Pre-testing of self compacting concrete with various mineral additives and admixtures

Title: Pre-testing of self compacting concrete with various mineral additives and admixtures
Author(s): K. Paulou
Paper category : conference
Book title: International RILEM Symposium on Self-Compacting Concrete
Editor(s): O. Wallevik and I. Nielsson
Print-ISBN: 2-912143-42-X
e-ISBN: 2912143713
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 442 - 445
Total Pages: 4
Nb references: 3
Language: English

Abstract: Three different mineral additives were tested in order to manufacture SCC suitable for a tunnel construction. The mineral additives where mixed with different admixtures in order to achieve best results with respect to workability. The requirements on the hardening concrete phase were:
- To achieve a concrete quality of approximately 65 MPa or W/C=0,40
- To manufacture a concrete with good salt frost resistance.
Following requirements were for the young concrete:
- A "fast" concrete with a T50 1-2 sec.
- A "slow" concrete with T50 5-8 sec.
The mineral additives that were used in this project were a blended mineral additive containing limestone filler and blast-furnace slag, limestone filler and glass filler. All the admixtures used were superplastisizers based on polycarboxylates. The properties that were examined were workability, compressive strength and salt frost resistance. The results showed that good workability could be achieved for concrete with limestone filler and with the blended limestone-blast furnace slag filler. The results for concrete with glass filler didn't give the same satisfactory. The compressive strength was at high levels for all the concrete types. Salt frost resistance became better for concrete containing blast-furnace slag and limestone than the one containing limestone filler.

Online publication: 2003-08-21
Publication type : abstract_only
Public price (Euros): 0.00