Improving the salt frost resistance of recycled aggregate concrete modified by air-entraining agents and nano-silica under sustained compressive loading
Source abstract
Abstract
This paper systematically investigated the combined effects of sustained compressive loading and the salt frost resistance for recycled aggregate concrete (RAC) incorporating air-entraining agents (AEA) and nano silica (NS). The effects of different RCA replacement ratios, freeze-thaw cycles, AEA dosage and compressive stress level on the freeze-thaw damage properties including the apparent morphology, mass loss rate and relative dynamic elastic modulus (RDEM) were discussed. The microstructure evolution of RAC samples before and after freeze-thaw cycles were characterized and analyzed through the SEM observation, microhardness measurement and X-CT tests. The synergistic modification mechanism of NS and AEA on RAC under salt frost action were investigated, and the link between the macroscopic and microscopic properties of air-entrained NS-modified RAC was further explored. The results showed that the RAC mixed with a certain amount of AEA and NS dosages exhibited the stronger salt frost resistance compared to that of control group. The effect of AEA dosage and compressive stress level exhibited similar changing trends on the salt frost resistance of RAC. When adding a moderate amount of AEA and applying a certain sustained compressive loading, the RDEM loss of RAC was reduced so that the salt frost resistance was partly improved. Similarly, the moderate AEA dosages can reduce the deterioration at ITZs of RAC. The compound use of NS and AEA proved to be as an efficient method to strengthen the microstructure of RAC, further improving the frost resistance under the coupled actions of sustained compressive loading and chloride salt attack. This study provides a feasible approach to improve the salt frost resistance of RAC under the coupled actions of sustained compressive loading, which is expected to promote the application and extension of RAC in complex environmental regions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Recycled Aggregate Concrete Performance · Innovative concrete reinforcement materials · Innovations in Concrete and Construction Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (66)
Show source-provided references
1. Performance assessment of seawater fly ash cement paste with integrated physicochemical-geochemical simulation platform and experimental validation
2. Rapid recognition method of red brick content in recycled brick-concrete aggregates and powder based on color segmentation
3. Multi-ion kinetics in pseudo-concrete electrolyte associated with macro-cell corrosion10.1016/j.cemconcomp.2022.104690 ↗
4. Freeze-thaw resistance of recycled aggregate concrete incorporating ferronickel slag as fine aggregate10.1016/j.conbuildmat.2022.129178 ↗
5. Durability of recycled aggregate concrete–a review.10.1016/j.cemconcomp.2018.03.008 ↗
6. Damage to recycled concrete with different aggregate substitution rates from the coupled action of freeze-thaw cycles and sulfate attack10.1016/j.conbuildmat.2019.06.060 ↗
7. Mass transport properties of recycled aggregate concrete under coupling the action of chloride salt attack and uniaxial tensile loading
8. Durability of recycled aggregate concrete under coupling mechanical loading and freeze-thaw cycle in salt-solution10.1016/j.conbuildmat.2017.12.194 ↗
9. Coupled effects of sustained compressive loading and freeze–thaw cycles on water penetration into concrete.10.1002/suco.201900200 ↗
10. Deterioration mechanism of interface transition zone of concrete pavement under fatigue load and freeze-thaw coupling in cold climatic areas10.1016/j.conbuildmat.2017.11.031 ↗
11. Multi-scale and multi-chemo–physics lifecycle evaluation of structural concrete under environmental and mechanical impacts
12. Resistance of recycled aggregate concrete to freeze-thaw and deicing salts10.1016/j.proeng.2016.07.367 ↗
13. Bond behavior between recycled coarse aggregate concrete and steel bar after salt-frost cycles10.1016/j.conbuildmat.2019.07.301 ↗
14. Application of optimization-based regression analysis for evaluation of frost durability of recycled aggregate concrete10.1002/suco.202300566 ↗
15. Multi objective optimization of recycled aggregate concrete based on explainable machine learning
16. Durability of recycled aggregate concrete in cold regions
17. Performance enhancement of recycled concrete aggregate–a review.10.1016/j.jclepro.2015.08.057 ↗
18. Effect of silica fume on frost resistance and recyclability potential of recycled aggregate concrete under freeze–thaw environment.
