CN206540802U - A kind of device for being used to measure aggregate volume, unit weight and porosity - Google Patents

Abstract

The utility model relates to the field of volume measurement of soil aggregates, and provides a device for measuring the volume, bulk density and porosity of aggregates, including an electronic balance, a support and artificial fiber filaments for fixing the aggregates to be measured; The support includes a chassis and an L-shaped strut, one end of the L-shaped strut is fixed on the chassis, and the other end of the L-shaped strut is connected with rayon. The chassis utilizes its own weight to stand the whole support on the electronic balance. The utility model has the advantages of simple structure and convenient operation, can quickly and accurately measure the volume, bulk density and porosity of aggregates, and meets the measurement requirements of soil aggregates (10-2 mm in diameter).

Description

A device for measuring aggregate volume, bulk density and porosity

technical field

The utility model relates to the field of volume measurement of soil aggregates, in particular to a device for measuring the volume, bulk density and porosity of aggregates.

Background technique

Nowadays, the wax sealing method is usually used to measure the bulk density and porosity of various soil aggregates. The method is to heat the paraffin, then place the soil aggregates in the melted liquid paraffin to realize the waterproof treatment of the aggregates, and then use the drainage method to measure the volume of the aggregates. However, this method has certain limitations. First, it is difficult to control the temperature of the paraffin wax. The paraffin wax must be controlled at about 120 ° C. If the temperature is too high, it will easily catch fire, and if the temperature is low, it will not melt; It will cause a large error in the experiment, and the experiment process is more cumbersome.

Contents of the invention

The purpose of this utility model is to solve the deficiencies of the prior art and provide a device for measuring aggregate volume, bulk density and porosity, which has a simple structure and is easy to operate. Compared with traditional methods, it can simultaneously and more accurately measure Aggregate volume, bulk density and porosity.

In order to achieve the above object, the utility model adopts the following technical measures:

A device for measuring aggregate volume, bulk density and porosity, comprising an electronic balance, a support and artificial fiber filaments for fixing the measured aggregate; the support includes a chassis and an L-shaped pole, and the L-shaped pole One end of the rod is fixed on the chassis, and the other end of the L-shaped strut is connected with rayon. The chassis utilizes its own weight to stand the whole support on the electronic balance.

In the above technical solution, the support is placed on the electronic balance through the tray.

In the above technical solution, the electronic balance is a ten-thousandth electronic balance.

The utility model is a device for measuring the volume, bulk density and porosity of aggregates, which has simple structure and convenient operation, can quickly and accurately measure the volume, bulk density and porosity of aggregates, and meets the requirements of soil aggregates (diameter 10~2mm). Measurement requirements.

Description of drawings

Fig. 1 is the structural representation of the utility model device.

Figure 2 is a schematic view of the use of the device of the present invention.

Among them: 1. One ten-thousandth electronic scale; 2. Tray; 3. Chassis; 4. L-shaped pole; 5. Rayon; 6. Alkyd varnish after drying; 7. Sample;

detailed description

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

As shown in Figure 1, the present embodiment provides a device for measuring aggregate volume, bulk density and porosity, including an electronic scale 1 in 10,000, a tray 2, a support and an artificial support for fixing the aggregate to be measured. Fiber filament 5 ; the support includes a chassis 3 and an L-shaped strut 4 , one end of the L-shaped strut 4 is fixed on the chassis 3 , and the other end of the L-shaped strut 4 is connected to the rayon 5 . The support is placed on the 1/10,000 electronic balance 1 through the tray 5 .

As shown in Figure 2, when the device is used, the aggregate sample (hereinafter referred to as sample 7) wrapped with alkyd varnish 6 needs to be bound and fixed on the rayon 5, and a water tank is also required. 8 of 100ml beakers.

The specific measurement process of this device is as follows:

When it is necessary to measure the sample 7, first use an electronic balance to weigh it, and record it as m ₁ . Then sample 7 is bundled with rayon 5, immersed in the alkyd varnish, so that the surface is evenly covered with varnish, placed in the air at room temperature for 24 hours, until the alkyd varnish on the surface of sample 7 After complete drying, weigh the sample 7 coated with alkyd varnish and record it as m ₂ . Due to the extremely low weight of rayon filaments, it can be neglected here.

Place the support on the 1/10,000th electronic balance 1, then tie the rayon 5 bound with the sample 7 on the pole 4, and then set the 1/10,000th electronic balance 1 to zero. Immerse the sample 7 into a 100ml beaker 8 filled with water, record the reading after the electronic balance is stable and take its absolute value, and record it as m ₃ . Measure the temperature of the water used in the beaker and find the density ρ _w of the water at that temperature. Finally, the volume, bulk density and porosity of sample 7 were measured by calculation. Calculated as follows:

(1)

(2)

(3)

In the formula, V is the volume of the aggregate, cm ³ ; ρ is the bulk density of the aggregate, g/cm ³ ; m ₁ is the mass of a single particle of the aggregate, g; ρ _w is the density of water, g/cm ³ ; ρ _z is the density of alkyd varnish, g/cm ³ , ρ _z is 1.15 times of ρ _w ; m ₂ is the mass of agglomerate after treatment, g; m ₃ is the display reading of buoyancy on the electronic balance; ω is agglomeration The air-dried moisture content of the body; is the porosity of aggregates, %; ρ _s is the density of soil particles, generally taken as a constant of 2.65 g/cm ³ .

Claims (3)

1. a kind of device for being used to measure aggregate volume, unit weight and porosity, it is characterised in that：Including electronics Libra, bearing With the artificial cellosilk for fixed tested aggregate；The bearing includes chassis and L-type pole, and L-type pole one end is fixed on On chassis, L-type pole other end connection artificial cellosilk.

2. the device according to claim 1 for being used to measure aggregate volume, unit weight and porosity, it is characterised in that：Institute Bearing is stated to be positioned on electronics Libra by pallet.

3. the device according to claim 1 or 2 for being used to measure aggregate volume, unit weight and porosity, it is characterised in that： The electronics Libra is a ten thousandth electronics Libra.