ATT-12, Part II 1.0 Scope

ATT-12/96, EXTRACTIONPart II, Centrifuge Method

Method "A" Filterless ExtractionMethod "B" Bowl Extraction

1.0 SCOPE

This method covers the procedures for determining the asphalt content of asphaltmix using the filterless extraction and filterless centrifuge method or the bowl typefiltered centrifuge and filterless centrifuge method.

2.0 EQUIPMENT

extraction apparatus(if applicable)bowl centrifuge apparatus(if applicable)filterless centrifuge apparatus20 000 Fm minus sieve analysis equipment (ATT-26, Section 2.0)

electronic balance - capable of reading to 0.1 g and having an accuracy of at least0.01% of the sample mass, e.g. for a 2000 g sample weight, the balance must beaccurate to 0.2 g. The balance must be operated and calibrated as permanufacturer's recommendations.

drying pans tablespoon grocer scoops,1-large and 1-small metal pail 2- core trimmers large mixing pangloves detergent plastic wash bottleputty knife respirators extraction solvent

Data Sheets:Core Density, Extraction and Sieve Analysis, MAT 6-79Mix Asphalt Content, MAT 6-101 (for quality control testing only)

3.0 PROCEDURE

This test is performed on samples of at least 2000 g for Quality Assurance Testingand Quality Control Testing where a sieve analysis is required. Smaller samples maybe used for Quality Control tests where quick results are required however, theresults cannot be used to show cause for an Appeal.

3.1 Preparing Samples for Extraction Test

3.1.1 Cores

Coring degrades the aggregate. Therefore, for accurate gradation results, the coreoutside cut rock must be removed with core trimmers. The trimming procedure isdescribed later in this section.

If the cores are for quality assurance testing, additional cores(s) may have to beobtained adjacent to the segment core so that after sawing and trimming the samplemeets the minimum 2000 g extraction test requirement. After the density of thesegment core is determined as described in ATT-7, the uncut rock portion of the coremix is combined with the adjacent core(s) uncut rock mix portions and the entiretrimmed sample is extracted.

ATT-12, Part II 3.1.1 Preparing Cores forExtraction Test

For appeal testing, more than one core may be required for each location. The setof cores for each location is considered one sample. The uncut rock mix portions ofthe trimmed cores are combined and processed.

Use the following table to determine the minimum number of cores required to obtaina minimum 2 000 g extraction sample using 127 and 114 mm inside diameter coretrimmers. A similar table should be available if trimmers of different diameters areused.

TRIMMED CORE REDUCTION TABLE

Core Estimated Estimated Trimmed Weight No. TotalThickness Core of Estimated

Weight Cores SampleWeight

127mm 114mm 100mmTrimmer Trimmer Trimmer

100 4060 2235 1 2235

90 3655 2375 1 2375

80 3250 2110 1 2110

70 2840 1280 2 2560

60 2435 1095 2 2190

50 2030 1115 2 2230

40 1625 1055 2 2110

30 1220 795 3 2385

20 810 525 4 2100

Estimated weight will vary with the core density.

1. For each core, use a masonry saw to saw off the lift required for testing. Sawright at the tack line to eliminate tack and/or seal coat chip contamination.Avoid cutting excess material as it contributes to the degradation of thesample.

If a core is obtained from a lower lift, sawing may be required at the top andbottom of the core(s) to eliminate the tack coat.

2. Label and tare two drying pans and record the pan number and weight inlines "G" and "I" of form MAT 6-79, as shown in Figure 1.

If additional material is needed to meet the required minimum sample size of2 000 grams, number and tare another pan and record the number andweight in line "R".

3. After the wet density determination (if required), place the segment core inthe tared pan recorded in line "I".

ATT-12, Part II 3.1.1 Preparing Cores forExtraction Test (Cont'd)

4. Heat the sample in the oven set at 130EC ± 5EC for about 20 minutes. Thistime may vary but use the minimum time requirement which allows thespecimen to be easily trimmed using a core trimmer. Overheated samplesmay stick to the pan, trimmers, putty knife and mixing spoon.

