Title:
Early-Age Shrinkage Of Cement Paste Containing Humic Substances as that from River Dredging Sediments in France
Author(s):
Hamza Beddaa, Amor Ben Fraj, Francis Lavergne and Jean Michel Torrenti
Publication:
Symposium Paper
Volume:
349
Issue:
Appears on pages(s):
23-39
Keywords:
autogenous shrinkage, chemical shrinkage, dredging sediments, humic substances
DOI:
10.14359/51732736
Date:
4/22/2021
Abstract:
Dredged river sediments can be considered as a promising alternative for conventional aggregates in concrete. However, the effect of sediments’ properties and particularly their organic matter (OM) content on those of the concrete have to be assessed. Indeed, the organic weight fraction of organic matter in sandy sediments dredged in the Seine watershed is highly variable as it varies from 0 wt% to 10 wt% of the dry matter. This research aims at assessing the effects of humic substances (HS) on the early age behavior of a cement paste. HS are organic compounds resulting from the chemical, physical and microbiological transformation of animals and plants residues and which are also the most representative component of sediments organic matter. A soluble HS, potassium humate, is added as partial substitution of cement; 0.2 wt%, 0.5 wt% and 1 wt%. The results indicate that HS causes a delay of both chemical and autogenous shrinkages by retarding the hydration process. In addition, the chemical shrinkage amplitude is not significantly affected by the presence of HS in the mixture, while the autogenous shrinkage is decreased especially for the high w/b (water/binder; binder=cement+HS) ratios, due to bleeding. Furthermore, for high rates (2% and 3%), this bleeding could generate a delay of setting between the top and the bottom of the sample causing cracks due to a restrained shrinkage in the upper part of the sample.
Related References:
1. DTBS, “Report on dredging operations for the year 2015” (in French). URL: http://www.bassindelaseine.vnf.fr/IMG/pdf/Bilan_Operation_de_dragage_2015_annexes.pdf
2. DTBS, “Report on dredging operations for the year 2016” (in French). URL: http://www.bassindelaseine.vnf.fr/IMG/pdf/bilan_operation_de_dragage_2016_avec_annexes.pdf
3. DTBS, “Report on dredging operations for the year 2017” (in French). URL: http://www.bassindelaseine.vnf.fr/IMG/pdf/20180424_bilan_operation_de_dragage_2017_avec_annexes.pdf
4. Ben Fraj, A., Miraoui, M., Boinski, F., and Mounanga, P., “Early age and durability properties of dredged marine sand mortars”; American Concrete Institute, ACI Special Publication V.289, 2012, pp. 437-451.
5. Aouad, G., Laboudigue, A., Gineys, N., and Abriak, N., “Dredged sediments used as novel supply of raw material to produce portland cement clinker”; Cement and Concrete Composites V.34, No 6, 2012, pp. 788- URL: http://www.sciencedirect.com/science/article/pii/S0958946512000352 doi:10.1016/j.cemconcomp.2012.02.008
6. Limeira, J., Etxeberria, M., Agullo, L., and Molina, D., “Mechanical and durability properties of concrete made with dredged marine sand”; Construction and Building Materials V.25, No 11, 2011, pp. 4165-4174. URL: http://www.sciencedirect.com/science/article/pii/S0950061811001930 doi: 10.1016/j.conbuildmat.2011.04.053
7. Wang, L., Chen, L., Tsang, D. C., Li, J.-S., Baek, K., Hou, D., Ding, S., and Poon, C.-S., “Recycling dredged sediment into fill materials, partition blocks, and paving blocks: Technical and economic assessment”; Journal of Cleaner Production, V. 199, 2018, pp. 69-76. URL: http://www.sciencedirect.com/science/article/pii/S0959652618321541 doi: 10.1016/j.jclepro.2018. 07.165
8. Beddaa, H., Ben Fraj, A., Lavergne, F., and Torrenti, J.-M., “Effect of potassium humate as humic substances from river sediments on the rheology, the hydration and the strength development of a cement paste”; Cement and Concrete Composites. URL
http://www.sciencedirect.com/science/article/pii/S0958946518311508 doi: 10.1016/j.cemconcomp.2019.103400
9. Chen, H., and Wang, Q., “The behaviour of organic matter in the process of soft soil stabilization using cement”; Bulletin of Engineering Geology and the Environment V. 65, No. 4, 2006, pp. 445-448. URL 10.1007/s10064-005-0030-1 doi: 10.1007/s10064-005-0030-1
10. Kononova, M., “Chapter 1 - the main stages in the history of soil humus study, in: Soil Organic Matter”; second edition Edition, Pergamon, 1966, pp. 13- 45. URL http://www.sciencedirect.com/science/article/pii/B9780080114705500046 doi: 10.1016/B978-0-08-011470-5.50004-6
11. Maclean, D., and Sherwood, P., “Study of the occurrence and effects of organic matter in relation to the stabilization of soils with cement”; 1962.
12. Harvey, O., Harris, J., Herbert, B., Stiffler, E., and Haney, S., “Natural organic matter and the formation of calcium-silicate-hydrates in lime-stabilized smectites: A thermal analysis study”; Thermochimica Acta 505 1, 2010, pp. 106-113. URL http://www.sciencedirect.com/science/article/pii/S0040603110001346 doi: 10.1016/j.tca.2010.04.007
13. Bertelsen, I., Kragh, C., Cardinaud, G., Ottosen, L., and Fischer, G., “Quantification of plastic shrinkage cracking in mortars using digital image correlation”; Cement and Concrete Research V. 123, 2019, pp. 105761. URL http://www.sciencedirect.com/science/article/pii/S0008884618303697 doi: 10.1016/j.cemconres.2019.05.006
14. Tazawa, E., and Miyazawa, S., “Influence of constituents and composition on autogenous shrinkage of cementitious materials”; Magazine of Concrete Research V. 49, No 178, 1997, pp. 15-22. doi: 10.1680/macr.1997.49.178.15