After compaction, the hot asphalt layer will match the height of the cold mat, assuming that the crew has correctly calculated the compaction rate. Remember, the compaction rate, as a general rule, is about 6 mm (1/4) per 25 mm (1) of screed laid thickness when a vibratory screed is used and about 5 mm (1/5) per 25 mm (1) when a tamping an Page 5 Standard Construction Specifications Division 40 - Asphalt Surfacing Revised 11/08 Regardless of the test results, a non-stripping additive shall be added to the asphalt in the amount of one-half percent (0.5%) by weight of the asphalt. Such additive material shall be of quality and grade acceptable to the Engineer Calibration standards. having a range in densities that spans the expected density of the asphalt concrete to be tested. The standards shall be rectangular in shape with smooth surfaces of sufficient size to not change the count rate if enlarged in any dimension
QUALITY CONTROL MANUAL FOR HOT MIX ASPHALT USING STATISTICAL PAY FACTORS Field Compaction Requirement Quality Contr. R SWﬁQJ. Levels (excluding the manager) (see Note 3) Method Compaction 3 (see Note 1) Density Testing 4 (see Note 2) Note 1 One hot mix asphalt inspector at the plant, one at the site o All mixtures supplied in compliance with one of the EN 13108 product standards are prefixed by an abbreviation which identifies the mixture type, the principal ones being: AC (asphalt concrete), HRA (hot-rolled asphalt) and SMA (stone-mastic asphalt). More details on mixture designations are given below
An asphalt-concrete mix must be fully compacted before it cools to a temperature of about 175 F. At temperatures above this value, the mix is normally still warm enough for the compaction equipment to reorient the aggregate particles into their densest configuration Asphalt binder lubricates the aggregate during compaction. Mixes with low asphalt contents are generally more difficult to compact because of inadequate lubrication, whereas mixes with high asphalt contents will compact more easily but may shove under roller loads (TRB, 2000)
SPECIFICATIONS FOR ASPHALT PAVING, MATERIALS, SAMPLING, AND TESTING 9.0 COMPACTION REQUIREMENTS.. 7 Table 5 - Asphalt Compaction Specifications.. 7 9.1 Criteria for Acceptance or Rejection and Removal Based on In-Place Compaction. 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) A Note on the Time Available for Compaction. HMA temperature directly affects asphalt binder viscosity and thus compaction. As HMA temperature decreases, the constituent asphalt binder becomes more viscous and resistant to deformation resulting in a smaller reduction in air voids for a given compactive effort.As the mix cools, the asphalt binder eventually becomes stiff enough to effectively.
Research and history have shown that important factors in improving density in asphalt pavements involve compaction specifications, lift thickness and mix design. Of the three factors, compaction specifications are often considered the most important. Yet proper compaction is strongly related to proper lift thickness and mix design Asphalt compaction is a mechanical process. Various forces are used to make the asphalt layer denser after the asphalt paver has laid it down. Then purpose of the compaction is to reduce the amount of air voids in the asphalt layer and to move the aggregate in the layer closer together
.0 SECTION 32 12 16 BART FACILITIES STANDARDS Issued: 09/30/2008 STANDARD SPECIFICATIONS B. Base course shall be minimum uniform thickness after compaction of dimensions indicated Compaction Testing of Hot- Mix Asphalt Pavements (HMA) Tables and Charts Forms: Tables for Converting Total Dry Density to Density of the -3/4 inch Material. Maximum Density / Optimum Moisture Table. Table for Estimating Percent of Lot Within Tolerance. Forms: T313 A performance grade (PG) 64-22, a common grade of asphalt binder in Kentucky, was used for the laboratory standard binder. The job mix formula (JMF) was a SuperPave, KY Class 2 asphalt surface that is commonly placed on non-primary routes and is intended for traffic up to 3 million ESALs
During the morning meeting, the compaction team will have discussed what influences the roller settings, including mix design and material temperature. For example, if the job calls for a polymer-modified asphalt (PMA), the temperature of the mix will probably be 40 to 50 degrees greater than typical paving temperatures compaction is reached and that the limit values for the void content are complied with. This results in an enhanced stability of the layers and thus in a higher resistance against deformation. Good compaction also has a positive effect on the wear resistance of the wearing course. 1. Basic principles of asphalt compaction 1.1 Principle COMPACTION TESTING OF HOT-MIX ASPHALT PAVEMENTS _____ 1.0 PURPOSE 1.1 The purposeof this procedure is to establish the test methods for quality control testing by the Contractor and verification testing by the Division. 2.0 SCOPE 2.1 This procedure is applicable for all items of hot-mix asphalt pavements requiring compaction testing. 3.0. 1.1 This test method covers the compaction of asphalt mix into cylindrical specimens using the Superpave Gyratory Compactor (SGC). This standard also refers to the determination of the relative density of the compacted specimens at any point in the compaction process. Compacted specimens are suitable for volumetric, physical property, and mechanical testing
