To determine the weight of sand in the lower cylinder of the sand cylinder - Master's thesis - Dissertation

Probe domestic switch needle KG-300K needle head diameter is 3.0mm normally open switch needle

Memory chip

product name:

Sanding cylinder

-

Site weight measuring instrument

Used to determine the density and compaction of roadbed, pavement (sand); Specifications:

Ф100

,

Ф150

Plastic sanding cylinder,

Ф150

,

Ф200

;

Determine the weight of the sand in the lower cylinder of the sand cylinder, the steps are as follows

:

1

Filling the sand cartridge with sand, the height of the sand in the cylinder is not more than the distance from the top of the cylinder

15mm

, weighing the weight of the sand in the cylinder, it is difficult to

1g(m)

This weight should be maintained for each calibration and subsequent tests.

2

Open the switch, let the sand flow out, and make the volume of the discharged sand equal to the burrow of the test hole in the construction site.

(

Or equal to the volume of the calibration tank

)

Then, turn off the switch, and when the weighing cylinder is no longer flowing down, close the switch and carefully remove the sanding cylinder.

3

,

Collect and weigh the sand left on the glass plate, accurate to

Lg

This sand is the sand that fills the lower cone of the sand.

4

,

Repeat the above measurements at least three times, and finally take the average position, accurate to

1g(m)

. Determine the unit weight of the sand:

(g

/cubic centimeter

)

The steps are as follows:

A

Determine the volume of the calibration tank with water

V(

Cubic centimeter

)

.

B

, the weight in the sand cartridge is

M1

Sand and place the sanding cylinder on the calibration tank, open the switch and let the sand flow out

(

Do not touch the sand filling cylinder during the entire grit

)

Until the sand in the sand storage tank is no longer flowing down, close the switch and remove the tank sand tube, and weigh the remaining sand in the cylinder to the exact

1g

, repeat the above measurement at least three times, then take the average and push it to

g(m)

. Calculate the weight required to fill the calibration tank by the following formula

m.(

Please see the instructions included with the instrument.

)

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