2. The Exhaust Pipe of Kitchen and Toilet in Residential Buildings (JG/T 194-2006) promulgated by the Ministry of Construction is applicable to exhaust pipes made of various raw materials (except sulphoaluminate cement and portland cement, raw materials must obtain relevant new material application certificates).
3. The building materials industry standard "Glass Fiber Reinforced Cement Smoke Exhaust Pipe" (JC/T854—2008) promulgated by the National Development and Reform Commission is applicable to the residential smoke exhaust pipes made of sulphoaluminate cement and silicate cement with alkali-resistant glass fiber mesh. Sulfoaluminate cement and portland cement are the raw materials of exhaust port with stable performance.
process flow
1. When the main structure is constructed, ventilation flue holes shall be reserved according to the position of design drawings, and the hole size is 50 ~ 80 mm more than the peripheral size of components. The steel bars in the reserved holes should also be reserved.
2. Before installation, according to the size of ventilation flue, hang vertical holes from the top to ensure the verticality of flue installation.
3. When installing the first layer, first level it with 1:2 cement mortar. After the first section of pipe joint is grouted, C20 concrete about 40cm high is poured in the pipe; After the concrete is finally set, install the upper ventilation flue.
4. First, put the lower mouth of the joint into the upper mouth of the lower flue partition, and seal its four sides with cement slurry. Ventilation flue should be supported by layers. Construction practice: After grouting the upper and lower pipes, the interface of the upper and lower ventilation flue is generally located at the floor, so the Ф12 steel bar is welded at the embedded steel plate at the root of the pipe and welded with the steel bar reserved in the hole, and supported on the floor foundation.