The concrete permeameter is a simple device that uses a sealed container and a pipeline system connected to it to maintain equal pressure at all points (ignoring water head), applies pressure with a water pump, and maintains the pressure within a specified range through an intelligent numerical control gauge for testing.

The concrete permeameter consists of a frame test mold, a separator, a water pump, a water storage tank, and electrical control. The structure and function of each part are described below.

1. Rack trial part

The rack is made of welded steel sections, with a 1.5mm thick steel plate tray laid on top. The test mold base tray is fixed to the bracket with M10 bolts, and the test mold is connected to the test mold base through M12 threads. The 'O' - shaped rubber ring in the middle serves as a sealing function. The test specimen is formed using a pig iron mold and encapsulated within the mold. The mold is tightened using a wrench.

2. Separators section:

The separator is a device that places valves and a return water shut-off valve in front of the instrument, mainly used to control the opening or closing of the water circuit for six specimens. The return water shut-off valve is used to reduce pressure.

3. Water pump section:

The water pump is powered by a 90 watt electric motor, which changes speed through two-stage gears to drive the eccentric shaft to rotate, and then drives the plunger to perform reciprocating motion through the guide column and connecting rod to work. Due to the small flow rate of the water pump, it can be approximately assumed that the water pressure supplied to the specimen is static.

4. A water storage tank is a container for storing water and can also be subjected to direct pressure reduction impact. Before the test, a funnel is used to inject water into the water storage tank through a water injection nozzle. After the test is completed, the water in the tank is drained through a water discharge nozzle.