bituminous concrete,hot plant mix,asphalt concrete, blacktop or Superpave. Hot mix asphalt is composed of aggregate bound together into a solid mass by asphalt cement. The aggregates total ninety-three (93) to ninety-seven (97) percent by weight of the total mixture and are mixed with three (3) to seven (7) percent asphalt cement.

In general, HMA is made up of 3 materials: aggregate, asphalt binder and air. Typically, HMA is described by volume so it is important to know how these 3 materials relate to one another volumetrically. The animation in Figure 1 shows this both in a close-up sketch of in-place HMA (left) and a volume diagram (right) that is similar to volume diagrams seen in the geotechnical arena. Further definitions of these terms can be found below.

= effective asphalt content, percent by total weight of mixture. P b = asphalt, percent by total weight of mixture. P ba = absorbed asphalt, percent by weight of aggregate. P s = aggregate, percent by total weight of mixture. Calculation using data from Table 1 and section 3.5. P be = 6.96 - (1.03 100) X 93.04 0.9 6.00 3.7.

•Prepare 1000 g of mix, cool at room temp for 24 ± 2 hrs •Bring oil bath to between 325 and 350oF •Obtain a 200 g representative sample of the mix •Fill 2000 mL beaker about halfway with distilled water and heat to boiling •Add mix sample to beaker, maintain boil for 10 m ± 30 s •Remove beaker and skim asphalt from water surface

What is the weight of asphalt?

B1 = % asphalt content at maximum unit weight. B2 = % asphalt content at maximum stability. B3 = % asphalt content at specified percent air voids in the total mix. 11.9 EVALUATION AND ADJUSTMENT OF MIX DESIGN The overall objectiveof the mix design is to determine an optimum blend of different

It is the portion of the total asphalt content that remains as a coating on the outside of the aggregate particles, and is the asphalt content on which service performance of an asphalt paving mixture depends. The formula is: be b ba P = P - ( s P 100) P (Eq. 5, Figure 1) Where: Pbe = effective asphalt content, percent by total weight of mixture.

Specializing in New & Used Asphalt Plants, Sales, Parts, Service, Repairs, DEQ and Mix Design Compliance and Complete Consulting Services. USEFUL NOTES & FORMULAS GENERAL. A plant loses about 3% of its production rate per 1000 feet of elevation due to the thinning of the air. Plants are designed to remove 5% moisture.

Hot mix asphalt (HMA) pavement refers to the bound layers of a flexible pavement structure. Asphalt pavement material is a precisely engineered product composed of about 95 percent stone, sand, and gravel by weight, and about 5 percent asphalt cement, a petroleum product. Asphalt cement acts as the glue to hold the pavement together.

Pb = Asphalt content % by total mass of mix 2) Volume of Air Voids in Marshall’s ???????????????????????? (????????????????) = ????????????????????????× (????????????????????????−????????????????????????) ???????????????????????? Va = Volume of air voids . Gmm = Max Specific Gravity of mix . Gmb = Bulk gravity of mix

Free online asphalt calculator to help you estimate how much asphalt you need for your construction project - road, private driveway, car park, etc. Output in weight and volume: tons, tonnes, cubic yards, cubic meters, etc. Basic information about asphalt (tarmac) and tips on calculating how much you need.

Hot mix asphalt (HMA) paving materials are a mixture of size-graded, high quality aggregate (which can include reclaimed asphalt pavement [RAP]), and liquid asphalt cement, which is heated and mixed in measured quantities to produce HMA. Aggregate and RAP (if used) constitute over 92 percent by weight of the total mixture.

1. All aggregate percentages are based on the total weight of the aggregate. 2. The asphalt content is based on the total weight of the mix. When using slag aggregates in the mix, the asphalt content shall be increased accordingly, a minimum of 25 percent for an all slag mix. 3. Use a PG binder appropriate for the project location as specified ...

WMAC - Warm Mix Asphalt Concrete 00745.02 Definitions: Asphalt Concrete Pavement - Uniformly coated mixture of asphalt cement, graded Aggregate, and additives as required. The use of ACP in this section refers to either hot mix or warm mix asphalt concrete Hot Mix Asphalt Concrete - A hot plant mixed, uniformly coated mixture of asphalt cement ...

The contractor may submit a new job mix formula on Form CEM-3511 with a new Form CEM-3512, “Contractor Hot Mix Asphalt Design Data,” or the contractor may adjust the job mix formula on Form CEM-3511 with allowable adjustments specified in Section 39-2.01A(4)(b), “Job Mix Formula Verification,” of the Standard Specifications.

