Carrying ratio tester safe use method - Database & Sql Blog Articles

Bearing ratio tester

product manual

one,

[

Product introduction

]

It is used to test the bearing ratio of various soil and pavement base and bottom materials after the parts are manufactured in the specified test tube. The maximum particle size of the mixture should be controlled at

25mm

Within, the maximum does not exceed

40mm

,

It is one of the necessary instruments for geotechnical testing.

two,

Bearing ratio tester

Instructions

1

Turn on the power switch, operate the instrument, check whether the working condition of the instrument is normal, check whether the handle is in and out, and whether the rotation is normal. If everything is normal, you can start to test.

2

According to the "Testing Regulations for Base Course Materials for Highway Pavement"

JTJ075-85

The bearing ratio test method was used to prepare the test piece.

3

, measuring the amount of saturated water:

A

Place the moisture-prevented test piece on the perforated plate equipped with the adjustment rod, and add enough load plate on the plate so that the pressure on the test piece surface is equal to the pressure on the road surface of the material layer.

B

Place the test tube together with the perforated plate in the water tank (without draining water) and tighten the mold with a tie rod, install the dial indicator, and read the initial reading.

C

Water is released into the water tank to allow free access to the top of the test piece. During the saturated water period, the water in the tank should be kept above the top surface of the test piece.

25mm

Usually the test piece should be soaked

96

hour,

D

When the watering time is up, read the dial gauge reading and calculate the amount of expansion.

AV=

Change in height of test piece after soaking

/

Original test piece is high (

120mm

)

×100%

E

Remove the sample from the water tank, pour the water from the sample, and let it stand.

15

Minutes to drain and then remove additional loads and perforated plates, bottom plates and filter paper, and load bearing

M

To calculate the change in depth and density of the test piece.

4

, penetration test:

A

The test piece at the end of the saturated water test is placed on the tester lifting plate, the penetration rod is adjusted to be centered with the force measuring ring, and a predetermined number of load plates are placed around the penetration rod.

B

First, apply the penetration rod to the hand wheel

45N

Load, then adjust the force ring, the measured dialometer to zero.

C

Load the handwheel and record some readings of the force dial

20

,

40.....

) the amount of penetration, and pay attention to the amount of penetration

2.5mm

,can have

8

For each of the above readings, the total penetration is

2.5

,

50mm

Time bearing ratio:

Carry ratio

C=

Unit pressure

/7

or

10.5×100%

Our similar products also have:

Plate load tester

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Pavement deflection instrument

Carrying ratio analyzer

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WTZF-1

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-

Site weight measuring instrument

LXBP-5

Continuous pavement flatness meter

Pavement structure depth tester