UNDERWATER CONCRETING USING SELF-COMPACTING GROUT WITH TWO STAGE CONCRETE
The pouring of underwater concrete is considered as challenge for engineers even during the design or during implementation and supervision, due to the fact that many precautions must be taken for the success of casting process. The most important precaution is to protect the fresh concrete during the casting process from the water until the completion of the pouring of concrete and the concrete harden, so as to avoid the risk of washout of cement past and segregation of aggregates. Concrete can be placed underwater successfully though good design of concrete mix, and through choosing the most suitable method for placing of concrete underwater. There are wide ranges of methods for underwater concreting including traditional methods such as tremie method and pumping method, there are also some new and non common methods such as grouted aggregate which is known as two-stage concrete method. Two-stage concrete is considered as one of modem techniques in the concreting industry. The two-stage concrete or pre-placed aggregate method, as the name implies, consists of filling a form with aggregate and then injecting a grout to fill the voids through pumping tubes extended to the bottom of the form. The main objective of the research is to present a study for the capability of preparation and execution of pouring the concrete underwater by using two-stage concrete method.
Underwater concrete Two stage concrete Grout Coarse aggregate
HAKIM.S.ABDELGADER ALI.S.EL-BADEN Aboujeila M.Othman
Civil Engineering Department, A1-Fateh University, Tripoli-Libya
国际会议
长沙
英文
745-754
2009-06-05（万方平台首次上网日期，不代表论文的发表时间）