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Experimental Study into the Mechanical Properties of Plastic Concrete: Compressive Strength Development over Time, Tensile Strength and Elastic Modulus

Alós Shepherd, David ORCID iD icon 1; Dehn, Frank 1
1 Institut für Massivbau und Baustofftechnik (IMB), Karlsruher Institut für Technologie (KIT)

Abstract:

Plastic Concrete is a low-strength (f$_{cm,28d}$≤ 1.0 MPa), low-stiffness, impervious concrete used for cut-off wall construction in earthen dams. To date, there has been no systematic study on the effect of mix design on the long-term time development of the mechanical properties (compressive strength, tensile strength, and elastic modulus) of Plastic Concrete. Therefore currently no Plastic Concrete specific constitutive law for cut-off wall design exists. The present study closes this gap. Ten Plastic Concrete mixes with two bentonite-cement ratios and three types of sodium bentonite were produced. Fresh concrete workability tests were performed for all mixes. Compressive strength tests were performed at ages 28 d, 56 d, 91 d and four years. Splitting tensile strength and elastic modulus tests were performed at 28 days. The workability results show a good linear correlation between slump and flow table tests. Plastic Concrete’s compressive strength development over time is notably slower than that of ordinary concrete, and a new time development model following fib MC 2020 is established using a fitted sC coefficient. The splitting tensile strength shows an overall good, linear correlation with compressive strength, with an approximate ratio of 0.135. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000168190
Veröffentlicht am 08.02.2024
Originalveröffentlichung
DOI: 10.1016/j.cscm.2023.e02521
Scopus
Zitationen: 12
Web of Science
Zitationen: 9
Dimensions
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Massivbau und Baustofftechnik (IMB)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2023
Sprache Englisch
Identifikator ISSN: 2214-5095
KITopen-ID: 1000168190
Erschienen in Case Studies in Construction Materials
Verlag Elsevier
Band 19
Seiten Art.-Nr.: e02521
Vorab online veröffentlicht am 02.10.2023
Schlagwörter Plastic concrete, Compressive strength, Elastic modulus, fib MC 2020, Splitting tensile strength, Time development
Nachgewiesen in Dimensions
Web of Science
Scopus
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