Rapid Hardening Cement
Rapid Hardening Cement
(OP)
Is rapid hardening cement allowed to be used in the construction of piers supporting bridges????????
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RE: Rapid Hardening Cement
RE: Rapid Hardening Cement
RE: Rapid Hardening Cement
RE: Rapid Hardening Cement
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RE: Rapid Hardening Cement
I am thinking whether I can use high strength concrete instead of rapid a concrete made of rapid hardening cement because rapid hardening cement may "posses" some durability problem in long term. If I use say a 60 MPa cube strength OPC concrete, which can achieve compressive strength of at least 30 MPa at 7 days, and strip off the formwork after 8 days the concrete has been placed. What precautious measures or special curing method should be taken if the bridge pier is going to be subjected to a full railway live load from the bridge superstructure after 8 days the concrete has been cast??
RE: Rapid Hardening Cement
RE: Rapid Hardening Cement
How you get to that point should be decided with the benefit of a materials engineer experienced in mix designs and admixtures and the structural engineer.
Regards,

Qshake
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
RE: Rapid Hardening Cement
Whatever method of construction is chosen, the tracks and carriageways should be reopened to traffic after the 9-day closure.
My stupid idea is demolish the arch, fix the bars for the “new 1.9m tall dwarf walls” over the pier and abutments and place concrete as quick as possible on the first two days………..
Any better ideas???????
RE: Rapid Hardening Cement
To connect the base of the steel column, I will drill some holes in which bars are inserted and chemical grout (e.g HILTI) is injected into the gaps between the bars and the holes. At last, the base plate is fastened to the pier and abutments................
Does it sound less stupid :)
RE: Rapid Hardening Cement