Title:
Production of Sustainable Concrete Materials through Innovative Uses of CO2
Author(s):
Caijun Shi, Bao Lu, Zhenjun Tu, and Xiaoying Pan
Publication:
Symposium Paper
Volume:
326
Issue:
Appears on pages(s):
119.1-119.10
Keywords:
CO2 treatment; mechanical properties; shrinkage; durability; recycled aggregate concrete
DOI:
10.14359/51711102
Date:
8/10/2018
Abstract:
This presentation discusses the innovative uses of CO2 for the curing of concrete products, surface treatment of concrete and performance enhancement of recycled concrete aggregates (RCA). Using carbon dioxide for concrete curing is based on the chemical reactions between CO2 and the main silicate phases in the presence of water. This technology allows several advantages over traditional moisture curing in terms of decreasing the duration time of early curing and improving the mechanical properties and dimensional stability of concrete.
Concrete surface treatment is one of the effective protection methods to improve the durability of concrete. CO2 treatment produced a carbonated layer, but increased the compressive strength, and effectively reduced the water permeability, water-vapor transmission and chloride migration.
The cement paste attached on natural aggregates has a significant effect on the quality of RCA because it usually has higher porosity and lower strength than natural aggregates. This work attempted to improve the quality of RCAs through carbonation treatment. Carbonation increased the density and decreased the water absorption and crushing values of the RCA. Compared with the mortars made of uncarbonated RCAs, the mortars made with carbonated RCAs increased autogenous shrinkage, reduced drying shrinkage, water absorption, and chloride migration.
Related References:
1. Ward, H.C., “Effects of urban density on carbon dioxide exchanges: Observations of dense urban, suburban and woodland areas of southern England,” Environment Pollution, V. 198, 2015, pp. 186-200.
2. Kordowski, K., “Carbon dioxide fluxes over an urban park area,” Atmos Environ, V.44, 2010, pp.2722-2730.
3. Herzog, H. J., “What future for carbon capture and sequestration,” Environmental Science & Technology, V. 35, 2001, pp. 148–153.
4. Worrell, E., and Price, L., “Carbon dioxide emissions from the global cement industry,” Annual Review of Energy & the Environment, V. 26, 2001, pp. 303–329.
5. Scrivener, K.L., and Kirkpatrick, R.J., “Innovation in use and research on cementitious material,” Cement and Concrete Research, V. 38, 2008, pp. 128–136.
6. Berger, R.L., and Klemm, W., “Accelerated curing of cementitious systems by carbon dioxide: part II. Hydraulic calcium silicates and aluminates, Cement and Concrete Research, V. 2, No, 6, 1972, pp. 647–652.
7. Shi, C., and Wang, D., “Weathering properties of CO2-cured concrete blocks,” Resources, Conservation and Recycling, V. 65, 2012, pp. 11-17.
8. He, P., and Shi, C., “Effect of further water curing on compressive strength and microstructure of CO2-cured concrete,” Cement and Concrete Composites, V. 72, 2016, pp. 80-88.
9. Berger, R., and Young, J., “Acceleration of hydration of calcium silicates by carbon dioxide treatment,” Nature, V. 240, No, 97, 1972, pp. 16–18. 10. Maroto, M. M., “Developments and Innovation in Carbon Dioxide (Co2) Capture and Storage Technology,” CRC Press, 2010.
11. Monkman, S., and Shao, Y., “Integration of carbon sequestration into curing process of precast concrete,” Canadian Journal of Earth Sciences, V. 37, 2010, pp. 302–310.
12. Shao, Y., and Lin, X., “Early-age carbonation curing of concrete using recovered CO2,” Concrete International, V. 33, No. 9, 2011, pp. 50–56.
13. Goto, S., and Suenaga, K., “Fukuhara, Calcium silicate carbonation products,” Journal of the American Ceramic Society, V. 78, 1995, pp. 2867–2872.
14. Morandeau, A., and Thiéry, M., “Investigation of the carbonation mechanism of CH and C-S-H in terms of kinetics, microstructure changes and moisture properties,” Cement and Concrete Research, V. 56, 2014, pp. 153–170.
15. Zhang, D., Shao, Y., “Effect of early carbonation curing on chloride penetration and weathering carbonation in concrete,” Construction and Building Materials, V. 123, 2016, pp. 516–526.
16. Shi, C., and Li, Y., “Performance enhancement of recycled concrete aggregate – A review,” Journal of Cleaner Production, V. 112, 2016, pp. 466-472.
17. Thiery, M., and Villain, G., “Investigation of the carbonation front shape on cementitious materials: effects of the chemical kinetics,” Cement and Concrete. Research, V. 37, No. 7, pp. 1047-1058.
18. Kou, S., and Poon, C., “Properties of concrete prepared with PVA-impregnated recycled concrete aggregates,” Cement and Concrete Composites, V. 32, No. 8, 2010, pp. 649–654.
19. Shi, C., and He, F., “Effect of pre-conditioning on CO2 curing of lightweight concrete blocks mixtures,” Construction and Building Materials, V. 26, No. 1, 2012, pp. 257-267.
20. Pan, X., and Shi, C., “Effects of CO2 surface treatment on strength and permeability of one-day-aged cement mortar,” Construction and Building Materials, V. 154, 2017, pp. 1087-1095.
21. De Muynck, W., and De Belie, N., “Microbial carbonate precipitation in construction materials: a Review,” Ecological Engineering, V. 36, No. 2, 2010, pp. 118-136.
22. Faatz, M., and Gröhn, F., “Mineralization of calcium carbonate by controlled release of carbonate in aqueous solution,” Materials Science & Engineering C, V. 25, No. 2, 2005, pp. 153-159.
23. Zhang, J., and Shi, C., “Influence of carbonated recycled concrete aggregate on properties of cement mortar,” Construction and Building Materials, V. 98, 2015, pp. 1-7.
24. Song, H., and Lee, C., “Factors influencing chloride transport in concrete structures exposed to marine environments,” Cement and Concrete Composites, V. 30, No. 2, 2008, pp. 113–121.