The Beijing-Tianjin-Tanggu expressway is a highway connecting Beijing, Tianjin and Tanggu, with a total length of 142.69 kilometers, of which Beijing section is 35 kilometers. The Beijing section of Beijing-Tianjin-Tanggu expressway has been operating continuously for more than 18 years since the Asian Games opened in 1990. The pavement is aging and damaged, and the cracking of asphalt pavement is one of the most important concentrated damages. Beijing-Tianjin-Tanggu expressway section of the Beijing section of more cracks, and some deep and deep cracks, heavy workload, so the use of mechanical irrigation joints.

(1) filling materials. Grouting material used from Singapore to introduce a new grouting material - high elastic sealant, the material adhesion and anti-aging ability.

(2) irrigation equipment. The United States Kelai Fu is the world's largest production of road maintenance equipment company, the project are the introduction of the company's equipment. Slotting machine using the United States to the company's Model-200 slot machine; cleaning machine using the company's hot air gun for clearance treatment; filling machine using the company's SS-125DC for filling joints.