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Minimum depth of asphalt

The first, on the front range, the soils tend to be expansive soils so most contractors excavate and install 3 to 6 of road base and then install 3 of compacted hot asphalt. All of this work is done in a 1 to 2 day period Remixing - A process consisting of the following steps: (1) heating of the roadway to a depth of 1½ to 2 in. (37.5 to 50 mm), (2) scarification and collection of the softened material into a windrow, (3) mixing of the material with virgin aggregates and recycling agents in a pugmill, an Residential - Asphalt driveways need to be a minimum of 2 thick and are typically 3 (compacted)

Asphalt Driveway Thickness - How Thick Should An Asphalt

  1. Thus, a compacted asphalt thickness of 2.5 to 3 inches may be more than sufficient for a residential driveway, but a busy mixed-use lot may need a compacted asphalt thickness of 4 inches or more. The Type of Soil The soil needs to provide a strong, stable foundation for the finished pavement
  2. ous Treated Aggregate Base.
  3. The asphalt surface should not vary from established grade by more than one-eighth inch (1/8″) in ten feet (1 0′) when measured in any direction. Any irregularities in the surface of the pavement course should be corrected directly behind the paver
  4. ated the use of a prime, especially when asphalt layer(s) (surface and/or base) is 4 inches or more in thickness
  5. Asphalt paving is applied with paving machines that apply an even thickness of the asphalt paving material. That application is called a lift, by pavers. Ranging from 2 ½ to 3″ thick, each lift is compacted after application by a heavy roller compactor. For heavily-traveled roads, which must bear the constant weight of hundreds of.
  6. A conventional overlay is at least 1.5 inches thick, while a thin overlay is less than 1.5 inches thick. In this section of the article, we'll outline tips for—and best practices of—paving overlays and thin lifts

Table 15 below summarizes these minimum burial depth recommendations. These minimum cover heights are measured from the top of the pipe to the bottom of flexible paving or from the top of the pipe to the top of rigid paving. Structural backfill should be placed as directed by the design engineer. However, structural fill shoul New Construction. Use this section as an asphalt thickness calculator. A newly constructed surface is done in two layers, a 2.5-inch thick binder with a 1.5-inch thick top layer. The binder provides strength, coats loose material and plugs voids. It provides a strong enough surface for heavy equipment to work on to apply the top layer Thehot mix asphalt base may be placed in a single course. Atotal thickness of up to 4.5 of base mix may be placed in onelift.If several courses are desired or if job specificationsrequire several courses, it is recommended that the first basecourse be 3 minimum depth

But as the depth of asphalt grows to 3 inches, so too does the workability time: up to 46 minutes. Generally, for thin applications of asphalt (around 1 1/2 inches), you will want to wait until the temperatures are at 70 F or higher. Between 50 F and 60 F, you will need to consult with your contractor Do this to determine the length, width, and depth in feet of your area. The asphalt is sold in a bulk system. The minimum amount is one ton. The cost of asphalt per ton is on average, around 70 to 80 dollars in the current market. The amount depends on the manufacturing cost. So, it may vary from time to time and place to place Column 5 of Table 300.5 provides the cover depth for irrigation and landscape lighting circuits operating at 30 volts or less and installed using UF cable or other identified cables or raceways. Unless covered by concrete or installed directly under a building, the minimum cover depth in column 5 is six inches However, when using aggregate base course, the asphalt pavement thickness should be maintained at 3 and should never be less than 2. The minimum thickness of the aggregate base course should be 6 for an asphalt trail, or thicker for poorer quality sub-grade material ASTM's road and paving standards provide the specifications and test methods pertinent to the material, physical, mechanical, performance, and application requirements of road surfaces and pavements. These geotechnical surfaces are laid down on specified areas intended to sustain either or both foot and vehicular traffic

The minimum entrance radius is six feet six inches (66'- 6″}. However, eleven feet six inches (11″- 6″) is recommended. The figure below provides a guide for determining the required layout and dimensions of parking lots for both single and overlapping units Should be installed at minimum depth of 12 inches (30 cm). Installation over asphalt or concrete can cause poor impact results. Adequate drainage is essential and will lower long-term maintenance costs. • Wheelchair accessibl e • Fairly durable • Easy to obtain • Less abrasive than sand • Retards insect infestation and fungal growt Table 4-3: Design Chart for Full-Depth Asphalt Pavements Thickness Required 4-7 Table 4-4: Design Chart for Asphalt Pavements with Aggregate Base Thickness Required 4-7 Planned Stage Construction 4-8 Miscellaneous Asphalt Pavement Construction 4-8 Asphalt Pavement Mat-Platform fo

