Title:
Investigation on Water Retention Property and Microstructure of Fresh State Cement Mortars Using 1H Low-Field NMR
Author(s):
Yanliang Ji, Zhenping Sun, and Xiaoxing Jiang
Publication:
Symposium Paper
Volume:
329
Issue:
Appears on pages(s):
19-30
Keywords:
water retention capacity; microstructure; fresh mortar; 1H Low-field NMR
DOI:
10.14359/51711200
Date:
9/24/2018
Abstract:
This paper presents important insights into the microstructure of the fresh cement based mortar and developed an original method for evaluation of water-retention capacity of the mortars based on 1H Low-field NMR. Influence parameters, such as cement types, types and amounts of water retention agents, on water-retention properties were investigated. Results showed that the water retention capacity can be clearly identified by comparing the T2 distribution before and after the traditional water-retention tests. Moreover, the paramagnetic substance may have impacts on the NMR effects of water insides the fresh mortars. The water retention property depicted by the proposed method is consistent with the conventional method (linearity up to 0.914). The results suggest that utilization of 1H Low-field NMR on water-migration mechanism is objective and accurate.
Related References:
1. Wang, P.-M., and Zhang, G.-F., “Application Research of Dry-Mix Mortar in China,” Journal of the Chinese Ceramic Society, V. 26, Feb. 2007, pp. 106-112.
2. Zhang, G.-q., “Research on the Performance of Dry-Mixed Mortar Mixed with Mineral Thickening Admixture,” Nanjing Forestry University, 2004.
3. Paiva, H.; Silva, L. M.; Labrincha, J. A.; and Ferreira, V. M., “Effects of a Water-Retaining Agent on the Rheological Behaviour of a Single-Coat Render Mortar,” Cement and Concrete Research, V. 36, No. 7, 2006, pp. 1257-1262. doi: 10.1016/j.cemconres.2006.02.018
4. Cappellari, M.; Daubresse, A.; and Chaouche, M., “Influence of Organic Thickening Admixtures on the Rheological Properties of Mortars: Relationship with Water-Retention,” Construction & Building Materials, V. 38, Jan., 2013, pp. 950-961. doi: 10.1016/j.conbuildmat.2012.09.055
5. Dvorkin, L.; Dvorkin, O.; Garnitsky, Y.; and Ribakov, Y., “Adhesive and Cohesive Properties of Glue Cement Mortars with Addition of Organic–Mineral Modifiers,” Materials & Design, V. 53, Jan., 2014, pp. 588-595. doi: 10.1016/j.matdes.2013.07.026
6. Snoeck, D.; Schaubroeck, D.; Dubruel, P.; and De Belie, N., “Effect of High Amounts of Superabsorbent Polymers and Additional Water on the Workability, Microstructure and Strength of Mortars with a Water-to-Cement Ratio of 0.50,” Construction & Building Materials, V. 72, No. 15, 2014, pp. 148-157. doi: 10.1016/j.conbuildmat.2014.09.012
7. Senff, L.; Modolo, R. C. E.; Tobaldi, D. M.; Ascenção, G.; Hotza, D.; Ferreira, V. M.; and Labrincha, J. A., “The Influence of TiO2 Nanoparticles and Poliacrilonitrile Fibers on the Rheological Behavior and Hardened Properties of Mortars,” Construction & Building Materials, V. 75, No. 30, 2015, pp. 315-330. doi: 10.1016/j.conbuildmat.2014.11.002
8. Nguyen, D. D.; Devlin, L. P.; Koshy, P.; and Sorrell, C. C., “Impact of Water-Soluble Cellulose Ethers on Polymer-Modified Mortars,” Journal of Materials Science, V. 49, No. 3, 2014, pp. 923-951. doi: 10.1007/s10853-013-7732-8
9. Pourchez, J.; Peschard, A.; Grosseau, P.; Guyonnet, R.; Guilhot, B.; and Vallée, F., “HPMC and HEMC Influence on Cement Hydration,” Cement and Concrete Research, V. 36, No. 2, 2006, pp. 288-294. doi: 10.1016/j.cemconres.2005.08.003
10. Kaci, A.; Chaouche, M.; and Andréani, P.-A., “Influence of Bentonite Clay on the Rheological Behaviour of Fresh Mortars,” Cement and Concrete Research, V. 41, No. 4, 2011, pp. 373-379. doi: 10.1016/j.cemconres.2011.01.002
11. Yahia, A.; Mantellato, S.; and Flatt, R. J., “7—Concrete Rheology: A Basis for Understanding Chemical Admixtures,” Science and Technology of Concrete Admixtures, P.-C. Aïtcin and R. J. Flatt, eds., Woodhead Publishing, 2016, pp. 97-127.
12. Patural, L.; Korb, J.-P.; Govin, A.; Grosseau, P.; Ruot, B.; and Devès, O., “Nuclear Magnetic Relaxation Dispersion Investigations of Water Retention Mechanism by Cellulose Ethers in Mortars,” Cement and Concrete Research, V. 42, No. 10, 2012, pp. 1371-1378. doi: 10.1016/j.cemconres.2012.06.002
13. Ji, Y.; Sun, Z.; Yang, X.; Li, C.; and Tang, X., “Assessment and Mechanism Study of Bleeding Process in Cement Paste by 1H Low-Field NMR,” Construction & Building Materials, V. 100, No. 15, 2015, pp. 255-261. doi: 10.1016/j.conbuildmat.2015.09.062
14. Sun, Z. P.; Pang, M.; and Yu, Y. et al., “Effect of Superplasticizer on Transverse Relaxation Time Curve of Cement Paste,” Journal of the Chinese Ceramic Society, V. 39, No. 3, 2011, pp. 537-543.
15. Yu, Y.; Sun, Z. P.; Pang, M.; and Yang, P., “Probing Development of Microstructure of Early Cement Paste using 1H Low field NMR,” Journal of Wuhan University of Technology., V. 28, No. 5, 2013, pp. 963-967. doi: 10.1007/s11595-013-0801-7
16. JGJ/T 70-2009, “Chinese Construction Industry Standards: Standards for Test Method of Basic Properties of Construction Mortar,” 2009.
17. Pop, A.; Badea, C.; and Ardelean, I., “The Effects of Different Superplasticizers and Water-to-Cement Ratios on the Hydration of Gray Cement Using T2-NMR,” Applied Magnetic Resonance, V. 44, No. 10, 2013, pp. 1223-1234. doi: 10.1007/s00723-013-0475-5
18. Valckenborg, R. M. E.; Pel, L.; Hazrati, K.; Kopinga, K.; and Marchand, J., “Pore Water Distribution in Mortar during Drying as Determined by NMR,” Materials and Structures, V. 34, No. 10, 2001, pp. 599-604. doi: 10.1007/BF02482126