MINIMUM STANDARDS FOR TESTING SOILS AND FLEXIBLE BASE MATERIALS

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1 Test Procedure for MINIMUM STANDARDS FOR TESTING SOILS AND FLEXIBLE BASE TxDOT Designation: Tex-198-E Effective Date: March SCOPE 1.1 Use this procedure to meet the requirements for the calibration and inspection of laboratory equipment used to perform testing of soils and flexible base materials. The procedures included here are those relevant to daily operations or required under Contract. This test method establishes procedures and interval requirements for all applicable equipment. 2. DOCUMENTATION 2.1 Maintain documents and all other pertinent information using approved hard copy or electronic forms for all testing equipment calibrated. Documentation must include the following information for each piece of equipment: name of equipment; serial number, or other identification number; calibration or verification interval; name of technician performing calibration or verification; dates of calibration, previous calibration, and next calibration; procedure used to calibrate equipment; and results and all pertinent information from the calibration procedure. 2.2 Document information from visual inspections using Form 2651, Visual Inspection Equipment Checklist, 100-E Series Procedures. 3. CALIBRATION OR VERIFICATION 3.1 All equipment that is required to perform each test procedure below must be available in the laboratory and in good working condition. 3.2 In addition to the intervals specified below, prior to use, calibrate or verify the calibration of scales, soil compactors, compression machines, and ovens after each time they are moved. CONSTRUCTION DIVISION 1 25 EFFECTIVE DATE: MARCH 2017

2 3.3 Perform the calibration or verification of equipment listed in the tables below. Table 1 Tex-100-E, Surveying and Sampling Soils for Highways Metallic tape, 100 ft. (30 m) long Post hole digger, shovel, prospector s pick, other hand tools Jack hammer and air compressor Engineer s level and level rod Stakes Ruler, 6 ft. (2 m) Power drill rig with core and/or auger attachments Sample bags and moisture cans for disturbed samples Materials to maintain moisture content and boxes for packing undisturbed cores Soil auger Sample splitter or quartering cloth Table 2, Preparing Soils and Flexible Base Materials for Testing Verify wire cloth for Balance, Class G20, minimum capacity of 80 lb. (36 kg). Drying oven, maintained at 140F (60C) and 230 F (110 C) Verify calibration record Tex-901-K Verify temperature Tex-927-K Crusher (optional) Mechanical pulverizer (optional) Mortar and pestle Scoop Small siphon tube (optional) Sample containers, metal pans, cardboard cartons Filter paper, non-fibrous CONSTRUCTION DIVISION 2 25 EFFECTIVE DATE: MARCH 2017

3 Sample splitter, quartering machine, or quartering cloth Dispenser cup Mechanical mixer (stirring device) Plaster of paris molds (optional) Table 3 Tex-102-E, Determining Slaking Time Apparatus listed in Table 4 Tex-103-E, Determining Moisture Content in Soil Materials Drying oven, maintained at 230 9F (110 5C) Verify temperature Tex-927-K Microwave oven Balance, Class G1 for specimens with a mass of 200 g or less, Class G2 for specimens with a mass greater than 200 g Specimen containers and close fitting lids for small specimens Verify calibration record Tex-901-K Specimen containers for microwave ovens Container handling apparatus Desiccator cabinet or jar containing indicator silica gel or anhydrous calcium sulfate Heat sink, for microwave ovens Table 5 Tex-104-E, Determining Liquid Limit of Soils Drying oven, maintained at 230 9F (110 5C) Balance, Class G1, minimum capacity of 100 g Verify temperature Tex-927-K Verify calibration record Tex-901-K Porcelain mixing dish, 4 5 in. diameter CONSTRUCTION DIVISION 3 25 EFFECTIVE DATE: MARCH 2017

