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  • Asphalt Concrete Base (ACB) - Pavement Interactive

    Asphalt Concrete Base (ACB) 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:

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  • Aggregates Specifications | Ontario Sand, Stone & Gravel

    Provides strength and an even profile for the wearing course. GRANULAR BASE: Provides load-bearing, strengthening and drainage characteristics for the pavement : GRANULAR SUBBASE: Lowest layer of the pavement; acts as the principle foundation for the subsequent road profile: SUB-GRADE: Usually natural soil, exposed rock formation, or rock fill: Aggregates for use in asphalt concrete mixes must

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  • ITEM P-208 AGGREGATE SURFACE COURSE

    208-1.1This 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 according to these Specifications and to the dimensions and typical cross section shown on the Plans.

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  • Chapter 4: Construction Details, Section 26: Aggregate

    Aggregate base is designated as Class 2 or Class 3. The Bid Item List and plans specify the class and unit of measurement, and the Standard Specifications

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  • August 2015 No. 900 SPECIFICATIONS FOR AGGREGATE FOR

    Granular base course aggregate will be subject to testing by the Engineer at the time the material is being produced and after being laid on the road. Before hauling, the Contractor shall place the processed aggregate in a stockpile, until satisfactory production tests have been completed. Rejected material shall be immediately moved to the vicinity of the feed end of the crusher for re

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  • Aggregate Materials Calculator

    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.

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  • Typical Road Structure Cross Section - Sub Grade, Base

    Base Course; Sub Base; Sub Grade; 1. Surface/Wearing Course in pavement cross section: The top layers of pavement which is in direct contact with the wheel of the vehicle. Usually constructed of material in which bitumen is used as binder materials. a. Bituminous Pavement: Consists of combination of mineral aggregate with bituminous binder ranging from inexpensive surface treatment ¼ in or

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  • SPECIFICATION P–208. AGGREGATE BASE COURSE

    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.

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  • base course aggregate compaction - Earthwork/grading

    2009-07-12· It would suggest that you are not using crushed stone aggregate and that your base course material is a bit on the sandy side - or, forbid, the base course has significant fines that might be clayey in nature (high PI). 5. 85% is very much on the low side - especially since end dumping into a pile will be in the order of 85% (standard proctor).

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  • GENERAL ASPHALT AND CONCRETE TERMS AND DEFINITIONS

    SUBBASE: The layer or course in the pavement structure that is immediately below the base course of asphalt. Typically the sub -base is a type of aggregate, such as 21A stone. If the sub-grade soil (see below) has adequate support, it may serve as the sub-base.

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  • 3505 SPECIFICATION FOR SOIL STABILIZED GRAVEL BASE COURSE

    2.01 Base aggregate shall be composed of sound, hard and durable particles of sand, gravel and rock free from injurious quantities of elongated, soft or flaky particles, shale, loam, clay balls and organic or other deleterious material. 3505 - 3 CONSTRUCTION

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  • Typical Road Structure Cross Section - Sub Grade, Base

    Heat a viscous bituminous binder to make it fluid, then in a plant mix it with heated aggregate place and compact the mixture while it is hot. Use fluid bituminous binder, mix it with aggregate at normal temperature. Mixing may be done at a plant (plant mix) or on the prepared roadway base (road mix).

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  • Aggregate Base Course - definition of Aggregate Base

    (Arch.) The first or lower course of a foundation wall, made of large stones or a mass of concrete; - called also foundation course. (b) The architectural member forming the

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  • 32 11 23 - Aggregate Base Course

    A. Aggregate base course shall be applied over the prepared sub grade or sub base and compacted in accordance with Section 26 of the Caltrans Standard Specifications. B. Aggregate base course shall have minimum uniform thickness after compaction of dimensions indicated. Where not indicated, compacted thickness shall be 6 inches.

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  • Aggregates Specifications | Ontario Sand, Stone & Gravel

    Aggregate is usually described as either coarse aggregate (retained 4.75 mm) or fine aggregate (passing 4.75 mm). Aggregates generally make up about 95 percent of the total mass of hot-mix asphalt mixtures and 80 percent by mass of concrete - aggregate properties are, therefore, critical for quality hot-mix asphalt or concrete.

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  • Chapter Four - Unbound Aggregate Base Characterization for

    The base course in each pavement was a crushed Texas limestone meeting the Texas DOT Grade 1, Item 248, aggregate base specifica- tions. The test sections were instrumented with multidepth deflectometers (MDDs), and an FWD was positioned directly over the MDDs and at several different positions away from MDD and the pavement responses (deflections) collected. FWD data were used

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  • Aggregate Base Course - XpCourse

    Aggregate "base course" refers specifically to the underlying concrete layer of a road or track, over which the wearing course is poured.While aggregate base course is typically made from materials mined directly from the earth, aggregates can also be made from recycled concrete, called crushed concrete aggregate.

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  • City of Regina Standard Construction Specification SECTION

    3.1.1 The base course shall consist of an intimate mixture of course aggregate, sand, clay, and water. These materials shall be combined, compacted and finished in a true workmanship like manner on the previously prepared sub- base or subgrade to a compacted thickness as shown on cross-sections and plans, and in these specifications. 3.1.2 All tools, machinery, plant and equipment used in

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  • HMA Pavement - Pavement Interactive

    Base course. This is the layer directly below the surface course and generally consists of aggregate (either stabilized or unstabilized) or HMA.

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  • 3505 SPECIFICATION FOR SOIL STABILIZED GRAVEL BASE COURSE

    Raw aggregate = (Granular base course less binder, filler and blender sand) x 1.11 Processing 3.07 Base mix production shall comply with the following requirements during the pugmilling stage: (a) The Contractor shall cease operations if the moving average for any sieve does not comply with the specified requirements listed in Table 1. (b) Operations shall not recommence until the specified

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aggregate base course

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