Strength characteristics of cement-reinforced recycled aggregate modified with nano-MgO as road bases
Source abstract
Abstract
In order to study the influence of nano-MgO on the strength characteristics of cement-reinforced waste road recycled aggregate (CRA), the California bearing ratio (CBR) test, unconfined compressive strength (UCS) test, scanning electron microscope (SEM) test, X-ray energy dispersive spectroscopy (EDS) test and X-ray diffraction (XRD) test were carried out. In the test of using nano-MgO modified cement-reinforced waste road recycled aggregates (MCRA), the cement content was fixed at 4 %, considering the two ages of 7 d and 28 d and the four types of nano-MgO content. The mechanical test results show that the addition of nano-MgO has a certain effect of improving mechanical properties; The CBR values of MCRA specimens with nano-MgO all meet the requirements of extremely heavy and extremely heavy traffic levels of expressways and first-class highways; The unconfined compressive strength of 0.4 %MCRA can meet the heavy traffic grade requirements of expressways and first-class highways; 0.4 % is the optimum dosage of nano-MgO; The bivariate quadratic polynomial mathematical models of CBR value and unconfined compressive strength of MCRA specimens with nano-MgO content and age were established by curve fitting, and the fitting effect was ideal. Finally, the microscopic test was used to further analyze the internal mechanism of nano-MgO enhancing the strength of CRA.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Innovative concrete reinforcement materials · Concrete and Cement Materials Research · Recycled Aggregate Concrete Performance
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (51)
Show source-provided references
1. Design and performance test of construction waste recycled mixture ratio
2. Research on homogeneity evaluation and control technology of recycled coarse aggregate for cement stabilized base course
3. Primary yielding locus of cement-stabilized marine clay and its applications10.1080/1064119X.2017.1422162 ↗
4. Experimental research on mechanical characteristics of reproductive concrete
5. Effects of gradation, composition, and degree of compaction on the mechanical characteristics of recycled unbound materials10.3141/1787-08 ↗
6. Feasible use of recycled concrete aggregates and crushed clay brick as unbound road sub-base10.1016/j.conbuildmat.2005.01.045 ↗
7. Study on performance of construction and demolition waste recycled aggregates base mixture
8. Geotechnical properties of blends of recycled clay masonry and recycled concrete aggregates in unbound pavement construction10.1061/(ASCE)MT.1943-5533.0000634 ↗
9. Research on performances of cement stabilized brick and concrete recycled aggregate base
10. C. Wu, J. Xiao, Z. Tian, S. Wan, J. Zhang, Mechanical properties and pavement structure of cement stabilized recycled brick and concrete aggregate base, Bull. Chin. Ceram. Soc., vol. 36(no. S1), 2017, pp. S158–64.
11. Use of scrap concrete materials in semi-rigid base-course
12. Resilient response of recycled concrete road aggregates10.1061/(ASCE)0733-947X(2001)127:5(450) ↗
13. Research and application of recycled concrete aggregate for cement stabilized gravel
14. Fatigue behavior of fiber-reinforced recycled aggregate base course10.1061/(ASCE)0899-1561(1999)11:2(124) ↗
15. Mechanical properties and micro mechanism of nano-SiO2 modified coastal cement soil at short age
16. Effect of nano-SiO2 on steel slag/cement-based cementitious materials
17. Stabilization of residual soil using SiO2 nanoparticles and cement10.1016/j.conbuildmat.2014.04.086 ↗
18. Exploring the potential of siloxane surface modified nano-SiO2 to improve the Portland cement pastes hydration properties10.1016/j.conbuildmat.2013.12.028 ↗
19. Improving the performance of cement-based composites containing superabsorbent polymers by utilization of nano-SiO2 particles10.1016/j.matdes.2012.05.030 ↗
20. Evaluation of cement performance using industrial byproducts such as nano MgO and fly ash from Greece10.3390/app112411601 ↗
21. Effect of nano-magnesium oxide on the expansion performance and hydration process of cement-based materials10.3390/ma14133766 ↗
22. Study on the shear property of nano-MgO-modified soil10.1080/1064119X.2017.1335813 ↗
23. Experimental study on dynamic properties of nano-MgO-modified silty clay10.1007/s40891-020-00210-5 ↗
24. Experimental study of nanometer magnesium oxide-modified clay10.1007/s11204-015-9331-y ↗
25. Investigation on strength and microstructure characteristics of nano-MgO admixed with cemented soft soil10.1016/j.conbuildmat.2019.01.221 ↗
26. Strength parameters of stabilized clay using polypropylene fibers and Nano-MgO: an experimental study10.1007/s10706-020-01191-y ↗
27. Effect of nano-modification and fiber-reinforcement on mechanical behavior of cement-stabilized dredged sediment10.1080/1064119X.2021.1954112 ↗
28. Triaxial mechanical properties and mechanism of waterborne polyurethane-reinforced road demolition waste as road bases10.3390/polym14132725 ↗
29. Ministry of Transport of the People's Republic of China, Test Methods of Materials Stabilized with Inorganic Binders for Highway Engineering, JTG E51-2002729, 2009.
