Influence of silica fume on pore structure, mechanical properties and carbon emission of reactive powder concrete prepared by ice crystal homogenization technology
Source abstract
Abstract
Under ultra-low water-to-binder ratio conditions, the liquid-bridge effect between powders seriously restricts the development of reactive powder concrete (RPC). Ice crystal homogenization technology fundamentally solves the liquid-bridge problem between powders. However, high carbon emissions still constrain the application of RPC. This paper introduces an innovative RPC material incorporating silica fume (SF) as a supplementary cementitious material to solve environmental concerns and alleviate powder aggregation challenges based on the ice crystal homogenization technology. Experimental results show that there was a significant improvement in compressive and flexural strengths observed, particularly in RPC material containing 15 % SF, which exhibited the most notable enhancements: a 19.7 % increase in compressive strength to 296.3 MPa and a 23.6 % increase in flexural strength to 43.8 MPa. Moreover, the optimized microstructure was reflected in a substantial reduction in water absorption rate and cumulative pore volume by 44.7 % and 54.4 %, respectively. Besides, RPC incorporating 15 % SF achieved the lowest carbon emissions efficiency, with carbon emissions efficiency could be reduced by 79∼93 % compared with conventional UHPC. In conclusion, the use of SF and ice crystal homogenization technology in RPC provides the great potential for developing sustainable construction materials and promoting carbon reduction strategies.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (47)
Show source-provided references
1. Challenges against CO2 abatement strategies in cement industry: a review10.1016/j.jes.2020.11.020 ↗
2. Study of greenhouse gas emissions from smoldering coal fires: estimation considering the indirect greenhouse effect of precursors10.1016/j.jclepro.2024.141113 ↗
3. Global strategies and potentials to curb CO2 emissions in cement industry10.1016/j.jclepro.2012.10.049 ↗
4. Reduction in CO2 emissions during production of cement, with partial replacement of traditional raw materials by civil construction waste (CCW)10.1016/j.jclepro.2020.123302 ↗
5. Sector-level evaluation of China’s CO2 emissions: Trend evolution and index ranking10.1016/j.jclepro.2020.125453 ↗
6. Eco-efficient cements: Potential economically viable solutions for a low-CO2 cement-based materials industry10.1016/j.cemconres.2018.03.015 ↗
7. Achieving net zero greenhouse gas emissions in the cement industry via value chain mitigation strategies10.1016/j.oneear.2021.09.011 ↗
8. Feasibility study on the preparation of ternary cement with calcined slag powder and seashell powder as supplementary cementitious materials10.1016/j.conbuildmat.2023.134223 ↗
9. Laboratory mechanical properties and frost resistance of vibration-compacted cement–fly ash slurry and cement–fly ash-treated macadam mixtures10.1016/j.conbuildmat.2024.135555 ↗
10. Cement replacement by sugar cane bagasse ash: CO2 emissions reduction and potential for carbon credits10.1016/j.jenvman.2010.04.008 ↗
11. Effects of metakaolin, silica fume and slag on pore structure, interfacial transition zone and compressive strength of concrete10.1016/j.conbuildmat.2013.02.075 ↗
12. Mechanical properties of reactive powder concrete under compression at ultra-low temperatures10.1016/j.conbuildmat.2024.138570 ↗
13. Trends toward lower-carbon ultra-high performance concrete (UHPC) – a review10.1016/j.conbuildmat.2024.135602 ↗
14. Sustainable development of eco-friendly ultra-high performance concrete (UHPC): cost, carbon emission, and structural ductility10.1016/j.conbuildmat.2023.132477 ↗
15. A low-carbon alkali activated slag based ultra-high performance concrete (UHPC): reaction kinetics and microstructure development10.1016/j.jclepro.2022.132416 ↗
16. Mechanical properties of ultra-high performance concrete based on reactive powder concrete: effect of sand-to-cement ratio, adding glass fiber and calcium carbonate10.1016/j.conbuildmat.2022.130108 ↗
17. Optimization of alkali-activated binder reactive powder concrete based on concept of packing density10.1016/j.powtec.2024.119778 ↗
18. Compaction index of cement paste of normal consistency10.1016/j.conbuildmat.2009.05.005 ↗
