DMS-6340, Vehicle Loop Wire Sealant

Transcription

1 Overview Effective Date: April 2000 July This Specification shall govern for the Quality Monitoring Program (QMP) for Vehicle Loop Wire Sealants. This Specification describes procedures that will identify prequalification requests, prequalification procedures, quality control requirements, disqualification, sampling, requalification, and material requirements. Three types of sealants are described. Types of Sealants Type I This sealant shall be a one-part moisture cured material with the ability to encapsulate and seal the vehicle loop wire. Two classes are described. Type II Class A This sealant shall be supplied in a pre-packaged configuration, to be dispensed by a manual applicator or caulking gun. Class B This sealant shall be supplied in bulk form, either in one-gallon containers or five-gallon containers. Application of this material may be accomplished by manual or mechanical means, as recommended by the manufacturer. This sealant shall be a two-part formulation that is intended for use when a quickcuring, high-strength material is desired. Two classes are described. Class A This sealant shall be a pre-packaged dual cartridge configuration. Ratios and sizes of the cartridges shall be as recommended by the manufacturer. Class B This sealant shall be in bulk form in either one-gallon or five-gallon containers. The mixing ratio of part A to part B shall be one-to-one by volume. Application of this material may be accomplished by manual or mechanical means, as recommended by the manufacturer. Departmental Material Specifications 1 4/00 7/04

2 This sealant shall be a hot-melt material where a heating apparatus is required to liquefy and dispense the material. Application of this material may be accomplished by manual or mechanical means, as recommended by the manufacturer. Quality Monitoring Approved Materials List The Materials & Pavements Section of the Construction Division (CST/M&P) shall maintain an approved list of all materials conforming to the procedures and requirements of this program. This list will be updated on a yearly basis, to expire on the last day of December. Prospective qualifiers may submit their material at any time during the year, but approval will expire at the end of the calendar year. Prospective qualifiers should submit their material no later than the last day of November to be considered for approval for the entire following year. CST/M&P reserves the right to randomly sample from the manufacturing plant, warehouse, or job site, at any time during the approved period. Prequalification requests shall be submitted to the Department of Transportation, Construction Division/Materials & Pavements Section (CP51), 125 East 11 th Street, Austin, Texas Payment Procurement by the State Payment for all materials under this Specification shall be in accordance with the conditions prescribed in the contract awarded by the state. Contracts All materials under this Specification utilized by the contractor shall be paid in accordance with Item 688, Traffic Signal Detectors, or Special Specification 6505, Surveillance System Loop Detectors. Performance History Establishment of Performance History Departmental Material Specifications 2 4/00 7/04

3 Prospective bidders and/or suppliers may be required to install their material at a test location. Materials and installation will be provided by the manufacturer, supplier, or their representative. The Department reserves the right to perform any or all tests required by this Specification to verify tests reported by the manufacturer. In the case of variance, the Department test will govern. All materials for approval shall be submitted at no cost to The Department. Performance History Some tests required by this Specification extend over a prolonged period. Therefore, testing for acceptance of materials supplied on any contract or state purchase order will only be considered on those materials which determined by the Director of CST/M&P to be identifiable as a material having an established performance history of compliance with criteria established by this Specification. Requalification When, in the opinion of the Director of CST/M&P, changes have been made in the composition and/or manufacturing process of a prequalified material, a re-evaluation of the performance may be required. The Department may conduct additional tests to identify changes in the material. Changes that are detected in the composition and/or manufacturing process, which have not been reported by the manufacturer, may be cause for removal of that material from the list of prequalified materials. If a material is removed from the prequalified list of materials, the manufacturer may re-submit their product for requalification consideration, only after submitting a test report from an independent laboratory with test data that certifies that the material meets the requirements of this program. Sampling and Testing Sampling shall be as determined by CST/M&P. Testing shall be in accordance with the methods listed in Material Requirements. Costs of testing and sampling are normally borne by the Department. However, the costs of sampling and testing materials failing to conform to the requirements of this Specification shall be borne by the contractor or supplier. Departmental Material Specifications 3 4/00 7/04

4 Costs of sampling and testing failing material shall be assessed at the rate established by the Director or CST/M&P and in effect at the time of testing. Amounts due the Department for conducting such tests shall be deducted from monthly or final estimates on contracts, from partial or final payments on direct purchases by the state, or directly billed to the supplier. Material Requirements General Requirements Sealants may be a one- or two-component material and shall be suitable for use in both asphaltic and concrete pavement. Sealants shall not shrink, swell, or crack during or after its curing process. Application equipment, techniques, and temperature range shall be in accordance with the manufacturer s recommendations. Material temperature shall not exceed 177ºC (350 F) in its pre-heated or chemically reactive state. The sealant, upon application, shall be of sufficient free-flowing consistency to thoroughly fill the road cavity. Physical Properties Sealants shall have a minimum shelf life of twelve (12) months. Sealants shall have physical characteristics as classified and outlined by the following requirements. Type I, Class A and B Type I, Class A and B Property Requirements Standard Bond Strength (Hardened concrete to hardened concrete) Curing Time Elongation Tensile strength 345 kpa (50 psi) minimum 24 hour tack-free time, maximum complete 50% minimum 690 kpa (100 psi) minimum Test Method "Tex-614-J, Testing ASTM mm (40 mil) thickness at 25ºC Departmental Material Specifications 4 4/00 7/04

5 Note: To prevent tracking, it is recommended to broadcast sand over a Type I sealant immediately after application and before opening sealed slot to traffic. Type II, Class A Type II, Class A Gel Time 3 minutes minimum Test Method "Tex-614-J, Testing Bond Strength (Hardened concrete to hardened concrete) Elongation Curing Time 1379 kpa (200 psi) minimum 10% minimum 45 minute maximum tack-free time. Type II, Class B Test Method "Tex-614-J, Testing ASTM mm (40 mil) thickness at 25ºC Type II, Class B Gel Time 10 minutes minimum Test Method "Tex-614-J, Testing Bond Strength (Hardened concrete to hardened concrete) Elongation 1379 kpa (200 psi) minimum 10% minimum Test Method "Tex-614-J, Testing Curing Time 45 minute maximum tack-free time. ASTM mm (40 mil) thickness at 25ºC Curing Time Bond Strength (Hardened concrete to hardened concrete) 45 minutes maximum tackfree time ASTM mm (40 mil) thickness at 25ºC 345 kpa (50 psi) minimum Test Method "Tex-614-J, Testing Epoxy Materials Ductility 10 cm, minimum ASTM D 113 Departmental Material Specifications 5 4/00 7/04

6 , at 5 cm per minute Resistance The cured sealants shall be resistant to the following chemicals: Chemical Resistance Chemical Effect Standard Deicers No effect ASTM D 471 after 22 hours Motor oil No effect ASTM D 471 after 22 hours Sodium Chloride Solution (5%) No effect ASTM D 471 after 22 hours Hydraulic Brake Fluid No effect ASTM D 471 after 22 hours Certification The contractor shall provide written certification from the manufacturer stating that the material supplied meets the requirements of this Specification. The Department reserves the right to perform any or all of the tests described in this Specification to ensure compliance. Failure of a sample will require that the loops be removed and replaced with the new sealant meeting this Specification. Departmental Material Specifications 6 4/00 7/04