Field Materials Manual Introduction INTRODUCTION This manual has been developed to provide construction project personnel with information and guidance for field activities relating to materials
SAMPLING METHOD MB2 SAMPLING FROM A CONVEYOR BELT 1 SCOPE This method describes the procedure to be followed when samples are taken from a conveyor belt for the following purposes: crushed or natural material for the gravel layers of a road( basecourse subbase or selected layer) crushed and/or sieved-out single – sized
mobile aggregate conveyor belt – Mineral Processing Plant Starting with a single Telebelt truck-mounted conveyor Mobile Conveying Services has grown quickly to now have The aggregate conveyor belt is suitable for More detailed
SECTION 704 BASE Sieve Analysis AASHTO T27 Table 6 Sampling Aggregate from Calibrated Conveyor stream or belt cut AASHTO T2 -- Plasticity Index AASHTO T90 Table 3 Liquid Limit AASHTO T89 35 Maximum Samples of the finished product of the plant shall be obtained prior to or as the material leaves the conveyor belt for the bin or stockpile
This procedure covers sampling of coarse fine or a combination of coarse and fine aggregates (CA and FA) in accordance with AASHTO T 2-91 Sampling from conveyor belts transport units roadways and stockpiles is covered
Samples of materials obtaining segregated material and should be avoided for control of the production at the source or control of the work at the site of use are obtained by the 4 3 2 Sampling from the Conveyor Belt— manufacturer contractor or other parties responsible Select units to be sampled by a random method such for accomplishing
SAMPLING SOILS AND AGGREGATES (An Arizona Method) 1 SCOPE upslope from the point of sampling to prevent loose aggregate from sliding down into the sampling area SAMPLING FROM A CONVEYOR BELT 4 1 Sampling from a conveyor belt may be performed either while the
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Belt Sampling Belt sampling consists of taking samples of materials directly from conveyor belts The proper procedure is to: 1) Make sure that the belt is carrying a normal load of material that is not segregated 2) Have the plant operator stop the belt and use proper lock out procedures
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Procedures Manual Subject: SAMPLING FINE AND COARSE AGGREGATES Date: 2001 04 16 3 1 Sampling from the Conveyor Belt 3 2 Sampling from a Flowing Aggregate Stream (Bins or Belt Discharge) Select samples by random method from the production
This method is applicable to determining asbestos content of serpentine aggregate in storage piles on conveyor belts and on surfaces such as roads shoulders and parking lots 2 0Definitions: 2 1Bulk Sample - A sample of bulk material 2 2Grab Sample - A sample taken from a volume of material
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SAMPLING BITUMINOUS PAVING MIXTURES (AASHTO T168) Select three sampling methods PROCEDURE Sampling 1st 2nd 1 Select units to be sampled by an approved random method? a Sampling from conveyor belt: (1) Conveyor belt stopped? (2) Select at least three areas with approximately equal size? (3)
conveyor belts with emergency stop cables that extend the entire length of the conveyor belt to allow access to the cable from any point along the belt • Ensure that conveyor controls or power sources can accept a lockout/tagout device to allow safe maintenance Adapted from: Safeguarding Equipment and
Figure 9-1 Discharge Sampling of Belt Belt Sampling Belt sampling consists of taking samples of materials directly from the conveyor belts This may be done by a mechanical sampling device (Figure 9-2) or manually The proper procedure for manual belt sampling is designated in AASHTO T 2 and includes the following:
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31-10-2013T2_short_15 docx Aggregate 9 - 1 Pub October 2015 SAMPLING OF AGGREGATES FOP FOR AASHTO T 2 Scope This procedure covers sampling of coarse fine or a combination of coarse and fine aggregates (CA and FA) in accordance with AASHTO T 2-91 Sampling from conveyor belts transport units roadways and stockpiles is covered Apparatus
This procedure covers sampling of coarse fine or a combination of coarse and fine aggregates (CA and FA) in accordance with AASHTO T 2-91 Sampling from conveyor belts transport units roadways and stockpiles is covered
7-11-2015Device raking off material from a trough belt for sampling
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SAMPLING BITUMINOUS PAVING MIXTURES (AASHTO T168) Select three sampling methods PROCEDURE Sampling 1st 2nd 1 Select units to be sampled by an approved random method? a Sampling from conveyor belt: (1) Conveyor belt stopped? (2) Select at least three areas with approximately equal size? (3)
FINE AGGREGATE SAMPLING TUBE A tube with an inside diameter of 2 inches (50 mm) to 3-1/2 inches (89 mm) and a minimum length of 30" (762 mm) should be used for sampling concrete sand COAL SCUTTLE BUCKET A coal scuttle bucket or an approved alternate should be used to catch a cross sectional area of material being discharged from a conveyor belt
NOTE 4—Sampling the initial discharge or the final few tons from a bin or conveyor belt increases the chances of obtaining segregated material and should be avoided 5 3 2 Sampling from the Conveyor Belt—Select units to be sampled by a random method such as Practice D3665 from the production Obtain at least three approximately equal
conveyor safety powerpoint presentations conveyor safety powerpoint presentations As a leading global manufacturer of crushing grinding and mining equipments we offer advanced reasonable solutions for any size-reduction requirements including quarry aggregate and different kinds of minerals
Aggregate sizing and shape determination using digital image processing Center For Aggregates Research (ICAR) Sixth Annual Symposium Proceedings St Louis Missouri April 19-20 pp 195-203 AGGREGATE SIZING AND SHAPE DETERMINATION USING DIGITAL IMAGE PROCESSING N H MAERZ such as on conveyor belts or at transfer
4 2 Serpentine Aggregate Conveyor Belts 4 2 1 Sampling of aggregate off a conveyor belt requires a hand trowel a small brush and a dust pan 4 2 2 Two templates as shown in Figure 2 are needed to isolate material on the conveyor belt 4 2 3 An automated belt sampler may be used
Items to Consider When Choosing Conveyor Belt Scales Posted November 4 2015 by Kevin Hill filed under conveyor belt scales Conveyor Belt Scales more commonly known as Belt Scales are used to weigh materials while being carried on conveyor belts
MECHANICAL SAMPLING SYSTEMS Over the past 20 years materials handling facilities have become larger with higher throughput capacity and faster conveyor belt speeds This fact coupled with the increased emphasis on accuracy and precision has led to a proliferation of mechanical sampling systems throughout the quality chain
a list of available sampling methods is listed as follows: 1 sampling a moving stream by mechanical cutter devices 2 sampling a stopped conveyor belt by sampling frame 3 sampling from stockpiles by front end loader – remove and mix 4 sampling from stockpiles by front end loader – remove 5 sampling from stockpiles by front end loader –
Sampling Practices for Aggregate Materials Sources and Sampling Design 6 Minimum of 3 random grab samples per 1000 tons Sampling Practices for Aggregate Materials Equipment and Procedures • Storage piles‐sloughing effect – Sampling tubes round point shovels front loaders • Conveyor belts
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