Study on the Durability of Concrete under an Underwater Coupling Environment

Table 5

Accelerated test system of pile foundation concrete.

Evaluation cycle (d)	Curing time (d)	Corrosion days (d)	Soaking solution	Mechanism of dry-wet cycle	Drying temperature (°C)	Soaking temperature (°C)	Evaluating indicator
44	14	30	10% Na2SO4	Soak 12 h, dry 12 h	65	25	The compressive strength (corrosion resistance coefficient) and weight loss rate of specimens were calculated after 10, 20, and 30 corrosion cycles
88	28	60	10% Na2SO4	Soak 12 h, dry 12 h	40	15
176	56	120	5% Na2SO4	Soak 16 h; Dry 6 h	80	20