of pavement. Empirical correlations for layer coefficients have been developed based on resilient moduli. The principal factor affecting the drainage23444 OHMPA ABC Pvmnt Design - Ontario Asphalt Pavement,,STRUCTURAL MODEL Number of ESALS over Design Life FAILURE CRITERIA THICKNESS DESIGN MATERIALS Type Climatic adjustments TRAFFIC Type Weight Number Pavement Design Factors (Asphalt Institute MS-17) Table 1 Materials for Dense-graded Mixtures The ABCs of Pavement Design Celebrating Over 25 Years of Paving Excellence The Pavement: Hot mix asphalt (HMA) is a high-quality mixture of asphalt

## STRUCTURAL NUMBERS FOR RECLAIMED ASPHALT

The objective of this project was to determine how the structural number of a pavement section would be affected by the introduction of Reclaimed Asphalt Pavement (RAP) in the base and subbase aggregate layers. Nine RAP/aggregate mixtures were tested: 100% RAP, and base and subbase RAP/aggregate mixtures containing 0, 10, 30, and 50% RAP. Twenty-seven resilientAsphalt Versus Concrete — Which Is Stronger? | For,,2006-03-01· A dense-graded asphalt pavement is assigned a Structural Number of 3.0 or three times as strong per inch of thickness as the graded aggregate base. For example, a three-inch asphalt base could be,T01-15 Pavement Structure Design Guidelines,which can lead to accelerated structural damage of the asphalt pavement layer (heaving and reduced structural strengths). When reducing the thickness of the asphalt layer pavement for economic reasons, consideration must be given to the net results of: A reduction in the expected pavement life (earlier rehabilitation), and An increase of pavement maintenancePAVEMENT DESIGN MANUAL,Figure 2-3 Structural Layer Coefficient of Asphalt Bound Materials,.. 26 Figure 2-4 Structural Layer Coefficient of Chemically Stabilized Base and Subgrade,.. 27 Figure 2-5 Structural Layer Coefficient of Unbound Granular Base,.. 28 Figure 2-6 Correction of Modulus of Subgrade Reaction for Potential Loss of Base/Subbase Support.... 33 Figure 2-7 Composite Modulus ofTable of Contents,200. Structural coefficient is the only new parameter. Structural coefficients for ODOT asphalt concrete material specifications are found in Figure 401-1. 402 Structural Number Determination All of the design input information is required prior to determination of design thickness. Structural number (SN) is determined using the nomographs,Asphalt Pavement Construction | Asphalt Institute,Is the pavement structure (subgrade, subbase, base, and all asphalt layers) adequate to support the loads? You need to purchase our MS-23 Manual, Thickness Design of Asphalt Pavements for Heavy Wheel Loads. Is the hot mix asphalt surface stiff enough to resist deformation (ruts or indentations)? This is dependent on many factors, such as,TRANSPORTATION RESEARCH BOARD,2018-07-17· Structural Design of Porous Asphalt Pavements. Tuesday, July 17, 2018. 2:00-3:30 PM ET. TRANSPORTATION RESEARCH BOARD. The Transportation Research Board has met the standards and requirements of the Registered Continuing Education Providers Program. Credit earned on completion of this program will be reported to RCEP. A certificateAsphalt pavements on bridge decks - EAPA,Bridge deck pavements must meet a large number of requirements, such as: Resistance to permanent deformation, texture depth, skid resistance, , evenness, agrigidityeing resistance, etc. It also must protect and seal the underlying supporting structure as this determines to a large extend the life of the structure under the heavy load of traffic and weather conditions [3.]. TheyStructural Numbers for Reclaimed Asphalt Pavement,The 1993 AASHTO pavement design guide equation for flexible pavement structures requires the determination of a structural number, which is a function of the layer coefficient, thickness, and drainage coefficient of each layer of pavement. Empirical correlations for layer coefficients have been developed based on resilient moduli. The principal factor affecting the drainageFlexible Pavement Structural Number Calculator,Calculate the structural number of a flexible pavement with the values of thickness and layer co-efficients of asphalt, base, sub base and additional layers. Code to add this calci to your website Just copy and paste the below code to your webpage where you

## Designing Pavements for Innovative Projects to Meet,

subgrade resilient modulus to develop the asphalt pavement Structural Number (SN) and subsequently the pavement layer thicknesses. The recommended AASHTO 1993 standard deviation for pavement design ranges between 0.45 and 0.49 to account for variability of the materials and construction, and potential errors associated with the traffic data when calculating the pavementGUIDELINE FOR ASPHALT PAVEMENT DESIGN IN COLORADO,Conversion of Structural Number to layer thickness’ SN = a 1D 1 + a 2D 2m 2 + a 3D 3m 3 where – a 1, a 2, a 3 = layer coefficients representative of hot mix asphalt, aggregate base, and subbase courses – D 1, D 2, D 3 = actual thickness (in inches) of hot mix asphalt, aggregate base, and subbase courses – m 2, m 3 = drainage,Granular base equivalency - Wikipedia,Since pavement is composed of multiple layers with different physical properties, its total thickness is measured by GBE. GBE translates the thickness of different road layers to a number using a set of coefficients. So, to calculate the GBE, the depth of each layer should be multiplied by the granular equivalency factor for the material in that layer. In the next step the sum of theINTERIM PAVEMENT DESIGN PROCEDURE - NCDOT,SN = structural number required of the total pavement thickness. Design SN must be within 0.10 of this SN Required. The following inputs are used for flexible pavement design: Design period = 30 years* *A 20 year design is to be used on secondary roads with the ADT is less than 20,000 and no LCCA is needed. p o = 4.20 p tAsphalt Pavement Construction | Asphalt Institute,Is the pavement structure (subgrade, subbase, base, and all asphalt layers) adequate to support the loads? You need to purchase our MS-23 Manual, Thickness Design of Asphalt Pavements for Heavy Wheel Loads. Is the hot mix asphalt surface stiff enough to resist deformation (ruts or indentations)? This is dependent on many factors, such as,Asphalt pavements on bridge decks - EAPA,Bridge deck pavements must meet a large number of requirements, such as: Resistance to permanent deformation, texture depth, skid resistance, , evenness, agrigidityeing resistance, etc. It also must protect and seal the underlying supporting structure as this determines to a large extend the life of the structure under the heavy load of traffic and weather conditions [3.]. TheyPOROUS ASPHALT PAVEMENTS,The design of a porous pavement can be broken down into location, hydrology and structural design. This brochure will not address hydrologic design, as this should be performed by a licensed engineer proficient in hydrology and stormwater design. The general guidelines for the porous asphalt pavement design are: n Consider the location for porousResearch on the Structural Design of Asphalt Pavements for,,ISBN Number: 1-920-01712-7 Pretoria, South Africa Produced by: Document Transformation Technologies cc Conference organised by: Conference Planners RESEARCH ON THE STRUCTURAL DESIGN OF ASPHALT PAVEMENTS FOR LOW-COST RURAL ROADS YUAN GUOLIN, CHEN RONGSHENG, CHENG JIANCHUAN and DOU YOUNIAN College of,,