5. If additional material is needed to obtain the trimmed minimum sample size,heat the additional core(s) in separate pan(s) for about 20 minutes. Use thetared pan from line "R" as one of the pans, because after trimming, all theuncut rock mix from the additional core(s) will be combined in this tared pan.

6. Turn on the stove burner and centre the base of the required core trimmer onthe burner flame for a few minutes to heat the trimmer.

7. Centre the heated trimmer on the heated core (allow equal clearance on allsides of the core).

8. Hold the trimmer vertically by its handle, then press it down through the coreuntil it reaches the bottom of the pan. Apply a slight twist if the heated coreis difficult to penetrate. Leave the trimmer in the core.

9. Use a putty knife and mixing spoon to remove from the pan all the outside cutrock mix. If the core density is required, place this material in the tared panrecorded in line "G". Discard this material if only the extraction and gradationtests are required.

10. Scrape off the mix adhering to the trimmer into the appropriate tare pan. 11. If additional core(s) were required to obtain the minimum 2000 g sample for

asphalt content and gradation, then:

a) Remove from each sample the cut rock mix portion as described insteps 7 to 11.

b) Then combine the uncut rock mix portions in the tared pan recordedin line "R". Discard the outside cut rock mix portions.

12. Use a putty knife to break up the uncut rock mix portion of each sample andclean the material adhering to the putty knife back into the pan(s).

13. Place the pan(s) back in the oven and dry the sample to constant weight.This is verified as follows:

a) Oven dry the sample for at least four hours then weigh.

b) Replace the sample in the oven for approximately one hour and reweigh.

c) Repeat step (b) until two consecutive weights are the same.

ATT-12, Part II 3.1.1 Preparing Cores forExtraction Test (Cont'd)

FIGURE 1

ATT-12, Part II 3.1.2 Preparing Marshalls

14. Weigh the hot mix in the tared pan(s) and record as Dry Wt. of Uncut RockCore Mix + Pan in line "H" (for tare pan entered in line "I"), and line "Q" (fortare pan entered in line "R"), if applicable.

15. If required, calculate the Dry Wt. of Uncut Rock Core Mix (line "S") of theadditional cores using the formula:

= Dry Wt. of Uncut Rock Core Mix and Pan (line "Q") - Wt. of Tare Pan (line "R")

16. Calculate the Total Dry Wt. of Uncut Rock Core Mix (line "T") using theformula:

= Dry Wt. of Uncut Rock Core Mix (line "S") Plus

Dry Wt. of Uncut Rock Core Mix and Pan (line "H") - Wt. of Tare Pan (line "I")

17. Proceed to Section 3.2, Extraction

3.1.2 Marshalls

If the extraction asphalt content of field formed Marshall specimens is required, usethe two test series briquettes. Prepare the specimens for the extraction test asfollows:

1. If testing for quality control purposes and form MAT 6-101 is used:

a) Label and tare a drying pan. Record in line "H" the pan number andweight, as shown in Figure 2.

2. After the wet density determination, place the specimens in the tared pan andput the pan in the oven set at 130 EC ± 5 EC.

3. After the Marshall specimens have been in the oven for about half hour,remove the pan from the oven and break up the specimens with a putty knife,cleaning off the material adhering to the knife.

4. Repeat steps 13 of Section 3.1.1, Cores.

5. Record the dry weight of the mix and tare pan in line "Q" of form MAT6-79.

6. Proceed to Section 3.2, Extraction.

ATT-12, Part II 3.1.3 Mix

3.1.3 Mix

1. Obtain 3/4 of a pail of representative mix as directed in ATT-37, SAMPLINGMIXES.

2. Place the mix into a mixing pan and use a heated large grocer scoop tothoroughly mix it.

3.1.3.1 Oven Dried Sample Method (Fresh Mix, Reclaim or Liquid AsphaltMixes)

1. Label and tare a drying pan. Record the weight and pan number in line "H"of form MAT6-101 as shown in Figure 2.

2. Use a clean heated scoop to place a minimum of 2000 g of the mix in thepan.

3. Use the putty knife to clean the mix off the scoop into the pan.

4. Place the drying pan with the mix in the oven set at 130EC ± 5EC and recordthe time the sample was placed in the oven.

