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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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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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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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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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Approved – 8/2012 B/CS Unified Specifications 1 Section 32 05 16 Aggregate for Surface Treatments SECTION 32 05 16 AGGREGATE FOR SURFACE TREATMENTS PART 1 - GENERAL 1.1 DESCRIPTION A. This item establishes the requirements for aggregates to be used in the construction of
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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 concrete surface is used in an urban area with unstable soils, the
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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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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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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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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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Aggregates shall consist of clean, sound, durable particles of crushed stone, or crushed gravel, or crushed slag and shall be free from coatings of clay, silt, vegetable matter, and other …
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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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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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#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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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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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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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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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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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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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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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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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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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
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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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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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The work provided under this specification shall include the furnishing, placement and compaction of aggregate base course (ABC) to the lines, grades, dimensions, moisture, density and typical …
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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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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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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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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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The Contractor shall remove all survey and grade hubs from the base courses prior to placing any bituminous surface course. METHOD OF MEASUREMENT. The quantity of Crushed Aggregate Base Course to be paid for will be determined by measurement of the number of square yards of material actually constructed, at the design thickness, and accepted by ...
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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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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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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 …
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Section 800—Coarse Aggregate 800.1 General Description This section includes requirements for coarse aggregate. All aggregate shall be the specified type, class, and grade, and shall meet the requirements for the intended use. 800.1.01 Related References A. Standard Specifications Section 424—Bituminous Surface Treatment B. Referenced Documents
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CRUSHED AGGREGATE BASE COURSE 307.1 GENERAL 307.1.1 Description of Work The purpose of a crushed aggregate base course (CABC) is to: 1. distribute the wheel loads transmitted to the subgrade or subbase, if specified; 2. provide a free-draining underlying material layer; and 3. provide a material layer that is not readily susceptible to frost on ...
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