Advantages. Disadvantages. Unlike penetration depth, viscosity is a fundamental engineering parameter. The principal grading (done at 25° C (77° F)) may not accurately reflect low-temperature asphalt binder rheology. Test temperatures correlate well with: - 25° C (77° F) – average pavement temp. - 60° C (140° F) – high pavement temp.
Due to difference in chemical composition and physical properties, the incorporation of LDPE and HDPE aggregates in asphalt concrete changed its properties and behavior. The lower specific gravity and absorption values of these synthetic aggregates makes the asphalt samples less dense than control group.
There is no specification for bulk specific gravity, but it is used to calculate other specified parameters such as air voids, VMA and VFA. Typical Values. Typical values for bulk specific gravity range from 2.200 to …
Detailed of both fillers was done through specific gravity, plasticity index, methylene blue v German filler values, Scanning Electron Microscopy (SEM), X tests. Thereafter, asphalt concrete mixes containing both fillers were designed using Marshall mix design procedure and their optimum asphalt contents were determined.
Received of Asphalt Cement (AC), By Materials Division Refinery Units PG 64-22 PG 64-220K PG 64-28 PG 70-22 PG 70-280K PG 70-28 PG 76-22 PG 76-280K AC-15.STR ... Average Specific Gravity to be used on all ODOT projects Glen Oliver from January 1, 2002, thru December 31, 2002. Liquid Asphalt Reynolds Toney, P.E.
material (asphalt cement) to form a pavement course or to be used for other specified purposes, in accordance with the details shown on the project plans and the requirements of ... Specific Gravity (1) Arizona Test Method 251 2.350 - 2.850 Combined Water Absorption (1) Arizona Test Method 251 0 - 2.5% Sand Equivalent (1) AASHTO T 176 (After
Asphalt Core Testing ASTM. These two tests cover the process of getting the bulk-specific gravity, density, and thickness of compacted asphalt core sections. The results of these tests will be used to find the unit weight of each compacted asphalt mixture and can also be used with ASTM D3203 to determine the percent of air voids in an …
Effective specific gravity of asphalt cement = 1.08. a. Compute the percent voids filled with air, the total voids in the mineral aggregate (VMA), and percent voids filled with asphalt. Assume that you have 1 ft 3 of asphalt concrete. b. To obtain 300 lb of this material, what volume of fine aggregate will be required?
The theoretical maximum specific gravity (often referred to as theoretical maximum density and thus abbreviated TMD) is the HMA density excluding air voids. Thus, theoretically, if all the air voids were eliminated from an HMA sample, the combined density of the remaining aggregate and asphalt binder would be the TMD – often referred to as ...
Bulk specific gravity (G ). Theoretical maximum specific gravity (TMD, G mm). These densities are then used to calculate the volumetric parameters of the HMA. Measured void expressions are usually: ... Mix Design Methods for Asphalt Concrete and Other Hot-Mix Types. Manual Series No. 2 (MS-2). Asphalt Institute.
properties are specific gravity measurements of the mixture and the aggregate in the mixture. In essence, the specific gravity measurements are conversion factors which …
3.2—Specific gravity (relative density) 3.2.1—Definition 3.2.2—Determination of specific gravity 3.2.3—Significance of specific gravity 3.2.4—Absolute volume calculations …
Consider two asphalt concrete mixtures, both with an air void content of 4.0% and an asphalt binder content of 12.0% by volume. One mixture is made with a limestone …
A compacted asphalt concrete specimen has a mass in air of 1200 g and an apparent mass in water of 650 g. If the maximum specific gravity of the mix is 2.35, what is the air void content of the specimen? CIVL 3137 15
•Bulk specific gravity (SSD): Used to determine the "solid volume" (absolute volume) of a material going into concrete It is determined b yygg submerging the material in water for 24 hours in order to fill any permeable voids 6 Specific Gravity Water: Specific Gravity = 1.00 Stone: Specific Gravity = 2.70 Same Volume, but 2.70 Times More Mass
What might cause surface cracking on newly placed asphalt concrete? The cracking occurred during the breakdown rolling and finish rolling. ... This value is based on the asphalt mixture's maximum specific gravity – also known as the Rice value or G mm in Superpave. The maximum unit weight is determined by multiplying the Rice value by …
If the maximum specific gravity of the mixture is 2.41 and the bulk specific gravity is 2.35, determine: Mix Composition by Material Specific Gravity material weight of total mix Asphalt cement 6.4 1.02 Coarse aggregate 2.51 52.4 Fine aggregate 2.74 33.5 Mineral filler 2.69 7.7 (a) The bulk specific gravity of aggregates in the paving mixture b ...
