Design and Construction of Base Courses

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 …

Aggregate Crushing Value Test – Determine …

A steel cylinder 15 cm diameter with plunger and base plate. ... Aggregate crushing value = (W2 x 100) / (W1-W) W2 =Weight of fraction passing through the appropriate sieve W1-W =Weight of surface dry sample. …

Concrete & Highway Engineering Lab Manual

The aggregate crushing value is defined as a ratio of the weight of fines passing the specified IS sieve ... However, as the stresses at the base and sub-base courses are low aggregates with lesser crushing strength may be used at the lower layers of the pavement. Indian Roads Congress and ISI have specified that the aggregate crushing …

7 LAB TESTS ON AGGREGATE TO CHECK QUALITY FOR …

Then crushed aggregates are then sieved through 2.36 mm sieve and weight of passing material (W2) is expressed as percentage of the weight of the total sample (W1) which is the aggregate crushing value. Aggregate crushing value = (W1/W2)*100. A value less than 10 signifies an exceptionally strong aggregate while …

Practices for Unbound Aggregate Pavement Layers

Suggested Citation:"Chapter Three - Granular Base and Subbase Construction Practices ."National Academies of Sciences, Engineering, and Medicine. 2013. Practices for Unbound Aggregate Pavement Layers.Washington, DC: The National Academies Press. doi: 10.17226/22469.

Pavement materials: Aggregates 22.1 Overview

CHAPTER 22. PAVEMENT MATERIALS: AGGREGATES NPTEL May 3, 2007 Chapter 22 Pavement materials: Aggregates 22.1 Overview Aggregate is a collective term for the mineral materials such as sand, gravel, and crushed stone that are used with a binding medium (such as water, bitumen, Portland cement, lime, etc.) to form compound …

Fines inclusion in a crushed limestone unbound aggregate base course

Proper characterization of a dense-graded aggregate base/subbase material should include both quality and strength aspects. Gradation, passing the No. 200 sieve (smaller than 0.075 mm) fines content, and Atterberg limits for plasticity index (PI) are the most important properties that affect the quality and longevity of aggregates used as …

Crushing Plant Design and Layout Considerations

• Electronic control of crusher discharge opening and feed rate. With adjustment of a crusher's discharge opening, as the production continues through an on-line coarse size analysis of the crushed product (digital image analyses). Dance, A. 2001) • More attention is being paid to the impact on crushing circuit design caused by variations

AGGREGATE BASE AND SURFACE COURSE ITEMS

The asphalt aggregate base course shall be maintained in a satisfactory condition until the work is accepted by the Engineer. Equipment used in the construction of an adjoining ...

(PDF) Recycled concrete aggregate and cinder gravel as base course …

In this research, the potential use of recycled concrete aggregate (RCA) and CG as a base course construction material was investigated. A laboratory test involving the mechanical stabilization of ...

DIVISION 300 AGGREGATE COURSES

DIVISION 300 AGGREGATE COURSES . ... Crushing For grading other than Grading C, the following multipliers should be applied to crushing costs shown below for pit rock or quarry rock. ... Grading of Aggregate base or surface course (approximate) ID and MT. $0.80/CY loose .

AGGREGATE BASE COURSE MATERIAL TESTING AND …

A complete suite of characterization tests were conducted on 16 aggregate materials with laboratory samples consistently prepared for a mid-range dense-graded base course gradation. The tests included imaging-based aggregate particle shape analyses, moisture-density, resilient modulus, shear strength, and permanent deformation.

32 11 23 Aggregate Base Course

A. The aggregate base course shall be constructed to the width and section sho wn in the DRAWINGS. If the required compacted depth of base course exceeds six (6) inches, the base shall be constructed in two (2) or more layers of approximate equal thickness. The maximum compacted thickness of any one (1) layer shall not exceed six (6) inches. B.

(PDF) RELATIONSHIP BETWEEN AGGREGATE CRUSHING VALUE …

In this research, the potential use of recycled concrete aggregate (RCA) and CG as a base course construction material was investigated. A laboratory test involving the mechanical stabilization of ...