5. Dry the sample to constant weight. This is verified as follows:

a) Oven dry the mix sample for at least four hours then weigh.

b) Replace the sample in the oven for approximately one hour and reweigh.

c) Repeat step (b) until two consecutive weights are the same.

7. Weigh the pan containing the mix and record as Dry of Mix + Pan (line "J").

8. Subtract line "H" from line "B " and record as Wt. of Dry Mix line "J".1

9. Proceed to Section 3.2, Extraction

Moisture Content (%) ' Wt. of WaterWt. of Dry Sample

× 100%

Wt. of Dry Mix (g) ' Wt. of Moist Mix100 % Moisture Content of Mix in %

× 100%

ATT-12, Part II 3.1.3.2 Calculated SampleDry Weight Method

3.1.3.2 Calculated Sample Dry Weight Method

1. Label and tare a two drying pans. Record the weights and pan numbers inline "D" and line "H" of form MAT6-101 as shown in Figure 2. One tare panwill be used for the moisture content sample and one for the extractionsample.

2. Use the heated grocer scoop to place a minimum of 2000 g of mix in each ofthe tared pans. Ensure the mix is level and evenly distributed over thebottom of the pan.

3. While the scoop is still hot, use the putty knife to clean off the mix adheringto the scoop and place it in the appropriate pan.

4. Weigh the samples and record as Wt. of Moist Sample + Pan(line "A" moisture sample) and (line "G" extraction sample).

5. Calculate the Wt. of Moist Mix (line "I") for the extraction sample as follows:

= (Wt. of Moist Mix and Pan ) - (Wt. of Pan )

6. Place the moisture content sample in the oven and dry it to a constant weightas described in Section 3.1.3.1 step 5.

7. Record the time the sample was last removed from the oven and calculatethe drying time.

8. Weigh the hot sample and record as Wt. of Dry Sample + Pan (line "B").

9. Calculate the Weight of Water removed from the mix (line "C"):

Wt. of Water (g) = (Wt. of Moist Sample and Pan) - (Wt. of Dry Sample and Pan)

10. Determine the oven dry weight of the sample (line "E") as follows:

Wt. of Dry Sample (g) = (Wt. of Dry Sample and Pan) - (Wt. of Pan)

11. Calculate the Moisture Content to the nearest 0.01 percent (line "F") of thesample using the formula:

If the Mix Moisture Content and Marshall Density Data form, Mat 6-80, wasused, transfer the % Moisture to line "F" of form MAT6-101.