19. Study on the penetration and diffusion of chloride ions in interface transition zone of recycled concrete prepared by modified recycled coarse aggregates
20. Engineering properties of treated recycled concrete aggregate (RCA) for structural applications10.1016/j.conbuildmat.2013.03.014 ↗
21. The hydration, pore structure and strength of cement-based material prepared with waste soaking solution from acetic acid treatment of regenerated aggregates10.1016/j.jclepro.2019.06.335 ↗
22. Straightening methods for RCA and RAC—a review10.1016/j.cemconcomp.2023.105145 ↗
23. Studies on performance enhancement of recycled aggregate by incorporating bio and nano materials10.1016/j.conbuildmat.2018.05.248 ↗
24. Retracted: Predicting the compressive strength of modified recycled aggregate concrete10.1002/suco.202100681 ↗
25. An investigation on mechanical properties and durability of metakaolin reinforced modified recycled concrete
26. Improvement of recycled aggregate concrete using glass fiber and silica fume
27. Microstructure and physical properties of concrete containing recycled aggregates pre-treated by a nano-silica soaking method
28. Effects of nanoparticle on the dynamic behaviors of recycled aggregate concrete under impact loading10.1016/j.matdes.2016.09.045 ↗
29. Properties of recycled coarse aggregate concrete modified by silica nanoparticles: a short review
30. Improvement in corrosion resistance of recycled aggregate concrete by nano silica suspension modification on recycled aggregates10.1016/j.cemconcomp.2019.103476 ↗
31. Mechanical features and durability of concrete incorporating recycled coarse aggregate and nano-silica: experimental study, prediction, and optimization
32. The role of internally incorporated nano-silica in recycled aggregate concrete: modification of transport properties10.1016/j.conbuildmat.2023.130790 ↗
33. The effect of nanosilica addition on flowability, strength and transport properties of ultra high performance concrete10.1016/j.matdes.2014.02.051 ↗
34. A study on the effect of nano silica on compressive strength of high volume fly ash mortars and concretes10.1016/j.matdes.2014.04.025 ↗
35. Experimental study on nano-SiO2 improving concrete durability of bridge deck pavement in cold regions
36. Frost resistance of concrete mixed with nano-silica in severely cold regions
37. Empirical estimation of pore size distribution in cement, mortar, and concrete10.1061/(ASCE)MT.1943-5533.0000945 ↗
38. Multi-scale simulation of freeze-thaw damage to RC column and its restoring force characteristics10.1016/j.engstruct.2017.11.066 ↗
39. Influence of air-entraining agent and freeze-thaw action on pore structure in high-strength concrete by using CT-Scan technology10.1016/j.coldregions.2021.103397 ↗
40. Innovative prediction models for the frost durability of recycled aggregate concrete using soft computing methods
41. Effect of air entraining agent on capillary water absorption of mortar before and after freeze-thaw cycle
42. Freeze-thaw durability of concrete with natural and recycled concrete aggregates using air-entraining admixture10.1520/ACEM20170079 ↗
43. Investigation of microstructural damage in air-entrained recycled concrete under a freeze–thaw environment10.1016/j.conbuildmat.2020.121219 ↗
44. GB/T25177-2010. Recycled Coarse Aggregate for Concrete. State Standard of the People's Republic of China, Beijing, China, 2010.
45. GB/T 50081-2019. Standard for Test Method of Concrete Physical and Mechanical Properties. China Architecture and Building Press, Beijing, China, 2019.
46. GB/T 50082-2009. Standard for Test Method of Long-term Performance and Durability of Ordinary Concrete. China Architecture and Building Press, Beijing, China, 2010.
47. Influence of Ground Pumice on Compressive Strength and Air Content of Both Non-air and Air Entrained Concrete in Fresh and Hardened State10.1016/j.conbuildmat.2018.07.183 ↗
48. Effects of admixtures and air entraining agent on performance of concrete
49. Effect of air entrainment on the mechanical properties, chloride migration, and microstructure of ordinary concrete and fly ash concrete10.1061/(ASCE)MT.1943-5533.0002456 ↗
50. Impact analysis of air-entraining and superplasticizing admixtures on concrete compressive strength
51. Air entrainment in fresh concrete and its effects on hardened concrete-a review10.1016/j.conbuildmat.2020.121835 ↗
52. Ultrasonic techniques for air void size distribution and property evaluation in both early-age and hardened concrete samples10.3390/app7030290 ↗
53. Effects of surface states on salt-frost scaling resistance of cement concrete
54. Revisiting concrete frost salt scaling: on the role of the frozen salt solution micro-structure10.1016/j.cemconres.2022.106803 ↗
55. Freeze-thaw durability of recycled aggregate concrete: an overview10.1007/s11595-021-2378-x ↗
56. Modeling of water transport in highly saturated concrete with wet surface during freeze/thaw10.1016/j.cemconres.2018.08.013 ↗
57. Lifetime assessment of structural concrete–multi-scale integrated hygro-thermal-chemo-electrical-mechanistic approach and statistical evaluation10.1080/15732479.2021.1995443 ↗
58. Quantifying fluid filling of the air voids in air entrained concrete using neutron radiography
59. A review of the impact of micro- and nanoparticles on freeze-thaw durability of hardened concrete: mechanism perspective10.1016/j.conbuildmat.2018.08.029 ↗
60. Water absorption and chloride diffusivity of concrete under the coupling effect of uniaxial compressive load and freeze–thaw cycles.10.1016/j.conbuildmat.2019.03.091 ↗
61. Water transport in recycled aggregate concrete under sustained compressive loading: experimental investigation and mesoscale numerical modelling
62. Using neutron radiography to assess water absorption in air entrained mortar10.1016/j.conbuildmat.2016.02.001 ↗
63. A recycling approach of natural stone from crushed concrete based on freeze-thaw modification and usage of spalling mortar as recycled fine aggregate10.1016/j.conbuildmat.2024.135287 ↗
64. RBSM-based mesoscale study of mechanical properties and frost damage behaviors for recycled fine aggregate concrete10.1016/j.conbuildmat.2024.135136 ↗
65. Effect of loading-induced damage on chloride ingress behavior of recycled aggregate concrete: a comprehensive review10.1016/j.cemconcomp.2023.105123 ↗
66. Experimental investigation on the impact properties and microstructure of recycled steel fiber and silica fume reinforced recycled aggregate concrete