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: Concrete Science and Engineering
Abreviated Serial title: Concr. Sc. Eng.
ISSN: 1295-2826
Publisher: RILEM Publications SARL
Volume: 4
Issue: 15
Issue date: 2002-09-01
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: 2002-06-20
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00