ESBD_383227_1732308023095_02. Specification.pdf

1-5

TEXAS DEPARTMENT OF TRANSPORTATION

SPECIFICATION NO.

TxDOT 845-63-42465

DATED: NOVEMBER 2024

SUPERPAVE GYRATORY COMPACTOR

PUBLICATION

This specification is a product of the Texas Department of Transportation (TxDOT). This specification may not be sold for profit or monetary gain. If this document is altered in any way, the header and any and all references to TxDOT must be removed. TxDOT does not assume nor accept any liability when this specification is used in the procurement process by any other entity.

1. SCOPE: This specification describes a laboratory gyratory compactor. This equipment creates a cylindrical specimen from loose hot mix asphalt (HMA) through a vertical consolidation pressure and gyratory (kneading) effort. The gyratory compaction method best simulates long term effects of traffic on pavement.

2. DEFINITIONS OF TERMS AND ACRONYMS

2.1. ANSI – American National Standards Institute

2.2. Contract – Any Purchase Order (PO) or Blanket Purchase Order (BPO) resulting from this solicitation as listed in the Order of Precedence in the resulting PO or BPO.

2.3. HMA – Hot Mix Asphalt

2.4. TxDOT – Texas Department of Transportation

2.5. ID - Inside Dimension

3. GENERAL CLAUSES AND CONDITIONS:

3.1. The equipment furnished under this specification must be the latest improved model in current production, as offered to commercial trade, and shall be of quality workmanship and material. The respondent represents that all equipment offered under this specification shall be new. USED, SHOPWORN, DEMONSTRATOR, PROTOTYPE, REMANUFACTURED, RECONDITIONED, OR DISCONTINUED MODELS ARE NOT

ACCEPTABLE.

3.2. Respondent should submit with the solicitation the latest printed literature and detailed specifications on equipment the respondent proposes to furnish. This literature is for informational purposes only.

3.3. The unit must be completely assembled and adjusted, and all equipment including standard and supplemental equipment must be installed and the unit made ready for continuous operation upon delivery.

3.4. All parts not specifically mentioned which are necessary for the unit to be complete and ready for operation or which are normally furnished as standard equipment must be furnished by the vendor. All parts shall conform in strength, quality and workmanship to the accepted standards of the industry.

SPECIFICATION NO.

DATED: November 2024

2-5

3.5. The unit provided must meet or exceed all federal and State of Texas safety, health, lighting and noise regulations and standards in effect and applicable to equipment furnished at the time of manufacture.

3.6. It is the intent of TxDOT to purchase goods, equipment and services having the least adverse environmental impact, within the constraints of statutory purchasing requirements, TxDOT need, availability, and sound economic considerations. Suggested changes and environmental enhancements for possible inclusion in future revisions of this specification are encouraged.

4. FUNCTIONAL AND DESIGN REQUIREMENTS: This specification describes a laboratory gyratory compactor. This equipment creates a cylindrical specimen from loose hot mix asphalt (HMA) through a vertical consolidation pressure and gyratory (kneading) effort. The gyratory compaction method best simulates long term effects of traffic on pavement.

4.1. NOTICE TO RESPONDENT: Any example shown is listed to show type and class of equipment desired. Respondent is cautioned to read the specifications carefully, as there may be special requirements not commonly offered by the equipment manufacturer. DO

NOT ASSUME STANDARD EQUIPMENT MEETS ALL OF THE DETAILED

SPECIFICATION REQUIREMENTS MERELY BECAUSE IT IS LISTED AS AN EXAMPLE.

Respondent is cautioned that any unit delivered to the FOB points that does not meet specifications in every aspect will not be accepted.

EXAMPLE: Pine Superpave Gyratory Compactor Model No. AFG2A G2

5. COMPACTION CHAMBER: M u s t be completely enclosed with sufficient work area for the mold to be charged, placed into the compaction chamber, and extruded without being lifted.

