【Daily Discussion】Utilities - Civil Engineering - 20210515
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What measures are commonly taken to reduce prestress loss in pretensioning construction? Answer: (1) Over-tensioning reduces the prestress loss caused by steel bar relaxation ； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce the prestress loss caused by temperature differences. We welcome active participation in discussions; the system offers generous rewards for answering questions from VIP members! ! !
(1) Reducing prestress loss due to relaxation caused by excessive tensioning； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce prestress loss caused by temperature differences.
Answer: (1) Reducing prestress loss caused by relaxation due to excessive tensioning； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce prestress loss caused by temperature differences.
(1) Reducing prestress loss due to relaxation caused by excessive tensioning； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce prestress loss caused by temperature differences.
(1) Reducing prestress loss due to relaxation caused by excessive tensioning； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce prestress loss caused by temperature differences.
(1) Over-tensioning reduces prestress loss caused by steel bar relaxation； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce prestress loss caused by temperature differences.
(1) Over-tensioning reduces prestress loss caused by steel bar relaxation； (2) Use a low water-cement ratio, control the amount of cement used, select aggregates with good gradation, and compact them by vibration
(1) Reduction in prestress loss caused by relaxation due to excessive tensioning； (2) Use a low water-cement ratio, control the amount of recycled cement used, select aggregates with good gradation characteristics, and carry out vibration compaction in order to reduce prestress loss caused by concrete shrinkage and creep ； (3) Secondary heating curing is employed to reduce prestress loss caused by temperature differences.