Asphalt concrete material in the Zhuhai-Hong Kong-Macao Bridge

• Posted by Mavis Chai September 12, 2024 Filed in Technology #asphalt concrete  #asphalt batching plant  29 views
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  Asphalt concrete material in the Zhuhai-Hong Kong-Macao Bridge project
  The Zhuhai-Hong Kong-Macao Bridge (which should be the Hong Kong-Zhuhai-Macao Bridge) has indeed used asphalt material. Specifically, the pavement of the Bridge uses asphalt concrete, and the service life standard of the asphalt concrete is set at 15 years. This asphalt concrete pavement has some unique features and advantages.

  Material characteristics

  The asphalt concrete pavement of the Hong Kong-Zhuhai-Macao Bridge uses imported natural lake bottom asphalt, which is mixed with stone in different proportions, forming a unique pouring asphalt concrete. This asphalt material has small pores, which can prevent water erosion on the steel plate and provide secondary protection for the steel plate. At the same time, its cooperative deformation ability is good, which can deform synchronously with the steel box beam, and bond closely with the ordinary asphalt of the upper layer.

  Construction technology

  The road surface of the Hong Kong-Zhuhai-Macao Bridge adopts the construction technology of pouring asphalt concrete, that is, pouring and laying asphalt concrete directly on the steel bridge surface. This process puts forward very high requirements for the performance of sand and stone aggregate. The asphalt fine aggregate raw materials used in the Hong Kong-Zhuhai-Macao Bridge include diabase, limestone, granite, basalt, etc., and the specification is 10-30mm.

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  Performance requirements

  Due to the complex Marine environment of the Hong Kong-Zhuhai-Macao Bridge, extremely strict requirements are put forward for the pavement structure and materials of the bridge deck. The asphalt mixture needs to maintain excellent fatigue resistance to cope with the continuous vibration and large deformation under the vehicle load and wind force. At the same time, in the hot environment, asphalt materials also need to have better high temperature rut resistance performance.

  Environmental protection and durability

  The asphalt materials of the Hong Kong-Zhuhai-Macao Bridge pay attention to environmental protection and energy saving in the production and construction process, and its excellent durability also ensures the long-term stability and safety of the bridge road surface.

  
  To sum up, the asphalt material is indeed used in the Hong Kong-Zhuhai-Macao Bridge project, and this asphalt material has high requirements and standards in terms of performance, construction technology and environmental protection. Together, these measures ensure the pavement quality and service life of the Bridge.

  The equipment to manufacture this asphalt concrete material is mainly asphalt mixing station, which can also be called asphalt concrete mixing station or asphalt concrete mixing station. This is a kind of complete set of equipment used for mass production of asphalt concrete, can produce asphalt mixture, modified asphalt mixture, color asphalt mixture, etc., is the necessary equipment for the construction of expressways, grade roads, municipal roads, airports, ports.

  The asphalt mixing plant mainly consists of the following parts:
  Batching system: it is responsible for the batching of various raw materials (such as stone, sand, mineral powder, etc.) according to the set proportion.
  Drying system: heat and dry the aggregate through heating drum and other equipment to remove the moisture and raise the temperature of the mixture.
  Combustion system: Provide a heat source for the drying system, usually using fuel oil or gas burners.
  Hot material lifting, vibrating screen and hot material storage bin: lift the dried aggregate to a certain height, screen them through the vibrating screen, and then store them in the hot material storage bin.
  Weking mixing system: weigh all kinds of raw materials in precise proportion and send them into the mixing pot for mixing to form uniform asphalt concrete.

  Asphalt supply system and powder supply system: respectively responsible for providing asphalt and other powder to the mixing pot.
  Dust removal system: used to collect and treat the dust produced in the production process to protect the environment.
  Finished product bin and control system: store the mixed asphalt concrete in the finished product bin, and the whole production process is monitored and managed through the control system.
  According to the different mixing methods and handling methods, the asphalt mixing station can be divided into many types. For example, it can be divided into forced intermittent and continuous production; fixed, semi-fixed and mobile. Each type has its own specific applicable scenarios and advantages.

  In major projects such as the Hong Kong-Zhuhai-Macao Bridge, the asphalt mixing station used must be carefully designed and strictly selected to ensure that the asphalt concrete materials produced can meet the high standards and strict requirements of the project. At the same time, in order to cope with the complex Marine environment and harsh construction conditions, these equipment also need to have high reliability, high efficiency, environmental protection and energy saving characteristics.