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Early-Age Thermal-Shrinkage Cracking in Deep Foundations

Open Access
|Dec 2021

Figures & Tables

Figure 1

Thermal cracking development in time (Bamforth, 2007, 2018).
Thermal cracking development in time (Bamforth, 2007, 2018).

Figure 2

Hydration heat development for selected types of cement (LCPC, 2007).
Hydration heat development for selected types of cement (LCPC, 2007).

Figure 3

Circular shaft in top view.
Circular shaft in top view.

Figure 4

Location of gauges in instrumented panels (Sajadi, 2020).
Location of gauges in instrumented panels (Sajadi, 2020).

Figure 5

Temperature development in time for L1.
Temperature development in time for L1.

Figure 6

Free thermal strains and measured strains in time for L1.
Free thermal strains and measured strains in time for L1.

Figure 7

Free thermal strains and measured strains in time for L2.
Free thermal strains and measured strains in time for L2.

Figure 8

Free thermal strains and measured strains in time for L4.
Free thermal strains and measured strains in time for L4.

Figure 9

Absolute values of recorded strains and free thermal strains in time for L1.
Absolute values of recorded strains and free thermal strains in time for L1.

Measurement levels_

Measurement levelDepth (m)
L124.6
L234.6
L339.6
L449.6
L564.6

Concrete properties_

ParameterValueUnit
Cement content (CEM type I, ASTM compliant)150kg/m3
Supplementary cementitious material content (GGBS)310kg/m3
Superplasticisers and retarders4.9–5.3l/m3
Density, ρ2400kg/m3
Specific heat, cp895J/(kg·K)

Important timeline events for the instrumented panel P24_

PanelEventDate, timeTime elapsed from the start of concreting (days)
P24 (instrumented)Excavation start23/01/2020, 10:45−6
Excavation end27/01/2020, 16:45−2
Concreting start29/01/2020, 08:220
Concreting end29/01/2020, 15:450
S23 (counter-clockwise side)Excavation start28/02/2020, 08:3030
Excavation end04/03/2020, 15:0035
Concreting start06/03/2020, 07:4337
Concreting end06/03/2020, 19:1037
DOI: https://doi.org/10.2478/sgem-2021-0033 | Journal eISSN: 2083-831X | Journal ISSN: 0137-6365
Language: English
Page range: 510 - 520
Submitted on: Aug 31, 2021
Accepted on: Nov 5, 2021
Published on: Dec 16, 2021
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2021 Łukasz Grabowski, Monika Mitew-Czajewska, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution 4.0 License.