Asphalt Pavement Guide: Thickness EastCoat Pavement Service

  1. imum thickness of a high quality aggregate base course be a
  2. Minimum # of Passes @ 0.5 Rut Depth, Tested @122°F4 PG 64 or lower Tex-242-F 10,000 PG 70 15,000 PG 76 or higher 20,000 4. May be decreased or waived when shown on the plans. Test not required for RBL. Note: TxDOT also includes a maximum indirect tensile strength requirement to avoid brittle mixture
  3. construction, and facility layout. Minimum pavement thickness designs are given for various size parking lots, heavily-loaded ar eas, and industrial parking lots. In addition, this chapter gives comparable designs for both full depth asphalt pavements and asphalt over untreated aggregate base. General Planning In developing the parking area.
  4. imum of 1 ½ thick. SPECIFICATIONS FOR ASPHALT PAVEMENT . There are a wide variety of hot mix asphalt compositions used in New Jersey that vary from fine to coarse in size and gradation. Furthermore, New Jersey hot mix asphalt mixtures utiliz

Asphalt - How Thick Should It Be? » Austin, Texas » Alpha

Remove all distressed area to a depth of firm material and replace with the proper asphalt mix, allowing 25% times depth of patch for compaction. Fog seal, slurry seal or overlay. Improve drainage. Remove trees, shrubs etc., close to edge. Fill cracks with asphalt emulsion slurry or emulsified asphalt subbase with a thin asphalt or sprayed bituminous seal surfacing. 4.2. Deep Strength Asphalt Pavement A pavement comprising asphalt wearing, intermediate and base courses placed on a cementitiously treated subbase. 4.3. Full Depth Asphalt Pavement A pavement comprising asphalt wearing, intermediate an Note: When taking tests for Asphalt Concrete only record the wet density from the gauge. Direct Transmission Method. Establish an area at least 10 feet from any structure and 33 feet from other radioactive sources (another gauge) to take standard counts. This area can be concrete, asphalt, or a well compacted soil with a minimum density of 100.

» Residential Street Desig

It's a common practice that a fresh asphalt layer is adjusted within 1.5 - 2 inches in depth. However, in case of poor drainage, or if your current pavement shows too many weak spots, we may prefer applying sm even thicker new layer of up to 3 inches Senior Member. Location. Oregon Coast. May 4, 2009. #3. In the 2008 NEC, 352.10 (G) (PVC Conduit section) refers you back to Table 300.5 (minimum cover requirements, 600V and less). The burial depth of the pipe will depend on what's above it. Table 300.5 Column 3 should give you the answer for PVC. P should be cleaned to a depth of at least twice the crack width. Airflow should be free of oil and moisture and the compressed air should have a minimum pressure of 100 lb/in2 and minimum blast flow of 150 ft3/ min. These blasting operations should al-ways be directed away from passing traf-fic. Although this method is very effectiv Full depth asphalt pavement is the overwhelming choice to distribute loads to the sub-grade. However, depending on the existing soil's ability to support the loads, an aggregate base course and/or geo-textile may be used to improve the stability and/or load carrying capability of the native soil. scarifying the surface to a minimum depth of.

PG64-22 and cationic asphalt emulsion, grade CRS-2h. The type of bituminous material used in the production of HMA in Georgia is asphalt cement, grades PG64-22, PG67-22 and PG76-22. PG67-22 is the most commonly used type of asphalt cement in Georgia for HMA. PG 76-22 is a polymer modified asphalt cement and is normally used for high traffic areas The Asphalt Institute recommends a transverse slope of between 1.5 to 3.0% on all pavement surfaces, and an even steeper slope of 3 to 6% on shoulders. Accordingly, what is the minimum slope for drainage? For efficient drainage, paved surfaces should have a minimum 1-percent slope. Turf or landscaped areas should have a minimum slope of 2 percent

