Fresh Stability and In-Situ Hardened Uniformity of SCC

Author(s): Samuel D. Keske, Anton K. Schindler, Robert W. Barnes
Paper category: Conference
Book Title: 8th International RILEM Symposium on Self-Compacting Concrete - SCC 2016
Editor: Kamal H. Khayat
ISBN: 978-2-35158-156-8
e-ISBN: 978-2-35158-157-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 103-112
Total Pages: 10
Language: English

Abstract: Test methods to assess the fresh concrete stability of self-consolidating concrete (SCC) and the relationship between these tests and various in-situ hardened concrete uniformity test results are presented. Recommendations regarding SCC stability test methods are provided, as well as lessons learned regarding various measures of hardened concrete uniformity. Twenty SCC mixtures and four vibrated concretes were produced and large-scale wall elements were cast to assess the in-situ uniformity.

The visual stability index (VSI) correlates well with quantitative measures of fresh concrete stability and several measures of in-situ hardened concrete uniformity. Therefore, the VSI is the most accurate fresh concrete stability test studied and is valuable in determining SCC stability despite its subjective nature. The sieve stability test is quantitative in nature and correlates well with measures of fresh concrete stability and in-situ hardened concrete uniformity. However, the sieve stability test results are affected by coarse aggregate size. The use of the sieve stability test with an abbreviated 80-second rest period is recommended based on correlation of results to results obtained after the standard 15-minute rest period. The abbreviated sieve stability test should be used alongside the VSI for accelerated job-site quality assurance testing.

Online publication: 2016
Publication Type: full_text
Public price (Euros): 0.00