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Early structure formation in concrete with water-to-cement ratio 0.2
KTH, School of Architecture and the Built Environment (ABE), Architecture.
2018 (English)In: American Concrete Institute, ACI Special Publication, American Concrete Institute , 2018, no SP 326Conference paper, Published paper (Refereed)
Abstract [en]

Synopsis: Concrete with w/c ratio of 0.2 and lower is indeed material of a new generation. Its properties significantly surpass such of regular concrete grades in large due to the absence of mixing water not actively involved in the physical-chemical processes of cement hydration. In a sense, w/c ratio of 0.2 signifies a threshold in the material science of concrete that no research did reach before 1990s. To move this realm even further, we have been aiming at producing UHPC that crosses this threshold we felt a necessity to define a basic phenomenology of such concrete hardening, especially on the early stages. Our analysis of the kinetics of the strength gain provides that this concrete gains its main physical-mechanical properties after 7 days, and its compressive strength exceeds 100 MPa (14 500 psi) already after 24 hours in normal conditions. At last, this type of UHPC is economically viable due to a relatively low content of cement (500kg/m3 (31.2 pcf)), the use of ordinary fine aggregate, and a possibility of using standard batching equipment in the production.

Place, publisher, year, edition, pages
American Concrete Institute , 2018. no SP 326
Keywords [en]
Cement hydration, Cement stone, Durability, Early stage hardening, Ettringite, Ultra-high-performance concrete, Water-cement ratio, Cements, Compressive strength, Concrete mixing, Hardening, High performance concrete, Hydration, Cement stones, Ettringites, Stage hardening, Ultra high performance concretes, Mechanical properties
National Category
Architecture
Identifiers
URN: urn:nbn:se:kth:diva-247457Scopus ID: 2-s2.0-85057606283OAI: oai:DiVA.org:kth-247457DiVA, id: diva2:1303025
Conference
2nd International Workshop on Durability and Sustainability of Concrete Structures, DSCS 2018, 6 June 2018 through 7 June 2018
Note

QC20190408

Available from: 2019-04-08 Created: 2019-04-08 Last updated: 2019-04-08Bibliographically approved

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Sitnikov, Vasily

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CiteExportLink to record
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  • apa
  • harvard1
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  • Other locale
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Output format
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  • asciidoc
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