GB/T32987-2016Test device for permeability of concrete pavement bricks

1Test equipment

Take away the inner diameter of the scale60mm+2mmThe transparent glass round measuring cylinder,high300mmabove

One end of the transparent glass cylinder is connected to the surface of the sample and sealed,image9Provide a schematic diagram of the device.

2Sample size

Sample size3a

3Experimental steps

3.1Stand the sample laterally upright in the water tank,The interval between samples shall not be less than20mm,Inject temperature

The degree is10C~30CThe water,During the banquet, the water surface should be about higher than the sample20mmSleeping bubbles24

h,Remove the sample from the water,Use a sponge or a wrung out wet towel to wipe off any surface water.

3.2Align the sample with the7.1Connect the glass cylinder to seal the outer edge of the bottom of the glass cylinder where it meets the sample.

3.3Inject temperature into the glass cylinder10-30Degree of water,In1minRound the glass inside

Add water to the measuring cylinder until200mmHigh.

3.4record120minChange in water surface position,According to the formula(4)Calculate permeability;as120minThe inner water level drops more than100mm,Record the decrease in water level100mmThe time used for time is calculated according to the formula(4)Calculate permeability

3.4record120minChange in water surface positionA,According to the formula(4)Calculate permeability;

as120minThe inner water level drops more than100mm,then

Record the descent of water surface100mmThe time used for timehAccording to the formula(4)Calculate permeability

4Result Calculation

Permeability according to the formula(4)calculate:

P=~…………………….（4）

t

in the formula:

P--Permeability,The unit is millimeters per minute(mm/min);

hChange in water surface position,Unit in millimeters(mm);