Published by department of transportation

37-3.04 PAYMENT

The payment quantity for micro-surfacing is the weight determined by combining the weights of the aggregate and micro-surfacing emulsion. The payment quantity for micro-surfacing does not include the weights of added water and set-control additives.

37-4.01 GENERAL

37-4.01A Summary

Sealing a parking area consists of spreading a mixture of asphaltic emulsion, aggregate, polymer, and water on a parking area pavement surface.

37-4.01B Definitions

37-4.01C Submittals

At least 10 days before starting placement, submit the name of a laboratory to perform testing and mix design.

At least 10 days before starting placement, submit a laboratory report of test results and a proposed mix design. The report and mix design must include the specific materials to be used and show a comparison of test results and specifications. The mix design report must include the quantity of water allowed to be added at the job site. The laboratory performing the tests must sign the original laboratory report and mix design.

If the mix design consists of the same materials covered by a previous laboratory report, you may submit the previous laboratory report which must include material testing data performed within the previous 12 months for authorization.

If you request substitute materials, submit a new laboratory report and mix design at least 10 days before starting placement.

At least 10 days before use, submit the manufacturer's data for oil seal primer and polymer.

Submit a certificate of compliance for the parking area seal material.

37-4.01D Quality Assurance

37-4.02 MATERIALS

37-4.02A General

Asphaltic emulsion must be either Grade SS1h or CSS1h, except the values for penetration at 25 degrees C for tests on residue from distillation must be from 20 to 60. You may use clay-stabilized emulsion with a solids content not less than 45 percent by weight.

Polymer must be either neoprene, ethylene vinyl acetate, or a blend of butadiene and styrene.

Oil seal primer must be a quick-drying emulsion with admixtures. Oil seal primer must be manufactured to isolate the parking area slurry seal from pavement with residual oils, petroleum grease, and spilled gasoline.

Crack sealant must comply with section 37-5.

Water must be potable and not separate from the emulsion before the material is placed.

37-4.02B Mix Design

37-4.02C Proportioning

Store the parking area seal in a tank equipped with mixing or agitation devices. Keep stored materials thoroughly mixed. Protect stored materials from freezing conditions.

37-4.03 CONSTRUCTION

37-4.03A General

37-4.03C Surface Preparation

If cracks in the existing parking area pavement surface are greater than 1 inch wide, the Engineer orders the repair. This work is change order work.

After any crack treatment and before placing parking area seal, clean the pavement surface, including removal of oil and grease spots. Do not use solvents.

If cleaning the pavement surface with detergents, thoroughly rinse with water. Allow standing water to dry before placing parking area seal.

You must seal oil and grease spots that remain after cleaning. Use an oil seal primer and follow the manufacturer's instructions.

If the pavement surface has oil or grease spots that do not come clean and sealing is insufficient, the Engineer orders the repair of the pavement. This work is change order work.

37-4.03D Placement

Add polymer at the job site in the Engineer's presence.

If adding water at the job site based on the manufacturer's instructions for consistency and spreadability, do not exceed 15 percent by volume of undiluted asphaltic emulsion.

Before placing the parking area seal, dampen the pavement surface using a distributor truck. Place the seal on the damp pavement but do not place it with standing water on the pavement.

Place the parking area seal in 1 or more application. The seal must be uniform and smooth, free of ridges or uncoated areas.

If placing in multiple applications, allow the last application to thoroughly dry before the subsequent application.

Do not allow traffic on the parking area seal for at least 24 hours after placement.

Do not stripe the parking area seal until it is dry.