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Method for measuring apparent density and gas content of material

A technology of gas content and material table, which is applied in the field of measuring the apparent density and gas content of materials, and can solve problems such as inability to measure gas content at the same time, real-time monitoring, and complicated operation

Pending Publication Date: 2020-09-29
北京中建建筑科学研究院有限公司 +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For sand and gravel aggregates used in concrete, the volume is directly measured by the liquid drainage method, which is usually complicated to operate, and cannot be monitored in real time, nor can the air content be measured at the same time

Method used

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  • Method for measuring apparent density and gas content of material

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Embodiment Construction

[0023] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0024] Such as figure 1 Shown, according to the method for measuring material apparent density, gas content according to the embodiment of the present invention,

[0025] including measuring devices such as figure 1 As shown, the measuring device includes an air cylinder, a piston that is sealed and slidably connected in the air cylinder, a piston rod that drives the piston to operate, a material cylinder, and an air pressure detection device. The front end of the air cylinder can be sealed and connected to the material cylinder. The gas path is connected to the front end of the gas cylinder; it includes the following steps:

[0026] Step (1), calibrate the volume V of the barrel;

[0027] Step (2), block the fro...

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Abstract

The invention relates to a method for measuring apparent density and gas content of a material. The method comprises the following steps that the volume V of a material cylinder is calibrated; the front end of a gas cylinder is blocked, a piston is pushed to the foremost end, a piston rod is pulled, an air pressure detection device displays that the air pressure is 1 / 2 of the instant atmospheric pressure, air suction is stopped, and a zero point is calibrated; the material cylinder is filled with a material, the piston rod is pulled, the piston is pushed to the foremost end, the piston rod ispulled, the air pressure detection device displays that the air pressure is 1 / 2 of the instant atmospheric pressure, air suction is stopped, and the volume V1 of air in the material cylinder is measured; the weight M1 of the material in the material cylinder is weighed; and the apparent density of the material is calculated according to a formula of M1 / (V-V1), and the gas content of the material is calculated according to a formula of V1 / V*100%. According to the invention, the method is rapid in measurement, simple and easy to operate, and small in error.

Description

technical field [0001] The invention relates to the technical field of material apparent density and gas content, in particular to a method for measuring material apparent density and gas content. Background technique [0002] The apparent density of the material is the unit volume in the natural state. For materials with regular shapes, the volume can be measured directly; for materials with irregular shapes, the pores can be sealed by wax sealing, and then the volume can be measured by the drainage method; for sand used in concrete For stone aggregates, the volume is directly measured by the drainage method. The volume at this time is the sum of the solid volume and the closed pore volume, that is, the open pore volume connected to the outside is not included. [0003] Since sand and gravel are relatively dense, with few pores and less open pore volume, the density measured by the liquid drainage method is also called apparent density, which used to be called apparent dens...

Claims

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Application Information

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IPC IPC(8): G01N9/02G01F17/00G01N15/08
CPCG01N9/02G01F17/00G01N15/0893G01N2009/028
Inventor 胡志刚王长军王宪章曹光唐葆华许丹丹
Owner 北京中建建筑科学研究院有限公司
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