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PART E – SURFACE COURSES ITEM 300 – AGGREGATE SURFACE COURSE. 300 Description. This item shall consist of a wearing or top course composed of gravel or crushed aggregate and binder material, whichever is called for in the Bill of Quantities, constructed on a prepared base in accordance with this Specification and in conformity with the lines, grades …
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This document discusses material requirements and construction process for a base course using crushed rocks (CRR) and crushed stones (CRS). CRR and CRS are suitable aggregate materials that must meet certain strength and composition standards. The base course is constructed by spreading, compacting, and finishing the aggregate material to specified densities on top of a …
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In relation to surface course HMA mixes, base course mixes usually contain larger maximum aggregate sizes, are more open graded and are subject to more lenient specifications. Figure 4. Unbound aggregate base course place and graded on SR 97 south of Bend, Oregon. Subbase Course. The subbase course is between the base course and the subgrade.
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The surface of the aggregate base course shall be finished by blading or with automated equipment especially designed for this purpose. In no case will the addition of thin layers of material be added to the top layer of base course to meet grade. ... and incidentals necessary to complete the item. Payment will be made under: Item P-209-5.1 ...
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208-5.1 Aggregate Surface Course will be paid for at the contract price, per unit of measurement, accepted in place. Payment will be made under: Item P-208a Crushed Aggregate Surface Course - per cubic meter. Item P-208b Uncrushed Aggregate Surface Course - per cubic meter. Item P-208c Crushed Aggregate Surface Course - per megagram
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Materials for gravel surface course and crushed aggregate surface course shall have a soaked CBR Value of not less than _____ 300.3.4. Surface Course Thickness and Tolerances +15 mm, - 5 mm. Permitted variation from design THICKNESS OF LAYER +15 mm, - 5 mm.
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The surface of the aggregate base course shall be finished by blading or with automated equipment especially designed for this purpose. The grade shall be measured on a 25 foot grid and be within +/0.04 foot (12.710 mm) of specified grade. ... The quantity of crushed aggregate base course to be paid for will be determined by measurement of the ...
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mixture of crushed stone developed specifically as a surface wearing course for unpaved roads. DSA has a unique particle size distribution designed to maximize packing density and produce a durable road surface that performs better than conventional aggregates (which are usually designed for drainage or fill).
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DPWH STANDARD SPECIFICATION Item 200 - Aggregate Sub-base Course Item Log in Join. 8.1 ITEM 200 and 201 - Aggregate Subbase and Base... Pages 75. Total views 100 ... crushed or naturally angular particles of rock which will pass a 75.0 mm sieve and be retained on a 2.00 mm ... base and gravel surface courses in a road construction.
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The document outlines the DPWH standard specifications for various aggregate and stabilized base course materials used in road construction. It describes the material requirements, grading specifications, and construction procedures for different item types including: - Item 200: Aggregate Sub-base Course - Item 201/202: Crushed Aggregate Base Course - Item 203: …
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Aggregate Base Courses 32 11 23 - 1 SECTION 32 11 23 - AGGREGATE BASE COURSES PART 1 GENERAL 1.1 SUMMARY A. Section Includes: 1. Aggregate base course. ... Finish concrete surface course. 7. Section 32 91 19 - Landscape Grading: Topsoil fill at areas adjacent to aggregate base course. 8. Section 33 05 13 - Manholes and Structures: Manholes ...
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CEMENT STABILIZED CRUSHED AGGREGATE BASE COURSE 231.1 Description. This item shall consist of a foundation for surface course or for other base courses and shall be composed of a mixture of crushed aggregate, Portland cement and water and shall be constructed as herein specified and in conformity with the typical cross sections shown on
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The compaction quality of asphalt surface courses has a significant impact on the overall performance of asphalt pavements, but the dynamic response and compaction degree variations of different asphalt surface courses (top, middle, and bottom surface courses) during vibrational compaction have still received limited research. SmartRock sensors can be utilized …
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Program (DGLVRMP). DSA is an aggregate mixture of crushed stone designed specifically as a surface‐ wearing course for unpaved roads. DSA provides a durable road surface with longer maintenance cycles than conventional road surface aggregates. II.
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the aggregates base course to the ENGINEER for testing. Gradations for the aggregate base course used in a particular day's placement shall be submitted to the ENGINEER upon request. 302.3.2 Prime coat for surface sealing of compacted aggregate base course shall comply with the requirements of CSS-1H Cationic Emulsified Asphalt as specified in
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208-2.2 crushed aggregate surface course. The aggregates shall consist of both fine and coarse fragments of crushed stone or crushed gravel mixed or blended with sand, screenings, or other …
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Section 304—Aggregate Base or Surface Course Description 304.01 Work. Furnish, haul, and place aggregate base or surface course on the subgrade or base or stockpile site approved by …
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This specification covers the quality and grading of sand-clay mixtures; gravel, stone, or slag screenings; or sand, crusher run coarse aggregate consisting of gravel, crushed stone, or slag with or without soil mortar or any combination of these materials for use in the construction of subbase, base, and surface courses.