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 …

Permeability of Base Aggregate and Sand

Include the aggregate types that are more susceptible to crushing such as limestone, dolostone, and recycled concrete aggregates. Select the materials to cover the upper and lower boundaries of gradation ranges covered by the National Road Research Alliance (NRRA) member states for base course and subbase materials.

[Solved] As per IS 383-1970, the crushing value of an aggregate …

Explanation: Crushing test: This test is carried out to assess the strength of coarse aggregate when a compressive load is gradually applied.; Aggregate crushing value = (W 2 /W 1) × 100 where, W 1 = Total weight of the dry sample . W 2 = weight of material passing through 2.36 mm IS sieve. The aggregate crushing value for the surface …

IS 2386-4 (1963): Methods of test for aggregates for …

gate of 'aggregate crushing value' 30 or higher, the result may be anomalous, and in such cases the 'ten percent fines value' should be determined instead. NOTE 2 - The standard aggregate crushing test shall be made on aggre ... base-plate, of the general form and dimensions shown in Fig. 1. The surfaces in contact with the aggregate ...

SECTION 1043 AGGREGATE FROM CRUSHED …

21 1043-2 AGGREGATE BASE COURSE 22 The material shall meet the ABC gradation. The LL of the material shall be raised 5 points to 23 no more than 35. 24 1043-3 AGGREGATE SHOULDER BORROW 25 The material shall meet Section 1019. 26 1043-4 CLEAN COARSE AGGREGATE FOR ASPHALT 27 The material shall meet the …

Section 6F-1

aggregate or gravel or recycled materials (see Section 6C-1 - Pavement Systems for more information). Although the terms "base" and "subbase" are sometimes used interchangeably to refer to the subsurface layers of a pavement, base course is typically used in asphalt pavements, primarily

ITEM P-209 CRUSHED AGGREGATE BASE COURSE

209-1.1 This item consists of a base course composed of crushed aggregates constructed on a prepared course in accordance with these specifications and in conformity to the dimensions and typical cross sections shown on the plans. MATERIALS 209-2.1 AGGREGATE. Aggregates shall consist of clean, sound, durable particles of crushed …

Successful G1 Crushed Stone Basecourse Construction

G1 Crushed Stone for base course is not the same thing as crusher-run and it is not only a matter of density. It was developed during the late 1950's from single stage crusher …

SECTION 304 -- AGGREGATE BASE COURSE

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 …

Determining the Physical Properties of Aggregate …

of aggregate qualities for road base construction around the study area, so it will be better to conduct chemical tests of the aggregates because the site has many aggregate source so as to allocate the good product to other required areas. Key Words: Aggregate, Moisture content, Sieve, Base-Course, Unit weight 1. INTRODUCTION

Standard Specification for Materials for Soil-Aggregate Subbase, Base

1.1 This specification covers the quality and grading of the following materials for use in the construction of subbase, base, and surface courses: sand-clay mixtures; gravel; stone or slag screenings; sand; crusher-run coarse aggregate consisting of gravel, crushed stone, or slag combined with soil mortar; or any combination of these …

7.7 Aggregate Crushing Value and 10% Fines Value …

7.7 Aggregate Crushing Value and 10% Fines Value 7.7.1 Aggregate Crushing Value (ACV) 7.7.1.1 Introduction. One of the requirements, for the suitability of aggregates for construction, is the ability of the aggregate to resist crushing. The Aggregate Crushing Value gives a relative measure of the resistance of the aggregate to crushing under a

Determine Aggregate Crushing Strength

Procedure The aggregate sample: The material for the standard test consists of aggregates sized 10.0 mm to 12.5 mm.The aggregates must be in a surface dry condition before testing. The aggregates may be dried by heating at 100 oC – 110 o C for not more than 4 hours and cooled to room temperature before testing, if necessary.

ITEM P-209 CRUSHED AGGREGATE BASE COURSE

Gradation effects on the mechanical response of crushed stone aggregate

Aggregate base course (ABC) has been a part of road design since the early 1940s. In the early days of road design, contractors mixed local rock together with on-site soils, but as experience in ro...

CRUSHER RUN AGGREGATE AGGREGATE BASE MATERIAL

AGGREGATE BASE MATERIAL. Whenever a material usually used as a base course is used in the subbase position (reference Section 101 of VDOT's Road and Bridge …