In many cases a 4-inch thickness may be adequate, but 5 or even 6 inches of full-depth asphalt will assure you of a stronger, stable driveway under a wider range of climate and loads. As an option, some contractors use 6 to 8 inches of compacted aggregate, or gravel, as a base for 3 inches of asphalt pavement The overlay shall extend for a minimum length of 100 feet or 20 feet beyond the last cut at each end of the excavated area. The 1.75 inches depth of asphalt may be subtracted from the depth of the asphalt in the trench repair as long as the depth of repair matches or exceeds the depth of the existing asphalt. Asphalt QMS - 2016 i PREFACE This manual has been prepared as a practical guide for asphalt technicians in the construction and inspection of asphalt pavements. It is intended to serve as a basic introduction to asphalt construction for the new technician as well as a reference source to those with considerable experience The need for an asphalt layer is mainly dictated by operational and struc-tural considerations. From the operational standpoint, the asphalt surface provides a wearing course to prevent material loss or dislodging (e.g., Donovan and Tutumluer 2008, 2009; Tao et al. 2010), a waterproo

The minimum asphalt depth for a driveway is 2 inches, and homeowners often go with a depth of up to 6 inches to enhance stability and longevity. For 2-inch depth , you'll get 80 sq. ft. of coverage per to Depth of Exploration - 5 to 10 feet with minimum 5 to 10 feet below final subgrade elevation in cut areas - Suggest minimum 20% to 25% to be 10 feet Sunday, March 28, 2010. Subgrade Investigation - Hot Mix Asphalt 0.40 to 0.44 - Granular Base Course 0.12 to 0.14. When placing hot-mix asphalt (HMA), ensure that the mix temperature is a minimum of 290°F at the mid-depth of the mat behind the screed when the compaction process begins. The ideal mix temperature will vary slightly depending on the binder type used in the mix design, lift thickness, the time available for compaction and ambient conditions

The transition slope and notch depth in the existing asphalt or concrete pavement will be in accordance with INDOT Standard Drawings. minimum patch lengthand a 15-ft maximum contraction joint spacing should be between two contraction joints. For example, if a 20-ft panel is replaced, a D-1 joint should be installed at 10 ft. When you run buried electrical cable -- for example from a house to a garage or to a gazebo -- it has to be protected to prevent mechanical damage to the insulation. The National Electrical Code gives minimum burial depth recommendations and building codes specify local requirements that you must follow

The depth of cut shall be one and one-half inches (1-1/2) at the limit of work and shall be progressively decreased to zero (0) over the conform length. The minimum asphalt binder temperature shall be 290 degrees F, with a distributor tank temperature not to exceed 324 degrees F. The asphalt Asphalt mix in which the largest stone is no larger than three-quarters of an inch. It is usually #57 gradation. Base mixes are typically laid upon a stone base with a minimum depth of at least two inches compacted. Asphalt Binder. This is the asphalt layer positioned between the rock base layer or other types of aggregate and the driving. I'd like to know what the minimum snow depth should be for plowing with a Meyer ST 7.5 and avoid damaging asphalt or wearing out the asphalt sealer? Some of the driveways don't get a whole of sunlight on them so even 1 becomes ice if not removed. Still, I don't want to damage the asphalt • Commercial Driveways: The minimum depth for commercial driveways is 6 inches or 8 inches, depending on the municipal code covering the site. Commercial driveway aprons need to be at least 8 inches thick, and in many cases, the aprons will need to be as much as 10 inches in thickness

ASPHALT PAVING PART 1 minimum plant mixing, delivery, placement and compaction temperatures that will If necessary to obtain this result, the joints shall be cut back to the full depth of the previously laid course, painted with hot asphalt, and heated. All tack oil shall be applied prior to placing th For 25.0 mm HMA base, if compacted depth is > 6, place in two or more equal lifts, with no lift < 3 or > 6. • For 37.5 mm HMA base, if compacted depth is > 8, place in two or more equal lifts, with no lift < 4 or > 8. 41 Section 309: Superpave Asphalt Mix Design, HMA Base Course • 309.3 Construction - follows 409.3 fo In commercial pavement, the depth of asphalt can be as little as 1″ on a poorly paved parking lot, or more than 9″ on a municipal or state road. For our purposes here though, we can, and will assume the majority of parking lot asphalt projects are between 2″-4 in depth , and we'll assume the method being utilized is full depth saw.

