Abrupt drops in flexural strength after peak moment were observed with subsequent stiffness degradation and pinching of the moment-rotation response associated with straightening of buckling deformations during loading direction reversals.
That being said magnetic fields drop in strength very rapidly, ~1/ r3) with distance from the magnet.
For series B ternary concretes, the porosity is more significant with coarse aggregates, which explains the drop in strength.
Similarly, LMM specimens with different CNTs contents exhibited similar drop in strength after the first 150 cycles.
The drop in strength in the first 150 cycles could be attributed to the early development of microcracks due to the exposure to freeze thaw cycles, which in turn reduced the compressive strength.
The trend was different for the 50 % RAP mixes, the addition of fly ash resulted in the least drop in strength, while the addition of both fly ash and slag yielded the lowest strength.
A decrease in the amount of mixing water would partly mitigate this drop in strength and consequently improve the mechanical properties of the material because the water dosage is directly linked to the porosity of the concrete.
The addition of RAP to SCC, SCC-fly ash, SCC-slag, SCC-fly ash and slag showed a consistent effect, with a drop in strength after 3, 14, and 28 days as the RAP content increased from 0 to 50%%.
For all four cases the addition of RAP showed a consistent effect, with a drop in strength after 3, 14, and 28 days as the RAP content increased from 0 to 50%%.
To the left of Point C, even after the first failure of CF, the hybrid FRP with a relatively large amount of GF can sustain more loads without a drop in strength until the GF rupture.
