Category:1057 Material for Joints

This guidance establishes procedures for inspecting, sampling, testing and reporting materials for joints.

1057.1 Apparatus

(a) Rule with suitable graduations to accurately measure the material to be inspected.

(b) Micrometer or vernier caliper capable of measuring to 0.0001 in. (0.00254 mm) and accurate to within at least 0.001 in. (0.0254 mm).

(c) Balance or scale accurate to within 0.5 percent of the weight (mass) of the sample to be weighed.

1057.2 Procedure

1057.2.1 Pre-Acceptance Lists

Manufacturers and Brand Names (as applicable) of dowel bars, tie bars, hot pour elastic joint sealer, performed fiber expansion joint filler, plastic waterstop, rubber waterstop, copper sheeting for flashing, preformed sponge rubber expansion joint filler, plastic joint compound for pipe, and silicone sealant for joints will be placed on the Pre-Acceptance Lists on the MoDOT website maintained by the Central Office in accordance with Specification Sec 106.

1057.2.2 Manufacturer and Brand Name Approval

If a manufacturer desires to have material added to the Pre-Acceptance List of material for joints, a certification and guarantee must be submitted to Central Office Construction and Materials in accordance with the requirements of Specification Sec 1057. The certification and guarantee shall be accompanied by a sample of the material, if required by the specification, for laboratory testing. Upon approval of the material, it will be placed on the applicable list.

1057.2.3 Basis of Acceptance

Material is accepted by the PAL criteria as indicated in Approved and Pre-Qualified Lists. Central Office Construction and Materials will retain the original certification and guarantee. Additional certification is not necessary if the manufacturer and brand of material is clearly identified on the packaging or the documentation included with the shipment.

1057.2.4 Sampling

Each producer or supplier will be assigned to a district office for Facility Review, Sampling and Testing in accordance with Approved and Pre-Qualified Lists. During the visit, samples of material available at the facility should be obtained. Materials selected for sampling will typically be those that have been used in MoDOT work during the past month. Material originating at locations too far from the assigned district’s office is subject to sampling at an intermediate location or at the jobsite. It is the assigned district’s responsibility to coordinate with the supplier and other districts to assure the proper materials are sampled.

1057.2.4.1 Dowel Bars

Dowel bars for use in dowel supporting units shall be inspected in accordance with Reinforcing Steel for Concrete. In addition, the inspector shall insure that the bars are smooth, round, and free of cutting burrs and other projections.

1057.2.4.1.1 Dowel Supporting Units. Dowel supporting units shall be inspected to insure that approved bars are used to fabricate a unit meeting the requirements of Standard Drawing 502.10.

1057.2.4.1.2 Graphite Grease. The free end of the dowel bar is given a coating of approved graphite grease. Graphite grease shall be applied in a manner that will result in a thorough covering of that section of the bar with a thin uniform coating. Graphite grease shall be accepted on the basis of manufacturer's certification or label analysis showing specification compliance. In many cases, this is performed in the field by the Resident Engineer. No testing or reporting is required. If the graphite grease containers do not show the necessary information and if certification cannot be obtained, samples are to be submitted to the Central Laboratory.

1057.2.4.1.3 Bondbreaker. An approved bondbreaker solution may be used to coat completed dowel bar basket units as an alternative to coating dowel bars with graphite grease. The units shall be pre-dipped and the bondbreaker should not be sprayed or field applied. The bondbreaker should be uniformly applied without excessive drips or thickness. Excessive dripping or thickness shall be cause for rejection. The bondbreaker shall be applied following manufacturer recommendations. Certification for the bondbreaker, showing the product name, manufacturer, and date of coating application, shall be provided by the dowel basket supplier.

1057.2.4.2 Tie Bars

Tie bars shall be round deformed steel reinforcing bars inspected in accordance with Reinforcing Steel for Concrete except that tie bars which are to be bent and straightened shall be Grade 40 (300) in accordance with AASHTO M 31.

1057.2.4.3 Concrete Joint Sealer, Hot Poured Elastic Type

A sample shall consist of the bulk container or one of the packaged parts of the bulk container (in the original manufacturer's container). A sample can also consist of a minimum of one gallon (4 liters) of material taken from the bulk container in a friction top container.

1057.2.4.4 Preformed Fiber Expansion Joint Filler

A sample shall consist of one piece, a minimum of 6 x 24 in. (150 x 600 mm). When the material is furnished in strips and the full sheet is not available for sampling, the sample width may be reduced from 6 in. (150 mm) to the width of the strip or a minimum of 4-1/2 in. (115 mm). For lesser widths, the material may be accepted by a manufacturer's certification to AASHTO M 213.

1057.2.4.5 Plastic Waterstop

A sample shall consist of two pieces, a minimum of 3 ft. (915 mm) long.

1057.2.4.6 Rubber Waterstop

A sample shall consist of two pieces, a minimum of 3 ft. (915 mm) long.

1057.2.4.7 Copper Sheeting for Flashing

A sample shall consist of one piece, a minimum of 6 x 12 in. (150 x 300 mm).

1057.2.4.8 Preformed Sponge Rubber Compound Expansion and Partition Joint Filler

A sample shall consist of one piece, a minimum of 6 x 12 in. (150 x 300 mm).

