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OHIO STATE AID ROAD WORK; EXPERIMENTAL ROAD; APPLYING CARBO-VIA.

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OHIO STATE AID ROAD WORK; EXPERIMENTAL ROAD; TAROID SECTION.

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OHIO STATE AID ROAD WORK; EXPERIMENTAL ROAD; APPLYING TARVIA X.

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OHIO STATE AID ROAD WORK; EXPERIMENTAL ROAD; TARVIA X.

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This section was constructed in accordance with the specifications for water-bound macadam now in use by the State Highway Department. The road is built in two courses, the methods employed on the two courses being identical. The stone ranges in size from three inches to one and one-half inches. The stone is first rolled dry until there is no longer any waving or creeping movement, and the voids are reduced to a minimum. Dry screenings varying in size from one-half inch to dust are then applied during the finishing process of dry rolling. When the voids are completely filled, water is freely applied and the rolling continued until a wave of limestone grout appears in front of the roller as it passes over the surface. After the surface has been treated in this manner it is allowed to dry out or set before traffic is permitted to pass over it. The cost of this section is as follows:

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