4 Spatula Grooving tool Check dimensions Procedure 5 Liquid limit device Check wear and dimensions Procedure 6 Height of drop metal gage block Check height NA Spray bottle Weighing dishes, non-absorbent with lids Table 6 Tex-105-E, Determining Plastic Limit of Soils Drying oven, maintained at 230 9F (110 5C) Balance, Class G1, minimum capacity of 100 g Verify temperature Tex-927-K Verify calibration record Tex-901-K Porcelain mixing dish (4 5 in. diameter) Spatula Plastic limit rolling device and paper Weighing dishes Plaster of paris disks Rolling surface, non-absorptive, light texture ( in.) Table 7 Tex-107-E, Determining the Bar Linear Shrinkage of Soils Drying oven, maintained at 230 9F (110 5C) Balance, Class G1, minimum capacity of 200 g Verify temperature Tex-927-K Verify calibration record Tex-901-K Porcelain mixing dish ( in) diameter Spatula Straightedge Check planeness and length ASTM D698 or D1557 Grooving tool Check dimensions Procedure 5 Bar linear shrinkage mold Check dimensions Procedure 7 Number 20 engineer scale or other suitable rule CONSTRUCTION DIVISION 4 25 EFFECTIVE DATE: MARCH 2017

5 Table 8 Tex-108-E, Determining the Specific Gravity of Soils Volumetric flask, 500 ml Balance, Class G1, minimum capacity of 800 g Verify calibration record Tex-901-K Hot plate or sand bath Constant temperature water bath Verify temperature settings Procedure 2 4 Thermometer, calibrated between -5F and 110F by 2F intervals (-15C and 43C by 1C intervals) Visual inspection Calibrate/verify temperature Tex-926-K Procedure 4 Bent wire or glass rod Aspirator or vacuum pump Weighing dishes Table 9 Tex-110-E, Particle Size Analysis of Soils Part I Sieve Analysis of Material Retained on the 425 m (No. 40) Sieve Drying oven, maintained at 230 9F (110 5C) Balance, Class G2, minimum capacity of 33 lb. (15 kg) Verify temperature Tex-927-K Verify calibration record Tex-901-K Mechanical sieve shaker Verify sieving duration Procedure 3 Sample splitter, quartering machine, or quartering cloth Verify wire cloth for Pans Part II Hydrometer Analysis of Soils Passing 425 m (No. 40) Sieve Stirring apparatus (either a mechanical stirring device or an air dispersion device) Constant temperature water bath Verify temperature settings Procedure 2 4 Thermometer, 1 220F (0 104C), accurate to 1F (0.5C) Visual inspection Calibrate/verify temperature Tex-926-K Procedure 4 Verify wire cloth for CONSTRUCTION DIVISION 5 25 EFFECTIVE DATE: MARCH 2017

6 Sedimentation cylinder Evaporating dishes Timing device w/second hand Hydrometer, graduated in grams per liter, type 151 H or 152 H Verify accuracy Visual inspection Verify dimensions and accuracy Procedure 1 or Tex-924-K NA Beaker, 7.5 oz. (250 ml) Table 10 Tex-111-E, Determining Amount of Material in Soils Finer than the 75m (No. 200) Sieve Drying oven, maintained at 230 9F (110 5C) Verify temperature Tex-927-K Balance, Class G1 for specimens with a mass of 200 g or less, Class G2 for specimens with a mass greater than 200 g Verify calibration record Tex-901-K Verify wire cloth for Quartering machine, sample splitter, or quartering cloth Stirring device with dispersion cup or soil dispersion tube Sample containers Table 11 Tex-1-E, Admixing Lime to Reduce the Plasticity Index of Soils Apparatus as listed in Apparatus as listed in Tex-104-E Tex-104-E Tex-104-E Tex-104-E Apparatus as listed in Tex-105-E Tex-105-E Tex-105-E Tex-105-E CONSTRUCTION DIVISION 6 25 EFFECTIVE DATE: MARCH 2017

