Jul 12, 2009· How many passes a 14 Tonne vibratory roller should make to achieve compaction for base course aggregate? The MDD is 2.315 T/cum, OMC = 7%. Please help as the site is facing serious delays because of less compaction achieved even after 5-6 full passes. The maximum compaction achieved is only 85%!! Hope somebody can help me out of this ... Granular Base Aggregate. To produce a granular base or subbase aggregate, RAP must be crushed, screened, and blended with conventional granular aggregate, or sometimes reclaimed concrete material. Blending granular RAP with suitable materials is necessary to attain the bearing strengths needed for most load-bearing unbound granular applications.
Being a 100 percent crushed material, processed RCM aggregates "lock up" well in granular base applications, providing good load transfer when placed on weaker subgrade. The lower compacted unit weight of RCM aggregates compared with conventional mineral aggregates results in higher yield (greater volume for the same weight), and is therefore ... Aggregate base is a construction aggregate typically composed of crushed rock capable of passing through a 20 millimetres (3 ⁄ 4 in) rock screen.The component particles will vary in size from 20 mm down to dust. The material can be made of (newly mined) rock, or of recycled asphalt and concrete.
This script helps estimate the aggregate tonnage required for a particular job. To use this calculator, enter the appropriate width, length, and thickness of this application. Click on the measuring designator for thickness in feet or inches. Then, click on either Base Rock, Drain Rock, or a Custom Density material selection. Type A. Crushed stone produced and graded from oversize quarried aggregate that originates ... required density and moisture content. Provide a smooth surface that conforms to the typical sections, lines, ... Place successive base courses and finish courses using the same construction methods required for the first course.
2. Crushed aggregate base coarse (Compaction Gravel) shall be purchased per standard ton with a standard ton to weight 2,000 pounds for the purpose of this contract. Material shall be ordered in full truck load lots. 3. Contractor shall proceed with delivery of crushed aggregate base coarse (Compaction Gravel) upon 12 hour notice. 4. slag, crushed hydraulic cement concrete (CHCC), natural or crushed sand; with or without soil mortar. Subbase material may be used in a stabilized or unstabilized form. (b) Aggregate base material may be designated as Type I or Type II as follows: Type I shall consist of crushed stone, crushed slag, crushed hydraulic cement concrete (CHCC), crushed
SECTION 304 DIVISION 300-- BASE COURSES SECTION 304 -- AGGREGATE BASE COURSE Description 1.1 This work shall consist of furnishing and placing base courses on a previously prepared subgrade or course as shown on the plans or as ordered. 1.2 This work shall also include raising the grade of the edge of the roadway shoulders with crushed aggregate as shown To calculate the quantity needed for a particular job, measure the length, width, thickness and product density (located below), of the area, plug in your numbers and our aggregate calculator will estimate the amount you will need to order. Please make sure to add 10% more to your total quantity to take into account waste during product placement.
The California Department of Transportation (Caltrans) provides specifications for the use of recycled aggregate, sometimes referred to as crushed miscellaneous base (CMB), as base (section 26) or subbase (section 25) on road projects.This Department of Resources Recycling and Recovery (CalRecycle) webpage is a selective list of Caltrans specifications for the use of recycled aggregate … Aggregate Baserock Primer. Aggregate Baserock is a dense graded blend of coarse and fine aggregate which when properly placed and compacted provide a stable and durable base allowing further construction. Aggregate Baserock Should Demonstrate: Stability: Resist deformation when under load (after proper placement and compaction).
subgrade characteristics and aggregate thickness, are likely to control performance. Specifically, a crushed limestone CA-6 compacted to 95 percent of the maximum laboratory density was identified as a best practice and can be used at thicknesses less than indicated in the Subgrade Stability Manual. Gravel and recycled asphalt pavement Construction Aggregate Calculator. Enter the width, length, thickness, and product density and hit the "Calculate" button to calculate your estimate. If you do not know the product density, use the optional density estimator* or contact a local sales representative. Thickness: Feetselect. Density…
209-3.5 ACCEPTANCE SAMPLING AND TESTING FOR DENSITY. Aggregate base course shall be accepted for density on a lot basis. A lot will consist of one day's production where it is not expected to exceed 2400 square yards. A lot will consist of one-half day's production where a day's production is expected to consist of between 2400 and 4800 square ... The approximate bulk density of aggregate that is commonly used in normal-weight concrete is between 1200-1750 kg/m3 (75-110 lb/ft3) . Here, Standard test method for determining the bulk density of aggregates is given in ASTM C 29 (AASHTO T 19).  Relative Density of Aggregate  The relative density (specific gravity) of an aggregate is the ...
P-208 Aggregate Base Course DESCRIPTION 1.1 This item shall consist of a base course composed of a partially crushed and uncrushed coarse aggregate combined with natural fine aggregates (sand) and soil. It shall be constructed on a prepared underlying course … Crushed stone is often used as a material for producing concrete. It is also used as a road base, and in some locations it is used for paving roads, for example Russia has over 400,000 km (250,000 mi) of gravel roads. It is a great driveway base material, bike path base fill, paver patio sub base, walkways, and just general fill material.
drawings should be referred to as "graded-crushed aggregate base course (GCA)" wherever a base material with a CBR of 100 is required. "Graded-Crushed Aggregate Base Course" should be retained in the title and the rest of the specification should be edited accordingly to retain the information necessary for this material. c. This course requires 16 hours of classroom/laboratory attendance. Upon completion of this course, the student should understand the operation of the nuclear density gauge on asphaltic concrete, crushed aggregate base course, and on non-cohesive and cohesive soils.
