"Method of Sampling Stockpile Aggregate." SIZE OF ORIGINAL SAMPLES The key to any sample program is to obtain a representative sample. A standard sampling method must be followed to obtain uniform samples. 2-2 The following is a list of recommended minimum sizes of composite

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Sampling from a stockpile Make sure that the sampling equipment is clean (shovel and sampling bag). Before sampling is taken, clear the surface of the stockpile. Push shovel right into the stockpile and take a full shovel sample. Take even shovel sizes at random over the whole stockpile until the sample bag is full (Normally 12 shovels).

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Tex-400-A, Sampling Flexible Base, Stone, Gravel, Sand, and Mineral Aggregates. – Requires building 4 sample pads from each quarter point of the stockpile, 16 sample pads in total for one stockpile. – Requires 1 sample from each sample pad, 16 sample bags or containers for each

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Aggregate Sampling Obtainingunbiasedfieldsamplesfromstockpilesis notoriouslydifficult,butitcanbedonewithcareand attentiontodetail.Abucketloadermakestheprocess

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Batching Samples • Fractionate each aggregate to No. 8 sieve –Recommended by Asphalt Institute. We do not like this method due to potential for fines to segregate • Fractionate each aggregate to No. 200 –If stockpile aggregates do not match what quarry expects to …

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SAMPLING AGGREGATE, FLEXIBLE BASE, AND STONE RIPRAP TXDOT DESIGNATION: TEX-400-A MATERIALS & TESTS DIVISION 3 – 5 EFFECTIVE DATE: APRIL 2021 3.2.16 Repeat Section 3.2.4 to 3.2.15 for each additional location as determined from Section 3.2.3. 3.3 Sampling procedure for aggregate from completed stockpiles using a shovel. 3.3.1 Use this procedure to sample completed …

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Aggregate Blending, Absorption & Specific Gravity 15 Fine Aggregate Specific Gravity • ASTM C128 – Dry aggregate – Soak in water for 24 hours – Spread out and dry to SSD – Add 500 g of SSD aggregate to pycnometer of known volume • Pre-filled with some water – Add more water and agitate until air bubbles have been removed

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Aggregate Sampling, Testing, and Quality Assurance 31 reducing samples of aggregates to testing sizes. Their specification includes standard proce- dures for sampling aggregates from a roadway, flowing stream, conveyor belt, stockpile, or truck to ensure …

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Scope. 1.1 This practice covers sampling of coarse and fine aggregates for the following purposes: 1.1.1 Preliminary investigation of the potential source of supply, 1.1.2 Control of the product at the source of supply, 1.1.3 Control of the operations at the site of use, and. 1.1.4 Acceptance or …

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AGGREGATE WAQTC AASHTO T 2 T2_short Aggregate 1-1 October 2011 SAMPLING OF AGGREGATES FOP FOR AASHTO T 2 (11) Scope This procedure covers sampling of coarse, fine, or a combination of coarse and fine aggregates (CA and FA) in accordance with AASHTO T 2. Sampling from conveyor belts, transport units, roadways, and stockpiles is covered. Apparatus

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aggregates (CA and FA) in accordance with AASHTO R 90-18. Sampling from conveyor belts, transport units, roadways, and stockpiles is covered. Apparatus • Shovels or scoops, or both • Brooms, brushes, and scraping tools • Sampling tubes of acceptable dimensions • Mechanical sampling systems: normally a permanently attached device that ...

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"5.9. Sampling from a Stockpile of Fine Aggregate Using a Sampling Tube (Alternate Method) Samples should be taken at random locations in the stockpile: three in the lower third, two in the middle, and one just below the upper third. (See Note 3) Overlying material on the sampling area should be cleared. The sampling personnel should

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Mar 16, 2020· Stockpile sampling. Perhaps the most common manual sampling method for aggregates is stockpile sampling. There are different approaches to collecting a sample in this fashion, but all methods exhibit the same issues to some degree or another. Stockpile sampling methods involve collecting material directly from the product pile. 1.

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sample as described in paragraph 4.2.1.1 above. 4.2.2 Sampling with pick and shovel 4.2.2.1 From the sides of a stockpile Using shovels, dig a groove from the top to the bottom of the stockpile. (See note 6.2) Remove all the material that has collected at the bottom of the groove as a …

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Collect a representative aggregate sample from the stockpile in accordance with ASTM D75, "Standard Practice for Sampling Aggregates." The minimum aggregate sample weight needed for the test depends on the nominal maximum size aggregate of the aggregate being tested. These minimum sample weights are outlined in "Table 1: Sample Size for ...