30. Ministry of Transport of the People's Republic of China, Test Methods of Aggregate for Highway Engineering, T0305-1994, 1994.
31. Ministry of Transport of the People's Republic of China, Technical Guidelines for Construction of Highway Roadbases, JTG/T F20-2015, 2015.
32. Ministry of Housing and Urban-Rural Development of the People's Republic of China, Standard for Geotechnical Testing Method, GB/T 50123-2019, 2019.
33. Brittleness evaluation of coral reef limestone base on stress-strain curve
34. Quantitative evaluation of rock brittleness based on stress-strain curve
35. Evaluation method of brittle characteristics of rock based on full stress-strain curve and crack initiation stress
36. Mechanical properties of nano-silica and lime stabilized silt reinforced by fiber
37. Experimental investigations on the mechanical and microscopic behavior of cement-treated clay modified by nano-MgO and fibers10.1061/(ASCE)GM.1943-5622.0002376 ↗
38. Investigation of the hydration and bioactivity of radiopacified tricalcium silicate cement, Biodentine and MTA Angelus10.1016/j.dental.2013.03.007 ↗
39. Effects of nano and micro size of CaO and MgO, nano-clay and expanded perlite aggregate on the autogenous shrinkage of mortar10.1016/j.conbuildmat.2015.02.032 ↗
40. Experimental study on microstructure and mechanical properties of seabed soft soil from South China Sea
41. Effect of limestone powder in manufactured sand on the hydration products and microstructure of recycled aggregate concrete10.1016/j.conbuildmat.2018.08.147 ↗
42. Effects of MgO-based expansive additive on compensating the shrinkage of cement paste under non-wet curing conditions10.1016/j.cemconcomp.2011.11.018 ↗
43. The effects of nanoscale expansive agents on the mechanical properties of non-shrink cement-based composites: the influence of nano-MgO addition10.1016/j.compositesb.2013.06.033 ↗
44. The influence of MgO-type expansive agent incorporated in self-healing system of engineered cementitious composites10.1016/j.conbuildmat.2017.05.109 ↗
45. MgO expansive cement and concrete in China: past, present and future10.1016/j.cemconres.2013.12.007 ↗
46. Self-healing and expansion characteristics of cementitious composites with high volume fly ash and MgO-type expansive agent10.1016/j.conbuildmat.2016.09.125 ↗
47. Compaction and mechanical characteristics and stabilization mechanism of carbonated reactive MgO-stabilized silt10.1007/s12205-017-1145-1 ↗
48. Mechanical properties of concrete with light burnt MgO-based expansive additive under different restrained conditions
49. Expansion of ordinary Portland cement paste varied with nano-MgO10.1016/j.conbuildmat.2014.12.113 ↗
50. Production and characterization of magnesium oxychloride cement bricks for fine polishing of porcelain stoneware tiles
51. Compressive strength development and microstructure of magnesium phosphate cement concrete10.1016/j.conbuildmat.2021.122585 ↗