Effects of colloidal nanoSiO2 on fly ash hydration
Source abstract
Abstract
The influences of colloidal nanoSiO₂ (CNS) addition on fly ash hydration and microstructure development of cement–fly ash pastes were investigated. The results revealed that fly ash hydration is accelerated by CNS at early age thus enhancing the early age strength of the materials. However, the pozzolanic reaction of fly ash at later age is significantly hindered due to the reduced CH content resulting from CNS hydration and the hindered cement hydration, as well as due to a layer of dense, low Ca/Si hydrate coating around fly ash particles. The results and discussions explain why the cementitious materials containing nanoSiO₂ had a lower strength gain at later ages. Methods of mitigating the adverse effect of nanoSiO₂ on cement/FA hydration at later ages were proposed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
Show source-provided references
1. Heat of hydration of fly ash as a predictive tool10.1016/S0016-2361(97)00058-6 ↗
2. Degree of hydration and gel/space ratio of high-volume fly ash/cement systems10.1016/S0008-8846(00)00213-1 ↗
3. Hydration of fly ash cement10.1016/j.cemconres.2004.09.008 ↗
4. Heat evolution of high-volume fly ash concrete10.1016/S0008-8846(01)00755-4 ↗
5. Mechanical treatment of fly ashes: Part IV. Strength development of ground fly ash-cement mortars cured at different temperatures10.1016/S0008-8846(00)00218-0 ↗
6. Activation of blended cements containing fly ash10.1016/S0008-8846(01)00526-9 ↗
7. Effect of mechanochemical activation on reactivity of cement kiln dust–fly ash systems
8. Activation of the fly ash pozzolanic reaction by hydrothermal conditions10.1016/S0008-8846(03)00085-1 ↗
9. Effects of curing temperature and NaOH addition on hydration and strength development of clinker-free CKD-fly ash binders10.1016/j.cemconres.2003.08.003 ↗
10. Effect of silica fume and fly ash on heat of hydration of Portland cement10.1016/S0008-8846(02)00742-1 ↗
11. Characteristics of silica-fume concrete10.1061/(ASCE)0899-1561(1994)6:3(357) ↗
12. An efficient material: silica fume concrete-properties, applications, and limitations
13. Influence of nano-SiO2 addition on properties of hardened cement paste as compared with silica fume10.1016/j.conbuildmat.2005.09.001 ↗
14. Characteristics of cement mortar with nano-SiO2 particles10.1016/j.conbuildmat.2005.12.020 ↗
15. Properties of high-volume fly ash concrete incorporating nano-SiO210.1016/j.cemconres.2003.11.013 ↗
16. Enhancing the reactivity of normal and fly ash concrete using colloidal nano-silica
17. Use of nano-silica to reduce setting time and increase early strength of concretes with high volumes of fly ash or slag10.1016/j.conbuildmat.2011.11.013 ↗
18. Use of nano-silica to increase early strength and reduce setting time of concretes with high volumes of slag10.1016/j.cemconcomp.2012.02.005 ↗
19. The effects of zinc dioxide nanoparticles on flexural strength of self-compacting concrete10.1016/j.compositesb.2010.09.001 ↗
20. Seeding effect of nano-CaCO3 on the hydration of tricalcium silicate10.3141/2141-11 ↗
21. Characteristics of cement mortar with nano-SiO2 Particles
22. Mortars with nano-SiO2 and micro-SiO2 investigated by experimental design10.1016/j.conbuildmat.2010.01.012 ↗
23. The effects of SiO2 nanoparticles on physical and mechanical properties of high strength compacting concrete10.1016/j.compositesb.2010.09.025 ↗
24. The nature of C–S–H in hardened cements10.1016/S0008-8846(99)00168-4 ↗
25. . MK Impex Corporation, Canada.
26. ASTM C305–2011. Standard practice for mechanical mixing of hydraulic cement pastes and mortars of plastic consistency. ASTM International, West Conshohocken, PA, USA; 2008.
27. ASTM C109–08. Standard test method for compressive strength of hydraulic cement mortars (Using 2-in. or [50-mm] cube specimens). ASTM International, West Conshohocken, PA, USA; 2008.
28. Determination of cement hydration and pozzolanic reaction extents for fly-ash cement pastes10.1016/j.conbuildmat.2011.07.007 ↗
29. Quantitative determination of fly ash in the hydrated fly ash - CaSO4⋅2H2O-Ca(OH)2 system10.1016/0008-8846(85)90047-X ↗
30. Effect of fly ash on autogenous shrinkage10.1016/j.cemconres.2004.07.010 ↗
31. Backscattered electron imaging of cementitious microstructures: understanding and quantification10.1016/j.cemconcomp.2004.02.029 ↗
32. Influence of nucleation seeding on the hydration kinetics and compressive strength of alkali activated slag paste10.1016/j.cemconres.2011.04.002 ↗
33. Hydration of tricalcium silicate in the presence of synthetic calcium-silicate-hydrate10.1039/b910216g ↗
34. Influence of nucleation seeding on the hydration mechanisms of tricalcium silicate and cement
35. Sato T, Beaudoin J. The Effect of nano-sized CaCO3 addition on the hydration of cement paste containing high volumes of fly ash. In: 12th international congress on the chemistry of cement, Montreal, QC; 2007. p. 1–12.
36. The influence of alkalinity on activation and microstructure of fly ash10.1016/S0008-8846(00)00252-0 ↗
37. Mineral admixtures in mortars: effect of inert materials on short-term hydration10.1016/S0008-8846(03)00183-2 ↗
38. Spatially resolved analysis of calcium–silica tubes in reverse chemical gardens10.1016/j.colsurfa.2011.08.041 ↗
39. Cement tubules — another look10.1016/0008-8846(80)90027-7 ↗
40. Studies of the growth of “silicate gardens” and related phenomena10.1007/BF00550628 ↗
41. The hydration of Portland cement10.1038/261486a0 ↗
42. The microstructure and mechanical properties of blended cements hydrated at various temperatures10.1016/S0008-8846(01)00471-9 ↗
43. Effect of temperature on the hydration of the main clinker phases in Portland cements: part I, neat cements10.1016/S0008-8846(98)00115-X ↗
44. Effect of temperature on the pore solution, microstructure and hydration products of Portland cement pastes10.1016/j.cemconres.2006.11.016 ↗
45. Verbeck G, Helmuth R. Structures and physical properties of cement paste. In: Proc 5th Int Symp Chem Cem 1968; 3: 1–32.
46. Effect of curing temperature on the pore structure of tricalcium silicate pastes10.1016/0021-9797(80)90223-4 ↗
47. Backscattered electron imaging of cement pastes hydrated at different temperatures
48. Thomas J, Jennings H. The nanostructure of low-CO2 Concrete for a sustainable infrastructure. In: Report on year 1 activities and recommendations for future work, a scientific collaboration between Lafarge Center for Research (LCR) and Northwestern University (NWU); 2010.
49. Hydrated layer formation on tricalcium and dicalcium silicate surfaces: experimental study and numerical simulations10.1021/la011201z ↗
50. Experimental investigation of the size effects of SiO2 nano-particles on the mechanical properties of binary blended concrete10.1016/j.compositesb.2010.08.003 ↗
51. Formation of the C–S–H Layer during early hydration of tricalcium silicate grains with different sizes10.1021/jp0547212 ↗
52. The zeta-potential of cement: Pt. V: effect of surfactants10.1016/0008-8846(88)90010-5 ↗
53. Synthesis and characterization of positive-charge functionalized mesoporous silica nanoparticles for oral drug delivery of an anti-inflammatory drug10.1002/adfm.200800521 ↗