Standard proctor test 2,5 kg falling weight 300 mm falling height 25 blows per layer Soil compaction Proctor curve Moisture content (%) Proctor curves of Application guidelines Asphalt compaction • shoving • rippling • poor ﬁnish • poor compaction results vibratory compaction for high mix temperature heavy duty vibratory rolle relative to compaction of asphalt concrete. The report is divided into five sections covering (1) basic concepts, (2) performance relationships, (3) factors influencing compaction, (4) compaction control, and (5) specifications. The report summarizes why compaction is important and how adequate compaction can be achieved • REVISE T 245 - split into 2 standards- compaction Method and Test(s ) • REVISE R 35, Superpave Volumetric Design for Asphalt Mixtures - Clarification on Ps (Section 9) and blending procedure (Section 6.5 & 6.7 Compaction and Best Practices for Tender Asphalt Mixes Trevor Moore, P.Eng., GSC Corporate Technical Director Miller Paving Limited Nova Scotia User Producer Group - April 10, 201 Standard models; Advanced models, which also satisfy the compaction procedure of EN 12697-33 and include other important features. Electromechanical slab compactors feature a compacting system by roller segment head radius 535 mm. The roller segment freely moves by simple friction for better compaction uniformity
Asphalt Concrete Construction Standards Page CS 5-4 CS-SEC 05 REV: 13 February 2007 Finish rolling or final compaction shall be completed while the temperature of the mixture is at or above 150º F Types of compaction There are four types of compaction effort on soil or asphalt: Vibration Impact Kneading Pressure Soil Compaction Soil compaction is defined as the method of mechanically increasing the density of soil. In construction, this is a significant part of the building process. If performed improperly Compaction. Compaction is the process by which the volume of air in an HMA mixture is reduced by using external forces to reorient the constituent aggregate particles into a more closely spaced arrangement. This reduction of air volume in a mixture produces a corresponding increase in HMA density (Roberts et al.,1996) Any use beyond the compaction of sand, gravel, asphalt, crushed aggregate and trench stabilization is prohibited and could result in machine damage or harm to individuals. Remember, all operators should be mindful of safety at all times to keep the machines running smoothly and to maintain a safe working environment for the equipment operator.
Standard Operating Procedure for Superpave Volumetric Design for Hot-Mix Asphalt (HMA) SOP 733 (PDF 1.3 MB) Standard Operating Procedure for Determination of Pavement Density Differentials Using the Nuclear Density Gauge: SOP 734 (PDF 1.1 KB) Standard Operating Procedure for Sampling Hot Mix Asphalt After Compaction (Obtaining Cores) SOP 735. Standard Specifications, Section 39-2, Materials. B. HMAC pavement for track underlay: Type A with 3/4-inch maximum, coarse aggregate gradation. Asphalt binder shall be steam refined AR-8000 grade in accordance with Section 92 of the Caltrans Standard Specifications Asphalt-aggregate mix and compaction methods are designed based on the influence of mix components on the performance characteristics and properties of the paving mixture. In addition, asphalt mixes are specifically designed and compacted according to the variables which affect these performance properties in the field
You need to compact the asphalt to a predetermined and/or specified compaction level. For example, specifications may call for you to compact the asphalt mat to 95% of the target value (Rice Test). As you begin to roll the asphalt you will want to place the gauge on the mat and test for compaction The compaction degree can reflect the compaction quality of new asphalt pavement, the IRI can reflect the driving comfort of asphalt pavement, and the deflection value can reflect the bearing capacity of asphalt pavement . A new evaluation standard of construction quality for asphalt pavement is proposed in this study. 5.4.1  >=75 percent by count of non-asphalt coated particles.  As modified in CMM 860. 301.3 Construction 301.3.1 Equipment (1) Use specialized pneumatic or vibratory compaction equipment or a combination of both types of machines. Do not use tamping rollers. Use pneumatic compaction equipment conforming to 22.214.171.124 flexibility are controlled to a certain degree by the density of asphalt concrete. To insure adequate compaction several agencies specify in,....place density requirements. These in-place requirements are commonly expressed as a percent of a standard laboratory compaction density. Laborator
Place asphalt paving to a total thickness of 4 inches or 1-inch thicker than adjacent pavement section, whichever is greater or to the standards of the agency having jurisdiction over the area of the work. Install in accordance with Section 302-5 of the Public Works Specifications GREENBOOK. 3.11 COMPACTION OF ASPHALT CONCRETE PAVIN A good rule of thumb for asphalt thickness specification on a quotation or contract is that if compression is mentioned after the thickness, than they thickness given is likely pre-compaction. Where as if compression is mentioned in the same line or before the thickness of the aspahlt than likely post-compactions thicknesses are given The compaction of asphalt concrete mixes is currently governed by one of two types of specifications. A method specification is used for some asphalt concrete (301, 302, and 448 by 2005 specification and older), while most mix types (446 and 448 by 2008 specification and newer) are governed by a density requirement ( 446.05 and 448.03 ) Asphalt mixture compaction is an important procedure of asphalt mixture construction and can significantly affect the performance of asphalt pavement. Inadequate compaction results in low density and consequently low stiffness, reduced fatigue life, accelerated aging, rutting and moisture damage. On the contrary, adequate compaction of asphalt.