7 Table Tex-113-E, Laboratory Compaction Characteristics and Moisture-Density Relationship of Base Material and Cohesionless Sand Automatic tamper Compaction mold Height measuring device (metal stand, spacer blocks, digital or dial indicator) Balance, Class G2, minimum capacity of 35 lb. (16 kg) Drying oven, maintained at 230 9F (110 5C) Evaluate condition Determine compactive energy delivered Verify dimensions Verify volume Form 2460 Procedure 8 Procedure 10 Tex-905-K Verify height using spacer blocks NA Each use Verify calibration record Tex-901-K Verify temperature Tex-927-K Extra base plate Hydraulic extrusion press Verify wire cloth for Metal pans with lids Clean, circular porous stones Verify stones are not clogged or chipped and meet specified dimensions Procedure 11 Small hand tools Non-absorptive bowls with lids Sprinkling jar Non-porous paper discs, 6 in. diameter Visual inspection NA Each use Soil compactor analyzer (SCA), including sensor rod assembly, control box, and computer with system software Sensor verification and calibration SCA Reference Guide Slide Finishing Hammer Verify dimensions and weights Tex-113-E Level CONSTRUCTION DIVISION 7 25 EFFECTIVE DATE: MARCH 2017

8 Table 13 Tex-114-E, Laboratory Compaction Characteristics and Moisture-Density Relationship of Subgrade and Embankment Soils Evaluate condition Form 2460 Automatic tamper Determine dimensions Procedure 9 Compaction mold Height measuring device (metal stand, spacer blocks, digital or dial indicator) Balance, Class G2, minimum capacity of 35 lb. (16 kg) Drying oven, maintained at 230 9F (110 5C) Verify dimensions Verify volume Procedure 10 Tex-905-K Verify height using spacer blocks NA Each use Verify calibration record Tex-901-K Verify temperature Tex-927-K Verify wire cloth for Extra base plate Hydraulic extrusion press Metal pans with lids Clean, circular porous stones Verify stones Procedure 11 Sprinkling jar Small hand tools Level Straightedge or drawknife Check planeness and length ASTM D698 or D1557 Slide Finishing Hammer Verify dimensions and weights Tex-113-E Table 14 Tex-115-E, Field Method for Determining In-Place Density of Soils and Base Materials Nuclear testing gauge Part I Nuclear Gauge Method Verify calibration record As specified by manufacturer Calibration curves for nuclear gauge Scraper plate and drill rod guide Drill rod and driver or hammer Shovel, sieve, trowel or straightedge, and miscellaneous hand tools CONSTRUCTION DIVISION 8 25 EFFECTIVE DATE: MARCH 2017

9 Standardizing block Gauge log book Portable reference standard Part II Sand Cone Method Buckets with lids or plastic bags Drying pans Trowel, small hand tools Straightedge Check planeness and length ASTM D698 or D1557 Attachable jar, or other sand container Metal base plate or template Detachable appliance consisting of a cylindrical valve with an orifice approximately 0.5 in. (13 mm) in diameter Balance, Class G5, minimum capacity of 50 lb. (20 kg) Verify calibration record Tex-901-K Drying equipment Tex-103-E Tex-103-E Tex-103-E Calibrated sand cone and sand Verify calibration Tex-115-E Each Test Verify wire cloth for Table 15 Tex-116-E, Ball Mill Method for Determining the Disintegration of Flexible Base Material Oven, Air-dryer maintained at 1409F (605C) Verify temperature Tex-927-K Balance, Class G5, minimum capacity of 33 lb. (15kg) Verify calibration record Tex-901-K Verify wire cloth for Wet ball mill machine Check RPM, dimensions, and revolution counter Procedure Metal Spheres Verify weight and dimensions As specified in Tex-116-E Crusher (optional) CONSTRUCTION DIVISION 9 25 EFFECTIVE DATE: MARCH 2017