19. Impact of using different materials, curing regimes, and mixing procedures on compressive strength of reactive powder concrete - a review
20. Effect of key mixture parameters on flow and mechanical properties of reactive powder concrete10.1016/j.conbuildmat.2015.09.010 ↗
21. In-situ investigation of superplasticizers: From fluorescence microscopy to concrete rheology10.1016/j.cemconres.2018.08.011 ↗
22. Effect of dosage of silica fume on the macro-performance and micro/nanostructure of seawater Portland cement pastes prepared with an ultra-low water-to-binder ratio10.1016/j.cemconcomp.2022.104700 ↗
23. Early-age hydration characteristics and kinetics of Portland cement pastes with super low w/c ratios using ice particles as mixing water10.1016/j.jmrt.2020.05.082 ↗
24. Pore structure evolution and strength development of hardened cement paste with super low water-to-cement ratios10.1016/j.conbuildmat.2019.117108 ↗
25. Pore structure evolution and strength development of hardened cement paste with super low water-to-cement ratios10.1016/j.conbuildmat.2019.117108 ↗
26. Deformation mechanisms of cement paste with ultra-low water-to-cement ratios under different curing conditions at early ages10.1016/j.conbuildmat.2022.129951 ↗
27. Effect of mineral admixtures on the resistance to sulfate attack of reactive powder concrete10.1016/j.jclepro.2024.140769 ↗
28. A review: enhanced performance of recycled cement and CO2 emission reduction effects through thermal activation and nanosilica incorporation10.1016/j.conbuildmat.2024.135763 ↗
29. Effects of different composite mineral admixtures on the early hydration and long-term properties of cement-based materials: a comparative study10.1016/j.conbuildmat.2021.123547 ↗
30. PET fiber reinforcement efficiency in the mechanical and microstructural characteristics of cemented sand modified with silica fume10.1016/j.conbuildmat.2023.132363 ↗
31. High strength flowable lightweight concrete incorporating low C3A cement, silica fume, stalite and macro-polyfelin polymer fibres10.1016/j.conbuildmat.2021.122410 ↗
32. On the hygrothermal behavior of concrete containing glass powder and silica fume10.1016/j.jclepro.2021.128647 ↗
33. Mechanical anisotropy, rheology and carbon footprint of 3D printable concrete: a review
34. Design and preparation of ultra-high performance concrete with low environmental impact10.1016/j.jclepro.2018.12.318 ↗
35. Designing more sustainable and greener self-compacting concrete10.1016/j.conbuildmat.2015.02.072 ↗
36. Use of silicon and ferrosilicon industry by-products (silica fume) in cement paste and mortar10.1016/j.resconrec.2011.03.004 ↗
37. Modification of water absorption and pore structure of high-volume fly ash cement pastes by incorporating nanosilica
38. Pore size dependent connectivity and ionic transport in saturated cementitious materials10.1016/j.conbuildmat.2019.117680 ↗
39. Study on mechanical properties of silica fume based reactive powder concrete
40. Hydration characteristics, hydration products and microstructure of reactive powder concrete
41. Microstructure, hydration process, and compressive strength assessment of ternary mixtures containing Portland cement, recycled concrete powder, and metakaolin10.1016/j.jclepro.2023.140085 ↗
42. Qualitative and quantitative analysis and identification of flaws in the microstructure of fly ash and metakaolin blended high performance concrete after exposure to elevated temperatures10.1016/j.conbuildmat.2012.09.062 ↗
43. Comparative study on flexural properties of ultra-high performance concrete with supplementary cementitious materials under different curing regimes10.1016/j.conbuildmat.2017.01.052 ↗
44. Tensile behaviour and durability aspects of sustainable ultra-high performance concrete incorporated with GGBS as cementitious material10.1016/j.conbuildmat.2018.11.240 ↗
45. Mechanical properties of reactive powder concrete containing high volumes of ground granulated blast furnace slag10.1016/j.cemconcomp.2010.07.005 ↗
46. Effects of autoclave curing and fly ash on mechanical properties of ultra-high performance concrete10.1016/j.conbuildmat.2017.10.074 ↗
47. Development of green ultra-high performance fiber reinforced concrete containing ultrafine palm oil fuel ash10.1016/j.conbuildmat.2013.07.007 ↗