Asphalt Pavement Construction Asphalt Institut

Hot-mix asphalt costs $40 to $80 per ton (2,000 pounds), and minimum orders are typically 2 tons. Bag of asphalt cost. A 50 lb. bag of cold-patch asphalt costs $8 to $20 and covers 5 to 7 square feet at a 1 depth. Cold-patch asphalt is the only DIY-friendly option that cures by compaction alone. Contractor using cold-mix asphalt for patching. have a minimum 6-ft. cutting width except for work areas less than 6 ft. wide; are self-propelled with enough power, traction, and stability to maintain an accurate depth of cut and slope; can cut in one continuous operation: 4 in. of asphalt concrete pavement, 1 in. of concrete pavement, o

Removal of Existing Asphalt Pavement before Patching . to determine proper depth of distressed area to be patchedConstruct patches wit. h a minimum size of 6.5 feet x 6.5 feet with at least 25 feet between patches. Care should be taken to ensure that longitudinal joint A. Initially cut asphalt concrete pavement with a pavement saw, hydrohammer, or pneumatic pavement cutter at the limits of the excavation and remove the pavement regardless of the thickness. After backfilling the excavation, saw cut asphalt concrete pavement to a minimum depth of 2 inches at a point not less than 9 inches outside the limits of th reduced minimum depth of trench raised mainline underdrain pipe. front edge of gutter intersect. under point where pavement and asphalt caps shall be compacted to density indicated in section over the filter cloth underdrain, no tack or prime coat shall be used on th

Asphalt Thickness - Richfield Blackto

ITEM 402.94 06 M - HEATER SCARIFICATION OF ASPHALT CONCRETE ITEM 618.94 06 M - RECYCLING AGENT Page 2 of 3 1/14/2004 pavement to a minimum depth of 25 mm. The temperature of this unit will be held at a minimum of 110º C and will not exceed 145º C A PG 52S-34 is intended for use where the average seven-day maximum pavement temperature is 52 degrees Celsius and the expected minimum temperature is -34 degrees Celsius, under standard traffic conditions. Parking lot mix types: Below are some recommendations on mix types that will help enhance the overall performance of the parking lots

AsphaltPro Magazine Best Practices for Asphalt

The only acceptable asphalt mix designs will be 50 gyrations ( < 0.3 million ESALs), 75 gyrations (0.3 to < 3.0 million ESALs), and 100 gyrations (3.0 to >30.0 million ESALs) mix designs. These new policies should be adopted on all new and existing projects as soon as practical withou Full depth reclamation of asphalt pavements using asphalt emulsions (AEFDR) is a process that recycles and rejuvenates the existing asphalt pavement surface, base, and, sometimes, the subgrade, providing an improved underlying structure for the new asphalt minimum of needed wearing course. And although FDR is a specific type of recycling. Minimum Thickness of Asphalt Concrete (mm) 75* 100 125 *For full depth asphalt concrete or emulsified asphalt pavements a minimum thickness of 100 mm applies. 2/12/16. Flexible Pavement Design Methods: Prepared by Rajesh Khadka, acem. 5 minimum of 1-1/2 inches from lane line to lane line or edge of pavement/lip of gutter and overlay with asphalt concrete. The 1-1/2 inch grind depth is a minimum. The grinding must produce a stable surface for new pavement material. A seal coat is not required. 14-3.01.C Roadways with pavement greater than 5 years old 14-3.01.A(1) Minor Roadway The Asphalt Institute has informational brochures that provide guidelines for thickness design. Murphy's experience and recommendations generally agree with the Institute guidelines. In general, Murphy recommends 4 inches of compacted hot mix asphalt on a full-depth driveway (hot mix asphalt placed directly on subgrade)

5 Thickness Of Asphalt Driveway How Thick Should It Be

Asphalt repair costs depend on the size, depth, and repair method. Minimum call-out fees of $100 to $250 apply to all asphalt repairs. Sealcoating the asphalt driveway after repairs gives a longer-lasting finish A. A seal coat of mixing type emulsion liquid asphalt meeting the requirements of SSPWC Section 203-3 shall be applied to asphalt concrete pavement. The emulsion shall be SS-1H and shall be applied at the rate of 0.1-gallon per square yard. CONTRACTOR shall spread sand and open to traffic for a minimum of 24 hours As a rule of thumb however, the depth should be at least 4 times the dimension of the largest nominal size in the mix for surface course (i.e. 40mm depth for 10mm asphalt concrete); and at least 2.5 times the dimension of the largest aggregate size in the mix for base and binder courses (i.e. 50mm for 20mm asphalt concrete) the existing pavement and underlying granular material to a minimum depth of 300 mm, incorporating the corrective aggregate into the mix if required, adding expanded asphalt in a controlled manner, and producing a uniform mix

