Modification of flexible PB type polymer asphalt Waterproof coating -Construction materials of China Railway 15th Bureau
PB type polymer modified asphalt waterproof coating It is a national key science and technology promotion project, and has been approved by the National Status Department door Identified by relevant personnel of, reaching the level of * * * of similar products. The product has been tested by the Highway Engineering Testing Center of the Ministry of Communications, and all technical indicators meet the requirements of JC/T975-2005 (PB) standard; Comply with JTT041-2000 (Technical Code for Construction of Highway Bridges and Culverts).
2、 Construction process of PB polymer modified asphalt waterproof coating:
Cleaning the base course - treatment of key parts - the first waterproof layer - the second waterproof layer - the third waterproof layer (multiple spraying can be carried out according to the construction requirements) - curing the waterproof layer - paving asphalt concrete
1. Amount of PB polymer modified asphalt waterproof coating:
The general surface course is 1.5-3 kg/㎡, and can be adjusted according to the engineering grade.
2. Precautions for construction of PB polymer modified asphalt waterproof coating:
① Before construction, brown brush and brush shall be fully soaked to make them soft and smooth.
② No construction is allowed when the temperature is below 0 ℃ or above 35 ℃ (high-temperature construction shall be avoided).
③ The storage and transportation temperature is 5 ℃ - 35 ℃.
④ The construction shall be carried out in the weather without rain and snow within 4 hours.
⑤ It is forbidden to step on or drive on the vehicle before the film is dry or asphalt is paved.
⑥ The construction tools shall be washed with water immediately after use for reuse.
3. Packaging and shelf life
Packed in 50kg plastic drum or 200kg iron drum, the shelf life is 12 months.
Logistics timeliness
Guangzhou Jiabaili Waterproof Engineering Co., Ltd., located near Guangzhou Baiyun Logistics Park, has a nationally developed logistics network system. It must arrive in 2-3 days in South China, East China, Central China and Southwest China, and in 3-4 days in other regions.
Recently, with the Huihe River in northern Anhui Steel pipe The piles have been removed in succession, and the environmental protection work for the water construction of Huaihe Super large Bridge of Beijing Shanghai High speed Railway across Huihe River, which was constructed by China Railway Construction 15th Bureau Group, will come to a successful end. The beautiful scenery of blue water, blue sky, and shuttling boats will show along the Beijing Shanghai High speed Railway.
The Huihe River system bar arch bridge spans the fourth class channel, Class III water body, and the upper span of the channel is 96m. The method of beam first and then arch is adopted for construction. The prestressed concrete box section with single box and three chambers is adopted. The pile foundation is constructed by island building method. The construction technology is new and difficult. It is a heavy and difficult project in the Beijing Shanghai high-speed railway section of the Group.
Since the commencement, the headquarters has vigorously implemented environmental protection measures in strict accordance with the requirements of Beijing Shanghai Company for "building environment-friendly projects". Start from the source, realize the whole process control, take the construction scheme as the guarantee, and implement the environmental protection work. In order to avoid the impact of mud on river flow during drilling construction, the island construction scheme was adopted in the construction, which changed the construction in water into the construction on land. In the process of drilling construction, optimizing the construction process and reducing the amount of mud not only ensure the construction quality, but also accelerate the construction progress; After sedimentation, the clear water in the upper layer can be reused after reaching the standard, and the slurry in the lower layer can be excavated and dried in the air before being transported to the spoil ground for proper treatment. After the completion of the main works, the dredger shall be used to clean, excavate and transport the island soil in the river channel, pull out the steel pipe piles, and restore the normal passage of the channel.
