1053Concrete Sealer and Concrete Crack Filler

1053.10.1 Scope. This specification covers concrete sealers for the protection of concrete against damage from

de-icing chemicals.

1053.10.2 Acceptance. All material under this specification shall be obtained from a source identified on the

PAL designated for this specification. All material under this specification will be inspected and accepted in accordance with Sec 106. ASTM and AASHTO specifications, when referenced, control only the physical and chemical properties of the material.

1053.10.3 The sealer shall be a alkyltrialkoxysilane, with low oligomer and polymer compound content. The

chemical composition shall meet the following requirements: Property Specification Purity 95% minimum monomer by weight Solvent Less than 5% by weight Residue Less than 2% by weight Density Per the manufacturer's recommendation Flash Point ASTM D93: greater than 125 degrees F Dry Time ASTM D1640 Sec 7.5.1: One hour or less

1053.10.3 1The ASTM D1640 test shall be performed on a concrete surface. This concrete shall be a mix design

called for in Sec 1053.10.3.2. The application rate shall be the same rate specified in Sec 703.

1053.10.3 2 The sealer shall meet the following performance criteria based on a single application at the

application rate specified in Sec 703. MoDOT reserves the right to verify any qualification tests at their expense on any field application. Test specimens shall be produced using either the MoDOT Class B-2 concrete in accordance with Sec 501 or the concrete mix specified by the test being performed. Test Test Method Duration Max Absorption / Cl- Water Immersion ASTM C642 48 hours 0.5 percent by weight (mass) Water Immersion ASTM C642 50 days 1.5 percent by weight (mass) Salt Water Ponding (based on non-abraded specimen) AASHTO T259 90 days 80% min reduction in Cl- absorption & 0.50 lbs/cu yd Cl- at a depth of 1/2” - 1” max

1053.10.3 3 The sealer shall not permanently stain, discolor or darken the concrete. Application of the sealer

shall not alter the surface texture or form a coating on the concrete surfaces.

1053.10.3 4 The sealer shall not leave residue on glass, painted metal or automobiles.

1053.10.3 5 The sealer shall not reduce the bond of pavement markings or reduce the skid resistance of the

surface being sealed. Any sealer determined to have these adverse effects will be removed from the pre- qualified list.

1053.10.3 6 The sealer shall be delivered to the project in unopened containers with the manufacturer’s label

identifying the product and with the seal(s) intact. Each container shall be clearly marked by the manufacturer with the following information:

1053.10.4 Manufacturer and Brand Name Approval. Prior to approval and use of concrete sealers, the

manufacturer shall submit to Construction and Materials a certified test report from an approved testing laboratory showing specific test results conforming to the requirements of these specifications. The certified test report shall also contain the manufacturer’s name, product brand name, lot number and date of manufacture. Upon approval of the certified test report by the engineer the manufacturer and brand name will be added to the PAL designated for this specification. New certified test results shall be submitted any time the manufacturing process or the sealer formulation is changed, and may be required by the engineer when sampling and testing of material offered for use indicates nonconformance to any of the requirements herein specified. SECTION 1053.20 CONCRETE CRACK FILLER

1053.20.1 Scope. This specification covers concrete crack fillers for the protection of concrete against damage

from de-icing chemicals.

1053.20.2 Acceptance. All material shall be obtained from a source identified on the PAL designated for this

specification, except as otherwise listed below. All materials under this specification will be inspected and accepted in accordance with Sec 106.

1053.20.3 The concrete crack filler shall be a low viscosity polymer. The chemical composition shall meet the

following requirements: Property Test Method Specification Viscosity AASHTO D-2393 Less than or equal to 25 cps Gel Time AASHTO T-237 Less than or equal to 20 minutes @ 70 deg F Tensile Strength ASTM D638 Greater than or equal to 1500 psi Elongation ASTM D638 Greater than or equal to 5% Solids Content Greater than or equal to 95% Flash Point ASTM D1310 Greater than or equal to 50 deg F Cure Rate AASHTO T-237 Less than or equal to 3 hrs@ 70 deg F

1053.20.4 The concrete crack filler shall meet the procedures and the application rates as specified in Sec 704.

MoDOT reserves the right to verify any qualification tests at their expense on any field application.

1053.20.5 Manufacturer and Brand Name Approval. Prior to approval and use of concrete crack fillers, the

manufacturer shall submit to Construction and Materials a certified test report from an approved testing laboratory showing specific test results conforming to the requirements of these specifications. The certified test report shall also contain the manufacturer’s name, product brand name, lot number and date of manufacture. Upon approval of the certified test report by the engineer the manufacturer and brand name will be added to the PAL designated for this specification. New certified test results shall be submitted any time the manufacturing process or the crack filler formulation is changed, and may be required by the engineer when sampling and testing of material offered for use indicates nonconformance to any of the requirements herein specified.