TY - GEN
T1 - First principles-based design of economical ultra-high performance concrete
AU - Arora, A.
AU - Aguayo, M.
AU - Kianmofrad, F.
AU - Yao, Y.
AU - Mobasher, B.
AU - Neithalath, N.
N1 - Funding Information:
The authors sincerely acknowledge the Arizona Department of Transportation (ADOT) for funding this research (Grant no: SPR 745). The materials used for this study were provided by BASF Corporation, Salt River Materials Group, Holcim Cement, Burgess Pigments, and Omya A.G., and their contributions are acknowledged. This research was conducted in the Laboratory for the Science of Sustainable Infrastructural Materials at Arizona State University and the support that has made this laboratory possible is acknowledged. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of the funding agency, nor do the contents constitute a standard, specification, or a regulation.
Publisher Copyright:
© ICDCS 2018. All rights reserved.
PY - 2018
Y1 - 2018
N2 - This paper presents a novel strategy to design the binder phase of ultra-high performance concrete (UHPC) from commonly available cement replacement (fly ash, slag, microsilica, metakaolin) and fine filler (limestone) materials. A packing algorithm is used to extract the number density, mean centroidal distance, and coordination number of the microstructure. Similarly, rheological studies on the pastes provide yield stress, plastic viscosity, and mini-slump spread. The selection criteria involves using the three microstructural and three rheological parameters individually or in combination to define packing and flow coefficients. The selection criteria is flexible enough to allow users modify the constraints depending on the application. The binder with the desired packing and rheological features is combined with aggregate sizes and amounts chosen from a compressible packing model based on maximum packing density. A fiber volume fraction of 1% is also used, along with accommodations for wall and loosening effects. The model is programmed in a user-friendly environment to enable engineers select aggregates from locally available materials. Compressive strengths greater than 150 MPa are obtained for the selected UHPC mixtures after 28 days of moist curing. The strength-normalized cost of such mixtures is only a fraction of that of proprietary UHPCs.
AB - This paper presents a novel strategy to design the binder phase of ultra-high performance concrete (UHPC) from commonly available cement replacement (fly ash, slag, microsilica, metakaolin) and fine filler (limestone) materials. A packing algorithm is used to extract the number density, mean centroidal distance, and coordination number of the microstructure. Similarly, rheological studies on the pastes provide yield stress, plastic viscosity, and mini-slump spread. The selection criteria involves using the three microstructural and three rheological parameters individually or in combination to define packing and flow coefficients. The selection criteria is flexible enough to allow users modify the constraints depending on the application. The binder with the desired packing and rheological features is combined with aggregate sizes and amounts chosen from a compressible packing model based on maximum packing density. A fiber volume fraction of 1% is also used, along with accommodations for wall and loosening effects. The model is programmed in a user-friendly environment to enable engineers select aggregates from locally available materials. Compressive strengths greater than 150 MPa are obtained for the selected UHPC mixtures after 28 days of moist curing. The strength-normalized cost of such mixtures is only a fraction of that of proprietary UHPCs.
KW - Compressive strength
KW - Durability
KW - Microstructure
KW - Particle packing
KW - Rheology
KW - Ultra high-performance concrete
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M3 - Conference contribution
AN - SCOPUS:85079094186
T3 - 6th International Conference on Durability of Concrete Structures, ICDCS 2018
SP - 877
EP - 889
BT - 6th International Conference on Durability of Concrete Structures, ICDCS 2018
A2 - Basheer, P. A. Muhammed
PB - Whittles Publishing Limited
T2 - 6th International Conference on Durability of Concrete Structures, ICDCS 2018
Y2 - 18 July 2018 through 20 July 2018
ER -