There are two categories of based course Dense graded Bases, referred to locally as traffic bond, are well graded and include fines that firm up and become a hard, solid base for a variety of uses in construction In general, the heavier the load, the larger the stone you will select in your base course...
Aggregate Base Course Page 28-6 b The aggregate base material that has been processed in a traveling plant, or mixed and blended inplace, shall be spread in a uniform layer of - required depth and width and to the typical cross sectionThe spreading shall be by a self-powered blade grader, mechanical spreader, or other approved method...
Jul 23, 2019· Any material passing the 475 mm (No 4) sieve and produced in the crushing process may be incorporated in the base material up to the grading limits required for the base course aggregate F Crushed aggregate for base course shall meet the requirements of Class A or Class B gradings as shown in Table 313 when tested in accordance with ....
33 AGGREGATE BASE 331 Description This work shall consist of a base Type I or Type II, composed of crushed aggregate material placed and compacted on a prepared and accepted sub-base or other base course in accordance with these Specifications and the lines, levels, grades, dimensions and cross sections shown on the Drawings or as required ....
Crushed aggregate base course shall not be placed on frozen material 209-32 MIXING The aggregate shall be uniformly blended and when at a satisfactory moisture content per paragraph 209-34, the approved material may be transported directly to the spreading equipment...
An aggregate sample is selected, dried, and then the coarse part of the sample is selected by sieving over an appropriate sieve The retained coarse sample is washed to remove any remaining fine material and then dried Each aggregate particle is then individually inspected for the specified number of fractured fac...
301034 Crushed Aggregate Course When crushed aggregate course is a bid item, construct the aggregate surfacing section to the specified typical cross section and profile grade Select one of the following two options to construct the aggregate section: 1 Full depth crushed base course 2...
Crushed aggregate base course shall not be placed on frozen material 209-32 MIXING The aggregate shall be uniformly blended and when at a satisfactory moisture content per paragraph 209-34, the approved material may be transported directly to the spreading equipment...
Article 222 Material The leveling course shall consist of crushed gravel, rock, sand, or other approved material The aggregate shall be free from lumps, balls of clay, or other objectionable matter, and shall be durable and sound The portion of the material retained on a No 4 sieve shall be known as coarse aggregate...
coarse aggregates are used in HMA, compacted aggregates, and asphalt seal coats except asphalt seal coats used on shoulders Crushed particles are defined as those particles having one or more sharp, angular, fractured fac Fractured faces that have an ,...
crushed aggregate base P-208 Aggregate Base Course Crushed (%) 25 25 25 When aggregate base material is produced entirely by crushing rock, boulders, cobbles, slag or concrete, loss by washing must not exceed 10 percent (significant to the nearest whole percent) For aggregates produced from Contact Supplier...
Pavement layers composed of crushed aggregate particles provide higher strength than pavement layers composed of uncrushed particl Base course materials are typically required to be crushed because of the strength required near the pavement surface Some base course specifications require fractured faces on one side (reference is...
- Screened or partially crushed granular material consisting of well graded gravel, crushed stone or crushed gravel for sub-base course construction - Crushed stone for base course construction - Stabilizing materials including Portland cement, bitumen and lime to be used where specified in sub-base and base courses and in subgrad...
Fifty percent by weight of the combined coarse aggregate, other than naturally occurring rough-textured aggregate, shall consist of crushed pieces having one or more faces produced by fracture Crushed, coarse aggregate is defined for the purpose of this specification as material passing a 50 mm sieve and retained on a 2 mm (No 10) sieve...
SECTION 02621 AGGREGATE BASE AND SUBBASE COURSES 0262101 GENERAL A Description Aggregate base and subbase courses shall include, but not necessarily be limited to, furnishing and placing one or more courses of aggregate, including additives when required, on a surface prepared in accordance with the Contract Documents B Related Work ....
The base course or basecourse in pavements is a layer of material in an asphalt roadway, race track, riding arena, or sporting fieldIt is located under the surface layer consisting of the wearing course and sometimes an extra binder course If there is a sub-base course, the base course is constructed directly above this layer...
314 Crushed aggregate base course materials shall be produced and placed in their final location with as little segregation as possible 315 Excess reclaimed stabilized base material substantially meeting the requirements of 27 may be substituted for the crushed aggregate for shoulders in 26...
SP/SM4:060418 SPECIFICATION FOR BASECOURSE AGGREGATE Page 2 of 15 sample from the material successfully tested two years earlier shows that there has been no significant change in the material If a petrographic examination is used as described above the source properties shall be tested at least once every four years...
This Item shall govern for the construction of a base course, subbase course or foundation course, each course being composed of a compacted mixture of aggregate and asphalt cement mixed hot in a mixing plant, in accordance with the details shown on the plans and the requirements herein 3452 Materials...
- Screened or partially crushed granular material consisting of well graded gravel, crushed stone or crushed gravel for sub-base course construction - Crushed stone for base course construction - Stabilizing materials including Portland cement, bitumen and lime to be used where specified in sub-base and base courses and in subgrad...
P-208, Aggregate Base Course Page 3 of 5 The base material shall be stockpiled, either at the plant or on the worksite, prior to placing and spreading on the prepared underlying course (b) Materials of Proper Gradation When the entire base course material from coarse to fine is secured in a uniform and well-graded condition and contains...
An aggregate sample is selected, dried, and then the coarse part of the sample is selected by sieving over an appropriate sieve The retained coarse sample is washed to remove any remaining fine material and then dried Each aggregate particle is then individually inspected for the specified number of fractured fac...
ITEM P-209 CRUSHED AGGREGATE BASE COURSE DESCRIPTION 209-11 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...
Do not use crushed concrete coarse aggregate in the following: mainline pavements or ramps with a commercial ADT greater than or equal to 250, concrete base course, bridges, box or slab culverts, headwalls, retaining walls, pre-stressed concrete, or other heavily reinforced concrete Avoid contamination with non-concrete materials, including ....
Jul 23, 2019· Any material passing the 475 mm (No 4) sieve and produced in the crushing process may be incorporated in the base material up to the grading limits required for the base course aggregate F Crushed aggregate for base course shall meet the requirements of Class A or Class B gradings as shown in Table 313 when tested in accordance with ....
crushed faces of aggregate base course material - , Know More Texas Crushed Base Home D1241 - 07 Standard Specifiion for Materials for Soil-Aggregate Subbase, Base, and Surface Courses , coarse aggregate, crushed ,....
Do not use crushed concrete coarse aggregate in the following: mainline pavements or ramps with a commercial ADT greater than or equal to 250, concrete base course, bridges, box or slab culverts, headwalls, retaining walls, pre-stressed concrete, or other heavily reinforced concrete Avoid contamination with non-concrete materials, including ....
P-209, Crushed Aggregate Base Course Page 3 of 5 the materials to meet the specifications and to secure the proper moisture content for compaction 33 Placing The crushed aggregate base material shall be placed on the moistened subgrade in layers of uniform thickness with a mechanical spreader The maximum depth of a compacted layer shall...
with high quality crushed aggregate materials The objective of this study was to evaluate rutting potentials of aggregate materials used in pavement base course in North Carolina and develop and calibrate rutting damage models primarily based...
SECTION 02621 AGGREGATE BASE AND SUBBASE COURSES 0262101 GENERAL A Description Aggregate base and subbase courses shall include, but not necessarily be limited to, furnishing and placing one or more courses of aggregate, including additives when required, on a surface prepared in accordance with the Contract Documents B Related Work ....