Temperature Control Technology for Construction of Jinsha River Bridge
Table 5
Temperature control standard of cap.
Serial number
Temperature control item
Control standard
Basis
1
Pouring temperature of concrete
≤26°C
Construction conditions and calculation results of temperature control
2
Maximum internal temperature of concrete
≤65°C
《Code for construction of mass concrete》 (GB 50496-2018); 《code for construction of concrete structures》 (GB50666-2011); calculation results of temperature control
3
Temperature difference between inside and outside of concrete (including equivalent temperature of concrete shrinkage)
≤20°C
4
Cooling rate inside casting concrete
≤2.0°C/d
5
Temperature difference between surface and atmosphere of pouring concrete
≤20°C
6
Temperature difference between inlet and outlet of cooling water
≤10°C
《Technical code for construction of highway bridges and culverts》 (JTG/TF50-2011)
7
The temperature difference between the cooling water and the inside concrete when the water is first supplied or resupplied after interruption
≤25°C
《Technical specification for temperature crack control of mass concrete in water transport engineering》 (JTS 202-1-2010)
8
Temperature difference between curing water and concrete surface
