Key Points of Construction of Modified Asphalt and SMA Top L

[quangongzi]

Construction temperature control
As the viscosity of modified asphalt to ensure a high construction temperature of the construction of important technologies, but if the temperature is too high, commonly known as the mixture "fried paste", the modified asphalt will be a serious aging and loss of cohesion. If the temperature is not enough, the mixture can not mix evenly, can not be paved smooth, rolling is not real. To master the appropriate construction temperature should be based on the viscosity of the modified asphalt temperature curve to decide. General should pay attention to the following links:
A fiber stabilizer must be used. The fiber stabilizer plays a role in reinforcing, dispersing, absorbing and absorbing asphalt in asphalt mixture. As a result, the asphalt film is thickened, the structural asphalt is increased, the free asphalt is reduced, the road surface is not spilled, and the high temperature stability is improved. . Lignin fiber to remember to moisture, rain is strictly prohibited, must be kept dry.Small Road Roller - Shanghai Doan Machinery Technology Co.,Ltd

Mixer in the mixing of asphalt mixture when the drying temperature of the aggregate should be increased to 190 ℃ or more, otherwise the mixing mixture uneven.
Mixing a good mixture should not be long, the same day out of the day mixing, storage time shall not exceed 24 hours.
Paving rolling to go all out, all processes in the mixture temperature dropped to 125 ℃ before the end.
Do not wet in the lower deck, road bed temperature below 15 ℃ in the case of construction.
The SMA pavement of the test section, the aggregate heating temperature is controlled above 190 ℃, the asphalt heating control is about 180 ℃, and the factory temperature of asphalt mixture is controlled at 180 ~ 190 ℃. Final compression is done before the temperature of the mixture drops to 125 ° C. All aspects of the construction temperature than ordinary asphalt mixture is about 20 ℃ higher.
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