ELASTOMERIC CONCRETE FOR CONCRETE REPAIR

GENERAL

Elastomeric concrete used for concrete repair shall meet the requirements of applicable Iowa Department of Transportation Specifications. Acceptance of elastomeric concrete for use in Department of Transportation projects will be on the basis of approved manufacturer and brand name. Approved manufacturers and brand names of elastomeric concretes are listed in the Materials Approved Products Listing Enterprise (MAPLE).

MANUFACTURER AND BRAND NAME PPROVAL

To obtain approval for elastomeric concrete, the manufacturer shall submit the following items to the Construction and Materials Bureau in Ames, Iowa:

1. Product identification including brand name and product number

2. Complete manufacturer recommendations for usage

3 A current Material Safety Data Sheet (MSDS)

4 A sample consisting sufficient material for laboratory evaluation.

LABORATORY EVALUATION FOR APPROVAL

In order to be placed on this approval list, an elastomeric material shall meet the following criteria.

A. Compressive Strength (ASTM C109/C579, Method B)

Three 2-in. cubes cured for 24 hours at 73 ± 4°F before testing.

Cure time Strength, psi

                                    24.0 hours                                     2000 minimum

The compressive strength provided by independent laboratory will be acceptable for the approval evaluation.

B. Bond to Concrete by Slant Shear (ASTM C882)

Wet Bond

· Soak dummy section for 24 hours

· Allow dummy section to air dry for 15 minutes then air blast surface

· Apply primer to dry surface of dummy section

· Allow to cure 30 minutes

· Mix elastomeric concrete according to manufacturer’s recommendation

· Cast the material against dummy section

· Cure at 73 ± 4°F before testing at 24 hours.

Cure time Strength, psi

                                    24 hours                                        300 minimum

Manufacturer shall provide the slant shear strength (ASTM C882) tested by independent laboratory for the evaluation.

CERTIFICATION

The manufacturer shall file a certification with the Construction and Materials Bureau at the beginning of each calendar year stating that the material supplied during that year is identical with the formulation previously tested and approved.