Prestressed pipe pressure slurry's choice of coarse aggregate

Prestressed pipe pressure slurry prestressed pipe pressure prestressed pipe pressure slurry paste manufacturer price coarse aggregate maximum particle size should be according to the concrete structure and construction method, but the largest size shall not exceed the minimum edge structure size 14 and reinforced the minimum clear distance 3/4; In double layer or multilayer densely steel structure, the largest size shall not exceed the minimum reinforcement net from 1/2, and shall not exceed 75. 0mm。 Coarse aggregate of concrete solid slab maximum particle size should not be more than a third of the thickness and shall not be more than 37. 5mm。 Pumping concrete as coarse aggregate particle size of the largest, besides should comply with the stipulations of the above, the gravel shoulds not be more than 1/3 of the conveying pipe diameter; The pebble shoulds not be more than half of the conveying pipe diameter. 5. Before the construction, should use coarse aggregate alkali activity of inspection, in conditions permit time avoid using active alkali-aggregate reaction of coarse aggregate, must be used when necessary inhibiting measures should be taken. Inspection group of entering the arena of coarse aggregate shall be 6 conform to this specification. 3. 2 of the ordinance, inspection content should include appearance, particle gradation, needle flake particle content and silt content, the content of soil, the crush value indicators, such as inspection test methods should be consistent with the current industry standard aggregate for highway engineering test procedures ( 夹具E42) The provisions of the. Coarse aggregate in the process of production, transportation and storage, shall not be harmful material affect the performance of concrete mixed people. Coarse aggregate pile separately according to the varieties, specifications shall not be mixed. When loading and unloading and storage, measures should be taken to, make uniform aggregate grading, and keep clean.