The elastic modulus of natural aggregates is significantly positively correlated with the elastic modulus and peak stress of recycled aggregate concrete (MRAC), and weakly negatively correlated with the peak strain.
The natural aggregate modulus increased from 30.
8 GPa to 83.
3 GPa, the elastic modulus increased by 38.
4%, and the peak stress increased by 11.
4%.
High modulus natural aggregates bear more loads and reduce system deformation, which is the fundamental factor in improving the stiffness of recycled concrete.
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