1057.2.4.9 Plastic Joint Compound for Vitrified Clay and Concrete Pipe

A sample of trowel grade, bulk type compound shall consist of approximately one gallon (4 liters) of material in a friction top can. A sample of extruded rope or flat tape shall consist of approximately 0.5 lb (230 g) of material in a friction top can or other suitable airtight container. Primer, if required to be used with extruded rope or flat tape types to maintain the material in position while pipe sections are being joined, shall be checked to insure that it has been recommended by the manufacturer of the joint material.

1057.2.4.10 Silicone Expansion Joint Sealant

A sample shall consist of two sets of tubes with 4 blending tips.

1057.2.4.11 Silicone Joint Sealant for Saw Cut and Formed Joints

A sample shall consist of two sets of tubes with 4 blending tips.

1057.2.4.12 Backer Rod

Backer rods shall be closed-cell as recommended by the silicone sealant manufacturer or shall be in accordance with ASTM D 5249, Type 3. A manufacturer’s certification will be provided by the contractor. No sampling or testing is necessary.

1057.3 Report (Records)

1057.3.1 Samples

Samples shall be recorded using SiteManager showing the manufacturer’s name, the brand name (as applicable), lot or heat number, net quantity represented, and the location where the sample was obtained using the Sampled From and Sample Origin fields of SiteManager. If the material is sampled after having a PAL ID assigned to it, the “Link To” field should be used to link the two sample records in SiteManager. Test results on random samples of material will be reported by the Central Laboratory.

1057.3.2 Supplier Notification

For material shipped directly to the jobsite by a supplier, the supplier shall notify Central Office Construction and Materials prior to shipment using Form 3 in Approved and Pre-Qualified Lists. When complete and correct information on the shipment is provided to Central Office Construction and Materials, a PAL ID number will be assigned to the material. That number shall accompany the material in shipment and be immediately available until the material is consumed.

1057.3.3 Material Purchased for Maintenance

Material purchased for maintenance work will be accepted in accordance with Specification [Sec 1057.2].

1057.4 Laboratory Testing for Sec 1057

1057.4.1 Scope

This guidance establishes procedures for Laboratory testing and reporting samples of material to be used in joints for concrete structures, concrete pavement, base, median, median strip, paved approach, curb, curb and gutter, gutter, and sidewalk.

1057.4.2 Procedure

1057.4.2.1 Dowel Bars

All dowel bars shall be tested for tensile and bending properties of plain rounds in accordance with AASHTO M31 Billet Steel; AASHTO M42, Rail Steel; or AASHTO M53, Axle Steel. Dowel bars, which are not epoxy coated shall be tested for mass variations. Test results and calculations shall be recorded through SiteManager.

1057.4.2.2 Tie Bars

Tie bars shall be tested in accordance with Reinforcing Steel for Concrete - Billet-Steel Deformed Bars. Tie bars, which are to be bent and straightened, shall be tested in accordance with paragraph 1036.7.1.1.1 and shall be grade 300 mPa (40). Test results and calculations shall be recorded through SiteManager.

1057.4.2.3 Concrete Joint Sealer, Hot-Poured Elastic Type

Samples shall be tested in accordance with Specification Sec 1057.1.3 for flow, penetration, resilience, bond, and Asphalt Compatibility. These tests will be completed on every fourth sample from a producer. If any of the tests fail, the producer's next sample will also be tested for the four properties and Asphalt Compatibility. The other samples not subjected to full testing will be tested for flow, penetration and resilience only to determine acceptance. Test results and calculations shall be recorded in Laboratory workbooks or on Work Form "Hot Pour Joint Sealer". Test results shall then be recorded through SiteManager.

1057.4.2.4 Preformed Fiber Expansion Joint Filler

Samples shall be tested for thickness, compression, recovery, extrusion, density, water absorption, and bitumen content in accordance with AASHTO M213. Test results and calculations shall be recorded through SiteManager. Bitumen content shall be originally recorded in a Laboratory workbook.

1057.4.2.5 Copper Sheeting

Copper sheeting for flashing shall be tested in accordance with the following methods:

Percent Copper - ASTM E53

Thickness and Elongation - AASHTO T68

Bend Properties - Specification Sec 1057.2.3

Test results and calculations shall be recorded through SiteManager. Percent copper shall be originally recorded in a Laboratory workbook.

1057.4.2.6 Sponge Rubber

Sponge rubber compound expansion and partition joint filler shall be tested for thickness, compression, recovery, extrusion, and density in accordance with Specification Sec 1057.2.4. Test results and calculations shall be recorded through SiteManager.

1057.4.2.7 Plastic Joint Compound

Plastic joint compound for vitrified clay and concrete pipe shall be tested in accordance with the following methods:

Percent Bitumen soluble in trichloroethylene and percent ash - AASHTO T44

Penetration - AASHTO T187

All test data and calculations shall be recorded in Laboratory workbooks. Test results shall then be recorded through SiteManager.

1057.4.3 Sample Record

The sample record shall be completed in SiteManager, as described in Automation Sec 3510, and shall indicate acceptance, qualified acceptance, or rejection. Appropriate remarks, as described in Reporting Test Results, are to be included in the remarks to clarify conditions of acceptance or rejection. Test results shall be reported on the appropriate templates under the Tests tab.