Alkali-activated slag mortar molded by non-stirring molding: Compressive strength, hydration properties and microstructures
Source abstract
Abstract
Alkali-activated slag (AAS) characterized by fast hardening and high early strength has potential application prospects in concrete canvas (CC), where a non-stirring molding method is required to prepare mortar. This paper provides a new method for the preparation of alkali-activated slag mortar (AASM) by non-stirring (sprinkling-molding), where mechanical properties, hydration properties, and microstructures were investigated. The results suggest that the compressive strength of the sprinkling-molding mortar was slightly lower than that of the conventional stirring-molding mortar, and the compressive strength with sodium silicate content of 15 % the slag mass at 28d can reach 44.5 MPa. The hydration products are dominated by amorphous C-A-S-H gels, with small amounts of hydrotalcite. There are differences in degree of hydration and microstructures of each layer in the sprinkling-molding mortar.
Source: openalex_inverted_index · Quality: baseline
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 (61)
Show source-provided references
1. Ltd. Concrete Canvas, Concrete canvas bhttp://concretecanvas.de/index.htmlN.22.7. 12.
2. Influence of water to cement ratio on mechanical performance of concrete canvas reinforced with warp-knitted spacer fabric10.1016/j.geotexmem.2022.03.011 ↗
3. Application design of concrete canvas (CC) in soil reinforced structure10.1016/j.geotexmem.2016.03.003 ↗
4. Development of concrete canvas for structural applications (Book Chapter)10.1007/978-981-15-6463-5_62 ↗
5. Concrete canvas: solution of pavement
6. Design and construction application of concrete canvas for slope protection10.1016/j.powtec.2018.12.075 ↗
7. Study of canvas concrete in civil engineering works
8. B.C. Bao, Preparation and Performance of Concrete Canvas, Msc Thesis Southeast University, China, 2013.
9. Hydration of high-alumina calcium aluminate cements with carbonate and sulfate additives10.1007/s10973-021-10939-4 ↗
10. Performance of rapid-repair concrete in an aggressive marine environment10.1016/j.conbuildmat.2016.12.004 ↗
11. Q. Fu, M. Bu, Z. Zhang, W. Xu, Q. Yuan, D. Niu, Hydration Characteristics and Microstructure of Alkali-Activated Slag Concrete: A Review, Engineering. (2021).
12. Effect of admixtures on properties of alkali-activated slag concrete10.1016/S0008-8846(00)00349-5 ↗
13. A review: reaction mechanism and strength of slag and fly ash-based alkali-activated materials10.1016/j.conbuildmat.2022.126843 ↗
14. Strength, pore structure and permeability of alkali-activated slag mortars10.1016/S0008-8846(96)00174-3 ↗
15. Influences of geometric patterns of 3D spacer fabric on tensile behavior of concrete canvas10.1016/j.conbuildmat.2014.05.041 ↗
16. Alkali-activated materials10.1016/j.cemconres.2017.02.009 ↗
17. Hydration products and reactivity of blast-furnace slag activated by various alkalis10.1111/j.1151-2916.2003.tb03623.x ↗
18. Shi C., Roy D., Krivenko P., Alkali-activated cements and concretes, (2003).10.1201/9781482266900 ↗
19. Waste glass as partial mineral precursor in alkali-activated slag/fly ash system10.1016/j.cemconres.2017.08.012 ↗
20. Yip · Microanalysis of calcium silicate hydrate gel formed within a geopolymeric binder · 2003 · 38 · 3851
21. Structure of calcium silicate hydrates formed in alkaline-activated slag: influence of the type of alkaline activator10.1111/j.1151-2916.2003.tb03481.x ↗
22. Exploration of the hydration mechanism of slag under the excitation of alkaline solution
23. One-part alkali-activated materials: a review10.1016/j.cemconres.2017.10.001 ↗
24. Reaction kinetics in sodium silicate powder and liquid activated slag binders evaluated using isothermal calorimetry10.1016/j.tca.2012.07.010 ↗
25. D. Ravikumar, N. Neithalath, Effects of activator characteristics on the reaction product formation in slag binders activated using alkali silicate powder and NaOH, Cement and Concrete Composites.
26. Influence of sodium silicate powder silica modulus for mechanical and chemical properties of dry-mix alkali-activated slag mortar10.1016/j.conbuildmat.2019.117354 ↗
27. Properties of cementless mortars activated by sodium silicate10.1016/j.conbuildmat.2007.07.003 ↗
28. CNS, GB/T 203–2008 Standard of Granulated blastfurnace slag used for cement production, China National Standard, 2008.