12. Calculate the Weight of Dry Mix (line "J") using the formula:

MIX ASPHALT CONTENT AND SIEVE ANALYSISPROJECT DISTRICT

CONTRACT NO. DATE SAMPLED

LOT NO. SAMPLE NO. TIME SAMPLED

MIX MOISTURE CONTENT EXTRACTION DATA

A. WT. OF MOIST SAMPLE + PAN g K. DRY WT. OF MIX LINE "E" or LINE "J" g

B. WT. OF DRY SAMPLE + PAN g L. EXTRACTED DRY WT. OF AGGREGATE + PAN g

C WT. OF WATER A - B g M. WT. OF TARE PAN (NO. ) g

D. WT. OF TARE PAN (PAN NO.___) g N. EXTRACTED DRY WT. OF AGGREGATE M - L g

E. WT. DRY SAMPLE B - D g O. WT OF CENTRIFUGE DRY FINES AND BEAKER g

F. MIX MOISTURE CONTENT 100 C/E % P. WT. OF BEAKER NO. ) g

TIME PLACED IN OVEN h-min Q. WT OF CENTRIFUGED FINES O-P g

TIME TAKEN OUT OF OVEN h-min R. TOTAL WT. OF DRY AGG. N + Q g

DRYING TIME h-min S. WT. OF ASPHALT K - R g

TIME EXTRACTION STARTED h-min T. ASPHALT CONTENT 100 S/R %

TIME EXTRACTION COMPLETED h-min U. ASPHALT CONTENT CORRECTION FACTOR %

EXTRACTION TIME h-min V. CORRECTED ASPHALT CONTENT T + U %

WT. OF SAMPLE USING WT. OF SAMPLE USINGCALCULATED SAMPLE DRY WEIGHT METHOD OVEN DRIED METHOD

G. WT. OF MOIST MIX + PAN g B . WT. OF DRY MIX + PAN g1

H. WT. OF PAN g H. WT. OF PAN (PAN NO.___) g

I. WT. OF MOIST MIX G - H g J. WT. OF DRY MIX B - H g1

J. WT. OF DRY MIX 100 I / (100 + F) g

SIEVE ANALYSIS WT. OF DRY AGGREGATE (R) _______________________ g RECORD CALCULATIONS

SIEVE SIZE WEIGHT WEIGHT PERCENT DESIGNFm RETAINED PASSING PASSING LIMITS

g g % %

16 000

12 500

10 000

5 000

1 250

630

315 DATE TESTED

160 DATA CHECKED BY

80 REMARKS

TARE PAN DIFFERENCE % DIFFERENCE MAXIMUM

X - W 100 Y / XDIFFERENCE

TOTAL WEIGHT (W)

DRY WASH WT. (X) 0.5 %(Y) MAT6-101/96

FIGURE 2

ATT-12, Part II 3.2 Filterless Extraction

3.2 Extraction

3.2.1 Method "A"Filterless Extraction

1. Assemble the equipment as required.

2. Set the extraction basket in a clean drying pan. The drying pan is used to trapspilled mix.

3. Set the pan containing the mix adjacent to the pan with the basket.

4. Use the tablespoon to fill the basket with the extraction sample.

5. Place the basket on top of the basket stand, in the battery jar.

6. Put on your respirator. In the fume cabinet, use the wash bottle containingchlorinated extraction solvent to rinse the spoon into the mix pan.

7. Use the wash bottle to flush the contents of the mix pan into the extraction basket.

8. Place the condenser on the battery jar.

9. Place a wire gauze on each burner. Centre the battery jar on the burner.

10. Ensure the condenser is on the battery jar, then light the burner.

11. Record the Time Extraction Started on the bottom of the left column ofdata sheet MAT 6 - 79 or MAT 6-101.

12. Turn the burner to low heat until the battery jar and the chlorinatedextraction solvent are hot. Rapid changes in jar temperature may crackbattery jars.

13. Open the water tap so the flow of water keeps the condenser cool.

14. Turn the heat on full under each jar until the chlorinated extraction solventvapours start to condense and drip from the condenser. At this point,adjust the heat until there is a constant flow of chlorinated extractionsolvent from the condenser.

15. Keep the sample in the basket continually saturated with chlorinatedextraction solvent.

ATT-12, Part II 3.2.1 Filterless ExtractionCont'd

16. Adjust the water flow throughout the test to keep the condenser cool.

17. Allow the refluxing action to continue in the jar until the wash from thebasket is clear. At this point, turn off the heat.

NOTE: The extraction time depends on the asphalt content and gradationof the mix. It is approximately 2.0 to 2.5 hours for ACP plant mix.Reclaimed or recycled mixes require more time. Cutbacks andemulsified asphalt mixes may require less extraction time. Limetreated aggregates may need 4 hours. Check the colour of thechlorinated extraction solvent periodically until there is nonoticeable change in colour. For very dirty aggregates, the flow ofsolvent from the basket may appear clear even though asphalt isstill being extracted. This is caused by chlorinated extractionsolvent condensing on the outside of the basket and flowing downto the bottom, diluting the stream and creating an apparent clearstream.

