Filling ability and plastic settlement of self-compacting concrete

Title: Filling ability and plastic settlement of self-compacting concrete
Author(s): M. Sonebi, P. J. M. Bartos
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 252
Issue date: 2002-10-01
Publication year: 2002
Pages: 462 - 469
Total Pages: 8
Nb references: 16
Language: English

Abstract: The use of self-compacting concrete (SCC) facilitates the placing of concrete by eliminating the need for compaction by vibration.
Given the highly flowable nature of such concrete, care is required to ensure excellent filling ability and adequate stability.
This is especially important in deep structural members and wall elements where concrete can block the f low, segregate and exhibit bleeding and settlement which can result in local defects that can reduce mechanical properties, durability and quality of surface finish.
This paper shows results of an investigation of fresh properties of self-compacting concrete, such as filling ability measured by slump f low and f low time (measured by Orimet) and plastic fresh settlement measured in a column.
The SCC mixes incorporated various combinations of fine inorganic powders and admixtures.
The slump flow of all SCCs was greater than 580 mm and the time in which the slumping concrete reached 500 mm was less than 3 s.
The flow time was less than 5 s.
The results on SCCs were compared to a control mix.
The compressive strength and splitting tensile strength of SCCs were also measured.
The effects of water/powder ratio, slump and nature of the sand on the fresh settlement were also evaluated.
The volume of coarse aggregate and the dosage of superplasticizer were kept constant.
It can be concluded that the settlement of fresh self-compacting concrete increased with the increase in water/powder ratio and slump.
The nature of sand influenced the maximum settlement.

Online publication: 2002-08-17
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/12607