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A kind of preparation method of sensory plastic geogrid

A geogrid and sensor-type technology, applied in the field of civil engineering, can solve the problems of inability to strengthen the detection of solid deformation information, increase the difficulty and cost of detection, single reinforcement effect, etc., and achieve the effect of avoiding the decline in the accuracy of deformation testing

Active Publication Date: 2016-02-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current geogrid products only have a single reinforcement effect, and cannot detect the deformation information of the reinforced body. If it is detected, other equipment is required, which increases the difficulty and cost of detection.

Method used

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  • A kind of preparation method of sensory plastic geogrid
  • A kind of preparation method of sensory plastic geogrid
  • A kind of preparation method of sensory plastic geogrid

Examples

Experimental program
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preparation example Construction

[0033] The preparation method of the sensor type plastic geogrid of the present invention has the following steps:

[0034] (1) Determination of filling amount of superconducting carbon black

[0035] In order to obtain the required composite material, the composite material is developed in an experimental way in the room. The high-density polyethylene is selected as the base material, and the conductive masterbatch with superconductive carbon black is used as the filler, and the conductive masterbatch accounts for the mass of the mixture. Melt and mix the two in the range of 40% to 60%. After plasticizing and extruding, they are cooled and pelletized to obtain a conductive composite material. In order to ensure the uniformity of the composite material, it is mixed and plasticized for multiple times. Granulate to obtain the required composite material for use.

[0036] (2) Calibration of smart polymer deformation-resistance relationship

[0037] Conducting a tensile test of conductiv...

example 1

[0044] Example 1: Preparation of sensing plastic geogrid for road

[0045] In road engineering, the geogrid is mainly used to reinforce the soil and prevent settlement. In order to prepare a sensor-type plastic geogrid suitable for roads, a conductive composite material with a filler ratio of 45% is selected (its normalized resistivity and strain The relation is Such as Figure 5 (Shown), the production process of the composite material of this ratio is as follows: the base material HDPE and superconducting carbon black masterbatch are prepared and mixed according to the mass ratio; the mixture of the two is melted and extruded through an extruder, and then pelletized after cooling. The high-density polyethylene composite material is obtained. In order to ensure the uniformity of the carbon black in the composite material, the prepared composite material particles are remelted and re-granulated, and the re-granulation process is repeated twice to obtain a composite material with ...

example 2

[0046] Example 2: Preparation of sensing plastic geogrid for mine

[0047] In mine production operations, the stability and firmness of the roadway is the guarantee of safe production. In order to reinforce the roadway, the method of burying geogrid is usually used, which not only improves the robustness of the roadway, but also reduces the construction cost. But even so, due to the effect of confining pressure and other factors, the roadway wall will still be deformed and destroyed, or even collapsed, causing loss of life and property. If special equipment is used for regular inspection, it will be time-consuming and labor-intensive and inconvenient to operate. The above problems can now be solved by laying a sensor-type geogrid. The composite conductive high-density polyethylene composite material (carbon black is conductive filler) with a filler mass ratio of 48% is selected as the raw material (the normalized resistivity and strain relationship is Ω Ω 0 = ϵ ...

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Abstract

The invention discloses a method for preparing sensing type plastic geogrids. The method comprises the following steps: step (1) manufacturing a conductive composite material by selecting high density polyethylene as a base material and conductive master-batches to which super conductive carbon black is added as padding; step (2) conducting a tensile test on the conductive composite material indoors, and determining the relationship between the deformation and resistance variation of the conductive composite material; step (3) preparing sensing type grids by utilizing the conductive composite material; and step (4) determining the net type of the sensing type grids, namely adding regular hexagonal additional bars on parallel main bar columns of the sensing type grids. By utilizing the pulling sensitive characteristic of conductive plastic, the deformation information of the geogrids is obtained by testing the resistance of the grids, a sensor does not need to be buried in a soil body, and thus the phenomena that the deformation test precision is reduced due to the implantation of the external sensor and the durability of the sensor cannot meet requirements are avoided.

Description

Technical field [0001] The invention provides a method for preparing a sensing plastic geogrid added with superconducting carbon black, which belongs to the field of civil engineering. Background technique [0002] Reinforced soil structure series products are widely used in road engineering, water conservancy engineering, and mining engineering due to their advantages of economy, beauty, earthquake resistance, durability and ease of construction. The development and use of geosynthetics has a history of decades. High-performance raw materials give geotechnical products high strength and durability. At the same time, studies have shown that the use of geosynthetics in engineering requires an increase of 1% to 2% of the original investment, and under the same design standard, it can be reduced by 20% to 40 % Of the project cost, the economic benefits are very significant, the geogrid is a typical representative of the series of reinforced soil structure products. However, the cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D28/00E02D3/00E02D1/00
Inventor 崔新壮隋伟张炯汤潍泽楼俊杰高智珺
Owner SHANDONG UNIV
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