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Pridružen/-a: 27.09. 2016, 06:54
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 Objavljeno: 13 Jan 2017 10:40 Naslov sporočila: Precautions for Construction of Emulsified Asphalt Seal |
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According to the design requirements for the preparation of emulsified asphalt with the matrix asphalt and emulsifier. The emulsified asphalt was prepared by the secondary heat mixing process. The emulsifier is dissolved in a certain amount of water, and then the latex and the stabilizer are added to adjust the appropriate pH value. Finally, the mixed solution is heated to a certain temperature, and the asphalt is heated to a certain temperature (the heating temperature is adjusted according to the base asphalt and the emulsifier, Test to determine, generally not more than 180 ��), according to the approved design mix to determine the ratio of oil-water ratio added to the above emulsifier solution, the shear by high-speed colloid mill until a uniform asphalt emulsion.
Emulsified asphalt should be stored in a vertical tank, and maintain the appropriate mixing, storage period to not segregate, do not freeze, do not break for the degree.
Emulsified modified asphalt spreading
Seal the use of emulsion modified asphalt surface treatment, the use of computer-controlled automatic asphalt spreading vehicle spraying emulsified asphalt, to ensure that the amount of cloth and sprinkling cloth. At room temperature, the amount of emulsified asphalt coating: 1 kg / m2 ~ 1.2 kg / m2. Spreading cloth to stabilize the speed of spreading to ensure the amount of spray, spray pipe and the road perpendicular to the vertical and have the appropriate height, require uniform spread, not exposed white, not heavy and do not leak, and may not form on the surface accumulation. After the sealing layer is spread, the stone with the specification (3 mm ~ 5 mm) shall be withdrawn with automatic gravel spreader.
In the spraying of sealing oil, the spray pipe in the outer end of the spray pipe to set the metal cover or the use of plastic film on the hard shoulder, curbs, guardrail and other facilities to block, to prevent contamination by asphalt.
(2) In case of rain during the construction, should be fully dry under the conditions of the next layer of spreading; (3) in the spreading process, the spread of the cloth, the spread of the asphalt cloth, Should be maintained at a uniform speed, to ensure uniform spread; �� in the spreading process, should pay attention to the joint treatment. It mainly includes the treatment of transverse joint and longitudinal joint. Horizontal joint treatment: In the horizontal joints, re-construction can be spread in each transverse joints before the use of linoleum or geotextile and other materials will be covered by spreading the road section, and then spread. Treatment of longitudinal joints: in the second spreading, in the longitudinal direction should be a certain amount of overlap with the previous spreading of the asphalt. The overlap width is generally between two adjacent nozzles
distance. NOTE Ensure that the outermost nozzle is on the same line as the connector edge.<a href="http://doublesteelroller.com">Double Steel Roller - Road Machinery Equipment Manufacturers - Doan Machinery</a>
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