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在真空混凝土路面的施工中,主要采用的真空脱水装置与真空吸垫,专用真空泵及振动梁、抹光机、压纹机、真空混凝土试模等配套机具。 (一) 真空脱水装置: 在柔性真空吸垫未发明前,均采用刚性真空吸盘,即用钢板加工成具有足够刚度的封闭真空腔,在接触混凝土的一面布有3～6毫米直径的吸水孔,孔中心距约20毫米。其缺点是:笨重,操作不便;劳动强度大;操作人员多;反复使用后腔体焊缝易裂;周边密封困难;易漏气不能保证要求的真空度;加工复杂并且不易做成所需要的各种复杂形状;功率消耗大;吸水孔易堵塞;过滤布易损坏以及成本高,由于存在以上缺点,自从柔性吸垫问世后,一般均不再采用刚性
In the construction of the vacuum concrete pavement, the main vacuum dewatering device and vacuum suction pad, special vacuum pump and vibration beam, trowel, embossing machine, vacuum concrete test and other ancillary equipment. (A) vacuum dewatering device: Before the invention of the flexible vacuum suction pad, are used rigid vacuum suction cup, that is, processed into a closed steel vacuum chamber with sufficient rigidity in contact with the concrete side of cloth with 3-6 mm diameter suction holes , Hole center distance of about 20 mm. The disadvantages are: bulky, inconvenient to operate; labor intensive; many operators; chamber after repeated weld cracking; peripheral sealing difficulties; easy to leak can not guarantee the required degree of vacuum; complex processing and difficult to make the required Due to the above shortcomings, since the advent of flexible suction pad, the general are no longer used rigid