Eco-friendly lightweight composite prepared with a geopolymer and wheat straw
Source abstract
Abstract
Agricultural waste shows promise for use in lightweight building materials. The combination of a geopolymer and wheat straw (WS) is adopted to produce a kind of eco-friendly lightweight composite. Using WS pretreated with sodium hydroxide (NaOH) and sodium metasilicate (Na2SiO3) solutions, the influence of WS on the properties of the geopolymer–WS composite (GWSC) is investigated. The pretreated WS avoids the retarding effect of the untreated WS on the hydration of the geopolymer and even presents an accelerating effect. Increasing the content of pretreated WS generally results in a reduction in apparent density and strength. A GWSC with an apparent density of 1000–1500 kg/m3 can be prepared, corresponding to a 28-day compressive strength between 5 and 25 MPa. The water absorption linearly increases with the increase in the pretreated WS content, while an appropriate amount of the pretreated WS can enhance the water resistance of the GWSC. A WS/fly ash ratio lower than 8% can produce a GWSC with qualified thermal insulation performance. Alkaline treatment, particularly sodium hydroxide treatment, significantly improves the bonding strength between the fiber and the geopolymer matrix. In addition, pretreated WS saturated with sodium hydroxide and sodium metasilicate solutions is beneficial to the fluidity of the geopolymer–WS mixture and could act as an internal curing agent for enhancing the hydration of the geopolymer.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovative concrete reinforcement materials · Magnesium Oxide Properties and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Professor, Kaifeng Research Center for Engineering Repair and Material Recycle, Henan University, Kaifeng, People’s Republic of China
MSc student, Kaifeng Research Center for Engineering Repair and Material Recycle, Henan University, Kaifeng, People’s Republic of China
Assistant Engineer, Department of Engineering, The City Construction Company Ltd of China Railway 15th Bureau Group, Luoyang, People’s Republic of China
Lecturer, Kaifeng Research Center for Engineering Repair and Material Recycle, Henan University, Kaifeng, People’s Republic of China corresponding author:
Lecturer, Kaifeng Research Center for Engineering Repair and Material Recycle, Henan University, Kaifeng, People’s Republic of China
Professor, State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan, People’s Republic of China
References (52)
Show source-provided references
1. 10.1016/j.conbuildmat.2015.01.03510.1016/j.conbuildmat.2015.01.035 ↗
2. 10.1016/j.jclepro.2020.12004310.1016/j.jclepro.2020.120043 ↗
3. 10.1016/j.jobab.2020.07.00110.1016/j.jobab.2020.07.001 ↗
4. 10.1016/j.enbuild.2019.07.03710.1016/j.enbuild.2019.07.037 ↗
5. 10.1016/j.enbuild.2019.10963610.1016/j.enbuild.2019.109636 ↗
6. 10.1016/j.jobe.2019.10104110.1016/j.jobe.2019.101041 ↗
7. 10.1016/j.conbuildmat.2021.12291110.1016/j.conbuildmat.2021.122911 ↗
8. 10.1016/j.conbuildmat.2019.04.18610.1016/j.conbuildmat.2019.04.186 ↗
9. 10.1177/002199830809774010.1177/0021998308097740 ↗
10. 10.1177/002199830303518010.1177/0021998303035180 ↗
11. 10.1016/j.conbuildmat.2022.12911110.1016/j.conbuildmat.2022.129111 ↗
12. 10.1016/j.jenvman.2020.11112410.1016/j.jenvman.2020.111124 ↗
13. 10.1016/j.conbuildmat.2019.07.08610.1016/j.conbuildmat.2019.07.086 ↗
14. 10.1016/j.conbuildmat.2016.03.06710.1016/j.conbuildmat.2016.03.067 ↗
15. 10.1016/j.conbuildmat.2014.05.09010.1016/j.conbuildmat.2014.05.090 ↗
16. 10.1016/j.conbuildmat.2016.04.06510.1016/j.conbuildmat.2016.04.065 ↗
17. 10.1016/j.conbuildmat.2019.11737410.1016/j.conbuildmat.2019.117374 ↗
18. 10.1016/j.jobe.2022.10456810.1016/j.jobe.2022.104568 ↗
19. 10.1016/j.enbuild.2014.11.03410.1016/j.enbuild.2014.11.034 ↗
20. 10.1016/j.enbuild.2020.11034810.1016/j.enbuild.2020.110348 ↗
21. 10.1016/j.compositesb.2019.10749010.1016/j.compositesb.2019.107490 ↗
22. Kriven WM · American Ceramic Society Bulletin · 2010 · 89 · 31
23. Davidovits J · 1993
24. 10.1016/j.conbuildmat.2015.03.03610.1016/j.conbuildmat.2015.03.036 ↗
25. 10.1016/j.conbuildmat.2018.07.11010.1016/j.conbuildmat.2018.07.110 ↗
26. 10.1016/j.conbuildmat.2020.12053610.1016/j.conbuildmat.2020.120536 ↗
27. Fan L · 2021
28. 10.1016/j.jhazmat.2019.12199410.1016/j.jhazmat.2019.121994 ↗
29. 10.1016/j.cemconres.2020.10619410.1016/j.cemconres.2020.106194 ↗
30. 10.1016/j.envres.2022.11433310.1016/j.envres.2022.114333 ↗
31. 10.1016/j.matchemphys.2021.12430410.1016/j.matchemphys.2021.124304 ↗
32. 10.1016/j.conbuildmat.2019.11671210.1016/j.conbuildmat.2019.116712 ↗
33. SAC (Standardization Administration of the People’s Republic of China) · 2012
34. SAC · 2011
35. SAC · 2013
36. SAC · 2021
37. 10.1016/j.conbuildmat.2020.11826210.1016/j.conbuildmat.2020.118262 ↗
38. SAC · 2011
39. 10.1016/j.clay.2019.10533310.1016/j.clay.2019.105333 ↗
40. 10.1016/j.conbuildmat.2021.12429810.1016/j.conbuildmat.2021.124298 ↗
41. Chan C · International Journal of Civil and Environmental Engineering · 2011 · 3 · 51
42. 10.1016/j.compositesb.2014.01.02910.1016/j.compositesb.2014.01.029 ↗
43. 10.1016/j.compositesb.2011.04.00110.1016/j.compositesb.2011.04.001 ↗
44. 10.1016/j.matdes.2014.01.03610.1016/j.matdes.2014.01.036 ↗
45. 10.1016/j.conbuildmat.2022.12650610.1016/j.conbuildmat.2022.126506 ↗
46. 10.1016/j.conbuildmat.2021.12456010.1016/j.conbuildmat.2021.124560 ↗
47. 10.1016/j.conbuildmat.2022.12790310.1016/j.conbuildmat.2022.127903 ↗
48. 10.1016/j.cemconcomp.2015.03.01310.1016/j.cemconcomp.2015.03.013 ↗
49. 10.1016/j.conbuildmat.2022.12943610.1016/j.conbuildmat.2022.129436 ↗
50. 10.1016/j.cscm.2021.e0056010.1016/j.cscm.2021.e00560 ↗
51. 10.3390/ma1006057910.3390/ma10060579 ↗
52. 10.1016/j.jascer.2013.01.00210.1016/j.jascer.2013.01.002 ↗