Enhancement of Cement Paste with Carboxylated Carbon Nanotubes and Poly(vinyl alcohol)
Source abstract
Abstract
Cement has been a major consumable material for construction in the world since its invention, but its low flexural strength is the main defect affecting the service life of structures. To adapt cement-based materials to a more stringent environment, carboxylated carbon nanotubes (CNTs-COOH) and poly(vinyl alcohol) (PVA) are proposed to enhance the mechanical properties of cement paste. This study systematically verifies the synergistic effect of CNTs-COOH/PVA on the performance of cement paste. First, UV–Vis spectroscopy and FTIR spectroscopy prove that CNTs-COOH can provide attachment sites for PVA and PVA can improve the dispersion and stability of CNTs-COOH in water, which demonstrates the feasibility of synergistically enhancing cement paste. When a 0.015% CNTs-COOH suspension with 0.1% PVA is added, the flexural strength of the cement paste increases by 73, 32, and 42% compared with control specimens at curing ages of 3, 7, and 28 days, respectively. The strength enhancement mechanism is revealed from the aspects of cement matrix enhancement and interface enhancement. Thermogravimetric (TG) analysis and mercury intrusion porosimetry (MIP) prove that CNTs-COOH can enhance the hydration degree of the cement matrix and fill the pores introduced by PVA. Based on the fact that PVA can improve the dispersibility and the nucleation site effect of CNTs-COOH in cement paste, molecular dynamics simulation confirms that PVA can bridge CNTs-COOH and C–S–H to enhance the interfacial bonding by 64.1%.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Carbon Nanotubes in Composites · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
Department of Civil Engineering, Qingdao University of Technology, Qingdao 266000, China
Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, China
Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri 65401, United States
Funding
Natural Science Foundation of Hebei Province · Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering · National Natural Science Foundation of China
References (65)
Show source-provided references
1. 10.1016/j.cemconcomp.2016.07.01010.1016/j.cemconcomp.2016.07.010 ↗
2. 10.1016/j.cemconcomp.2021.10403010.1016/j.cemconcomp.2021.104030 ↗
3. 10.1002/prot.34004010610.1002/prot.340040106 ↗
4. 10.14359/51683366c10.14359/51683366c ↗
5. 10.1155/2014/67179510.1155/2014/671795 ↗
6. 10.1016/j.conbuildmat.2018.10.06610.1016/j.conbuildmat.2018.10.066 ↗
7. 10.1016/j.conbuildmat.2013.05.04810.1016/j.conbuildmat.2013.05.048 ↗
8. 10.1016/j.cemconcomp.2019.10334710.1016/j.cemconcomp.2019.103347 ↗
9. 10.1021/am300985p10.1021/am300985p ↗
10. 10.1021/acsanm.8b0235510.1021/acsanm.8b02355 ↗
11. 10.1021/acsanm.9b0225210.1021/acsanm.9b02252 ↗
12. 10.1021/acsanm.0c0301310.1021/acsanm.0c03013 ↗
13. 10.1021/acsami.0c1531310.1021/acsami.0c15313 ↗
14. 10.1021/acsanm.8b0016210.1021/acsanm.8b00162 ↗
15. 10.1016/j.cemconcomp.2012.07.00810.1016/j.cemconcomp.2012.07.008 ↗
16. 10.1039/C5RA18602A10.1039/C5RA18602A ↗
