concrete surface course. This course shall be composed of a mixture of aggregates and, if necessary, mineral filler and asphalt cement to produce the desired stability as hereinafter described, properly laid upon a prepared base in accordance with these Specifications and in conformity with the lines, grade, thickness and typical cross section ...

The wearing course is the upper layer in roadway, airfield, and dockyard construction. The term 'surface course' is sometimes used, however this term is slightly different as it can be used to describe very thin surface layers such as chip seal.In rigid pavements the upper layer is a portland cement concrete slab. In flexible pavements, the upper layer consists of asphalt concrete, that is a ...

bituminous concrete,hot plant mix,asphalt concrete, blacktop or Superpave. ... Asphalt pavements are constructed of one or more courses of hot mix asphalt placed directly on the subgrade or on a subbase. ... asphalt over an existing hard surface pavement. This is the

SECTION 1400 ASPHALTIC CONCRETE SURFACE AND BASE . 1401 SCOPE. This section covers the requirements for all labor, equipment, materials and quality of work for the construction of asphalt concrete base and/or asphalt concrete surface. The contractor shall cooperate with other contractors, public utility companies and other parties involved in

While there are an infinite number of questions that can be asked, we compiled a list of those questions that have been directed to us the most. These FAQs are categorized into subject areas listed in the contents drop-down box below. We tried to keep both the questions and answers concise. Additional information is referenced … Continue reading Asphalt Pavement Construction

Asphalt Treated Base Class I 0.34 4 Bituminous Treated Aggregate Base 0.23 6 Asphalt Treated Base Class II 0.26 4 Cold‐Laid Bituminous Concrete Base 0.23 6 Cement Treated Granular (Aggregate) Base. 0.20 6 Soil‐Cement Base 0.15 6 Crushed (Graded) Stone Base 0.14 6 Macadam Stone Base 0.12 6

• Asphalt pavements with 6+ percent of cracking in or outside the wheel paths. • Widespread rutting > 0.25 inch deep. • Raveling surface. • Bleeding pavement. • Areas where layer debonding or subsurface stripping is suspected. (Verify with coring and forensics.) • Concrete single slab with moderate or severe

ASPHALT CONCRETE SURFACE COURSE C O N T E N T S Section Description 22 SCOPE OF WORK 23 SPECIFICATIONS 23.01 State Specifications 23.02 Smoothness 24 CONSTRUCTION METHODS 24.01 Compaction Requirements 24.02 Asphaltic Cement 24.03 Prime Coat 24.04 Tack Coat 24.05 Armor Coat 24.06 Bituminous Base Course and Surface Course

Dense asphalt concrete is often used as the 'basic' surface layer. 2. Asphalt Concrete for very thin layers (AC-TL) "Asphalt for surface courses with a thickness of 20 mm to 30 mm, in which the aggregate particles are generally gap-graded to form a stone to stone contact and to provide an open surface texture".

Asphalt concrete (AC) surface courses. Asphalt concrete (ac) surface course are described by characteristics such as target composition, recycled content (maximum) and colour. An example use may be within an asphalt paving maintenance system.

asphalt or concrete pavement alternatives. At present, there is no comprehensive procedure to engineer a structural layer of asphalt surface course over a concrete surface course layer of JPCP or CRCP. Research is under way to provide guidelines for engineering and construction of composite pavements.

Asphalt concrete base (ACB), also called asphalt treated base (ATB), is a dense-graded HMA with a larger nominal maximum aggregate size (1 inch) intended for use as a base course or binder course (see Figure 1). In addition to site paving benefits, ACB can be advantageous because it can provide: A waterproof barrier to prevent fines infiltration into the subgrade and pavement structure.

Item 448 Asphalt Concrete Surface Course Type 1 PG64-22, Item 448 Asphalt Concrete Intermediate Course Type 2, PG64-28, and Item 304 respectively. The final one (1) inch thickness of Item 448 surface course asphalt pavement shall be constructed at the same time that the adjacent street is paved. Patching asphalt

Asphalt concrete base (ACB), also called asphalt treated base (ATB), is a dense-graded HMA with a larger nominal maximum aggregate size (1 inch) intended for use as a base course or binder course (see Figure 1). In addition to site paving benefits, ACB …

asphalt concrete or any surface course with a polymer modified asphalt binder after November 1, regardless of pavement or air temperature. 401.07 Notification. Notify the Engineer at least 24 hours before starting paving on a project. After starting paving, if paving operations are stopped for 1

Our asphalt ranges includes: Surface courses. The surface course is the layer that is in direct contact with the traffic load and its smooth surface improves traction and reduces skidding. The surface layer should be tough enough to prevent distortion from traffic as well as prevent excessive water getting into the layers beneath.

Asphalt Concrete Surface Course, Type S9.5X 0.44 Asphalt Concrete Intermediate Course, Type I19.0C 0.44 Asphalt Concrete Base Course, Type B25.0C 0.30 Other Materials: Permeable Asphalt Drainage Course (PADC) 0.14 Aggregate Base Course (ABC) 0.14 Cement Treated Base Course (CTBC) 0.23 Cracked and Seated Concrete 0.28*

Asphalt leveling course is defined as a layer of asphaltic concrete pavement of varying thickness spread on an existing pavement to compensate for irregularities prior to placing the surface or wearing course. As you may or may not know, an asphalt pavement section or structure is made up of multiple and different asphalt layers (lifts or courses).