17. Allow the chlorinated extraction solvent to stop condensing and the extract tocool to room temperature.

18. Record the Time the Extraction was Completed and calculate the ExtractionTime on the bottom of the left column of MAT 6-79.

19. Label and tare a drying pan and record the pan number and weight in line "V"of form MAT 6 - 79 or line "M" of form MAT 6-101.

20. Place the pan in the fume cabinet.

21. Put on the gloves and respirator and remove the condenser from the jar.

22. Remove the extraction basket and basket stand from the jar.

23. Replace the condenser on the battery jar.

24. Invert the basket and basket stand in the drying pan, emptying the contents.

25. Brush all fines off the extraction basket and basket stand into the pan.

26. While the pan is in the fume cabinet, gently stir the aggregate in the dryingpan to remove some of the chlorinated extraction solvent.

27. Ensure the oven is set at 130 C ± 5 C and place the drying pan with theo oaggregate in the oven.

ATT-12, Part II 3.2.2 Bowl Extraction

3.2.2 Method "B" Bowl Extraction

1. Set the bowl in a clean drying pan. The drying pan traps spilled mix.

2. Set the pan containing the mix adjacent to the pan with the bowl.

3. Use the tablespoon to fill the bowl with the extraction sample.

4. Place the bowl into the centrifuge.

5. Put on your respirator. In the fume cabinet, use the wash bottle containingchlorinated extraction solvent to rinse the spoon (and the beaker, if required)into the mix pan.

6. Use the wash bottle to flush the contents of the mix pan into the extractionbowl.

7. Cover the sample with extraction solvent. (approx. 400 ml)

8. Place the lid on the bowl. A filter may be used but is not required. If a filteris used it should be dried in the oven and included with the pan tare in step13 below.

9. Place a container under the centrifuge effluent discharge to catch the solventthrown from the bowl.

10. Start the centrifuge at 250 rev/min. Once the flow has reduced significantly,increase the speed to 1000 rev/min. until the flow stops.

11. Stop the centrifuge and add 200 ml of solvent.

12. Continue steps 10 and 11 until the solvent appearance is a light straw colour.

13. Label and tare a drying pan and record the pan number and weight in line "V"of form MAT 6 - 79 or line "M" of form MAT 6-101.

14. Place the pan in the fume cabinet.

15. Put on the gloves and respirator and remove the bowl from the centrifuge.

16. Carefully transfer the aggregate from the bowl into the pan.

17. Brush all fines off the bowl into the pan.

18. While the pan is in the fume cabinet, gently stir the aggregate in the dryingpan to remove some of the chlorinated extraction solvent.

19. Ensure the oven is set at 130 C ± 5 C and place the drying pan with theo oaggregate in the oven.

ATT-12, Part II 3.2.2 Fines Correction

3.3 Fines Correction using High Speed Centrifuge

1. Label and tare a hot beaker. Record the beaker weight and number in line "Y"of form MAT 6-79 or line "P" of form MAT 6-101 .

2. Insert the hot beaker into the holding head, as directed in MEB 2, EquipmentSection E.3.

3. Place the fine sieve (80Fm) in the sieve funnel.

NOTE: It is very important that the fines sieve (80Fm) be used as the effluent willcontain some plus 80 Fm material. The sieve analysis procedure assumesonly minus 80 Fm material in the beaker and therefore the gradation of thesample will be effected if the beaker contains plus 80 Fm material.

4. Place an empty uncovered plastic container underneath the outlet and turnthe centrifuge on.

5. With the unit rotating at full speed, set the tap to the calibration mark. Thiswill control the flow rate so that the output is 0.1 to 0.4 litres per minute,preventing the fines from being washed into the plastic container.