It is recommended that failed asphalt in front of trash dumpsters be replaced with concrete in order to support the weight of the front wheels of the trash truck. The concrete should be reinforced with fiber mesh or rebar and should be a minimum depth of six inches. Once crack sealing and asphalt repair have taken place what needs to be done next Recycled Road Base 1 1/2″ Minus. Compactable Base Material manufactured from Concrete, Dirt, and Asphalt. Subgrade material for under asphalt, concrete, driveways, Patios, Pavers, etc. For best coverage spread and compact 3″ to 6″ deep compacting in 2″ - 3″ lifts. Quantity needed could vary based on varying levels of compaction. Warning: you have entered a thickness that is less than the minimum recommended depth of 3 inches. Description of product - Desert Rose is a multi-colored crushed Utah rock. It has a purple/rose base coloring with tan, brown, white and other earth toned highlights. Pairs well with these products - Mexican Beach Pebble, Southtown Tan Crushed. based on the specified partial recycling depth is indicated in the following table: Total Pavement Slab Area required for 450 lbs of s ample based on PDR depth PDR depth (ft) .25 .30 .35 .40 Minimum Slab Area (sf) 14 12 10 8 Only the portion of the core representing the specified depth of the PDR shall be used

Guide to Installing Asphalt Driveways - The Spruc

these guidelines provide a minimum depth for the hydrologic performance of the pervous pavement. the structural capacity of pavement sections when subject to vehicular loads depends on several factors and must be designed by a licensed professional engineer. 2. longitudinal slope, 0 to 5% max. for pervious asphalt, 6% max The minimum allowable slope of any asphalt pavement shall be 2%. PART 2: EXECUTION . Subgrade shall be excavated to a minimum depth of 10½. 2. Install minimum 7 new flex-base (type 'A') material. 3. Pave with a compacted 2 minimum type 'B' HMAC base course The tire and vehicle test center's 600-foot long asphalt braking lane was wetted by a watering system that maintained between 0.05-0.06 of water depth above the peaks of the asphalt's aggregate (this means that you could lay a Roosevelt dime on the road, and the water would flow around the coin, but not over it) The general guidelines for the porous asphalt pavement design are: Consider the location for porous pavements early in the site design process. Soil infiltration rates of 0.1 to 10 inches/hour work best. Minimum depth to bedrock or seasonal high water should be greater than two feet. The bottom of the infiltration bed should be flat to maximize. Current Full Depth Resurfacing Limitations •Current specs and drop-off requirements limit the depth for a single lift of asphalt. •5.5 maximum resurfacing depth in an area with FC-12.5. •4.0 SP-19. & 1.5 FC-12.5 •Up to 6.25 maximum depth in an area with FC-5 (if only one lane)

Milling also produces a rough, grooved surface, which will increase the existing pavement surface area when compared to an ungrooved surface. The surface area increase is dependent on the type, number, condition and spacing of cutting drum teeth but is typically in the range of 20 to 30 percent, which requires a corresponding increase in tack coat (20 to 30 percent more) when compared to an. Specific requirements for minimum depth of subgrade compaction for both cohesive and cohesionless soils for road designs are de scribed in Chapter 9 of this FM the typical minimum full-depth design will require a 5-inch asphalt layer. For moderate duty traffic (average daily traffic from 700 to 3,000 and primarily passenger vehicles with less than 5% single unit trucks and less than 3% combination trucks) and poor subgrade (typical in Illinois) Asphalt Pavement. While recycled asphalt pavement was not reported separately in these data, generation of inert solid waste, which consists of concrete, asphalt, dirt, brick and other rubble, was conservatively estimated at 8.2 million tons. The estimated recycling rate for inert solid wastes was 57 percent; the remainder was disposed of

course on 1 compacted lift minimum 9.5 mm Superpave hot mix asphalt binder course. 6 thick minimum , MDOT 703.06 Type B, compacted granular base. Recommended thicknesses are shown. If a different thickness is required please specify: _____. 3. Overlay parking areas with a 1 compacted lift of MDOT 50 gyration 9.5 mm/D surface mix Pavement keycutting shall consist of cold planing asphalt concrete pavement adjacent to the lip of gutters and across street intersections, as shown on the Plans. Cold planing for pavement keycutting shall be to a minimum depth of one and one-half inches (1-1/2) adjacent to the gutter lip and shall b

