Self Compacting Concrete Actual status in Europe Self Compacting Concrete Actual status in Europe

50 Pages·2009·3.34 MB·English

European Federation of Concrete Admixture Associations
Self Compacting Concrete
Self Compacting Concrete
Actual status
Actual status
(and future development)
(and future development)
in Europe
in Europe
Dr. Bert Kilanowski
Chairman of EFCA-Technical Committee
1
Self Compacting Concrete (SCC)
is an advanced structural material
gives improved finish and appearance
allows for improved placing methods
provides significant safety benefits
offers new design opportunities
reduces manual handling
So, why is SCC not widely used … ?
2
Consistence in Readymix Concrete [%]
80
70
60
50
40
30
20
10
0
2000* 2001* 2002* 2003 2004
S1 (10 -40 mm)
S2 -S3 (50 -150 mm)
S4 -S5+ (160 ->220 mm)
source:ERMCO statistics 2000 -2004
3
SCC (*) Only a limited number of countries
contributed to the statistics 2000 -2002
SCC in Readymix Concrete [%]
25%
25
20
15
10
5% 5%
5
2%
1%
0

* m c k d e * d l * s * d l a * n d y K O a *
Austria Belgiu Republi enmar Finlan Franc ermany Irelan Israe Italy erland Norway Polan Portuga Slovaki Spain Swede tzerlan Turke U ERMC Russi USA
h D G th wi r.
c e S e
e N v
z A
C
4
source:ERMCO statistics 2004
data are partly(*) revised
Cement sales to Readymix Concrete [%]
90
80
70
60
50 2002
2003
40 2004
30
20
10
0
a m c k d e y d l y s y d l a n n d y K O a A
Austri Belgiu h Republi Denmar Finlan Franc German Irelan Israe Ital therland Norwa Polan Portuga Slovaki Spai Swede witzerlan Turke U r. ERMC Russi US
c e S e
e N v
z A
C
5
source: ERMCO statistics 2004
SCC in Precast Concrete more common !?
some estimations
Italy appr. 30 %
Netherlands appr. 30 %
Spain 25 - 30 %
… others …
US 10 - 40 %
6
RM vs. Precast -Where are the differences?
7
SCC - Specific Properties
SCC has specific fresh properties different from normal
concrete. These properties need to be additionally defined
and controlled.
covered by EN 206-1
Slump flow S5(+) or F6(+)
Viscosity
Passing ability
Segregation resistance
EN 206 can not be used for SCC on site where the
purchaser must specify the fresh properties of SCC.
It was this that lead to a European industry
initiative to produce new SCC Guidelines.
8
The European Guideline for SCC
ERMCO
Concrete
Precast
Admixtures Ready-mix
Concrete
Concrete
Products
Special
Cement
Concretes
Equipment
manufacturers
and
Contractors
“TESTING-SCC”
9
Why European Guidelines for SCC?
Concrete purchasers need
confidence in the Engineering properties
a Specification against which to purchase
Users need advise
on formwork and site preparation
on acceptance criteria, placing and finishing
The European Concrete Industry needs
harmonised specifications
harmonised test methods
10