Chemical & Physical Properties

Material Safety Information

Recommended Practices

Application

Purpose: To recover, stabilize and increase the strength of existing road aggregate materials.

The road surface must be milled or pulverized with reclaiming equipment such as a CMI RS 650 or Caterpillar^® RM-350 or similar equipment capable of milling to a depth of 6 inches. The road should be milled to a depth of 4-6 inches (10-15 cm). Although less it is less desirable, a road can be scarified to a similar depth with a scarifying blade attachment.

The aggregate gradation should follow the following recommendations:

The maximum aggregate size should not exceed 1.5 inches (38 millimeters).

The amount of aggregate material passing the #200 sieve should not exceed 20%.

Roadway imperfections should be corrected prior to pulverization. Examples of such imperfection include sub-grade failures, insufficient aggregate, and/or lack of proper drainage. After the road has been milled, the aggregate should be tested to ensure the proper aggregate size has been achieved and any inconsistencies in aggregate are corrected.

A 4:1 dilution of water to PennzSuppress^® D is applied at a rate of 0.5 gallons per square yard (2.25 liters per square meter) over the loose aggregate.

The treated aggregate is thoroughly mixed by either using the pulverizing equipment or thoroughly blade mixing the treated aggregate by windrowing the material from one side of the road to the other.

A second application of PennzSuppress^® D is applied at a dilution of 4:1 and a rate of 0.5 gallons per square yard (2.25 liters per square meter). Like the first treatment, this second application is thoroughly mixed throughout the road base material. 

After mixing, the aggregate must be profiled per applicable construction engineering specifications.

Prior to compaction, the road materials must be at or very close to optimum moisture. In the field, this can be approximated by conducting a hand-squeeze test. If the material is at the appropriate moisture content, it will squeeze together in the palm of a hand and not fall apart or crumble, nor will it bleed any free liquid. If the road is too moist, it can be dried by blading and allowing dehydration during daytime heating. If the road material is too dry to provide at least 95% compaction, additional water should be added and remixed with the soil prior to compaction.

The road should then be compacted to the density outlined in the applicable state highway construction manual but never less than 95% of the standard Proctor Maximum dry density. Ideally, a pneumatic rubber-wheel roller is used and then followed by a vibratory steel drum roller.

A final surface treatment of PennzSuppress^® is applied at a dilution of 4:1 and a application rate of 0.25 gallons per square yard (1.125 liters per square meter).

The road should be allowed time to dry prior to adding an overlay wearing surface to the road base. The time required will depend primarily on ambient temperatures, exposure to the sun  and relative atmospheric humidity. For example, if the daily high temperature is 90^oF (32^oC), three days should be allowed for thorough drying.

EQUIPMENT AND MATERIAL NEEDS

Milling/reclaiming machine such as a CMI RS 650 or Caterpillar RM-350 or other equivalent equipment capable of milling to a depth of 6 inches (15 cm).

A liquid application truck with a pressurized spray bar designed to apply the product evenly over the prepared aggregate surface.

Motor grader with the proper blade attachment(s).

A pneumatic rubber-wheel roller and vibratory steel drum roller.

0.25 gallons of PennzSuppress^® D per square yard (1.125 liters per square meter) of application.

For example, for one mile of roadway, 24 feet wide, 3,520 gallons of PennzSuppress^® D is required. Metrically, a road 6 meters wide and one kilometer long would require 1000 X 6 X 1.125 liters per square meter, or 6,750 liters.

A source of potable water to dilute the concentrated PennzSuppress^® D to a 4:1 water to product dilution. Alternately, non-potable sources of water can be used, but should be evaluated prior to use.