10 Misc. pans, wash bottles, etc. Container (for liquid), 0.5 gal. (2 L) Table 16 Tex-117-E, Triaxial Compression for Disturbed Soils and Base Materials Apparatus listed in Apparatus listed in Tex-113-E Apparatus listed in Tex-114-E Tex-113-E Tex-114-E Tex-113-E Tex-114-E Tex-113-E Tex-114-E Triaxial Cells Aspirator or other vacuum pump Air compressor Automated load frame or screw jack press Verify calibration Tex-902-K Pressure regulator, gauges, and valves Verify calibration Tex-902-K Axial load measuring device 10 K load cell (for use with automated load frame) Verify calibration Verify calibration Tex-902-K, Procedure 13 Tex-902-K, Procedure 13 Proving ring (for use with screw jack press) Verify calibration Tex-902-K Circumference measuring device Lead weights Curing pans Metal pans with lids Filter paper, medium flow porosity Visual inspection NA Each use Non-porosity paper discs, 6 in. diameter Visual inspection NA Each use Porous stones Loading end cap Verify stones are not clogged or chipped and meet specified dimensions Verify cap is not warped, top and bottom surfaces are level, and there is no pitting or damage to the surfaces Procedure 11 NA CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

11 Table 17 Tex-118-E, Triaxial Compression Test for Undisturbed Soils Balance, Class G1 for soil specimens less than 100 g, or Class G2 for specimens 100 g or heavier Verify calibration Tex-901-K Axial load device Verify calibration NA Axial load measuring device Verify calibration Tex-902-K, Procedure 13 Chamber pressure maintaining and measuring device Devices to measure the height and diameter of the specimen Verify calibration NA Verify calibration NA Triaxial compression chamber Impermeable rigid specimen cap and base Deformation indicator Rubber membrane Sample extruder Timing device, to measure to the nearest 1 sec. Verify accuracy Procedure 1 or Tex-924-K Sample containers Miscellaneous hand tools and equipment Apparatus listed in Table 18 Tex-0-E, Soil-Cement Testing Apparatus listed in Tex-113-E Tex-113-E Tex-113-E Tex-113-E Apparatus listed in Tex-117-E Tex-117-E Tex-117-E Tex-117-E High capacity compression testing device, 60,000 lb. (267 kn) Triaxial screw jack press or automated load frame [use for anticipated strengths of 400 psi (2758 kpa)] Verify calibration Tex-902-K Verify calibration Tex-902-K CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

12 Apparatus listed in Apparatus listed in Tex-113-E Apparatus listed in Tex-8-E Apparatus listed in Tex-117-E Table 19 Tex-1-E, Soil-Lime Testing High capacity compression testing device [60,000 lb. (267kN)] meeting the requirements of ASTM D1633 Triaxial screw jack press or automated load frame [use for anticipated strengths of 400 psi (2758 kpa)] Tex-113-E Tex-8-E Tex-117-E Tex-113-E Tex-8-E Tex-117-E Tex-113-E Tex-8-E Tex-117-E Verify calibration Tex-902-K Verify calibration Tex-902-K Apparatus listed in Table 20 Tex-3-E, Determining the Drainage Factor of Soil Materials Apparatus listed in Tex-113-E or Tex-114-E Apparatus listed in Tex-117-E Tex-113-E or Tex-114-E Tex-117-E Tex-113-E or Tex-114-E Tex-117-E Tex-113-E or Tex-114-E Tex-117-E Circular loading plate Upper and lower cylindrical loading heads Triaxial test cells Small proving ring Loading press assembly Water reservoir bottle Drilled loading plate CONSTRUCTION DIVISION 25 EFFECTIVE DATE: MARCH 2017

13 Apparatus listed in Table 21 Tex-4-E, Potential Vertical Rise of Natural Subgrade Soils Apparatus listed in Tex-103-E Tex-103-E Tex-103-E Tex-103-E Apparatus listed in Tex-104-E Tex-104-E Tex-104-E Tex-104-E Apparatus listed in Tex-105-E Tex-105-E Tex-105-E Tex-105-E Apparatus listed in Tex-106-E Tex-106-E Tex-106-E Tex-106-E Apparatus listed in Tex-207-F Tex-207-F Tex-207-F Tex-207-F Supply of paraffin, cutting knives, other small hand tools Sampling device, core drilling rig equipment to take disturbed or undisturbed core samples of the material in place Table 22 Tex-5-E, Determining Modulus of Subgrade Reaction (K Value) Loading device Hydraulic jack assembly with spherical bearing attachment Verify calibration NA Dial gauges Verify calibration, visual inspection NA Deflection beam Verify dimensions NA Miscellaneous hand tools Thermometer Verify temperature Tex-926-K Set of circular steel bearing plates Verify dimensions NA CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

