Development of sustainable alkali-activated slag bricks with high content of carbonated recycled concrete fines: Strength, microstructure and environmental benefit
Source abstract
Abstract
This research presents a novel method of recycling construction waste while capturing CO 2 through the formation of mineral carbon. The technology uses carbonated recycled concrete fines (CRCF) as the primary raw material to produce sustainable, high-performance alkali bricks with high replacement rates. Firstly, a general assessment of the physical and chemical properties of CRCF was carried out, which revealed the formation of silica gel encapsulating the surface of CRCF during carbonation. Subsequently, alkali bricks were prepared utilizing CRCF. The study investigated the impact of various mix proportions, water-to-cement ratios, and manufacturing process parameters on brick strength. Additionally, an in-depth analysis of reaction products and brick microstructures was carried out. The results showed that the bricks produced from CRCF were stronger than those from RCF, indicating enhanced reactivity after carbonation. Finally, an analysis demonstrated that utilizing RCF from construction waste can significantly reduce carbon dioxide emissions, thereby mitigating the environmental impact associated with cement production.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Recycled Aggregate Concrete Performance · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (52)
Show source-provided references
1. Use of recycled concrete aggregate in concrete: a review10.3846/13923730.2013.799093 ↗
2. Construction and demolition waste generation and properties of recycled aggregate concrete: a global perspective10.1016/j.jclepro.2018.03.085 ↗
3. Mechanical properties of concrete produced with recycled coarse aggregates–Influence of the use of superplasticizers10.1016/j.conbuildmat.2013.03.011 ↗
4. Enhanced early hydration and mechanical properties of cement-based materials with recycled concrete powder modified by nano-silica
5. Considering life-cycle environmental impacts and society's willingness for optimizing construction and demolition waste management fee: an empirical study of China10.1016/j.jclepro.2018.09.170 ↗
6. Reclamation chain of waste concrete: a case study of Shanghai10.1016/j.wasman.2015.09.018 ↗
7. Advanced progress in recycling municipal and construction solid wastes for manufacturing sustainable construction materials
8. Monitoring global carbon emissions in 202210.1038/s43017-023-00406-z ↗
9. Trends in global CO2 and total greenhouse gas emissions
10. W. Obergassel, C. Xia, Global Climate Governance for the Decarbonisation of the Buildings Sector, (2022).
11. Preparation of regenerated binding material using waste concrete
12. Influence of recycled powder on hydration characteristics of cement paste
13. Carbon Capture and Utilization by mineralization of cement pastes derived from recycled concrete10.1038/s41598-020-62503-z ↗
14. The utilization of eco-friendly recycled powder from concrete and brick waste in new concrete: a critical review10.1016/j.cemconcomp.2020.103807 ↗
15. Utilising CO2 technologies for recycled aggregate concrete: a critical review10.1016/j.conbuildmat.2020.118903 ↗
16. Accelerated carbonation of regenerated cementitious materials from waste concrete for CO2 sequestration
17. Carbon-conditioned recycled aggregate in concrete production10.1016/j.jclepro.2016.06.007 ↗
18. Effects of carbonated hardened cement paste powder on hydration and microstructure of Portland cement10.1016/j.conbuildmat.2018.07.159 ↗
19. CO2 Treatment of hydrated cement powder: characterization and application consideration10.1061/(ASCE)MT.1943-5533.0003652 ↗
20. Effect of carbonated cement paste on composite cement hydration and performance10.1016/j.cemconres.2020.106090 ↗
21. Experimental study on CO2 curing for enhancement of recycled aggregate properties10.1016/j.conbuildmat.2013.09.008 ↗
