Static yield stress measurements of fine aggregates

Publikation: Beitrag in FachzeitschriftKonferenzartikelBeigetragenBegutachtung

Beitragende

  • Ludwig Hertwig - , Hochschule für Technik, Wirtschaft und Kultur Leipzig (HTWK) (Autor:in)
  • Klaus Holschemacher - , Hochschule für Technik, Wirtschaft und Kultur Leipzig (HTWK) (Autor:in)
  • Viktor Mechtcherine - , Professur für Baustoffe (Autor:in)

Abstract

Fine grained concrete with a maximum grain size of D = 2 mm can be designed as high-performance concrete with outstanding properties. Typical applications are 3D-printing, grouts, textile-reinforced concrete and thin high-performance structures. Studies reported in the literature that with decreasing grain size the impact of the granulometric properties of the aggregates is increasing. These properties are not only influencing the water demand but also the rheological behavior, such as the static yield stress. In order to investigate and quantify the effects of granulometry on static yield stress measurements six different sands of three deposits within the range of d/D = 0/2 mm and industrial made glass spheres were tested. The granulometric properties of the materials have been investigated using digital image analyzing. The measurement device was a rotational viscosimeter (Viskomat NT) equipped with a Vane-paddle. Factors as the sample preparation (compaction) and applied shear rate under a constant shear rate protocol (CSR) were analyzed. An optimum measurement procedure for the grain mixtures was found in using 0.2 rpm and a layer-wise static compaction. The analysis showed the importance of the grain size distribution of comparable grain mixtures regarding the static yield torque.

Details

OriginalspracheEnglisch
Seiten (von - bis)MAT-31-1-MAT-31-6
Seitenumfang6
FachzeitschriftProceedings of International Structural Engineering and Construction
Jahrgang9
Ausgabenummer1
PublikationsstatusVeröffentlicht - 2022
Peer-Review-StatusJa

Konferenz

Titel4th European and Mediterranean Structural Engineering and Construction Conference
UntertitelState-of-the-art Materials and Techniques in Structural Engineering and Construction
KurztitelEURO MED SEC 4
Veranstaltungsnummer4
Dauer20 - 25 Juni 2022
BekanntheitsgradInternationale Veranstaltung
OrtHochschule für Technik, Wirtschaft und Kultur Leipzig & online
StadtLeipzig
LandDeutschland

Schlagworte

Forschungsprofillinien der TU Dresden

DFG-Fachsystematik nach Fachkollegium

Fächergruppen, Lehr- und Forschungsbereiche, Fachgebiete nach Destatis

Ziele für nachhaltige Entwicklung

ASJC Scopus Sachgebiete

Schlagwörter

  • Digital image analyzing, Fine-grained concrete, Granulometry, High performance concrete, Particle shape, Rheology, Static yield torque

Bibliotheksschlagworte