Assessment on in-situ application of high strength antiwashout underwater concrete

Title: Assessment on in-situ application of high strength antiwashout underwater concrete
Author(s): H.-Y. Moon, Y.-K. Song, K.-J. Shin
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 875 - 883
Total Pages: 9
Nb references: 8
Language: English

Abstract: 
The construction of underwater structures has been increased, but underwater concrete has some problems of quality deterioration and water contamination around cast-in-situ of construction. In this paper assessment on application for in-situ of antiwashout underwater concrete (AWC) that is manufactured for the purpose of not only decreasing suspended solids, pH but also increasing long-term strength of concrete with granulated ground blast furnace slag (BFS) was studied. In the case of mock-up test(I), when AWC whose slump flow was 58cm, was placed in the mock-up test at a speed of 24m3/hr, it took about a minute to flow to the side wall, and the surface was maintained at horizontal level. Compressive strength of the cored specimen in each section was higher than the specified compressive strength of 23.6 Mpa. In the case of mock-up test(II), pH value and suspended solids of high strength AWC were 10.0~11.0 and 51 mg/l at 30 minutes later, initial and final setting time were about 30, 37 hours, and the slump flow was 53±2cm. In the placement at a speed of 27 m3/hr, there was no large difference in flowing velocity, with or without reinforcing bar and flowing slope was maintained at horizontal level. Compressive strength and elastic modulus of the cored specimen somewhat decreased as flowing distance was far; however, those of central area showed the highest value.

Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00