specifications. A job mix revision is only allowed between LOTS. Fax a copy of all job mix revisions to the District Asphalt Manager (DAM), the Asphalt Materials Engineer (AME), and, if appropriate, the District Materials Laboratory before starting the LOT on which the revised job mix will first be used asphalt pavement if desired) while meeting stringent air quality standards. 3 ASPHALT PAVING MIXTURES The pavement design requires the proper hot mix asphalt paving mixtures for the base and surface pavements. It is important that a Job Mix Formula for the paving mixture be established for and approved by the engineer
Table 1 - Full-Depth Asphalt Pavement Table 2 - Asphalt with Aggregate Sub-Base Pavement. Notes: Design CBR is defined as 2/3 of the soaked CBR value. VDOT Specifications for SM-4.75, SM-9.0, SM-9.5, SM-12.5, and IM-19. can be found in Section 211 of the 2016 VDOT Road and Bridges Specification Book Australian Standards, MAIN ROADS Western Australia Standards and MAIN ROADS Western Australia Test Methods and other test methods are referred to in abbreviated form (e.g. AS 1234, MRS 67-08-43 or WA 123). Compaction of Asphalt test specimens using a gyratory compactor . AS/NZS 2891.10Moisture content of asphalt D2726 / D2726M-21 Standard Test Method for Bulk Specific Gravity and Density of Non-Absorptive Compacted Asphalt Mixtures density~ air voids~ compaction~ bulk specific gravity~ PLEASE NOTE: ASTM International is providing no-cost public access to important ASTM standards used in the production and testing of personal protective equipment
compaction than of pavement thickness. Subsequent recommendations provided improved asphalt mix and compaction specifications. The YB-52 was a giant leap in scale over the heaviest World War II bombers shown here next to it, a B-17 and B-50 (background). Pavement Test As an authorized Cat® dealer, Cleveland Brothers is your exclusive source for the full lineup of specialized Cat compactors. We offer landfill compactors with additional guarding, pneumatic rollers for wear and binder courses, soil compactors with a tamping wheel tip design for extra penetration, tandem vibratory rollers with large double drums and durable general-purpose vibratory soil. Wacker Neuson equipment for soil compaction: a success story. For decades, the name Wacker Neuson has been inextricably linked with soil compaction. In 1930, the Wacker company introduced the first electric vibratory tamper, which at the time revolutionized work on the construction site. Since then, the Wacker Neuson tamper as well as vibratory. Requirements for transporting asphalt mixtures, for preparatory site work and for laying and compaction of asphalt mixtures, including the covering of concrete and sett paving, are given in this standard, which also contains in the Annexes protocols to be used for initial type testing of asphalt materials in accordance with BS EN 13108-20
Asphalt compaction test. The asphalt compaction test is for measuring how dense the asphalt mix can become in reducing the mass volume. This is to assess the durability and porousness of the substance, and how prone to grooves, channels, potholes etc. Many factors affect the compaction test Hot-Mix Asphalt Laydown and Compaction . 9727-13/Sec13 12/20/00 17:43 Page 114. 9727-13/Sec13 12/20/00 17:43 Page 115. SECTION. 13 . Mix Delivery. The purpose of the haul vehicle is to transport the asphalt mixture from the asphalt plant to the paver. This mus
This standard practice describes procedures for the compaction of cylindrical specimens of asphalt mixtures using the Marshall compaction hammer. This practice is for use with mixtures containing asphalt binder or asphalt cutback and aggregate up to 25.4-mm (1-in.) maximum size ASPHALT COMPACTION OPERATIONS - EFFECTS ON DURABILITY Rebecca McDaniel North Central Superpave Center TRB AFH60 Committee Meeting January 13, 201 This enables easy of asphalt layers. tracking of the compaction progress. Fig. 82 Asphalt Manager with compaction measuring system Fig. 83 Compaction measurement for comparison with EVIB Correlation EVIB - degree of compaction, A 65, SMA 0/8 S, BW 174 340 320 EVIB [MN/m2] 300 280 260 y = 6,6224x - 334,18 R2 = 0,5724 240 220 11 90 92 94 96 98. AASHTO R 67, 2020 Edition, 2020 - Standard Practice for Sampling Asphalt Mixtures after Compaction (Obtaining Cores) This method describes the process for removal of a core sample of compacted asphalt mixture from a pavement for laboratory testing. Cores may range in diameter from 2 in. to 12 in. This standard does not purport to address all of. Dale Starry of Volvo Construction Equipment held the education session Compaction 101: Doing the Right Things, the Right Way at World of Asphalt 2019. Integrity is the heart of construction. Developing a good reputation doesn't come from Yelp reviews, word-of-mouth, or even advertising: it comes from how long the work holds up -Emulsified asphalt -Performance graded asphalt binders •Application rate (typical) -Based on the plans and specifications •0.05-0.10 gal/sq yd for emulsion •0.03-0.08 gal/sq yd for PG asphalt -Consider the actual surface condition