Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental investigation of the short-term creep recovery of hardened cement paste at micrometre length scale
Abstract This paper presents an experimental investigation on the short-term creep recovery of cement paste at micrometre length scale. Micro-cantilever beams were fabricated and tested with 8 different loading series using the nanoindenter. It is found that cement pastes show high recovery ratios (>80%) even subjected to very high stress levels. Relatively lower recovery ratios and non-linear creep were also observed for w/c 0.4 samples under high stress levels. A good agreement is found between the results predicted using the linear superposition principle and the experimental results except for the measured non-linear creep in w/c 0.4 samples. It is suggested that the short-term creep recovery may be associated with the microscale stress redistribution or the reversible internal water movement. The observed non-linear creep under the highest stress level may be due to the higher density of microcracks generated during the loading stage, which may further promote the water transfer.
Experimental investigation of the short-term creep recovery of hardened cement paste at micrometre length scale
Abstract This paper presents an experimental investigation on the short-term creep recovery of cement paste at micrometre length scale. Micro-cantilever beams were fabricated and tested with 8 different loading series using the nanoindenter. It is found that cement pastes show high recovery ratios (>80%) even subjected to very high stress levels. Relatively lower recovery ratios and non-linear creep were also observed for w/c 0.4 samples under high stress levels. A good agreement is found between the results predicted using the linear superposition principle and the experimental results except for the measured non-linear creep in w/c 0.4 samples. It is suggested that the short-term creep recovery may be associated with the microscale stress redistribution or the reversible internal water movement. The observed non-linear creep under the highest stress level may be due to the higher density of microcracks generated during the loading stage, which may further promote the water transfer.
Experimental investigation of the short-term creep recovery of hardened cement paste at micrometre length scale
Gan, Yidong (Autor:in) / Vandamme, Matthieu (Autor:in) / Chen, Yu (Autor:in) / Schlangen, Erik (Autor:in) / van Breugel, Klaas (Autor:in) / Šavija, Branko (Autor:in)
31.07.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Activation energy of creep of hardened cement paste
| Springer Verlag | 1969
Short-term creep of cement paste during nanoindentation
| Elsevier | 2010