Experimental Investigation on the Effect of Curing Condition and Admixture on Meso-Structure of Recycled Aggregate Concrete Based on X-ray CT
Source abstract
Abstract
Abstract This study addresses the meso-structure of recycled aggregate concrete with different admixture and c;uring condition. The RCA (Recycled concrete aggregate) with admixture of slag power and fly ash and curing condition of steam was casted. X-ray CT (Computed tomography) was used to obtain meso-structure of RCA, and the pore structure, aggregate, and interface traction zone were analyzed. The results show that steam curing not only increases the pore volume but also makes the pore morphology more complex, the fractal dimension increases, the proportion of spherical pores decreases, and the pores develop from spherical to flat and slender with the increase of steam curing temperature. The porosity of micron pores in recycled aggregate concrete is about 2.3%, in which the pores with aperture less than 300 μm accounts for more than 85%. The thickness of the interface area between recycled aggregate and new mortar is about 200 μm, and the crack width in recycled aggregate is about 300– 400 μm.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Recycled Aggregate Concrete Performance · Concrete and Cement Materials Research · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
Show source-provided references
1. Chandrappa, A. K., & Biligiri, K. P. (2018). Pore structure characterization of pervious concrete using X-ray microcomputed tomography. Journal of Materials in Civil Engineering, 30, 04018108. https://doi.org/10.1061/(ASCE)MT.1943-5533.000228510.1061/(ASCE)MT.1943-5533.0002285 ↗
2. de Andrade Salgado, F., & de Andrade Silva, F. (2022). Recycled aggregates from construction and demolition waste towards an application on structural concrete: A review. Journal of Building Engineering, 52, 104452. https://doi.org/10.1016/j.jobe.2022.10445210.1016/j.jobe.2022.104452 ↗
3. Gonzalez-Corominas, A., Etxeberria, M., & Poon, C. S. (2016). Influence of steam curing on the pore structures and mechanical properties of fly-ash high performance concrete prepared with recycled aggregates. Cement Concrete Composites, 71, 77–84. https://doi.org/10.1016/j.cemconcomp.2016.05.01010.1016/j.cemconcomp.2016.05.010 ↗
4. Guo, Y., Chen, X., Chen, B., Wen, R., & Wu, P. (2021). Analysis of foamed concrete pore structure of railway roadbed based on X-ray computed tomography. Construction and Building Materials, 273, 121773. https://doi.org/10.1016/j.conbuildmat.2020.12177310.1016/j.conbuildmat.2020.121773 ↗
5. Hong, C. W., Jang, H. S., & Jeong, W. K. (2006). Strength and durability properties of concretes using ground granulated blast-furnace slag according to steam curing types. Journal of Korean Institute of Research Recycling, 15, 52–59.
6. Jun, T., Yuya, S., Tatsuhiko, S., & Michio, S. (2012). Basic study on strength characteristic of fly ash concrete under steam curing. Cement Science and Concrete Technology. https://doi.org/10.14250/cement.66.35910.14250/cement.66.359 ↗
7. Kim, B. K., Lee, J. S., Lee, G. P., Chang, S. H., & Bae, G. J. (2011). Mechanical characteristics of high-performance concrete shield segment containing ground granulated blast furnace slag and their improvement by steam curing. Journal of Korean Tunnel Underground Space Association, 13, 233–242.