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Study with Quizlet and memorize flashcards containing terms like separator between coarse and fine aggregates, mass percent of wear shall not be more than ____ for item 300, if crushed aggregate/gravel is used, not less than ___ of the particles retained on the Sieve No. 4 and shall have at least ___ fractured face and is applicable for all items on surface course and more.
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CRUSHED AGGREGATE BASE COURSE 230.1 Description. This item shall consist of a foundation course for a surface course or for other base courses and shall be composed of crushed aggregate materials; and shall be constructed as herein specified in one or more courses in conformity with the typical sections shown on the plans
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Section 302 ± Aggregate Base and Surface Course 2. Section 709 ± Geosynthetics 3. Section 816 ± Aggregates 4 . Section 817 ± Salvaged Base Course 1.04 Submittals ... Aggregate or used as Aggregate Base. 1. Ensure all crushed concrete is free of debris and/ or deleterious materials . 2 . Up to 100 percent of the base material may be crushed ...
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Section 304—Aggregate Base or Surface Course Description 304.01 Work. Furnish, haul, and place aggregate base or surface course on the ... INGS; except, if crushed aggregate products are being produced and mineral filler, binder, or additives are required, uniformly blend during crushing. (a) Stationary Plant Method. Mix the aggregate with ...
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Study with Quizlet and memorize flashcards containing terms like ITEM 300 AGGREGATE SURFACE COURSE 1. ___________ is the separator between coarse and fine aggregates, ITEM 300 AGGREGATE SURFACE COURSE 2. Mass percent of wewr shall not be more than ____, ITEM 300 AGGREGATE SURFACE COURSE 3. If crushed aggregate/gravel is used, not less …
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consist of durable particles of crushed aggregate, mixed with approved binding material. Provide crushed material having a minimum compressive strength of 45 psi at 0 psi lateral pressure …
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Surface Course. The surface course is the layer in contact with traffic loads and is made of PCC. It provides characteristics such as friction (see Figure 3), smoothness, noise control and drainage. In addition, it serves as a waterproofing layer to the underlying base, subbase and subgrade. The surface course can vary in thickness but is ...
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#A FLEXIBLE pavement structure usually consists of a surface course composed of asphalt and mineral aggregate and a base course. The base course is generally com posed of granular material such as crushed aggregate, gravel, selected soil, or a mix ture of selected soil and aggregate. Since the cost of the surface course per ton is sev
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A. Aggregates: Aggregates for bases shall be crushed stone, crushed slag, crushed gravel or natural gravel that conforms to the quality requirements of AASHTO M147, except that the …
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1. Section 302 – Aggregate Base and Surface Course 2. Section 709 – Geosynthetics 3. Section 816 – Aggregates 4. Section 817 – Salvaged Base Course 1.04 Submittals ... crushed concrete may be blended with Class 5 Aggregate or used as Aggregate Base. 1. Ensure all crushed concrete is free of debris and/or deleterious materials. 2. Up to ...
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In urban areas, the selection of a surface course depends on traffic volume and speed, severity of the pavement roughness, possibility of vehicle damage due to airborne aggregate, and the possibility that vehicles will be coated with emulsified asphalt. When a hot mix asphalt surface is used in an urban area with unstable soils, the thickness
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Studies, DSA is a mixture of crushed stone developed specifically as a surface wearing course for unpaved roads. DSA has a unique particle size distribution designed to maximize packing density and produce a durable road surface that performs better than conventional aggregates. Inside the DSA: Larger particles locked tightly in
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The crushed aggregate base course material shall have a 4-day soaked CBR of not less than 80 when compacted at 100 percent of Modified Proctor AASHTO T180 (Method D) and tested in accordance with ...
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AGGREGATE BASE COURSE SPECIFICATION (Updated August 2024) DESCRIPTION. This work shall consist of furnishing and placing aggregate base course on a prepared surface in …
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The focus of the design methodologies is a stable foundation (existing subgrade) for aggregate surfacing, assuming the design load is applied at the top of the aggregate (surface course). The importance of the applied load position is covered under the Literature Review section. The chief failure mode of an aggregate surface on existing ...
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This item consists of a base course composed of crushed aggregate constructed on a prepared course in accordance with these Specifications and to the dimensions and typical cross …
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ITEM 304.98 06 M - CRUSHED SUBBASE COURSE 1 of 4 10/15/2008 DESCRIPTION Furnish and place crushed subbase course as shown on the Contract Plans or as ordered by the Engineer. MATERIALS A. CRUSHED STONE, CRUSHED GRAVEL AND CRUSHED BLAST FURNACE SLAG Provide crushed stone, crushed gravel or crushed blast furnace slag …
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ITEM 200 – AGGREGATE SUBBASE COURSE - DPWH Blue Book. Recently Searched ... Aggregate for subbase shall consist of hard, durable particles or fragments of crushed stone, crushed slag, or crushed or natural gravel and …
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