Cradle to Gate
Identity ID
7375ff7b-447f-40c1-97be-2136583bdf57
Materials
Associated ID
757e767f-28aa-4ff9-99fb-688d2fdc3e48
Included activities starts
Included activities ends
Description
The product represented by this dataset is a concrete pole, namely a concrete electric pole whose longitudinally stressed reinforcement is ordinary reinforcement, with a single-piece weight of about 1887 kg, mainly composed of cement, sand and gravel, reinforcement and release agent, etc., manufactured through processes such as raw material preparation, reinforcement straightening and cutting, reinforcement cage fabrication, mould casting, centrifugal forming, steam curing and finished-product demoulding. The key upstream raw materials of this product are cement, sand and gravel, reinforcement and release agent, etc., and the downstream is mainly applied to the support of power lines of 35 kV and below, supporting transmission lines through fastening fittings such as cross arms. As for the system boundary, infrastructure such as the manufacture of production equipment and plant construction is not included within the dataset boundary. In terms of data sources and data processing, the data inventory is formed by merging data from multiple sources, and energy such as electricity is calculated using China's average energy mix.
Activity Description
The system boundary is the concrete rod from the cradle-to-gate, the starting point is the input of raw materials, and the end point is the finished concrete rod leaving the factory. The main stages include raw material preparation (cement, sand and gravel, etc.), steel bar straightening and cutting (steel bars, etc.), steel bar skeleton production, mold pouring, centrifugal molding, steam curing and finished product demoulding (release agent, etc.).
Process Description
Concrete poles, also called reinforced concrete poles, refer to concrete poles whose longitudinal stress-bearing steel bars are ordinary steel bars. They are manufactured using a centrifugal molding process and are mainly used to support power lines of 35 kV and below. Concrete poles are mainly made from cement, sand, gravel, steel bars and release agents through processes such as raw material preparation, steel straightening and cutting, steel frame making, mold pouring, centrifugal molding, steam curing and finished product demoulding. The pole structure is longitudinally stretched and steam cured by a steel wire frame. It has high crack resistance and good durability. It is in the form of a rod-shaped concrete structure, and the transmission lines are supported by fastening accessories such as cross arms.
Time period
2022
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Concrete pole production mainly includes raw material preparation, steel bar straightening and cutting, steel reinforcement cage fabrication, concrete pouring into molds, centrifugal molding, steam curing, and finished product demolding. After straightening to a specified length, the steel bars are welded into a cage, which is then placed into a steel mold, and a measured amount of mixed concrete is poured in. After the mold is closed, the centrifuge rotates at high speed to compact the concrete against the mold wall. The entire mold is then transferred to a steam curing kiln for temperature rise and constant-humidity curing. Once the required strength is achieved, the finished concrete pole is demolded.