Slurry sealing is a construction method for road construction and maintenance. In the construction of slurry sealing layer, slurry refers to the emulsified asphalt mixture mixed into a slurry state, and then paved on the road surface. Due to the moisture content in the emulsified asphalt, the paving thickness is required to be less than 1 cm. The construction of slurry sealing layer can be carried out manually, but manual paving has certain limitations, and it is usually suitable for repair construction in a small area. Below, we will focus on the materials and equipment used in machine paving.
Emulsified asphalt is a binder material in the construction of slurry seal. According to the construction needs, you can choose slow-cracking or slow-cracking fast-setting emulsified asphalt.
2.aggregates.
Aggregate is an important part of slurry sealing layer construction, which provides the coarse and fine aggregate required for asphalt mixture. The aggregate needs to have a certain gradation of mineral material, that is, there are large materials and small materials. The large material is mainly used to increase the wear resistance and anti-slip resistance of the road surface, while the small material is used to improve the compactness of the whole mixture and play the role of waterproofing.
3.additives or cement.
Depending on the compatibility of the stone with the emulsified asphalt, additives or cement may need to be added to improve the properties of the slurry mixture.
2. Equipment. The main equipment for slurry sealing construction is slurry sealing machine and other auxiliary equipment required for sealing construction.
1.Slurry sealer.
Slurry sealing machine is a kind of equipment specially used for slurry sealing layer construction. All the materials required for the test are loaded into tanks or silos as required, and the emulsified asphalt and stone are mixed through the mixer, and then evenly paved onto the road surface.
2.Ancillary Equipment.
Other ancillary equipment such as transporters, signage, road cones, etc., may also be required for closure construction to ensure that the construction proceeds smoothly.
Third, the construction method.
Before construction, the road surface should be cleaned to ensure that the road surface is smooth and clean, and there is no oil and other debris. Then, all the materials required for the test are loaded into the tank or silo of the slurry sealer according to the requirements. The emulsified asphalt and stone are mixed by a mixer and evenly paved onto the road surface. During the paving process, a certain speed and thickness should be maintained to ensure the uniformity and compactness of the slurry mixture. Finally, the paved slurry mixture is maintained and solidified, and it can be opened to traffic after it meets the requirements.
4. Precautions.
In the construction of slurry sealing layer, the following points should be noted:
1.Strictly control the quality of materials to ensure that the emulsified asphalt and aggregates meet the design requirements;
2.The emulsified asphalt and aggregate are mixed according to the specified ratio to ensure the uniformity, cohesiveness and stability of the mixture
3.In the paving process, the driver should drive according to the wire, and the operator should pay attention to the paving thickness and oil-stone ratio
4.Paved roads should be avoided from pedestrians and vehicles;
5.During the construction process, attention should be paid to the implementation of safety measures to ensure the safety of construction personnel and equipment.
In short, slurry sealing layer construction is a simple and effective road construction and maintenance method. In the construction process, attention should be paid to the selection and control of materials, the selection and use of equipment, and the mastery and implementation of construction methods. Only in this way can we ensure that the quality and effect of the slurry sealing layer construction meet the design requirements.