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results show that the aggregate complies w ith this specification testing will be at the Principal s cost otherwise testing will be at the cost of the Contractor Production Property Tests Quality of Fines The basecourse aggregate shall comply with either Sand Equivalent or Clay Index or Plasticity Index requirement stated below
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Base and subgrade materials are treated with chemical additives to achieve one or more goals when available materials do not meet project specific requirements Reasons for treatment include the following Anchor #AGONABQQ increase strength to provide long term support for the pavement structure Anchor #NYGQVTWU
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B Lump Sum If the Bid Schedule indicates a lump sum for aggregate base course the Lump sum method of measurement and payment will be in accordance with Section 01 20 00 Price and Payment Procedures Article Issued 10/01/2024 PAGE 5 OF 5 STANDARD SPECIFICATIONS D Aggregate base course 6 inches and less in thickness may be spread
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Specification 304 Aggregate Base Course and paragraphs c d and e below will not apply c The subbase material shall have the moisture content required to obtain the specified density after compaction The Contractor shall be responsible for determining the required moisture content and for controlling it within the proper limits as the
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2 The portion passing the mm sieve shall have a liquid limit not more than 25 and Plastic Index more than 6 3 The coarse aggregate retained on mm sieve should have a mass percent of wear not more than 45 and not less than 50 mass percent shall have a least one fractured face
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Base Course of Gravel Road Base course should natural river sand and gravel mixture of consistent grading and strength with the following properties The base course material should have following textural gradation Nominal Maximum Size 3″ BS Sieve % Passing by weight 3″ 100 2″ 85 100 3/8″ 37 75 3/16″ 25 60 No 7 20 50 No 36 10 30 No 200 0 15
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Aggregate base course shall be accepted for density on a lot basis A lot will consist of one day s production where it is not expected to exceed 2400 square yards 2024 square meters A lot will consist of one half day s production where a day s production is expected to consist of between 2400 and 4800 square yards 2024 and 4000 square meters
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If the Micro Deval limits in CSA 14 Table 12 for fine aggregate are met then the tests for clay lumps and low density granular materials may be waived TABLE 11 Requirements for fine and coarse aggregates for use in controlled low strength materials other than unshrinkable fill and concrete of strength < 10MPa
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Sheet 1 of 18 19 S T A T E O F T E N N E S S E E Limits Percent by Weight Clay Lumps 05 as a mineral aggregate base course needed to conform to these Specifications Provide aggregate of Types A and B
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The selection of an appropriate base material for any pavement is dependent on the anticipated traffic levels and the overall interaction of the base course with the entire pavement structure A good quality base m aterial has the following characteristics Resistant to load Withstands compaction without particle breakdown
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Base course and sub base materials will be of a type approved by the Contract Administrator Base course and sub base materials shall be sound durable particles produced by crushing screening and grading of recovered materials Base course and sub base materials shall conform to the grading requirements in
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Aggregate Baserock is a dense graded blend of coarse and fine aggregate which when properly placed and compacted provide a stable and durable base allowing further construction Stability Resist deformation when under load after proper placement and compaction Durability Resist degradation due to use after proper placement and compaction
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40mm REPORT / RESULT The percentage of clay lumps shall be calculated to the nearest % in accordance with the following formula L = [ W R /W] X 100 Where L = Percentage of clay lumps W = Weight of sample R = Weight of sample after removing of clay lumps SPECIFICATION FOR CLAY LUMPS IN AGGREGATE
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scope 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 materials
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Base Dense Graded Base Coarse Common Sizes 1 1/2 and smaller Other DOT sizes available Designations Base Base Course Graded Base Course GAB Aggregare Base Course ABC Common Applications Foundations for Highways and Structures Road Shoulder Stabilization Unpaved Road Stabilization Driveways Engineered Backfill Cement treated Base
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The asphalt concrete mixtures shall consist of a uniform mixture of coarse crushed aggregate fine aggregate mineral filler and asphalt materials The combined aggregates including filler shall meet the requirements of the following gradation using methods detailed in ASTM C 117 and C 136 Gradations conforming with AASHTO T 11 and T 27
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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 materials
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The fraction passing the No 40 mm sieve shall have a liquid limit no greater than 25 and a plasticity index of not more than 4 when tested in accordance with ASTM D 4318 The fine aggregate shall have a minimum sand equivalent value of 35 when tested in accordance with ASTM D 2419 Sampling and Testing
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not exceed the following limits Maximum Permissible Percentage by Weight Removed by decantation AASHTO T 11 Clay lumps AHTD Test Method 302 Coal and lignite AASHTO T 113 Soft and flaky particles AHTD Test Method 302 All fine aggregate shall be free from injurious amount of organic impurities
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The thickness of sub base can range from 1″ to 2″ inches on light weight traffic areas like pathways and paver patios above the sub grade when a ABC is not required ABCM Aggregate Base Coarse is a hard pack sub base compaction material Contains a mix of crushed stone topsoil and dust
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The sample of fine aggregate shall consist of particle coarser than IS sieve and shall weight not less than 100g Sample of coarse aggregate shall be separated into different sizes using 10mm 20mm 40mm IS sieve The weight of the sample for different size shall be not less than those indicated below
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Clay Lumps and Friable Particles AASHTO T 112 Materials Finer than No 200 75 µm Sieve AASHTO T 11 Lightweight Pieces Less than 703 03 Aggregate for Hot Mix Asphalt Base Course Aggregate for HMA base course shall conform to Subsection Aggregate for Hot Mix Asphalt
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Fine Aggregate Fine aggregate/ coarse sand consists of natural sand crushed stone sand or crushed gravel stone dust It should be hard durable chemically inert clean and free from organic matter not containing any appreciable amount of clay balls or pellets and other harmful impurities i e alkaline salt mica decayed vegetation lumps
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aggregate shall be free from vegetation lumps or excessive amounts of clay and other objectionable substances 100 percent and a lower specification limit L of at least percent of the maximum density of laboratory specimens prepared from samples Aggregate base course will be accepted for density on a lot basis
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MATERIAL SPECIFICATIONS FOR AGGREGATE GRANULAR COURSE 901 1 SCOPE Granular Base Course A Layer of granular material placed below the bituminous Portland Cement sand and fines free from injurious quantities of sod roots clay lumps and friable particles organics or other Deleterious Material March 2024 No 901 I Page 4 of 10
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Clay Lumps Plastic Index Organic Material For the wearing course have no more than 50% retained between two consecutive sieves below the #4 sieve Note Crushed gravel or stone processed from coarse aggregate meeting requirements of AGGREGATE SPECIFICATION LIMITS SAMPLING AND TESTING GUIDE October 20 2024 See Specifications
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Place graded aggregate material in successive layers with a maximum layer thickness of 8 uncompacted inches to prevent segregation and with a maximum surface deviation of 1/2 inch in 10 feet Compact each layer to 98 percent or more of the laboratory maximum density in accordance with AASHTO T99 Method C Modified and T310
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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 joint sealants HMA patching and base layer aggregate or soil when processing crushed concrete coarse aggregate Limit contamination
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The gradation used in this study according to SCRB specification for base course SCRB 2024 as shown in Figure 1 View in full text Similar publications
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