17. 10.1016/j.cemconcomp.2016.09.00710.1016/j.cemconcomp.2016.09.007 ↗
18. 10.1016/j.carbon.2010.01.02810.1016/j.carbon.2010.01.028 ↗
19. 10.1016/j.conbuildmat.2020.12074610.1016/j.conbuildmat.2020.120746 ↗
20. 10.1016/j.carbon.2004.12.01710.1016/j.carbon.2004.12.017 ↗
21. 10.1016/j.jobe.2021.10240710.1016/j.jobe.2021.102407 ↗
22. 10.1134/S003602441602027810.1134/S0036024416020278 ↗
23. 10.1016/j.envpol.2019.05.07910.1016/j.envpol.2019.05.079 ↗
24. 10.1016/j.ijpharm.2010.03.02410.1016/j.ijpharm.2010.03.024 ↗
25. 10.1021/acsami.0c1764910.1021/acsami.0c17649 ↗
26. 10.1016/j.conbuildmat.2015.12.18810.1016/j.conbuildmat.2015.12.188 ↗
27. 10.1021/acsanm.9b0201010.1021/acsanm.9b02010 ↗
28. 10.3390/app911217810.3390/app9112178 ↗
29. 10.1016/j.cemconcomp.2012.12.00610.1016/j.cemconcomp.2012.12.006 ↗
30. 10.1002/app.4617710.1002/app.46177 ↗
31. 10.1016/j.conbuildmat.2019.11787110.1016/j.conbuildmat.2019.117871 ↗
32. 10.1021/acsami.6b0113010.1021/acsami.6b01130 ↗
33. 10.1021/acsami.8b0648210.1021/acsami.8b06482 ↗
34. 10.1177/002199832097134610.1177/0021998320971346 ↗
35. 10.1016/j.compositesb.2018.02.03410.1016/j.compositesb.2018.02.034 ↗
36. 10.1016/j.matlet.2013.10.08810.1016/j.matlet.2013.10.088 ↗
37. 10.1016/j.cemconcomp.2020.10379110.1016/j.cemconcomp.2020.103791 ↗
38. 10.1016/j.conbuildmat.2018.11.16910.1016/j.conbuildmat.2018.11.169 ↗
39. 10.1016/j.cemconcomp.2019.02.01310.1016/j.cemconcomp.2019.02.013 ↗
40. 10.1016/j.mtchem.2021.10047710.1016/j.mtchem.2021.100477 ↗
41. 10.1007/s10934-013-9765-410.1007/s10934-013-9765-4 ↗
42. 10.12989/cac.2013.11.4.31710.12989/cac.2013.11.4.317 ↗
43. 10.1016/j.cemconcomp.2019.04.00510.1016/j.cemconcomp.2019.04.005 ↗
44. 10.1016/j.conbuildmat.2021.12240610.1016/j.conbuildmat.2021.122406 ↗
45. 10.1039/C0CP00516A10.1039/C0CP00516A ↗
46. 10.1016/j.engfracmech.2014.09.01110.1016/j.engfracmech.2014.09.011 ↗
47. 10.1016/j.cemconres.2021.10636610.1016/j.cemconres.2021.106366 ↗
48. 10.1021/acsami.7b1279510.1021/acsami.7b12795 ↗
49. 10.1016/j.compositesb.2018.12.14210.1016/j.compositesb.2018.12.142 ↗
50. 10.1021/la401401510.1021/la4014015 ↗
51. 10.1016/j.cemconres.2019.10589110.1016/j.cemconres.2019.105891 ↗
52. 10.1016/j.apt.2010.02.00810.1016/j.apt.2010.02.008 ↗
53. 10.1016/j.msec.2007.10.08810.1016/j.msec.2007.10.088 ↗
54. 10.1016/j.jcis.2020.02.05310.1016/j.jcis.2020.02.053 ↗
55. 10.1016/j.compositesa.2017.10.00110.1016/j.compositesa.2017.10.001 ↗
56. 10.1016/j.conbuildmat.2017.04.13210.1016/j.conbuildmat.2017.04.132 ↗
57. 10.1016/j.tca.2014.08.00810.1016/j.tca.2014.08.008 ↗
58. 10.1016/j.cemconres.2004.10.02710.1016/j.cemconres.2004.10.027 ↗
59. 10.1016/j.cemconres.2003.07.00610.1016/j.cemconres.2003.07.006 ↗
60. 10.1016/S0008-8846(99)00022-810.1016/S0008-8846(99)00022-8 ↗
61. 10.1016/j.chemosphere.2021.13091810.1016/j.chemosphere.2021.130918 ↗
62. 10.1016/j.compositesa.2017.01.00810.1016/j.compositesa.2017.01.008 ↗
63. 10.1016/j.compositesb.2018.12.06510.1016/j.compositesb.2018.12.065 ↗
64. 10.1016/j.conbuildmat.2013.12.01010.1016/j.conbuildmat.2013.12.010 ↗
65. 10.1016/j.conbuildmat.2021.12394710.1016/j.conbuildmat.2021.123947 ↗