6. Put on the respirator and pour the cool extract from the filterless extractionthrough the sieve funnel. If the extract is not at room temperature, a highamount of chlorinated extraction solvent will be lost due to vaporization.

7. Thoroughly flush all the extract from the battery jar into the sieve funnelusing a wash bottle containing chlorinated extraction solvent. No finesshould be left in the battery jar.

8. When the extract level falls below the fine sieve in the sieve funnel,thoroughly wash the fines collected on the screen with the wash bottle.

9. Air dry the fine sieve and brush the retained material into the pancontaining the oven dry aggregate from the extraction (step 24 of Section3.2.1, Filterless Extraction or step 16 of Section 3.2.2, Bowl Extraction).

10. When all the extract is centrifuged, flush clean chlorinated extractionsolvent through the sieve funnel until it flows clean into the plasticcontainer underneath the outlet.

11. Cover the plastic container to minimize vaporization of chlorinatedextraction solvent.

12. Allow the centrifuge run for a few minutes to evaporate the chlorinatedextraction solvent within the beaker.

ATT-12, Part II 3.4 Fines Correction Cont'd

13. Turn off the centrifuge and allow the beaker to coast to a stop. This willprovide sufficient time for excess vapours to clear. The brake can be usedto slow the centrifuge a maximum of 5 times per hour.

14. Withdraw the beaker and place it in the drying pan containing theextracted aggregate.

15. Place the pan in the oven set at 130 C ± 5 C and oven dry the aggregateo oand beaker to a constant dry weight.

16. Remove the beaker from the pan and weigh the beaker and its contents.Record as Wt. of Centrifuged Dry Fines + Beaker (line "X" of form MAT 6-79 or line "O" of form MAT 6-101).

17. Weigh the hot pan and its contents. Record as Extracted Dry Wt. ofAggregate + Pan (line "U" of form MAT 6-79 or line "L" of form MAT 6-101).

18. Calculate the Extracted Dry Wt. of Aggregate (line "W" of form MAT 6-79or line "N" of form MAT 6-101) as follows:

= Extracted Dry Wt. of Aggregate and Pan - Wt. of Tare Pan

19. Calculate the Wt. of Centrifuged Dry Fines (line "Z" of form MAT 6-79 orline "Q" of form MAT 6-101) as follows:

= Wt. of Centrifuged Dry Fines and Beaker - Wt. of Beaker 20. At the beginning of a project or when results are suspect, the high speed

centrifuge extract should be checked to ensure complete removal of fines.Run the extract through the centrifuge a second time, using a new beaker.Only traces of fines should be separated in the process.

Appreciable quantities of fines in the checking beaker may be caused by thefollowing:

a) Speed of the centrifuge was below minimum of 9000 rev/min.

b) Output was too fast. Reduce the flow rate of the extract.

c) A distorted beaker was used. Always check beaker before use.

d) Excessive fines in the extract (greater than 50 g) ran through thebeaker. To correct, distribute the extract over several beakers.

21. Clean the beaker with the stiff bristle brush, discarding the material.

Asphalt Content % ' Wt. of Extracted AsphaltTotal Wt. of Dry Aggregate

× 100%

ATT-12, Part II 3.4 Corrected Asphalt Content

3.4 Corrected Extraction Asphalt Content

1. Determine the Total Weight of Dry Aggregate (line "AA" of form MAT 6-79 orline "R" of form MAT 6-101) using the formula:

= Extracted Dry Wt. of Aggregate + Wt. of Centrifuged Dry Fines

2. Determine the Weight of Extracted Asphalt (line "BB" of form MAT 6-79 or line"S" of form MAT 6-101) as follows:

= Total Dry Wt. of Uncut Rock Core Mix (Dry Mix) - Total Wt. of Dry Aggregate

3. Calculate the Extraction Asphalt Content to the nearest 0.01% (line "CC" ofform MAT 6-79 or line "T" of form MAT 6-101) using the formula:

4. Enter the Extraction Correction Factor , as determined in ATT-12,Part III, on line "DD" of form MAT 6-79 or line "U" of form MAT 6-101 .