Asphalt Concrete An asphalt mixture consisting of continuous graded aggregate, filler aggregate and bituminous binder proportioned to produce a dense and impermeable surfacing. Asphalt Surfacing A porous friction course, surface course, or a combination of these, and a binder course. Asphaltic Concrete Alternative name for 'Asphalt Concrete'.

The Asphalt Concrete Surface Course completed and accepted under this item shall be paid for at the contract unit price for the actual tons measured. The unit bid prices shall include all materials, labor, equipment, and overhead to complete the work within the scope of these

2.02 ASPHALT CONCRETE A. TRAIL SURFACE 3/8" AGGREGATE – Aggregate shall b e Type Class B as shown on Drawings, conforming to Section 9-03.8 of the WSDOT-APWA. Asphalt binder shall be paving asphalt, Grade AR-4000, and shall comply with Section 9-02.1 of WSDOT-APWA. Asphalt concrete mixing and proportioning shall comply with Section 9-03.8 of

406.3 Base Courses. Asphalt concrete base courses provide the majority of the structural capacity in most flexible pavement buildups. All asphalt concrete base courses should be specified in 0.5-inch (10 mm) increments. 406.3.1 Item 301 Asphalt Concrete Base, PG64-22. This item is to be used in conjunction with both a surface and intermediate ...

SM-9.5A surface mixes can be considered the desired surface mix and are recommended for most final surface applications. VDOT "Standard" Intermediate Mix. The intermediate mix, sometimes called binder course, consists of one or more lifts of structural asphalt concrete placed below the surface layer.

4.2 Surface Course Materials 49 4.3 Binder Course Materials 58 4.4 Base Materials 59 Tables 1a. Typical Service Life for Asphalt Surfacing 05 1b Surface Course Attributes 06 1c. Site Classification – 40mmph or more 09 1d. Site Classification – Less than 40mph 13 1e.

Asphalt Concrete Hot Mix Surface Course (1/2" [12.5 mm]) or (3/8" [9.5 mm]), conforming to Section 407, may be used in lieu of an asphalt surface treatment and will be considered to be equivalent construction when furnished according to the following minimum substitution rate: Shoulders Roadways

Recycled asphalt concrete containing 40% RAP could be used as surface course in airport pavement as it exhibited similar performance as control mixture both from the laboratory and experimental pavement test results. On the contrary, recycled asphalt concrete containing 70% RAP was not recommended as its fatigue property was much poorer ...

The top surface layer of an asphalt pavement, usually less than 1 in. thick, to improve skid resistance and smoothness. Select one: a. Surface course b. Lift (mat) c. Friction course d. Leveling course

Porous asphalt concrete (PAC) surface courses. Porous asphalt concrete (pa) surface course are described by characteristics such as target composition, colour and slip and skid resistance. An example use may be within a porous asphalt concrete sports paving system.

when an unacceptable lot is overlaid, the overlay shall be of the surface course mixture specified for that lot and shall be a minimum of 1.5 inch thick if that mixture is hot mix asphalt surface course mix i-5 and 2 inches thick if that mixture is hot mix asphalt surface course mix i-4 or mix i-4 hd.

These include hot rolled asphalt, asphalt concrete, soft asphalt, porous asphalt and NatraTex– to name just a few. NatraTex As A Surface Course. NatraTex is an asphalt surface course that is created by mixing natural aggregates with a clear binder. When applied to different levels of thickness, NatraTex products can be used as a surface ...

Asphalt concrete shall conform to Section 39 of the Caltrans Standard Specifications and these City Standard Specifications. 39-1.01 Description. -Asphalt concrete is designated as Type A, Type ... Type B shall be used for the base lift course and for the surface lift course. Should

Rev. 12/14/07 Hot-Mix Asphalt Binder & Surface Course Sheet 4 of 14 8. PLACING PRIME ON EXISTING PCC, BRICK OR HMA BASES (Art. 406.05(b)) Traffic will not be allowed on the primed surfaces of multi -lane pavements and the traffic control shall be according to Article 701. 18(e)(2).

However, through more European alignment, Macadams and Asphalts have been brought under one umbrella term; Asphalt Concrete. So, for example, what used to be known as a 20mm Dense Bituminous Macadam (DBM) is now termed an AC20 (Asphalt Concrete in 20mm). SMA and HRA are almost always used as a Surface Course layer of the construction, but ...

Asphalt concrete base (ACB), also called asphalt treated base (ATB), is a dense-graded HMA with a larger nominal maximum aggregate size (1 inch) intended for use as a base course or binder course (see Figure 1). In addition to site paving benefits, ACB can be advantageous because it can provide:

Step 5: Binder and Surface Course . Once the sub base is laid and any soft areas are identified and repaired, it is time to add the binder. The binder layer is large aggregate mixed with oil, making it very strong and durable. The binder layer can be thought of as the strength of any new asphalt surface. Step 6: Install New Asphalt Surface