PSI - Issue 37

João Custódio et al. / Procedia Structural Integrity 37 (2022) 644–651 João Custódio et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Table 1. Global laboratory testing campaign.

Determination of binder heat of hydration

Determination of concrete potential ISR reactivity

Binder

Semi-adiabatic calorimetry method

Isothermal conduction calorimetry method

CEM II/A-L 42,5 R

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

✓

CEM I 52,5 R CEM I 52,5 R CEM I 52,5 R

                      

CEM II/A-L 42,5 R CEM II/A-L 42,5 R

CEM I 52,5 R

CEM IV/A (P) 42,5 R CEM IV/A (P) 42,5 R CEM II/B-M (S-L) 42,5 R

CEM II/B-P 32,5N

             

CEM II/B-P 32,5N w/ 20 % Limestone CEM II/A-L 42,5R Belite w/ 30 % Slag CEM II/A-L 42,5R Belite w/ 20 % Limestone CEM II/B-M(S-L) 42,5R w/ 20 % Limestone

CEM II/B-V 42,5 N CEM II/B-V 42,5 N CEM II/B-V 42,5 N CEM II/B-V 42,5 N CEM II/B-V 42,5 N

CEM II/B-M(S-L) 42,5R CEM II/A-L 42,5R Belite

CEM I 52,5 R

CEM I 52,5 N SR

VLH 22,5 N  NOTATION: ✓ – the test is completed;  – the test will commence soon;  – the test will not be performed. ✓

2.1. Determination of binder heat of hydration The determination of the binder heat of hydration by semi-adiabatic calorimetry was carried out according to the standard NP EN 196-9 (IPQ, 2010), the test period was 120 hours ( i.e. , 5 days). The determination by isothermal conduction calorimetry was done according to the standard NP EN 196-11 (IPQ, 2018), with this method the test period was 168 hours ( i.e. , 7 days). 2.2. Determination of concrete potential ISR reactivity The determination of the concrete potential ISR reactivity was performed on the same concrete mixture that was applied in the deck ’s casting, as presented in section §3.2. This mixture was produced in the laboratory with the same materials used onsite, that were taken from the concrete batching plant. The determination followed the procedure defined in the LPC test method no. 66 (Pavoine and Divet, 2007). With this test the sensitivity of the concrete mixture and of the thermal cycle tested with respect to the internal sulphate reaction is measured by recording the swelling of the specimens. This test is carried out on three concrete specimens. After casted and submitted to a heat treatment, the samples undergo two cycles of drying (temperature = 38 ± 2 ° C and Relative humidity <30 %) and humidification (immersion in water at 20 ± 2 °C), followed by a final immersion in water at 20 ± 2 °C during which the measurements of swelling are carried out, at least, up to 12 months. The heat treatment applied at the test (Fig. 1) was similar to the