22. Use of a CO2 curing step to improve the properties of concrete prepared with recycled aggregates10.1016/j.cemconcomp.2013.09.008 ↗
23. Performance enhancement of recycled concrete aggregates through carbonation10.1061/(ASCE)MT.1943-5533.0001296 ↗
24. Surface characterization of carbonated recycled concrete fines and its effect on the rheology, hydration and strength development of cement paste10.1016/j.cemconcomp.2020.103809 ↗
25. Effect of alkalis on products of enforced carbonation of cement paste10.1016/j.conbuildmat.2021.123203 ↗
26. Carbonation of alkali activated binders and comparison with the performance of ordinary Portland cement and blended cement binders
27. Effects of pretreated recycled powder substitution on mechanical properties and microstructures of alkali-activated cement10.1016/j.conbuildmat.2023.133360 ↗
28. Carbon-dioxide-activated bonding material with low water demand10.1680/jadcr.18.00222 ↗
29. FTIR study of the effect of temperature and nanosilica on the nano structure of C–S–H gel formed by hydrating tricalcium silicate10.1016/j.conbuildmat.2013.10.056 ↗
30. Phase assemblance evolution during wet carbonation of recycled concrete fines10.1016/j.cemconres.2022.106733 ↗
31. Accelerated carbonation of hardened cement pastes: Influence of porosity10.1016/j.conbuildmat.2019.07.088 ↗
32. Effect of environmental conditions on the volume deformation of cement mortars with sewage sludge ash
33. Effect of basalt powder on hydration, rheology, and strength development of cement paste10.3390/ma15238632 ↗
34. Physical and chemical assessment of lime–metakaolin mortars: influence of binder: aggregate ratio10.1016/j.cemconcomp.2013.06.010 ↗
35. Effects of Ca (OH) 2–CaCO3 concentration distribution on the pH and pore structure in natural carbonated cover concrete: a case study10.1016/j.conbuildmat.2018.08.041 ↗
36. Mechanical and mineralogical properties of natural hydraulic lime-metakaolin mortars in different curing conditions10.1016/j.conbuildmat.2013.10.045 ↗
37. Electrokinetic properties which control the coagulation of silicate cement suspensions during early age hydration10.1006/jcis.1998.5445 ↗
38. Understanding the adhesion mechanisms between CSH and fillers10.1016/j.cemconres.2017.07.006 ↗
39. Zeta-potential study of calcium silicate hydrates interacting with alkaline cations10.1006/jcis.2001.7897 ↗
40. Production of sustainable lime-based brick using carbonated recycled concrete fines: Mechanical, mineralogical and microstructure properties10.1016/j.conbuildmat.2023.134385 ↗
41. Experimental study on fundamental mechanical properties of autoclaved sand-lime brick masonr10.4028/www.scientific.net/AMR.168-170.345 ↗
42. Development of a new generation of eco-friendly concrete blocks by accelerated mineral carbonation10.1016/j.jclepro.2016.06.062 ↗
43. Degradation mechanism of hybrid fly ash/slag based geopolymers exposed to elevated temperatures10.1016/j.cemconres.2021.106649 ↗
44. Compatibility studies between NASH and CASH gels. Study in the ternary diagram Na2O–CaO–Al2O3–SiO2–H2O10.1016/j.cemconres.2011.05.006 ↗
45. Natural carbonation-induced phase and molecular evolution of alkali-activated slag: effect of activator composition and curing temperature10.1016/j.conbuildmat.2020.118726 ↗
46. Analysis on pore structure of non-dispersible underwater concrete in saline soil area10.32604/jrm.2021.013664 ↗
47. Multiscale study of microstructural evolution in alkali-activated fly ash-slag paste at elevated temperatures10.1016/j.cemconcomp.2023.105258 ↗
48. An assessment of CCS costs, barriers and potential10.1016/j.esr.2018.08.003 ↗
49. G.C.C. Association, Sustainability Guidelines for the Monitoring and Reporting of CO2 Emissions from Cement Manufacturing, (2018)..
50. The calcium looping process for low CO2 emission cement and power10.1016/j.egypro.2013.06.645 ↗
51. Analysis of carbon reduction benefits from construction waste resource utilization
52. Analysis of the current situation of construction waste treatment and the benefits of resource utilisation