Measuring device and method for saturated surface dry water absorption of sandstone aggregate

A technology of measuring device and measuring method, which is applied in the field of civil engineering to achieve the effect of high accuracy of test results and high degree of automation

Pending Publication Date: 2020-01-31
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for measuring the dry water absorpt...

Method used

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  • Measuring device and method for saturated surface dry water absorption of sandstone aggregate
  • Measuring device and method for saturated surface dry water absorption of sandstone aggregate
  • Measuring device and method for saturated surface dry water absorption of sandstone aggregate

Examples

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Embodiment 1

[0030] Such as figure 1 As shown, in this embodiment, a device for measuring dry water absorption of the saturated surface of sand and gravel aggregate is provided, and the device for measuring includes a temperature and humidity control box 1, an automatic collection and recording device 3, a host computer 4, an electronic balance 2 and a sample tray 5; the top of the temperature and humidity control box 1 is provided with a through hole 7 communicating with the inside and the outside, the sample tray 5 is connected to the electronic balance 2 via a stay rope 6, and the stay rope 6 passes through the through hole 7 Hang the sample tray 5 inside the temperature and humidity control box 1, the electronic balance 2 is connected to the automatic collection and recording device 3, and the automatic collection and recording device 3 is connected to the host computer 4.

[0031] In this embodiment, the bottom of the electronic balance 2 has a hook, and the end of the drawstring 6 aw...

Embodiment 2

[0039] Such as figure 2 As shown, a method for measuring dry water absorption of sand and gravel aggregate saturated surface is provided in this embodiment, and the measurement method is realized by using a measurement device; the measurement method includes the following steps,

[0040] S1. Take an appropriate amount of sand and put it into a pretreatment container, inject clean water into the pretreatment container, so that the water surface is 2cm higher than the sand; and soak the sand in clean water for 24 hours, and keep the indoor temperature at 20°C;

[0041] S2, start the temperature and humidity control box 1, and control the temperature in the temperature and humidity control box 1 to be 10-80°C, and the relative humidity to be 10%-80%; open the electronic balance 2, and use the drawstring 6 to place the sample The dish 5 is hung on the hook of the electronic balance 2, and the electronic balance 2 is cleared;

[0042] S3. After the sand is soaked for 24 hours, po...

Embodiment 3

[0053] Such as Figure 3 to Figure 5 As shown, in this example, the sand used is limestone artificial sand, which is measured according to the measuring device in Example 1 and the measuring method in Example 2, and the measuring results are shown in Table 1. The dry water absorption of the sand saturated surface of this embodiment was measured according to the method for measuring the dry water absorption of the saturated surface of the sand (trial method) stipulated in the current national standard, and the results are shown in Table 1.

[0054] In this example, the sand used is natural river sand, which was measured according to the measuring device in Example 1 and the measuring method in Example 2, and the measuring results are shown in Table 1. The dry water absorption of the sand saturated surface of this embodiment was measured according to the method for measuring the dry water absorption of the saturated surface of the sand (trial method) stipulated in the current na...

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Abstract

The invention discloses a measuring device and method for saturated surface dry water absorption of sandstone aggregate. The measuring device comprises a temperature and humidity control box, an automatic collecting and recording device, an upper computer, an electronic balance and a sample disc. A through hole for communicating the interior of the temperature and humidity control box with the outside is formed in the top of the temperature and humidity control box, the sample disc is connected with the electronic balance through a pull rope, the pull rope penetrates through the through hole to hang the sample disc in the temperature and humidity control box, the electronic balance is connected with the automatic collecting and recording device, and the automatic collecting and recording device is connected with the upper computer. The measuring device and method have the advantages that the sand saturated surface dry state can be accurately determined, the automation degree is high, the influence of operators is avoided, and the test result accuracy is high.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a device and method for measuring the dry water absorption rate of the saturated surface of sandstone aggregate. Background technique [0002] Dry water absorption at the saturated surface of sand and gravel is an important reference parameter for evaluating the quality characteristics of concrete aggregates and the design of concrete mix proportions. The saturated surface dry state refers to the state in which the pores in the sand and gravel particles that can be penetrated by water are all filled with water, but there is no free water on the surface of the particles. [0003] At present, there are mold test method and wet trace method for measuring the dry water absorption of the saturated surface of sand and gravel. Since the dry state of the saturated surface of sand and gravel is a critical state, it is not easy to judge and easy to miss. The existing measurement ...

Claims

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Application Information

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IPC IPC(8): G01N5/02
CPCG01N5/025
Inventor 孔祥芝陈改新纪国晋吴葵张思佳刘晨霞计涛李蓉
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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