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SAMPLING OF AGGREGATE MATERIALS 1. SCOPE 1.1 The purpose of these guidelines is to outline procedures and requirements for sampling of granular, coarse, and fine aggregate materials for quality assurance testing. 2. GENERAL 2.1 Whether stockpile, delivery, or road sampling has been chosen, the procedure for obtaining a sample must be strictly ...

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A sample of coarse aggregate is sampled from an aggregate stockpile, stored in a sealed (watertight) plastic bag and sent to a laboratory for testing. A sub-sample of the larger sample is taken from the bag and immediately weighed; the mass is recorded as 5301 g. The aggregate is brought to SSD condition and weighs 5120 g in air and 3198 g when ...

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aggregates (CA and FA) in accordance with AASHTO T 2-91. Sampling from conveyor belts, transport units, roadways, and stockpiles is covered. Apparatus • Shovels or scoops, or both • Sampling tubes of acceptable dimensions • Mechanical sampling systems: normally a permanently attached device that allows a

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Sampling fine aggregate from a stockpile is somewhat simpler since it has a lower tendency to segregate: Insert sampling shovel at base and move vertically to obtain sample. These three steps are repeated at select points around the pile. A second method of sampling fine aggregate involves using a sampling tube. The tube, which is about 1 ¼ in ...

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Coarse aggregate samples must be representative of the aggregate and should be obtained as described in ASTM D75 or AASHTO T 2. After samples are collected from a stockpile, conveyor belt, bin, or other sources, it's time to prepare the specimens for splitting procedures.

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STOCKPILE SAMPLING Coarse Aggregate Stockpiles. Coarse aggregates are recommended to be sampled using the following procedure. 1) Locate the area of the stockpile from which hauling will begin. 2) Using a front-end loader, …

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Calculating Stockpile Capacity: Once the minimum storage capacities which will assure maximum mill output are known, the appropriate stockpile configuration must be determined. Stockpiles fall into two general categories: conical and elongated. Conical Stockpiles The conical stockpile is the simplest and easiest to analyze. The total stockpile capacity is given by: 3.14 (Tan A)R³ D/3000 ...

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Transcribed image text: 5.10 Samples of coarse aggregate from a stockpile are brought to the laboratory for determination of specific gravities. The following weights are found: Mass of moist aggregate sample as brought to the laboratory: 5,298 g Mass of oven dried aggregate: 5,216 g Mass of aggregates submerged in water: 3220 g Mass of SSD (Saturated Surface Dry) Aggregate: 5,227 g …

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In sampling stockpiles of fine aggregate (3/8 in. (minus 9.5 mm)), the outer layer, which may have become segregated, should be removed and the sample taken from the material beneath. The use of sampling tubes has proven to be satisfactory. Sampling tubes approximately 1 …

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Stockpile sampling techniques Two documents that provide useful guidance on the techniques for sampling of soils from stockpiles are: • Australian Standard 1141.3.1 Methods for sampling and testing aggregates, Method 3.1: Sampling – Aggregates • Cement Concrete & Aggregates Australia Guideline to SAMPLING for the Extractive Industry,

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the finished product conveyor belt or stockpile. Obtaining samples from the belt discharge is acceptable if the full production stream can be obtained with sufficient rapidity and safety. Production samples are taken during aggregate crushing and stockpile operations and can only be conducted or witnessed by HTCP certified QC personal.

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When sampling from a stockpile, you must obtain your composite sample from at least _____ elevations/locations of the stockpile. 3. When using a sampling tube on fine aggregates, you must obtain portions from _____ different locations. 5 or more. You must sample from a minimum of _____ locations when sampling from a conveyor belt. ...

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during sampling. 3.2.3.4 Do not use the aggregate on the surface of the stockpile as a part of the sample. 3.2.3.5 In each instance, dig a small trench or hole into the pile approximately 1 ft. deep and take the sample from the innermost part of the hole. 3.2.3.6 Take samples from these 3 points at several places around the stockpile and combine

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• Build stockpile with fixed height conveyors • Build stockpiles with trucks, loaders or dozers. 15 Segregation Segregation - Stacker Conveyor. 16 Segregation Segregation - Size and Shape •Size ranges •Coarse ... • Changes in the aggregate properties will cause changes

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STOCKPILE SAMPLING Coarse Aggregate Stockpiles. Coarse aggregates are recommended to be sampled using the following procedure. 1) Locate the area of the stockpile from which hauling will begin. 2) Using a front-end loader, dig into the stockpile and set aside a small pile of 10 to 15 t of material.

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