29. Effect of reactive MgO on hydration and properties of alkali-activated slag pastes with different activators10.1016/j.conbuildmat.2020.121608 ↗
30. CNS, GB/T 17671–2021 Test method of cement mortars strength ( ISO method), China Nation Standard, 2021.
31. A combined 29 Si MAS NMR and selective dissolution technique for the quantitative evaluation of hydrated blast furnace slag cement blends10.1111/j.1551-2916.2006.01431.x ↗
32. GGBS hydration acceleration evidence in supersulfated cement by nanoSiO210.1016/j.cemconcomp.2022.104609 ↗
33. Hydration behaviour and early microstructure of alkali-activated slag binder at low temperature
34. Effects of type and dosage of alkaline activator and temperature on the properties of alkali-activated slag mixtures10.1016/j.conbuildmat.2006.07.002 ↗
35. Effect of dosage of alkaline activator on the properties of alkali-activated slag pastes10.1155/2018/8407380 ↗
36. Recycling utilization of phosphogypsum in eco excess-sulphate cement: Synergistic effects of metakaolin and slag additives on hydration, strength and microstructure10.1016/j.jclepro.2022.131901 ↗
37. Investigation on mechanical properties of excess-sulfate phosphogypsum slag cement: From experiments to molecular dynamics simulation10.1016/j.conbuildmat.2021.125685 ↗
38. Reaction kinetics, gel character and strength of ambient temperature cured alkali activated slag–fly ash blends10.1016/j.conbuildmat.2015.01.065 ↗
39. Alkali-activated cements opportunities and challenges10.1016/S0008-8846(98)00093-3 ↗
40. Influence of the type and concentration of the activator on the microstructure of alkali activated SiMn slag pastes10.1016/j.conbuildmat.2022.128067 ↗
41. Variation in polymerization degree of C-A-S-H gels and its role in strength development of alkali-activated slag binders10.1007/s11595-021-2281-z ↗
42. Microstructural changes in alkali-activated slag mortars induced by accelerated carbonation10.1016/j.cemconres.2017.07.008 ↗
43. Effects of magnesium content and carbonation on the multiscale pore structure of alkali-activated slags10.1016/j.cemconres.2020.105979 ↗
44. Study on processability, compressive strength, drying shrinkage and evolution mechanisms of microstructures of alkali-activated slag-glass powder cementitious material10.1016/j.conbuildmat.2022.128196 ↗
45. Incorporation of Al in C-A-S-H gels with various Ca/Si and Al/Si ratio: microstructural and structural characteristics with DTA/TG, XRD, FTIR and TEM analysis10.1016/j.conbuildmat.2017.08.091 ↗
46. Gao · 2015 · 119
47. Carbonation induced phase evolution in alkali-activated slag/fly ash cements: the effect of silicate modulus of activators10.1016/j.conbuildmat.2019.07.024 ↗
48. Improvement of the performance and microstructural development of alkali-activated slag blends10.1016/j.conbuildmat.2020.120017 ↗
49. Interpreting the early-age reaction process of alkali-activated slag by using combined embedded ultrasonic measurement, thermal analysis, XRD, FTIR and SEM10.1016/j.compositesb.2020.107840 ↗
50. Hydration characterization of Mg2+ blended excess-sulphate phosphogypsum slag cement system during early age10.1016/j.conbuildmat.2022.128191 ↗
51. High temperature resistance of self compacting alkali activated slag/portland cement composite using lightweight aggregate10.1016/j.conbuildmat.2021.123250 ↗
52. An eco-friendly phosphogypsum-based cementitious material: performance optimization and enhancing mechanisms
53. Structure of calcium silicate hydrate (C-S-H): near-, mid-, and far-infrared spectroscopy10.1111/j.1151-2916.1999.tb01826.x ↗
54. The effect of mechanical load on transport property and pore structure of alkali-activated slag concrete10.1016/j.conbuildmat.2018.09.009 ↗
55. Correlating slag chemistry to setting and mechanical behaviors of alkali-activated slag10.1016/j.conbuildmat.2022.127661 ↗
56. Synergistic enhancement effect of recycled fine powder (RFP) cement paste and carbonation on recycled aggregates performances and its mechanism10.1016/j.jclepro.2022.130848 ↗
57. The impact of carbonation at different CO2 concentrations on the microstructure of phosphogypsum-based supersulfated cement paste10.1016/j.conbuildmat.2022.127823 ↗
58. The nanogranular behavior of C-S-H at elevated temperatures (up to 700 °C)10.1016/j.cemconres.2006.09.006 ↗
59. Physical properties, strength, and impurities stability of phosphogypsum-based cold-bonded aggregates10.1016/j.conbuildmat.2022.127307 ↗
60. Utilization of high-volume phosphogypsum in artificial aggregate by compaction granulation: effects of muck on physical properties, strength and leaching stability
61. Durability and microstructure of coral sand concrete incorporating supplementary cementitious materials10.1016/j.conbuildmat.2018.03.082 ↗