14 Table 23 Tex-6-E, Molding, Testing, and Evaluating Bituminous Black Base Materials Apparatus listed in Motorized gyratory press Verify calibration Tex-916-K Compaction mold Verify dimensions NA Spacer block, 8 in. (200 mm) high Check dimensions NA Press Mechanical mixer Ovens, capable of maintaining 290 5F (143 3C), 250 5F (1 3C), 140 5F (60 3C) Verify temperature. Tex-927-K Electric hot plate Dolly, caster mounted Check dimensions NA Metal pans Circular porous stones, slightly less than 6 in. in diameter and 2 in. high Verify stones are not clogged or chipped and meet specified dimensions Procedure 11 Metal disks Check dimensions NA Filter paper, 6 in. in diameter Small tools, trowels, plastic mallet Fine soil pans, round pans and sample pans Verification of wire cloth for Screw jack press Verify calibration Tex-902-K CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

15 Table 24 Tex-7-E, Lime-Fly Ash Compressive Strength Test Methods Apparatus as listed in Apparatus as listed in Tex-113-E or Tex-114-E Tex-113-E or Tex-114-E Apparatus as listed in Tex-117-E Tex-117-E Tex-117-E Tex-117-E High capacity compression testing device [60,000 lb. (267kN)], meeting the requirements of ASTM D1633 Triaxial screw jack press or automated load frame, [use for anticipated strengths of 400psi (2757 kpa) ] Verify calibration Tex-902-K Verify calibration Tex-902-K Table 25 Tex-8-E, Determining Soil ph ph meter with glass electrode, range Check fluid level Refer to manufacturer s instructions Each use Buffer solutions, such as ph 4.0, 7.0, and 9.0 Check standard against machine NA Each use Apparatus listed in Drying oven, maintained at 140F (60C) Verify temperature Tex-927-K Balance, Class G1 Verify calibration Tex-901-K Glass stirring rod and magnetic stir bar Glass beaker, 250 ml Stirring device, mechanical or magnetic Thermometer, 32 2F (0 100C) Verify temperature Tex-926-K CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

16 Table 26 Tex-9-E, Measuring the Resistivity of Soils Materials Drying oven, maintained at 140 9F (60 5C) Verify temperature Tex-927-K Splitter or quartering cloth Portable resistivity meter, Vibroground Model 293 or equal Verify calibration NA Resistivity box Verify dimensions NA Straightedge Balance, Class G2, minimum capacity of 1500g Check planeness and length ASTM D698 or D1557 Verify calibration record Tex-901-K Verify wire cloth for Graduated beaker, 200 ml Visually inspect NA Drying pans, mixing pans, trowel, and small scoop Visually inspect NA Table 27 Tex-131-E, Consolidated Undrained Triaxial Compression Test for Undisturbed Soils Balance, Class G2, minimum capacity of 4000 g Verify calibration Tex-901-K Axial load device Verify calibration NA Axial load measuring device Chamber pressure maintaining and measuring device Devices to measure the height and diameter of the specimen Verify calibration Tex-902-K, Procedure 13 Verify calibration NA Verify calibration NA Pore pressure measuring device Verify calibration NA Triaxial compression chamber Impermeable rigid specimen cap and base Drying oven, thermostatically controlled, capable of maintaining a temperature of 230 9F (110 5C) Verify temperature Tex-927-K Deformation indicator Rubber membrane CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

