is less than specified and is determined to be significant as determined by criteria ‘B’, the Division shall decide on a course of action as described in Section 401.13.4.
401.8 -WEATHER RESTRICTIONS : Bituminous asphalt shall only be placed when the surface is dry and when weather conditions are such that proper handling, finishing, and compaction can be accomplished. In no case however, shall asphalt be placed when the surface temperature is below the minimum established in Table 401.8.
TABLE 401.8 Course Thickness Minimum Surface Temperature 3 inches and over 35 °F Note 1 1.5 to 2.9 inches 40 °F Less than 1.5 inches 50 °F
Note 1 In lieu of 35 °F, a minimum air temperature of 40 °F shall be used when paving directly on an aggregate base, subbase, or subgrade.
In addition to the above surface temperature requirements, no wearing courses shall be placed when the air temperature is less than 40°F.
401.8.1 -Cold Weather Paving: When the air temperature falls below 50° F or the surface temperature falls below 60° F the provisions for cold weather paving shall apply. Paving shall be performed so that the transverse j oints in adjacent lanes shall be no more than fifty ( 50) feet apart at the end of each day ’s paving operations. The surface temperature shall be taken a minimum of once every hour and shall be taken in all shaded areas. The temperature requirements as listed in Table 401.8 shall apply. It shall be the Contractor ’s responsibility to monitor the declining surface temperature to insure that material delivery from the plant be terminated so as to allow that all material can be placed prior to the surface temperature falling below the surface temperatures listed in Table 401.8. The temperature of the delivered material and the mat temperature at the time final density is obtained shall be taken for every truck load. These temperatures sha ll be in accordance with density is obtained.
401.9 -EQUIPMENT : 401.9.1 -Plants : All plants in West Virginia producing asphalt for the Division shall provide documented evidence of compliance with current requirements of the West Virginia Air Pollution Control Commission. All plants which are not in West Virginia but producing asp halt for the West Virginia Division of Highways shall provide documented evidence of compliance with current requirements of the laws and regulations of the State in which they are producing, applicable to air pollution. All plants shall meet the general requirements set forth in AASHTO M 156 unless it can be demonstrated to the satisfaction of the Engineer that a consistent quality mix can be produced with modifications to any of these requirements.