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Performance-based procedure for the definition of controlled low-strength mixtures

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journal contribution
posted on 20.03.2018 by Pablo Pujadas, Ana Blanco-Alvarez, Sergio Pialarissi-Cavalaro, Antonio Aguado
Controlled low-strength material (CLSM) is a self-consolidating cementitious material used as backfill in narrow trenches. The high content of aggregates and water in CLSM leads to a special behavior that is closer to soil than concrete. Consequently, mixture proportioning methodologies for conventional concrete do not apply to CLSM. The objective of this paper is to propose a new methodology to achieve the optimal composition that fulfills the flowability and compressive strength requirements of the material. Instead of computing the aggregate or the cement separately, all solid particles in the mixture are considered concurrently to estimate the water content in terms of water-to-solid ratio (W/S). In this way, the compressive strength can be modified without compromising the desired flowability. An example application is presented and an experimental program is conducted to validate this philosophy. The results confirm that the methodology proposed provides compositions that satisfy the main requirements of CLSM, thus representing a contribution to the use of more economical and adequate materials.

Funding

The authors thank the Gas Natural Fenosa company for its financial support. The first author acknowledges the grant PDJ provided Departament d’Universitats, Recerca i Societat de la Informacio de la Generalitat de Catalunya.

History

School

  • Architecture, Building and Civil Engineering

Published in

Journal of Materials in Civil Engineering

Volume

27

Issue

11

Citation

PUJADAS, P. ... et al, 2015. Performance-based procedure for the definition of controlled low-strength mixtures. Journal of Materials in Civil Engineering, 27 (11), 06015003.

Publisher

© American Society of Civil Engineers (ASCE)

Version

AM (Accepted Manuscript)

Publication date

2015

Notes

This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://ascelibrary.org/doi/10.1061/(ASCE)MT.1943-5533.0001283.

ISSN

0899-1561

Language

en

Exports