5. Calculate the Corrected Asphalt Content (line "EE" of form MAT 6-79 orline "V" of form MAT 6-101) as follows:

= Extraction Asphalt Content + Extraction Correction Factor

3.5 Sieve Analysis

1. Transfer the Total Weight of Dry Aggregate (line "AA" of form MAT 6-79 orline "R" of form MAT 6-101) to the top of the Sieve Analysis Data section ofthe form.

2. Perform a wash sieve analysis on the extracted aggregate, as directed inATT-26.

ATT-12, Part II 4.0 Hints and Precautions

4.0 Hints and Precautions

1. Fumes from chlorinated extraction solvent are toxic. Perform the test in anappropriate ventilation system. Use the lab fume cabinet for the filterlessextractions and the centrifuge fume cabinet/case for centrifuge extractions.

2. Respirators and gloves should be worn when handling chlorinatedextraction solvent (e.g., pouring the solvent). Each person should have apersonal respirator and a pair of gloves. The proper respirator for thehazard must be used. Proper use of dust and chemical respirators isdiscussed in the applicable manufacturers equipment manuals.

3. Respirators must be stored in plastic bags and away from all fumes so thatfilters do not accumulate fumes from the air.

4. Chlorinated extraction and cleaning solvent containers must be sealedwhen not in use. Battery jars containing chlorinated extraction solventmust be kept covered and in a fume cabinet when not in use. Thisprevents loss due to evaporation and minimizes exposure to the solventfumes.

5. The wire mesh of the extraction basket should be inspected before testingbegins, to ensure that it is clean. A dirty basket may change the weight ofaggregate obtained during the test.

6. Chlorinated extraction solvent or an approved substitute must be used. Some of the approved substitutes are flammable. Substitutes, such as varsol, must not be used, as they will explode.

7. Beakers must be handled with care. Do not tap the beakers whenremoving fines. Deformation of the beaker may cause a loose fit in theholding head, resulting in incomplete separation of fines.

8. Use a maximum of 5 brakes per hour to slow the centrifuge. An excessiveamount of braking will change the polarity of the motor and reverse thecentrifuge's direction of rotation.

9. Keep the centrifuge upright when it is being moved and transported, If youdon't oil leaks out of the spindle.

10. Use a brush and hot soapy water to clean beakers.

11. Ensure that lime-treated aggregate samples are identified as "lime treated"on the sample identification form, when submitting samples to aLaboratory.

ATT-12, Part II 4.0 Hints and Precautions

12. The First Aid and Precautions and Storage guidelines for each extractionsolvent are outlined on a Material Safety Data Sheet. Employees usingextraction solvents are responsible for, and must be aware of, theinformation contained in the Chemical Safety Data Sheet. Chemical SafetyData Sheets can be obtained from the supplier. A summary of first aid andstorage guidelines for chlorinated solvents follows:

REACTIVITY AND STORAGE - Chlorinated extraction solvent

INCOMPATIBLE Water, Oxidizing Material, chemically active metals andWITH aluminum.

PRECAUTIONS Avoid heat and open flames. Store in a cool, wellventilated area. Keep container tightly closed.

FIRST AID - Chlorinated Extraction Solvent

INHALATION Remove to fresh air. Give artificial respiration if necessary.

INGESTION Give 2 or 3 glasses of milk or water. Keep warm and at

EYES 15 minutes, lifting upper and lower lids occasionally. Obtain

SKIN persists.

Have trained personnel give oxygen if breathing is difficult. Keep warm and at rest. Obtain immediate medical attention.

rest. Obtain immediate medical attention.

Immediately flush with a gentle stream of water for at least

medical attention if irritation persists after flushing.

Wash exposed skin thoroughly with water while removingcontaminated clothing. Obtain medical attention if irritation

Please read the Materials Safety Data

Sheet before you use extraction solvent.