Determine the specific gravity of the asphalt cement. 2.3. Calculate the Bulk Specific Gravity of the aggregate combination in the paving mixture. (Gsb) 2.4. Measure the Maximum Specific Gravity of the loose paving mixture. (KT-39) (Gmm) 2.5. Measure the Bulk Specific Gravity of the compacted paving mixture. (KT-15) (Gmb) 2.6.
First and most important, it is the asphalt content by volume and not by weight that dictates performance, and asphalt content by total mix weight is a function of both asphalt content by volume and aggregate specific gravity. Consider two asphalt concrete mixtures, both with an air void content of 4.0% and an asphalt binder content of 12.0% by ...
3.2—Specific gravity (relative density) 3.2.1—Definition 3.2.2—Determination of specific gravity 3.2.3—Significance of specific gravity 3.2.4—Absolute volume calculations 3.3—Absorption and surface moisture 3.3.1—Mixing water and water-cementitious material ratio 3.3.2—Absorption and total moisture content 3.3.3—Surface ...
SUMMARY OF TEST METHOD. This test method covers proper sampling, transporting, trimming, weighing, and calculations involving core samples taken from asphalt pavement. Asphalt pavement compaction is determined from the average maximum specific gravity (MSG) of the asphalt mixture based on the daily average of the contractor's field lab …
A compacted asphalt concrete specimen contains 5% asphalt binder (specific gravity=1.023) by weight of total mix, and aggregate with a specific gravity of 2.755. The bulk density of the specimen is 2.441 Mg/m3. Ignoring absorption, compute VTM, …
The fine aggregate was siliceous sand in all designed asphalt concrete mixes that has had a specific gravity of 2.673. The design gradation of aggregate used to produce wearing surface asphalt course was 4 C gradation. The properties of the aggregates are summarized in Table 1.
Specific Gravity of Asphalt. Several AASHTO and ASTM standards govern the measurement of the specific gravity of asphalt, also known as theoretical maximum specific gravity, or simply the Rice Test. Test …
1.1 The Oregon Standard Specifications for Asphalt Concrete 00744.13, 00745.13(a) and 00735.13 require the Contractor to develop the mix designs for ACP, Emulsified Asphalt Concrete (EAC), ... AASHTO T 84: Specific Gravity and Absorption of Fine Aggregate AASHTO T 85: Specific Gravity and Absorption of Coarse Aggregate
The theoretical maximum specific gravity of asphalt concrete (Gmm) is an imperative volumetric parameter for asphalt mix design. Many studies in the literature …
As noted above, specific gravity and density values are determined using the ASTM D2041/AASHTO T 209 theoretical method (Rice test) for the loose asphalt material and ASTM D2726/AASHTO T 166 to determine the bulk specific gravity of compacted specimens. There is also a need to describe various types of air void contents.
3. Determine the specific gravity of the aggregate combination and asphalt cement. 4. Prepare the trial specimens with varying asphalt contents. 5. Determine the specific gravity of each compacted specimen. 6. Perform stability tests on the specimens. 7. Calculate the percentage of voids, and percent voids filled with Bitumen in each …