Rollers. The type of rollers to be used and their relative position in the compaction sequence shall generally be the Contractor’s option, provided the specified densities are attained. An exception shall be that pneumatic tired rollers shall be used for compaction of the wearing course beginning October 1st of any year through March 31st of the following year. Coverage with a steel wheel roller may precede pneumatic tired rolling. Operation of the roller shall be in accordance with the manufacturer’s recommendations. The use of equipment that results in crushing of the aggregate will not be permitted. Rollers producing pickup, washboard, uneven compaction of the surface, or displacement of the mixture, or other undesirable results shall not be used.
Rollers. Use rollers of carpet, velvet back or high-pile sheep's wool as recommended by the manufacturer for the material and texture required.
Rollers. Heavy-duty rollers with steel ball-bearings in case-hardened steel races, mounted with varying projections to suit slope of track. Provide 3-inch- diameter roller tires for 3-inch- wide track and 2-inch- diameter roller tires for 2-inch- wide track.
Rollers. A minimum of two self-propelled pneumatic tire rollers weighting no less than 5 tons or more than 10 tons and consist of 2 axles on which are mounted not less than 9 pneumatic-tired wheels in such manner that the rear group of tires will not follow in the tracks of the forward group. The axles shall be mounted in a rigid frame provided with a loading platform or body suitable for ballast loading. The tires shall be uniformly inflated. If required, one 5-8 ton static steel wheel roller shall be provided.
Rollers. Use rollers so designed that the effective weight can be increased as required to obtain specified compaction.
Rollers. Use a minimum of two 10-16 ton self-propelled pneumatic-tired rollers on the project unless otherwise requested by the Engineer.
Rollers. The following is added at the end of this section: Use of rollers in the vibratory mode compacting downhill is prohibited unless approved by the Engineer.
Rollers. The Contractor shall use the number, weight and types of rollers as necessary to obtain the required compaction, however, at a minimum, furnish at least three (3) rollers conforming to the following:
Rollers. Furnish at least three (3) rollers conforming to the following:
Rollers. Unless otherwise shown on the plans, furnish light pneumatic-tire rollers in accordance with Item 210, “Rolling.”