5.1. Compaction chamber must have a window for viewing through the door.

5.2. Compaction chamber must have an emergency stop switch.

5.3. Compaction chamber must have a self-aligning ram and mold carriage assembly.

5.4. The axis of the ram is perpendicular to the platen of the compactor.

5.5. The compactor tilts the specimen molds at an internal angle of 1.16 ± 0.02° (20.2 ± 0.35 mrad) and gyrates specimen molds at a rate of 30.0 ± 0.5 gyrations per minute throughout compaction.

5.6. The compactor is designed to permit the specimen mold to revolve freely on its tilted axis during gyration.

5.7. The ram applies and maintains a constant pressure perpendicular to the cylindrical axis of the specimen during compaction. Consolidation pressure tolerances are 600 ± 60 kPa (87 ± 8.7 psi) for gyrations zero to five and 600 ± 18 kPa (87 ± 2.6 psi) for gyrations six and greater.

5.8. The speed of gyration shall be 30 ± 0.5 gyrations per minute and held constant during gyration of the specimen.

5.9. The compactor must compact a specimen from a minimum of one to 999 gyrations, set by the operator, with automatic shutoff after reaching the specified number of gyrations.

5.10. Consolidation pressure must be applied by means of a mechanical screw or hydraulic ram.

3-5

6. GYRATORY MOLD ASSEMBLIES AND RAM HEADS: Three mold assemblies, 150 mm inside dimension (ID), must be provided with each gyratory compactor. All tolerance measurements shall be determined at room temperature 20 degrees C to 22 degrees C. Mold assemblies shall be as follows.

6.1. Specimen molds must have steel walls that are at least 7.5 mm (0.3 in.) thick and have a minimum Rockwell hardness of C48.

6.2. Molds must have an inside diameter of 149.90-150.00 mm (5.901-5.912 in.) and be at least 250 mm (10 in.) high. Molds shall withstand constant reheating up to 175 °C (347 °F) without pitting and scarring.

6.3. The inside finish of the molds must have a root mean square (RMS) of 1.60 µm or smoother.

6.4. Simple specimen extrusion method/tool for the gyratory mold must be supplied.

6.5. Ram heads and mold bottoms must be fabricated from steel with a minimum Rockwell hardness of C48.

6.6. The ram heads must be perpendicular to its axis.

6.7. The platen side of each mold bottom must be flat and parallel to its face.

6.8. All ram and base plate faces (the sides presented to the specimen) must be ground flat to meet the smoothness requirements of ANSI B 46.1 and must have a diameter of 149.50-

149.75 mm (5.885-5.896 in.).

7. RECORDING AND DATA OUTPUT: Specimen height per gyration must be measured, recorded, and displayed one time per gyration, change in specimen height shall be within ± 0.1 mm.

Measurement of specimen height shall be based on rotations of the mechanical screw or per gyration basis.

7.1. Operator shall set the number of gyrations applied to the specimen. The data from a minimum of 20 previous specimens shall be stored.

7.2. When monitoring specimen density during compaction, provide a means to continuously measure and record the height of the specimen to the nearest 0.1 mm (0.0039 in.) during compaction, once per gyration.

7.3. Gyratory compactor must be equipped with an RJ45 Ethernet port for data output and 2 USB data ports for downloading data.

7.4. Gyratory compactor must operate on standard 110/115 VAC, 12 AMP, 50/60 Hz, 1 phase, power.

7.5. Weight must be a minimum of 880 pounds (400 kg).

7.6. CALIBRATION: Each Gyratory compactor must be provided with all the calibration tools necessary to measure or verify the consolidation pressure, height, and external gyratory angle.