8. Kou, S. C., & Poon, C. S. (2008). Mechanical properties of 5-year-old concrete prepared with recycled aggregates obtained from three different sources. Magazine of Concrete Research, 60, 57–64. https://doi.org/10.1680/macr.2007.0005210.1680/macr.2007.00052 ↗
9. Lee, M. K., Kim, K. S., Lee, K. H., & Jiang, S. H. (2005a). An experimental study on the strength of recycled concrete with steam curing. Journal of Korea Institute of Building Construction, 5, 89–95. https://doi.org/10.5345/JKIC.2005.5.2.08910.5345/JKIC.2005.5.2.089 ↗
10. Lee, M. K., Kim, K. S., Lee, K. H., & Jiang, S. H. (2005b). Strength of recycled concrete with furnace slag cement under steam curing condition. Journal of Korea Concrete Institute, 17, 613–620. https://doi.org/10.4334/JKCI.2005.17.4.61310.4334/JKCI.2005.17.4.613 ↗
11. Li, M., Wang, Q., & Yang, J. (2017). Influence of steam curing method on the performance of concrete containing a large portion of mineral admixtures. Advanced Materials in Science Engineering. https://doi.org/10.1155/2017/986321910.1155/2017/9863219 ↗
12. Liu, X., Wang, C., Deng, Y., & Cao, F. (2016). Computation of fractal dimension on conductive path of conductive asphalt concrete. Construction and Building Materials, 115, 699–704. https://doi.org/10.1016/j.conbuildmat.2016.04.05110.1016/j.conbuildmat.2016.04.051 ↗
13. Ma, Z., Shen, J., Wang, C., & Wu, H. (2022). Characterization of sustainable mortar containing high-quality recycled manufactured sand crushed from recycled coarse aggregate. Cement and Concrete Composites, 132, 104629. https://doi.org/10.1016/j.cemconcomp.2022.10462910.1016/j.cemconcomp.2022.104629 ↗
14. McGinnis, M. J., Davis, M., de la Rosa, A., Brad, D. W., & Yahya, C. K. (2017). Strength and stiffness of concrete with recycled concrete aggregates. Construction and Building Materials, 154, 258–269. https://doi.org/10.1016/j.conbuildmat.2017.07.01510.1016/j.conbuildmat.2017.07.015 ↗
15. Ouyang, J., Liu, K., Sun, D., Xu, W., Wang, A., & Ma, R. (2022). A focus on Ca2+ supply in microbial induced carbonate precipitation and its effect on recycled aggregate. Journal of Building Engineering, 51, 104334. https://doi.org/10.1016/j.jobe.2022.10433410.1016/j.jobe.2022.104334 ↗
16. Poon, C. S., Kou, S. C., & Chan, D. (2006). Influence of steam curing on hardened properties of recycled aggregate concrete. Magazine of Concrete Research, 58, 289–299. https://doi.org/10.1680/macr.2006.58.5.28910.1680/macr.2006.58.5.289 ↗
17. Ramezanianpou, A. M., Esmarili, K., Ghahari, S. A., & Ramezanianpour, A. A. (2014). Influence of initial steam curing and different types of mineral additives on mechanical and durability properties of self-compacting concrete. Construction and Building Materials, 73, 187–194. https://doi.org/10.1016/j.conbuildmat.2014.09.07210.1016/j.conbuildmat.2014.09.072 ↗
18. Shi, J., Liu, B., Wu, X., Qin, J., Jiang, J., & He, Z. (2020a). Evolution of mechanical properties and permeability of concrete during steam curing process. Journal of Building Engineering, 33, 101796. https://doi.org/10.1016/j.jobe.2020.10179610.1016/j.jobe.2020.101796 ↗
19. Shi, J., Liu, B., Zhou, F., Shen, S., Dai, J., Ji, R., & Tan, J. (2020b). Heat damage of concrete surfaces under steam curing and improvement measures. Construction and Building Materials, 252, 119104. https://doi.org/10.1016/j.conbuildmat.2020.11910410.1016/j.conbuildmat.2020.119104 ↗
20. Suryawanshi, S. R., Singh, B., & Bhargava, P. (2015). Characterization of recycled aggregate concrete. Advanced in Structural Engineering. https://doi.org/10.1007/978-81-322-2187-6_13910.1007/978-81-322-2187-6_139 ↗
21. Tan, K., & Zhu, J. (2017). Influences of steam and autoclave curing on the strength and chloride permeability of high strength concrete. Materials and Structures, 50, 1–9. https://doi.org/10.1617/s11527-016-0913-610.1617/s11527-016-0913-6 ↗
22. Wang, C., Xiao, J., Liu, W., & Ma, Z. (2022). Unloading and reloading stress-strain relationship of recycled aggregate concrete reinforced with steel/polypropylene fibers under uniaxial low-cycle loadings. Cement and Concrete Composites, 131, 104597. https://doi.org/10.1016/j.cemconcomp.2022.10459710.1016/j.cemconcomp.2022.104597 ↗
23. Yang, J., Hu, H., He, X., Su, Y., Wang, Y., Tan, H., & Pan, H. (2021). Effect of steam curing on compressive strength and microstructure of high-volume ultrafine fly ash cement mortar. Construction and Building Materials, 266, 120894. https://doi.org/10.1016/j.conbuildmat.2020.12089410.1016/j.conbuildmat.2020.120894 ↗