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Test device and method for measuring void ratio of stone chippings test sample and controlling void ratio of stone chippings test sample

A test device and porosity technology, which is applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems of uncontrollable stone chip porosity, poor operation convenience, small test range, etc., to achieve Accurate and reliable measurement results, convenient operation and simple overall structure

Pending Publication Date: 2019-07-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a test device and method for measuring the porosity of stone chip samples and controlling the porosity of stone chip samples. And the technical problem of not being able to control the porosity of stone chips

Method used

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  • Test device and method for measuring void ratio of stone chippings test sample and controlling void ratio of stone chippings test sample
  • Test device and method for measuring void ratio of stone chippings test sample and controlling void ratio of stone chippings test sample
  • Test device and method for measuring void ratio of stone chippings test sample and controlling void ratio of stone chippings test sample

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Embodiment 1

[0053] Such as figure 1 with figure 2 As shown, a test device for measuring the porosity of stone chip samples and controlling the porosity of stone chip samples includes a fixing frame, which consists of a base 1 and a top plate 2 and three uniformly fixed between the base and the top plate. Vertically arranged guide rods 3 are formed. A vertically telescopic hydraulic cylinder 4 is fixed in the center of the base. The cylinder body of the hydraulic cylinder is fixedly connected with the base. The piston rod end of the hydraulic cylinder is fixed with a horizontally arranged lower pressure plate 5 . A transparent sample cylinder 6 is installed above the first pressing plate among the three guide rods, and the sample cylinder is made of a transparent material, so that the filling height of the stone chip sample can be visually measured. The peripheral wall of the sample cylinder is provided with a height scale line 7 along the axial direction, which makes it more convenient ...

Embodiment 2

[0058] A method using a test apparatus for determining the porosity of stone chip samples, comprising the steps of:

[0059] (1) Sieve the test stone chips to obtain stone chip samples with different particle sizes, and weigh the particle size r 1 It is a 1.18mm stone chip sample with a mass of 3705.8g, and the sample cylinder is weighed as 2346.6g;

[0060] (2) Fix the sample cylinder 6 in step (1) on the mounting plate 9 through the connecting bolt 16, and remove the positioning bolts 11 on the two mounting plates so that the two mounting plates can go up and down along the guide rod 3 Sliding, first weigh 1235.27g of stone chip sample and fill it in the sample cylinder, control the extension of the piston rod of the hydraulic cylinder, and the hydraulic cylinder drives the sample cylinder to rise so that the upper platen moves downward relative to the sample cylinder and then squeezes The stone chip sample in the sample cylinder is made to compact the stone chip sample to ...

Embodiment 3

[0077] A method using a test apparatus for determining the porosity of stone chip samples, comprising the steps of:

[0078] (1) Sieve the test stone chips to obtain stone chip samples of different particle sizes, weigh the stone chip samples with a particle size of 1.18mm and a mass of 4453.0g, and record the weight of the sample cylinder as 2346.6g;

[0079] (2) Fix the sample cylinder 6 in step (1) on the mounting plate 9 through the connecting bolt 16, and remove the positioning bolts 11 on the two mounting plates so that the two mounting plates can slide up and down along the guide rod 3 , first weigh 1484.33g of stone chip sample and fill it in the sample cylinder, control the extension of the piston rod of the hydraulic cylinder, and the hydraulic cylinder drives the sample cylinder to rise so that the upper platen moves downward relative to the sample cylinder and then squeezes the test tube. The stone chip sample in the sample cylinder is made to compact the stone chi...

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Abstract

The invention relates to a test device and method for measuring a void ratio of a stone chippings test sample and controlling the void ratio of the stone chippings test sample. The test device comprises a fixed frame, wherein the fixed frame is composed of a base, a top plate and three vertical guide rods uniformly fixed between the base and the top plate; a hydraulic cylinder extending and retracting in a vertical direction is fixed in the center of the base; a lower pressing plate is fixed at the piston rod end of the hydraulic cylinder; a transparent test sample tube is mounted among the three guide rods; the test sample tube is mounted on the three guide rods through a mounting plate; an upper pressing plate is mounted on the bottom surface of the top plate; and a water injection holeand an exhaust hole are formed in the upper pressing plate. The test device can measure and control the void ratio of the stone chippings test sample, and test pieces predetermined heights under different void ratios are obtained; the test device can measure the void ratio and also can realize demolding, so that a dual-purpose device is implemented; furthermore, according to the method provided for controlling the void ratio, a void ratio model of stone chippings is built by using measured test data according to the statistics and is verified through R check , so that a measurement result is accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of porosity measurement, in particular to a test device and method for measuring the porosity of a stone chip sample and controlling the porosity of the stone chip sample. Background technique [0002] In the indoor pressure grouting penetration test, it is necessary to use the specimens of grouted stone chips with different void ratios for the test, and the specimens need to be demolded, so the measurement equipment and methods suitable for this test should be considered. There are many existing methods for testing porosity, mainly including gas adsorption method, mercury intrusion method, organic dissolution method, scanning electron microscope method, etc. These methods have small test range and poor operation convenience, not only low reuse rate, difficult demoulding, Moreover, the porosity of the stone chips cannot be controlled. Contents of the invention [0003] The technical problem to be solved b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N5/00
CPCG01N15/088G01N5/00
Inventor 李清富雷佳庞冠洪刘军磊闫亚倩孙杨项群华李朝政
Owner ZHENGZHOU UNIV
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