Utilisation of light calcined magnesite tailings to compensate the autogenous shrinkage of steam-cured cement paste
Source abstract
Abstract
Calcined magnesia in a designed formulation was prepared with magnesite tailings below 1100°C to compensate for the autogenous shrinkage of steam-cured Portland cement and fly ash pastes with low water/binder ratios. The morphology and hydration properties of the light calcined magnesite tailings (LCM) were studied by field-emission source scanning electron microscopy (FESEM) and isothermal calorimetry. The hydration of magnesium oxide in paste and the microstructure of the paste were determined by thermogravimetric and differential thermal analysis, mercury intrusion porosimetry, FESEM and backscattered SEM. The results show that the hydration activity of LCM can be easily designed by regulating the calcining temperature. Both early age (7 d) and later age (90 d) autogenous shrinkage of steam-cured cement paste could be partially compensated when adding 4 wt% LCM prepared at 850°C (M85), probably due to the locally restrained continued slow hydration of magnesium oxide in M85.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Concrete Properties and Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, Hubei, PR China
School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, PR China
School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan, PR China (corresponding author: )
Department of Materials Science and Engineering, Southeast University, Nanjing, Jiangsu, PR China
References (37)
Show source-provided references
1. ASTM · 2008
2. 10.1016/S0008-8846(98)00140-910.1016/S0008-8846(98)00140-9 ↗
3. 10.1016/j.conbuildmat.2010.06.04910.1016/j.conbuildmat.2010.06.049 ↗
4. 10.1016/j.cemconcomp.2004.07.00310.1016/j.cemconcomp.2004.07.003 ↗
5. 10.1016/j.conbuildmat.2012.03.00510.1016/j.conbuildmat.2012.03.005 ↗
6. Deng M · Nanjing Institute of Chemical Technology · 1990 · 12 · 1
7. 10.1016/S1872-5791(08)60047-010.1016/S1872-5791(08)60047-0 ↗
8. Erlin B · 1999
9. 10.1016/j.buildenv.2007.01.03710.1016/j.buildenv.2007.01.037 ↗
10. GB · 2005
11. GB · 2007
12. GB · 2012
13. GSB · 2014
14. 10.1016/S0008-8846(98)00052-010.1016/S0008-8846(98)00052-0 ↗
15. 10.1016/S0008-8846(02)01029-310.1016/S0008-8846(02)01029-3 ↗
16. 10.1016/j.matlet.2007.02.03210.1016/j.matlet.2007.02.032 ↗
17. 10.1016/S0008-8846(02)01054-210.1016/S0008-8846(02)01054-2 ↗
18. Li ZJ · Refractories · 2011 · 45 · 382
19. 10.1016/j.conbuildmat.2010.04.01810.1016/j.conbuildmat.2010.04.018 ↗
20. Liu Z · Cement and Concrete Research · 1991 · 21 · 104910.1016/0008-8846(91)90065-P ↗
21. Liu JP · Journal of Building Materials · 2014 · 17 · 15
22. Mehta PK · 2006
23. 10.1016/0008-8846(79)90097-810.1016/0008-8846(79)90097-8 ↗
24. 10.1016/j.cemconres.2009.09.02510.1016/j.cemconres.2009.09.025 ↗
25. 10.1016/j.cemconcomp.2011.11.01810.1016/j.cemconcomp.2011.11.018 ↗
26. 10.1016/S0958-9465(97)00064-410.1016/S0958-9465(97)00064-4 ↗
27. Newman J · 2003
28. 10.1016/S0008-8846(97)00202-010.1016/S0008-8846(97)00202-0 ↗
29. Tangtermsirikul S · 1998 · 175
30. 10.1016/S0008-8846(01)00466-510.1016/S0008-8846(01)00466-5 ↗
31. Tazawa EI · Cement and Concrete Research · 1999 · 25 · 163310.1016/0008-8846(95)00159-X ↗
32. 10.1016/j.cemconres.2004.07.01010.1016/j.cemconres.2004.07.010 ↗
33. Wang K · ACI Materials Journal · 2001 · 98 · 458
34. 10.1016/S1003-6326(11)60973-410.1016/S1003-6326(11)60973-4 ↗
35. 10.1016/S0008-8846(00)00453-110.1016/S0008-8846(00)00453-1 ↗
36. 10.1016/j.cemconres.2004.08.01110.1016/j.cemconres.2004.08.011 ↗
37. Zhang YK · Science and Technology Information · 2008 · 5 · 424