Minimum HPDE Brake Pad Thickness - Toyota GR86, 86, FR-S

Full Depth Reclamation (FDR) or Hot Mix Asphalt (HMA) overlays. The product of a CP operation is a crushed, somewhat gap-graded reclaimed asphalt pave-ment (RAP) which acts like an asphalt coated granular material. The RAP can be used for hot recycling, Cold Central Plant Recycling (CCPR) or as a granular aggregate Minimum asphalt thickness = 150 mm* Maximum asphalt thickness = 250 mm** For deep strength asphalt pavements replace the bottom 20-50 mm of asphalt with 100-150 mm of subbase material respectively. * If cement stabilized crushed rock is used in the subbase of a deep strength asphalt pavement the depth of asphalt should be a minimum

MINIMUM SEVERITY LEVEL REQUIRING FULL-DEPTH REPAIR2 Low Low Moderate Moderate (with faulting 6 mm [0.25 in]) Moderate (with faulting 6 mm [0.25 in]) Hi h with faultin 12 mm 0.5 in Low or asphalt overlays. However, the same design con- siderations apply for either situation (4, 10) Full Depth Reclamation (FDR) Keys to Success Stabilization Considerations Emulsion/Foamed Asphalt Stabilization -Mill to 3- material (95% passing 2) -Combination of Asphalt Pavement and Aggregate Base -Emulsion addition rate of 3-6% by weight -Foamed asphalt addition rate of 2-4% -Lower stiffness, higher flexibilit The asphalt required by these Specifications shall conform to the requirements of The Asphalt Institute for the type and grade shown below: Asphalt for Seal Coating CRS-2 or CRS-2P Article 2.3 Cover Aggregate A. General Cover aggregate shall consist of crushed gravel and shall be sound, durable, fre

Virginia Asphalt Association

The Asphalt Pavement Association of Oregon is a non-profit trade association representing contractors and associated firms. APAO was formed in 1969 by a small group of asphalt paving contractors to develop improved specifications and products. The Association and its members are dedicated to promoting asphalt pavements by developing pro A. Reclaim present surface material by pulverizing the existing roadway surface to a minimum depth of 4 inches or the depth specified by the Engineer for the full length and width of the designated roadway. B. Spread the imported aggregate as uniformly as possible on center 15 feet of roadway at th 5.1 Control Dimensions 5-1 5.1.1 Edge Clearance 5-1 5.1.2 Driveway Angle 5-1 5.1.3 Radius of Curvature 5-2 5.1.4 Entrance Width 5- Remove concrete to a depth of ¼ inch. Provide a surface relief of at most ¼ inch. Provide a 5/32 inch grade tolerance. Cold milling equipment must have the following features: 3 or 4 riding tracks. - 2 - REVISION OF SECTION 202. REMOVAL OF ASPHALT MAT (PLANING) (SPECIAL (h) Micro Milling Asphalt Pavement (0.5-1 in. depth) (i) Micro Milling Asphalt Pavement (1-2 in. depth) Asphalt mixes for filling depressions and potholes, and for wedging manholes, valve boxes, inlets, temporary tie-ins and other structures will be measured and paid as specified in 106.04

» Parking Lot DesignSurface Dressing SpecificationsCottonwood Gravel 1 1/2&quot; | Asphalt Materials

The minimum depth of this layer is usually 9 inches. 6. A 1-2-inch thick layer of 0.5-inch stone should be placed over the reservoir or base course, and manually graded to plan specifications. 7. Add the porous asphalt layer (2-4 inches thick), but only when the air temperature is above Asphalt used in porous asphalt concrete ranges from a. 3.1.2. Cores are to be cut for the full depth of the asphalt pavement. Sample aggregatebase to the depth specified for the full depth reclamation project. T 522 - 2 FLH 3.1.3. Crush cores and sieve to obtain materials that meet the gradation shown in Table 1. Select a minimum of three emulsified or foamed asphalt contents in either 0.5% or 1.0 The minimum depth of rutting is up to the discretion of the project manager, engineer, or owner. Stabilizing the area will protect the investment and aid in the longevity of the asphalt. A smart reputable contractor should always communicate the discovery of these areas with the owner. Phone: 1-414-425-5353 For full-depth designs, the total required asphalt thickness can be composed of a 1.5 inch (38 mm) Item 441 or 442 surface course on an Item 301 or 302 base course A minimum 4 in. (102 mm) reinforced concrete or asphalt base should be used. A subbase of coarse aggregate (gravel) should be used and compacted to a minimum thickness of 4 in. (102 mm) using mechanical compaction or vibration. Alternatively, a minimum full depth 8 in. (203 mm) of concrete or asphalt can be used as the base course and subbase. Fo