Concrete and asphalt pavements are not only made of different materials, but they also carry traffic loads in entirely different ways This means that the thickness design procedures for concrete and asphalt pavements are also different The structural number concept has, however, been used to estimate concrete and asphalt pavement sections
WORKSHEET FOR SUPERPAVE ASPHALT CONCRETE MIX DESIGN Project: Date: , Testing reported by: English Metric SUMMARY OF THE PROPOSED JOB-MIX-FORMULA GRADATION TARGET VALUES AND ALLOWABLE DEVIATIONS SPECIFIC GRAVITY AND ABSORPTION Sieve Sizes Formula , Sand Equivalent AASHTO T 176, Alt method #2, reference method Durability index .
Use approved hot mix asphalt concrete mixtures that meet the following requirements: , Obtain local sand for use in asphalt mixtures from a source approved by the Department , Ensure sand is free of clay lumps, as determined by AASHTO T 112, and has a sand equivalent value exceeding 25%, as determined by GDT 63 B Fabrication 1 Design .
ASPHALT CONCRETE PAVEMENT PART 1 - GENERAL 11 Summary , ASTM D2419, and Equivalent Value of Soils and Fine Aggregate ASTM D2489, Degree of Particle Coating of Bituminous- , asphalt cement content exceeds the allowable tolerance of +03 percent from the approved mix design target value, the
DEPARTMENT OF TRANSPORTATION , Use approved hot mix asphalt concrete mixtures that meet the following requirements: , other organic matter Ensure sand is free of clay lumps, as determined by AASHTO T 112, and has a sand equivalent value exceeding 25%, as determined by GDT 63 B Fabrication 1 Design procedures: For all Superpave and 4 .
Asphalt concrete is 100% recyclable and is the most widely reused construction material in the world Very little asphalt concrete — less than 1 percent, according to a survey by the Federal Highway Administration and the National Asphalt Pavement Association conducted annually since 2009 — is actually disposed of in landfills
1 a Superpave Asphaltic Concrete is a Contractor-designed mix b The Contractor shall be required to define properties using a gyratory , Particles and Sand Equivalent of the aggregate blend , b In recycled asphaltic concrete mixtures, the allowable percent of RAP will be as shown in Table 102801 J7 8 of 28 Rev 9-13-16
The allowable structural layer thicknesses for fine Type SP Hot Mix Asphalt mixtures are as follows: , meet the sand equivalent value for fine aggregate blend defined in Table 334-6 Table 334-6: , SUPERPAVE ASPHALT CONCRETE Last modified by:
SECTION 23 – ASPHALT CONCRETE TABLE OF CONTENTS Section Page , according to percentage of crushed particles and sand equivalent of the aggregate (for dense graded mixtures) or according to intended use (for open graded mixes) , Sieve Sizes Target Value Limits Allowable Tolerance 1" 100 — 3/4" 90 - 100 TV ±5 1/2" 70 - 90 TV ±6
asphalt concrete are evaluated for compliance to the mix design parameters and to the specifications – gradation, oil content, sand equivalent, stability and voids The production start up evaluation is conducted using aggregate taken from the production process and asphalt concrete taken from the material placed behind the paver
Section 00745 - Asphalt Concrete Pavement - Statistical Acceptance , Sand Equivalent T 176 45 min1 , Establish the target values for each allowable separated size after a maximum of 10 percent of planned stockpile quantity has been produced Produce the Aggregate within the
SP/SP23:051014 FOR HOTMIX ASPHALT WEARING COURSE SURFACING Page 1 of 18 TNZ P/23: 2005 PERFORMANCE BASED SPECIFICATION FOR HOTMIX ASPHALT WEARING COURSE SURFACING 1 SCOPE This specification sets out the performance requirements for the following types of , Sand Equivalent, or NZS 4407 Test 36 35 min, or Clay Index (
For adequate consolidation of concrete, the desirable amount of air, water, cement, and fine aggregate (that is, the mortar fraction) should be about 50% to 65% by absolute volume (45% to 60% by mass) Rounded aggre-gate, such as gravel, requires slightly lower values, while crushed aggregate requires slightly higher valu Fine
1 Prepare sand equivalent test specimens from the passing 475 mm sieve portion of the material to be tested after it has been processed according to the procedures prescribed in California Test 201, except that reclaimed aggregate containing traces of asphalt or asphalt concrete shall not be oven dried
AND ASPHALT CONTENT OF ASPHALT CONCRETE AASHTO T 30, AND MOISTURE CONTENT BY OVEN AND ASPHALT CONTENT BY IGNITION - WFLHD METHODS , Values Allowable , T Weight of sample + container, Dry U Moisture, % [100 x (Q - T) / S] SAND EQUIVALENT (AASHTO T 176) Cylinder No Time (20 min) Sand reading Clay reading Sand Equivalent Average SE value
hot mix asphalt and portland cement concrete The intent is to avoid using , maximum allowable percentage of the mass of each of the deleterious , All fine aggregates, except air-cooled blast furnace slag sand or granulated blast furnace slag sand, must have an acid insoluble content of not less .