17 Sample extruder Sample containers Miscellaneous hand tool and equipment Filter paper Vacuum membrane expander Sample cutter Porous stones Verify stones are not clogged or chipped, verify specified dimensions Procedure 11 Sample trimming equipment Hammer Table 28 Tex-132-E, Texas Cone Penetration Visual inspection, verify weight and drop height NA Drill stem, sufficient to accomplish drilling to the desired depth Anvil, threaded to fit the drill stem, slotted to accept the hammer Conical driving point Visual inspection, verify dimensions NA Table 29 Tex-135-E, Freezing and Thawing Tests of Compacted Soil-Cement Mixture Apparatus listed in Tex-113-E Tex-113-E Tex-113-E Tex-113-E Freezing cabinet Verify temperature Procedure 14 Moist room Verify temperature Procedure 14 Wire scratch brush Scarifier Carriers or trays Mechanical mixing device Flat pan, 2" deep Pads (1/4" thick), felt, blotters, sheets of plastic, or similar material CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

18 Table 30 Tex-140-E, Measuring Thickness of Pavement Layer Drill with auger bit, grubbing hoe, or other acceptable digging tool Nail, blade, knife, or other suitable tool, not to exceed 1/8" in thickness, and about 3" long Folding ruler (6 ft.), or other scale with 1/8" or smaller divisions Depth measurement indicator, DHT#2238 (not to be used for pay purposes) Table 31 Tex-141-E, Manual Procedure for Description and Identification of Soils Pocket knife or small spatula Hydrochloric acid, one part HCl (10N) to three parts water Visual inspection NA Each use Table 32 Tex-142-E, Laboratory Classification of Soils for Engineering Purposes Apparatus listed in Apparatus listed in Tex-104-E Tex-104-E Tex-104-E Tex-104-E Apparatus listed in Tex-105-E Tex-105-E Tex-105-E Tex-105-E Apparatus listed in Tex-106-E Tex-106-E Tex-106-E Tex-106-E Apparatus listed in Tex-110-E Tex-110-E Tex-110-E Tex-110-E CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

19 Table 33 Tex-145-E, Determining Sulfate Content in Soils Colorimetric Method Colorimeter and accessories Visual inspection NA Each use Auger sampler Core sampler Balance, Class G2, minimum capacity of 3500 g Verify calibration Tex-901-K Verification of wire cloth for Mortar and pestle Crusher Drying oven, maintained at 140 9F (60 5C) Miscellaneous glassware described in test procedure Verify temperature Tex-927-K HDPE bottles, 8 oz. and 16 oz. Funnel Filter paper, fine porosity Disposable pipettes Wash bottle Desiccator, optional (not necessary if containers with close-fitting lids are used) Visual inspection NA Sample splitter Miscellaneous hand tools Table 34 Tex-146-E, Conductivity Test for Field Detection of Sulfates in Soil Portable conductivity meter Verify electrode calibration As described in Tex-145-E Each use Conductivity standard solutions Check expiration date NA Each use HDPE bottle and wash bottle Verify wire cloth for Mortar and pestle Portable scale, Class G2, minimum Verify calibration Tex-901-K CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

20 capacity of 400 g Stopwatch Verify accuracy Procedure 1 or Tex-924-K Graduated cylinder Wash bottle Weighing dishes, small spatula, and brush. Hand auger Table 35 Tex-148-E, Soil Organic Content Using UV-Vis Method UV-Vis spectrometer, capable of measuring at a wavelength of 300 nm Balance, Class G1, minimum capacity of 200 g Clean light source lenses according to manufacturer s instructions NA Each use Verify calibration record Tex-901-K Verify wire cloth for Mortar and pestle Crusher Cuvettes (glass or quartz), 1 cm UV-Vis Visual inspection, do not use scratched or fractured cuvettes NA Each use Graduated cylinder, 10 ml Visually inspect NA Wash bottles for DI water and solutions Glass or polyethylene bottles, minimum capacity, 1 L Sample splitter Stopwatch Verify accuracy Procedure 1 or Tex-924-K 4. PROCEDURES 4.1 Procedure 1 Timers: Hold a calibrated timer in one hand and the timer to be checked in the opposite hand Start the timers simultaneously by pressing the start buttons at the same time Allow the timers to run at least 15 min., then stop the timers simultaneously. Record the time indicated by both timers. Repeat this step for a 30-min. run. CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

