300 Aggregate Base Courses 04 determine the level of compaction necessary to achieve the target density for the remaining base , determine if the aggregate is being crushed into fine material
Jul 23, 2019· A Aggregates for use in base course construction shall be either crushed stone or crushed gravel The fine aggregate shall consist of screenings obtained from crushed stone, gravel or sand Aggregate shall be washed if necessary to remove excessive quantities of clay, silty clay or salts
The California Department of Transportation (Caltrans) provides specifications for the use of recycled aggregate, sometimes referred to as crushed miscellaneous base (CMB), as base (section 26) or subbase (section 25) on road projectsThis Department of Resources Recycling and Recovery (CalRecycle) webpage is a selective list of Caltrans specifications for the use of recycled aggregate ,
the base course must be able to resist deformation due to loading The role of the unbound layer for flexible pavements is different in that the primary function is to increase structural capacity Within Mississippi, RCA used as aggregate for crushed stone courses is governed by
Section 815—Graded Aggregate 8151 General Description This section includes the requirements for material to be used for base, subbase, or shoulder course material, and includes graded aggregate, unconsolidated limerock base, and crushed concrete base 815101 Related References A Standard Specifications Section 800—Coarse Aggregate
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
AGGREGATE BASE COURSE DENSITY The most recent Aggregate Base Course (ABC) unit weight test results performed by the NCDOT M&T Soils lab can be queried using this page Use the drop down boxes to select the company and/or quarry submitting the sample To see the results of all tests, click on the "Search" button without specifying a company or .
Construction Aggregate Calculator Enter the width, length, thickness, and product density and hit the “Calculate” button to calculate your estimate If you do not know the product density, use the optional density estimator* or contact a local sales representative
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 .
DESCRIPTION 20911 This work shall consist of furnishing and placing one or more courses of crushed aggregate base on a prepared subgrade in accordance with these specifications and in conformity with the lines, grades, thicknesses and typical cross sections shown on the plans
The production of crushed aggregate may include quarrying (drilling and blasting) from solid rock, or may start with , Base Course Tertiary Crusher Wash Plant Delivery to Customer Quality Control , The apparent relative density of aggregate generally varies between 25 and 30
Aggregates in Concrete Concrete Technology 2 , Aggregates Types Crushed Stone or Manufactured Mineral Aggregate , density) of an aggregate is the ratio of its weight to the weight of an equal volume of water Most natural aggregates have specific gravities between 24 and
AGGREGATE BASE COURSES RELEASE – R211 SECTION 32 11 23 BART FACILITIES STANDARDS Issued: 10/01/2010 PAGE 5 OF 5 STANDARD SPECIFICATIONS D Aggregate base course 6 inches and less in thickness may be spread and compacted in one layer For thickness greater than 6 inches, the base course aggregate shall be spread and compacted in
Crushed Surfacing Base Course 2,950 148 3,700 185 Screened Gravel Surfacing 3,700 185 , The specific gravity of the aggregate will affect the weight of aggregate in the completed mix  Quantities shown do not provide for widening, waste from stockpile, or thickened edg Chapter 620 Design of Pavement Structure WSDOT Design Manual M 22 .
The properties of processed RCM generally exceed the minimum requirements for conventional granular aggregat Being a 100 percent crushed material, processed RCM aggregates "lock up" well in granular base applications, providing good load transfer when placed on weaker subgrade
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: A waterproof barrier to prevent fines infiltration into the subgrade and pavement structure
Cover the Item 304 Aggregate Base with the next layer of pavement before the end of the construction season If the aggregate base is not covered up, then assume all liability for the contamination, damage and instability for the base, subgrade and underdrains Provide drainage and maintain the material according to 20304A
Aggregate Base Subbase Aggregate Pavement or Shoulders Summary of Gradation Requirements 5-1 , cours ITM 205 is used to , There is a specific requirement for gravel coarse aggregates regarding crushed particl This requirement applies, however, only when gravel
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
P-208 SPECIFICATION P–208 AGGREGATE BASE COURSE DESCRIPTION 208–11 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 Construct it on a prepared underlying course in accordance with these Specifications and in conformance
SUBJECT: Density of Dense-Graded Aggregate Base; Ref, Your Memo 5c>15-59 Density requirements for crushed graded aggregate base courses are necessary to obtain the desired performance, ie to develop shear ing strength and to eliminate subsequent consolidation The load trans mission of a particular base material is thereby indirectly .
Crushed surfacing top course, base course, ballast, and gravel base, when mixed at a central plant, will be measured by the ton The weight of water added at the plant will be deducted on a daily basis from the total tonnage of aggregates, including water, placed that day which were processed through the central plant and placed on the Roadway
Jul 12, 2009· 4 7% OMC (optimum moisture content) seems a bit on the high side for pavement base courses I have used 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
Crushed HMA for use as Subbase : 127 pcf — — Base Course 145 pcf 155 pcf : 150 pcf Intermediate Course 147 pcf 155 pcf 150 pcf Surface Course 147 pcf 160 pcf 155 pcf The following densities should be used for estimating quantities of granular material Table 2: Granular Material Densities Material English Granular Subbase 135 pcf
Then, click on either Base Rock, Drain Rock, or a Custom Density material selection The Base Rock and Drain Rock selections will supply a default density of the rock; the Custom selection requires an entry for rock density in the Density field Finally, click on the Calculate button The calculated number of tons of aggregate will be returned
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
drawings should be referred to as "graded-crushed aggregate base course (GCA)" wherever a base material with a CBR of 100 is required "Graded-Crushed Aggregate Base Course" should be retained in the title and the rest of the specification should be edited accordingly to retain the information necessary for this material c
Granular Base Aggregate To produce a granular base or subbase aggregate, RAP must be crushed, screened, and blended with conventional granular aggregate, or sometimes reclaimed concrete material Blending granular RAP with suitable materials is necessary to attain the bearing strengths needed for most load-bearing unbound granular applications
Crushed stone or crushed gravel >= 85 percent aggregates Crushed concrete >= 90 percent crushed concrete that is substantially free of steel reinforcement and includes < 10 percent asphaltic pavement or surfacing, base, or a combination of asphaltic pavement, surfacing, and base, incorporated during the removal operation
When bituminous pavement cold millings or recycled crushed concrete are substituted for aggregate base, payment will be made for the aggregate base quantity provided in the plans, regardless of whether millings, recycled crushed concrete or the aggregate base is used 3042 Material Inspection for Sec 304 30421 Scope