Samples of asphalt mixtures were prepared at four different asphalt contents by weight of asphalt mix mass (5%, 5.5%, 6%, and 6.5%), with three replications per asphalt content. For base asphalt cement and each modifier concentration, one asphalt cement content was chosen, which met the requirement of Superpave mix design 4% air voids.

viscosity criteria stated by the Asphalt Institute in MS-2 U). For each mix. the same mix/compaction temperatures were used for both the Marshall and SUPERP A VETM Level I mix design procedures. Mixing temperatures were selected at a binder viscosity range of 150-190 centiswkes while the

(1) A proposed hot mix asphalt mix design prepared in accordance with Colorado Procedure 52, including a proposed job-mix gradation for each mixture required by the Contract which shall be wholly within the Master Range Table in subsection 703.04 before the tolerances shown in Section 401 are applied. The weight of lime shall be included in the

Asphalt Surface Treatment, the method of measurement of the ACHM placed shall be the same as for ACHM Base Course (See . Section 405. of this Manual). A note stating that the material was used in lieu of "Asphalt Surface Treatment" should be placed in the "comments" portion of each report. The total weight of the mix placed shall be used

Colorado Procedure 52, including a proposed job‑mix gradation for each mixture required by the Contract which shall be wholly within the Master Range Table in section 703 before the tolerances shown in section 401 are applied. The weight of lime shall be included in the total weight of the material passing the 75 µm (No. 200) sieve.

The mix is placed in the mould and compacted by a rammer with about 75 blows on each side. The weight of hammer is 4.54 kg and height of fall is 45.7 cm The compacting temperature may be about 135 oC for 60/70 grade bitumen. The compacted specimen should have a thickness of 63.5 ± 3.0mm.

Asphalt impregnated felt paper None 15 pound paper (0.2 lb m /ft 2 , 1 kg/m 2 ) 30 pound paper (0.3 lb m /ft 2 , 1.5 kg/m 2 ) 45 pound paper (0.5 lb m /ft 2 , 2.4 kg/m 2 ) 1 lb m /ft 2 = 4.88 kg/m 2

ba = Percent Absorbed Asphalt Binder in Total Mix P s = Percent Aggregate in Total ... for each is as follows: Aggregate % of Total Aggregate G sb 2.650 2.661 2.675 2 ...

Section 400—Hot Mix Asphaltic Concrete Construction Page 6 400.3.02 Equipment Hot mix asphaltic concrete plants that produce mix for Department use are governed by Quality Assurance for Hot Mix Asphaltic Concrete Plants in Georgia, Laboratory Standard Operating Procedure No. 27.

COMPACTION OF HOT MIX ASPHALT CONCRETE BY F. N. Finn and J. A. Epps RESEARCH REPORT 214-21 Engineering, Economy and Energy Considerations in Design, Construction and Materials 2-9-74-214 Sponsored by State Department of Highways and Public Transportation August 1980 Texas Transportation Institute

Superpave Mix Design 43 Estimated Volumetric at 4% AV P be = P bi – 0.4 x (4-V a) P be: estimated design asphalt content P bi: asphalt content used in trial blends VMA e = VMA i + C x (4-V a) VMA e: estimated VMA at design asphalt content VMA i: initial VMA of trial blend C= constant: 0.1 when air voids < 4% and 0.2 when air voids > 4%

Oct 31, 2019 · contractor's mix design proposal, for combined bulk specific gravity and/or combined water absorption up to a maximum of 3.0 percent, but meets the other requirements of Table 406-4 may be further considered for acceptance by the Engineer if: a) the total estimated cost of all asphaltic concrete components, using the mix design unit weight ...

traffic (vehicular and commercial) per lane (ADT/Lane): ADT/Lane Minimum AWI <100 None 100 - 2000 220 >2000 260 D: Alternative Mixes These guidelines provide for the selection of Hot Mixed Asphalt (HMA) and application rates utilizing the Superpave mix design system along with the Marshall Mix design system. The

on the total weight of the mix. 2. The “F” designation in the mix type indicates that high friction coarse aggregates are required. 3. When slag aggregates are used in the mix, the asphalt content shall be increased accordingly5 minimum 25 percent for an all slag mix. 4. The asphalt content job mix tolerance of ±0.4% shall not apply to ...

The job mix formula shall indicate a single rate of hydrated lime additive, when used. The job mix formula rate of hydrated lime additive shall not be less than 1.5 percent by weight (mass) of total mixture. The job mix formula shall indicate the optimum mixing temperature. The job mix formula limits for mix temperature will be ±25°F (±14°C)