21 4.1.4 Record the difference between the two timers. Calculate and record the percent accuracy. ( A B) % accuracy x100 B Where: A = Reading on lab timer (sec.) B = Reading on standard timer (sec.) Note 1 If no accuracy is specified in the test procedure, choose a maximum allowable error of 1 sec. per minute. 4.2 Procedure 2 Water Bath: Place a calibrated thermometer in the center of the water bath for 1 hour to verify temperature setting. Note 2 Check setting at which the water bath is used. 4.3 Procedure 3 Mechanical Sieve Shaker: Match the sieve and aggregate such that a minimum of 10% of the total sample weight is retained on each sieve. After sieving on the mechanical shaker for a given time, check the thoroughness of sieving by hand shaking each sieve with a lateral and vertical motion, accompanied by a jarring action, to keep the material moving continuously over the surface of the sieve. If hand shaking shows more than 1% passing any given sieve, increase the shaking time and repeat the check until all screens show less than 1% by weight passing a given sieve. 4.4 Procedure 4 Thermometers: Examine documentation for each thermometer used. Examine documentation for the standard used The documentation on thermometers used should include: temperature read at each calibration point, true temperature read at each calibration point, serial or identification number of each thermometer, date calibrated or checked, and signature of the person who read calibration The documentation on standard used should include: serial or identification number of standard used, dated standard used, and signature of the person who ran calibration on standard. CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

22 4.5 Procedure 5 Grooving Tool: Verify that the grooving tool meets all of the dimensions outlined in Tex-104-E. Check the measurements using a calibrated caliper that will measure to the nearest 0.01 mm and a measuring magnifier. 4.6 Procedure 6 Liquid Limit Testing Device: Verify that all of the dimensions outlined in Tex-104-E are within acceptable limits using a calibrated caliper and small ruler. A straightedge is necessary to complete some of the measurements Verify that the cam is smooth and free of any deformations that would cause jarring of the sample other than the calibrated drop at the end of the rotation Measure the contact point between the cup and the base of the liquid limit device. This wear spot should measure no more than 0.5 in. (.7 mm) in diameter. Take this measurement at the widest point Calibrate the height of the drop of the cup as described in Tex-104-E. 4.7 Procedure 7 Bar Linear Shrinkage Mold: The shrinkage mold should match the dimensions outlined in Tex-107-E. The dimensions listed are internal dimensions. 4.8 Procedure 8 Automatic Tamper for Base Compaction: Evaluate condition and dimensions of automatic tamper and record on Form 2460, Soil Compactor Adjustment & Soil Compactor Analyzer Report Form. Make adjustments necessary to comply with automatic tamper tolerances and maintenance requirements Mount the soil compactor analyzer (SCA) to the automatic tamper in accordance with the Soil Compactor Analyzer Reference Guide Prepare and compact a minimum of one specimen in accordance with Tex-113-E using the SCA. The SCA will turn the compactor off when the correct energy has been delivered to the lift. The total energy delivered to each lift must equal 750 ± 15.0 ft.-lb. The number of blows needed to achieve the 750 ft.-lb. must be a minimum of 50 and a maximum of 60. If the number of blows is outside the range, adjust the compactor so that the specified energy in achieved within the allowable number of blows. Some causes for not meeting the minimum compactive energy requirement include loss of compactive effort due to improper base mounting, incorrect drop height, hammer weight, a sticking grabber, incorrect tolerances, worn bushings, worn guide rods, worn or dirty hammer rod, or worn guide disc If the first specimen does not meet the tolerances in Section 4.8.3, make adjustments to the compactor. Prepare and compact another sample using the SCA to verify the tolerances in Section are met. Continue to make adjustments to the compactor, CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

