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Accelerated leaching of cementitious materials using ammonium nitrate (6M): influence of test conditions

Stéphane Poyet 1 Patrick Le Bescop 1 Magalie Pierre 1 Laure Chomat 1 Cécile Blanc 2
1 LECBA - Laboratoire d'Etude du Comportement des Bétons et des Argiles
SECR - Service d'Etudes du Comportement des Radionucléides : DEN/DPC
2 LISL - laboratoire d'ingénierie des surfaces et lasers
SEARS - Service d'études analytiques et de réactivité des surfaces : DEN/DPC/SEARS
Abstract : We have focused on the test conditions influence on accelerated degradation of cementitious materials using ammonium nitrate. PH-buffering and renewal of the leaching solution were studied. PH-buffering appeared not to be very important when the renewal pH remains under eight. Renewal appeared to be the most influential feature. Its absence leads to calcium accumulation in the leaching solution inducing aggressiveness fall. Degradation is then less marked in terms of depth, flux and mineralogy. The resulting porosity increase is also smaller.
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https://hal-cea.archives-ouvertes.fr/cea-03293603
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Submitted on : Wednesday, July 21, 2021 - 10:37:23 AM
Last modification on : Friday, July 23, 2021 - 3:47:00 AM
Long-term archiving on: : Friday, October 22, 2021 - 6:25:48 PM

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EJECE 16(3-4) 336-351.pdf
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Stéphane Poyet, Patrick Le Bescop, Magalie Pierre, Laure Chomat, Cécile Blanc. Accelerated leaching of cementitious materials using ammonium nitrate (6M): influence of test conditions. European Journal of Environmental and Civil Engineering, Taylor & Francis, 2015, 16, pp.336 - 351. ⟨10.1080/19648189.2012.667712⟩. ⟨cea-03293603⟩

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