Theory 140/Concrete curing/Threshold lens
Porosity Needs a Water Threshold
The claim
Concrete becomes permeable above a threshold in the ratio of water to cement, so a small excess water produces a large loss of durability.
01Mechanism
Unreacted water leaves capillary pores; the ratio determines how connected they are.
02Prediction
Permeability should rise sharply above the threshold.
03Refutation
Permeability tracking strength would remove the ratio.