23 preparing and compacting samples with the SCA until the tolerances in Section are met. 4.9 Procedure 9 Automatic Tamper for Soil Compaction: Evaluate condition and dimensions of automatic tamper and record on Form Make adjustments necessary to comply with tolerances and maintenance requirements specified in the compactor manual. Verify the following: the base is securely mounted to a rigid foundation such as a concrete block with a mass of not less than 200 lb.; rammers are within ±0.02 lb. of the weight specified in Tex-113-E and Tex-114-E; striking face of the rammers conform to a 43 ± 2 segment of a 2.9 ± 0.1 in. (74 ± 2.5 mm) radius circle; hammer drop height is in. or 18 in. when set in accordance with the compactor manual; grabber does operate freely; bushings, guide rods, and guide disc tolerances conform to the requirements specified in the compactor manual; and guide rod is clean Procedure 10 Molds Note 3 Also refer to Tex-905-K, Part II Measure the inside diameter of the mold at four locations near the bottom, four locations near the middle, and four locations near the top, using a micrometer caliper and micrometer dial and record each reading as d1, d2, d3, etc Calculate the average inside diameter, d avg, in. (mm): d avg = (d1+d2+d3+d4+d5+d6+d7+d8+d9+d10+d11+d),in.(mm) The inside diameter of the mold must meet the following tolerances: 6 in., +1/16, or -1/64 in Calculate the cross sectional area of the mold: 2 ) A x = ( d avg, in. 2 (mm 2 ) 4 CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

24 Calculate the volume, in ft. 3 (m 3 ) for 0.04 in. (1 mm) of height of the mold: Volume per in.= A x 1728, ft3 in. Volume per mm= A x 10 9, m3 mm Measure the height of the mold at its four quarter points and calculate the average height. The height must be 8.5 1/16 in Procedure 11 Porous Stones: Wash porous stones with a plastic bristle brush after each use and dry the stones in an oven at 140 F Clean porous stones monthly in an ultrasonic cleaner, vibrating parts cleaner, or equivalent to remove particles from the pores so that water can move freely through the stones. Verify that the stones are not clogged by placing them in a pan containing 1/2 in. of water and measure the time required for water to travel through the stone to its top surface. If this takes longer than 10 minutes, clean the stones until water is able to reach the surface in a maximum of 10 minutes. If this is not achievable, discard the stone Measure dimensions with calibrated calipers. Discard stone if the diameter is less than 5-3/4 in. (146.0 mm) or the height exceeds a tolerance of 2 in. 1/4 in. ( mm). 4. Procedure Wet Ball Mill: 4..1 Verify that all of the dimensions are within tolerances listed for the wet ball mill machine as outlined in Tex-116-E. Check the mill for leaks when sealed Verify that the RPM of the mill is Inspect the apparatus for a revolution counter that will turn off the motor after the completion of 600 revolutions Verify that the size and weight of the metal spheres are within tolerances listed in Tex-116-E Procedure K Load Cell: Calibrate the load cell in 100-lb. increments beginning at a load of 200 lb. Continue this frequency through a load of 1,000 lb Calibrate the load cell at the frequency specified in Tex-902-K for loads above 1,000 lb Procedure 14 Temperature Dependent Apparatus Freeze-Thaw Chamber, Refrigerators, etc Using a calibrated digital thermometer graduated in 2 F (1 C), place the thermocouple probe on the shelf where the samples are normally placed Take the first reading at least 1 hour after closing the apparatus. (Apparatus should remain undisturbed.) Take as many readings as necessary to determine if the temperature CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

25 range is within the specified tolerance. (Three consecutive readings, taken no less than 2 hours apart and within the tolerance allowed, are required) Adjust the temperature of the apparatus if an observed temperature reading is outside the specified tolerance, allowing at least 2 hours for the temperature to stabilize between each adjustment Repeat taking readings and adjusting the temperature as necessary. 5. ARCHIVED VERSIONS 5.1 Archived versions are available. CONSTRUCTION DIVISION EFFECTIVE DATE: MARCH 2017

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