Crushed HMA for use as Subbase : 127 pcf — — Base Course . 145 pcf 155 pcf : 150 pcf . Intermediate Course 147 pcf 155 pcf 150 pcf Surface Course 147 pcf 160 pcf 155 pcf . The following densities should be used for estimating quantities of granular material. Table 2: Granular Material Densities . Material English. Granular Subbase . 135 pcf density is adequate for each of the various materials making up the flexible pavement structure. It is with a solution to this problem, particularly as it applies to granular base and subbase materials, that this paper deals. There exists a wide variety of methods of laboratory tests for maximum density of soils and soil-aggregate materials.
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. Coarse aggregate is also described by its bulk density, which is a property that can easily be tested in the laboratory. The standard testing procedure for this is the American Society of Testing ...
density standards for field compaction of granular bases and subbases j. p. roston, f. l. roberts and w. baron clemson university clemson, south carolina -research sponsored by the american association of state highway and transportation officials in cooperation with the federal highway administration areas of interest: pavement design Coarse Aggregate in general should consist of natural occurring stones (crushed, uncrushed or broken), riverbed single or pit gravel. It should be hard, strong, dense, durable, and clean. It must be free from veins, adherent coatings and injurious amounts of disintegrated pieces, alkali, vegetable matter and other deleterious substances.
(There may be an additional layer under the base course, called a subbase course, but this is not the case in all instances.) CSBC is effective as the second layer of a roadway because its traits allow it to do both jobs required of a base course. CSBC is made up of small, crushed stones. The aggregate shall be free from lumps of clay, organic matter, and other objectionable materials or coatings. And for P-209. This item consists of a base course composed of crushed aggregate base constructed on a prepared course in accordance with these specifications and in conformity to the dimensions and typical cross-sections shown on the ...
Aggregate Bulletin Test Data Soils and Aggregate Technology Division 7450 Traffic Drive Hanover, Maryland 21076 ... Base, Alkali Independent ... Specific Gravity (Relative Density) and Absorption of Fine Aggregate • AASHTO T85 - Specific Gravity (Relative Density) and Absorption of Coarse Aggregate Acadiana Shell & Limestone provides Limestone, Gravel, Aggregates, Base Course, 610 Limestone & more to Oilfield Locations & Construction Sites in Louisiana Facebook Toll-Free 800-366-0612 [email protected]
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. P-208-1 5/09 ITEM P-208 AGGREGATE SURFACE COURSE DESCRIPTION . 208-1.1 This item consists of an aggregate surface course composed of crushed or uncrushed coarse aggregate bonded with either soil or fine aggregate or both. It shall be constructed on a prepared course
The subbase sits below the base course layer before pavement is poured in place. This product is usually used in conjunction with concrete or asphalt pavements. Subbase materials serve well for walking paths as well as both structural and trench backfill. Subbase is also very commonly used to create ranch and vineyard roads. Jun 09, 2005· The (150-180) density data comes from a "Design and Control of Concrete Mixtures" book and appears to refer to the "particle" density of aggregate. However, since the aggregate is made up of particles, it is reasonable that the compacted density of the aggregate is between (150-180 lb/ft^3).
density is adequate for each of the various materials making up the flexible pavement structure. It is with a solution to this problem, particularly as it applies to granular base and subbase materials, that this paper deals. There exists a wide variety of methods of laboratory tests for maximum density of soils and soil-aggregate materials. P-208 SPECIFICATION P–208. AGGREGATE BASE COURSE DESCRIPTION 208–1.1 This Work consists of a base course composed of hard, durable particles or fragments of crushed coarse aggregate blended with either binder and fine aggregate or filler. Construct it on a prepared underlying course in accordance with these Specifications and in conformance
aggregate base course density The most recent Aggregate Base Course (ABC) unit weight test results performed by the NCDOT M&T Soils lab can be queried using this page. Use the drop down boxes to select the company and/or quarry submitting the sample. UFGS 32 11 24 Graded Crushed Aggregate Base Course for . 3824 Laboratory Density Tests 3825 requirements for graded crushed aggregate base tile, crushed gravel, crushed stone, or crushed slag, free of lumps or to 85 percent by weight passing through a 19 mm 3/4 inch sieve ]PART 3. Contact Supplier; Chapter 3 Aggregates.
The crushed stone or crushed gravel aggregate make the asphalt or concrete mix somewhat difficult to place. To improve the workability, many mixes contain both angular and round particles. The coarse aggregate particles are usually crushed stone or crushed gravel, and the fine aggregate particles are usually natural sand. CITY OF HOUSTON RECYCLED CRUSHED STANDARD SPECIFICATION CONCRETE BASE COURSE 02713-1 07/01/2009 Section 02713 RECYCLED CRUSHED CONCRETE BASE COURSE PART 1 G E N E R A L 1.01 SECTION INCLUDES A. Recycled crushed concrete base (RCCB) course. 1.02 MEASUREMENT AND PAYMENT A. Unit Prices. 1.