Sand Equivalent Value of Soils and Fine Aggregate • Categories of Soils based on Particle Size: o Coarse aggregate o Fine aggregate , asphalt concrete • The presence of clay in fine aggregate can have detrimental effect on water sensitivity of asphalt concrete mix
tivity and amount are reflected in the sand equivalent value hut not in the loss by decantation Clay contami nants in concrete aggregate affect concrete properties primarily through their effect on water demand Con crete strength and shrinkage correlate to a high degree with sand equivalent value and to a slightly lesser degree
Limits For Sand Equivalent Of Aggregate For Concrete Minimum Astm D2419 minimum sand equivalent in structural concrete , for concrete minimum astm , limits for sand equivalent of , sand equivalent of aggregate for concrete .
Asphalt Paving for Building Sites - Department of Transportation and ,1 Materials and installation for asphalt concrete pavement for car park areas, , Test for Sand Equivalent Value of Soil and Fine Aggregate , The minimum allowable base temperature for a lift thickness is shown in the Block .
4 Aggregate Specifications and Requirements Physical Quality Requirements Fine Aggregates Coarse Aggregates , mix asphalt and portland cement concrete The intent is to avoid using highly , allowable percentage of the mass of each of the deleterious materials in a total
Apr 30, 2011· So if your sample has a 90 sand equivalent that means that 90% of the sample was good material and 10% was detrimental If you have a 40 sand equivalent that means that 40% of the sample was good material and 60% was detrimental Many materials such as concrete sands will have high SEs, in the 80s or 90s but it is very rare to see a 100 SE
Dec 01, 2014· Crushed stone is preferable to natural gravel in asphaltic concrete Asphalt adheres better to rough surfac The interlocking of angular particles strengthens the asphalt concrete and road base 6 Environmental restrictions, geographic distribution, and quality requirements have made sand and gravel extraction uneconomic in some cas
ITEM 421 PORTLAND CEMENT CONCRETE 4211 Description , The loss by decantation in accordance with Test Method Tex-406-A plus the allowable weight of clay lumps, shall not exceed one (1) percent, or the value shown on the plans, whichever is smaller , Where the sand equivalent value is greater than 85, the retainage on the No 50 sieve may .
AGGREGATE TESTS FOR HOT MIX ASPHALT: STATE OF THE PRACTICE Prithvi S Kandhal, Frazier Parker, and Rajib B Mallick INTRODUCTION Aggregates constitute 94-95 percent by weight of the hot mix asphalt (HMA) mixtur Therefore, the properties of coarse and fine aggregate are very important to the performance of the pavement system in which the HMA .
Sand Equivalent % Minimum Flat and Elongated 5 : 1 Ratio , 9 The maximum allowable percentage of loss of each individual coarse aggregate , 12 satisfaction of the Engineer before the aggregate is used in the asphalt mixture 13 Use natural sand that is non-plastic when ,
Mar 01, 2006· There is a common belief that concrete pavements are stronger than asphalt pavements The reason for this misconception is that comparisons are not made on equivalent ,
Apr 22, 2009· I DO have a bearing capacity issue on asphalt The state plan reviewer is requiring proof or reasonable evidence for the 3,000 psf assumed allowable bearing capacity on the existing asphalt that i used in my footing calculations I have the tie down issue taken care of with acceptable, data-provided, minute-man anchors