8. ADDITIONAL SPECIFICATIONS: Gyratory Compactor must

8.1. Be equipped with built-in extruder

8.2. Capable of multi-point force and height calibration with a minimum of 10 points for force and 10 points for height

4-5

8.3. Gyration number, specimen height (mm), angle of gyration (degrees) consolidation pressure (Kpa) data acquisition.

8.4. Compact to number of gyrations, specified height or locking point

8.5. Compact at a specified internal or external angle

8.6. Manual mold locked down

8.7. Maximum 5,000 lb. load ring with certification

8.8. Include height block with certification

8.9. Be an electromechanical system

8.10. Approximate equipment dimensions:

Maximum Width 875 mm or 34.5 inches Maximum Depth 900 mm or 35.5 inches Maximum Height 1375 mm or 54 inches

8.11. ACCESSORIES: The following items must be supplied with each gyratory compactor:

8.11.1. 150 mm paper disc

8.11.2. Funnel for 150 mm mold

8.11.3. 150 mm specimen lift handle

8.11.4. Manufacturer’s recommended lubricant (one each container)

8.13. Compliance with AASHTO T312 Standard

8.14. Compliance with ASTM D6925 Standard

9. SAFETY PLAQUES OR DECALS: Product safety plaques or decals must be furnished and affixed at the operator's station and at any hazardous area. The safety plaques or decals must describe the nature of the hazard, level of hazard seriousness, how to avoid the hazard, and the consequence of human interaction with the hazard. Permanent plaques are preferred to decals.

Type, size, and location of product safety plaques or decals must be in accordance with current ANSI Z535.4 standard.

10. MANUAL(S): Equipment must be delivered with current original manual(s) and 2 copies containing illustrated parts list, operating, calibration, and service instructions in English. The manual(s) must be as detailed as possible outlining all necessary service and operating instructions for the equipment delivered. Manual(s) must include necessary warnings and safety precautions. It is requested, but not required, that the manual be printed on recycled paper. Copies must be reproduced from the current original manual and be clean and legible. All manuals must be written in English. In addition to the hard copy manual and copies, vendor shall provide an electronic media version of the current original manual.

11. DELIVERY REQUIREMENTS: Delivery of all equipment on this order must be completed within the number of days specified on the purchase order. Any unit(s) not delivered within this time frame may be canceled from the purchase order or, at TxDOT’s option, an extension may be granted in writing, whichever is in TxDOT’s best interest. If any unit is canceled for non-delivery, the needed equipment may be purchased elsewhere, and the vendor may be charged any additional increase in cost and handling.

12. ACCEPTANCE INSPECTION: All equipment ordered with this request will be subject to acceptance inspection and performance testing upon receipt. Acceptance inspection and

5-5 performance testing will not take more than five working days, weather permitting. Acceptance inspection will not occur until after the equipment has been delivered and installation and training is completed. The vendor will be notified within this time frame of any units not delivered in full compliance with the purchase order specifications. If any units are canceled for non-acceptance, the needed equipment may be purchased elsewhere and the vendor may be charged full increase, if any, in cost and handling.

13. WORKING DAY: A working day is defined as a calendar day, not including Saturdays, Sundays, or regularly observed state and federal holidays.

14. TRAINING: Manufacturer shall provide a demonstration on how to use the equipment. The vendor shall provide the training services of a competent factory trained technician thoroughly trained in the use and operation of the unit. The training shall be a minimum of two hours on safety, operation, and preventative maintenance of the unit.

15. VERIFICATION: After delivery and installation of the equipment, the manufacturer shall verify the equipment is in calibration. The vendor shall provide training and verification after the unit has been delivered and is ready for operation, but prior to acceptance and payment. These services shall take place on TxDOT’s premises at a time and date mutually agreed upon by the vendor and TxDOT.

16. WARRANTY REQUIREMENTS: The unit shall be warranted against all defects in material and workmanship for a period of not less than 12 months or 1,200 hours of use, whichever comes first, and shall cover 100% parts and labor for the unit. If the manufacturer's standard warranty period exceeds 12 months or 1,200 hours, then the standard warranty period shall be in effect. The warranty begins on the date the unit is determined to meet specifications and accepted into TxDOT’s fleet.

17. PARTS AND SERVICE: The manufacturer of the equipment furnished shall have an authorized dealer within the state of Texas. The authorized dealer shall have factory-trained personnel available for warranty repairs and the performance of service. The dealer shall also maintain an inventory of high-usage parts and a quick source for low-usage parts.