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3719 Hot-Poured, Crumb-Rubber Type Crack Sealer 3719.1 SCOPE

This document specifies requirements for hot-poured, crumb-rubber type crack sealers used for sealing cracks in concrete and bituminous pavements. It outlines physical and packaging requirements, including that the sealant must contain at least 18% recycled rubber and meet standards for bond strength, resilience, softening point. Samples will be taken and tested by the Materials Engineer to ensure the sealant meets specifications.

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83 views1 page

3719 Hot-Poured, Crumb-Rubber Type Crack Sealer 3719.1 SCOPE

This document specifies requirements for hot-poured, crumb-rubber type crack sealers used for sealing cracks in concrete and bituminous pavements. It outlines physical and packaging requirements, including that the sealant must contain at least 18% recycled rubber and meet standards for bond strength, resilience, softening point. Samples will be taken and tested by the Materials Engineer to ensure the sealant meets specifications.

Uploaded by

Tally Anu
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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3700’s

3719 HOT-POURED, CRUMB-RUBBER TYPE CRACK SEALER

3719.1 SCOPE
Provide hot-poured, crumb-rubber type crack sealer for sealing cracks in concrete and bituminous
pavements and miscellaneous structures.

3719.2 REQUIREMENTS
Provide crack sealer material meeting the following requirements:

(1) On the Approved Products List,


(2) Consists of asphalt and crumb rubber blended together by the manufacturer to produce a
homogeneous mixture,
(3) When melted, the sealer does not separate or settle, and
(4) Uniform consistency suitable for filling joints and cracks without inclusion of large air holes or
discontinuities.

A Physical Requirements
Provide crack sealer meeting the requirements of ASTM D 6690, Type I with the following modifications
in Table 3719-1 after one cycle of heating to the manufacturer’s maximum heating temperature, cooling, and
reheating to the manufacturer’s maximum heating temperature.

Table 3719-1
ASTM D 6690, Type I Modifications
Test Specification
Recycled rubber, mass ≥ 18% of asphaltic components
Bond Test, 50% extension at 0° F [-18° C]* No adhesion or cohesion bond failure after
5 cycles
Resilience at 77° F [25° C] ≥ 40%
Softening point ≥ 180 °F [82° C]
* Use sawed cement mortar blocks or asphalt HMA blocks prepared using the method found in
the MnDOT Laboratory Manual.

B Packaging and Marking


Package and ship the sealer material in boxes weighing no greater than 50 lb [23 kg]. Mark the boxes with
the following information:

(1) Material name,


(2) Manufacturer name,
(3) Brand name,
(4) Weight,
(5) Batch number, and
(6) Maximum heating temperature recommended by the manufacturer.

3719.3 SAMPLING AND TESTING


A Sampling
Provide samples at rates and sizes meeting the requirements of the Schedule of Materials Control or as
required by the contract.

The Materials Engineer will perform tests on samples taken from the product proposed for use. Submit to
the Engineer a manufacturer’s Certificate of Compliance for each sealer batch.

B Methods of Test
Perform tests meeting the requirements of ASTM D 5329, except, perform the bond test using sawed
cement mortar blocks or asphalt HMA blocks (consistent with the pavement type) prepared in accordance with the
methods in the Laboratory Manual.

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