Rapid detection method for coal gangue aggregate weathering in service state and application thereof

A service status and detection method technology, applied in the direction of measuring devices, analysis materials, climate sustainability, etc., can solve the problems of adverse impacts on the ecological environment, occupation of cultivated land, etc., to avoid performance degradation, relieve stockpiling pressure, and simplify the work process Effect

Pending Publication Date: 2022-05-31
WUHAN UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the gangue dump formed by a large amount of coal gangue stacked in the open air occupies a large amount of cultivated land; 2 , SO 2 and NO X etc., causing adverse effects on the ecological environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rapid detection method for coal gangue aggregate weathering in service state and application thereof
  • Rapid detection method for coal gangue aggregate weathering in service state and application thereof
  • Rapid detection method for coal gangue aggregate weathering in service state and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, the cement slurry is used to wrap the coal gangue aggregate to simulate the service state of the coal gangue aggregate in the concrete or semi-rigid base material, and it is cured for 14 days, and the cement is fully hydrated through curing, so as to simulate the condition of being in the concrete and semi-rigid base material. The service status of coal gangue aggregates in the material. Among them: the coal gangue aggregate used is coarse coal gangue aggregate, the particle size is 9.5-13.2mm, and the mass of each group is 3000g; the cement used in the cement slurry is P.O42.5 cement, the water-cement ratio is 0.45, and artificial mixing is adopted. method, the cement slurry is evenly wrapped on the surface of each coal gangue aggregate to form a thin layer no more than 0.5mm.

[0028] The weathering conditions of ordinary coal gangue aggregates and coal gangue aggregates wrapped with cement slurry were evaluated according to the following steps:

[0...

Embodiment 2

[0040] This example is the same as Example 1, except that three groups of ordinary coal gangue aggregates and coal gangue aggregates wrapped with cement slurry are taken out, and subjected to accelerated weathering treatment at a temperature of 50°C for 7 days, 14 days, 21 days and 28 days, and numbered as coal gangue E, coal gangue F, coal gangue G and coal gangue H.

[0041] The crushing values ​​of coal gangue aggregates in different states obtained in this example are shown in Table 3 below.

[0042] Table 3 Coal gangue crushing value before and after weathering treatment

[0043]

[0044] The change of crushing value of ordinary coal gangue aggregate and coal gangue aggregate wrapped with cement slurry in each group after weathering is as follows: coal gangue E increases by 3.8% and 6.4% respectively; coal gangue F increases by 6.7% and 8.9% respectively %; coal gangue F increased by 9.3% and 11.3% respectively; coal gangue H increased by 9.4% and 11.5% respectively. ...

Embodiment 3

[0049] In this example, the coal gangue aggregate is wrapped with an asphalt binder to simulate the service state of the coal gangue aggregate in the asphalt mixture, and the asphalt binder used is petroleum asphalt.

[0050] The weathering of coal gangue aggregates wrapped with ordinary coal gangue aggregates and asphalt binders was evaluated according to the following steps:

[0051] Step 1: Detect the crushing value of ordinary coal gangue aggregate without weathering treatment and the crushing value of coal gangue aggregate wrapped with asphalt binder.

[0052] Step 2: The ordinary coal gangue aggregate and the coal gangue aggregate wrapped with the asphalt binder are subjected to accelerated weathering treatment at 70° C. for a total of 20 days.

[0053] Step 3: Detect the crushing value of the weathered ordinary coal gangue aggregate and the crushing value of the coal gangue aggregate wrapped with the asphalt binder.

[0054] The crushing value of the unweathered ordina...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
softening pointaaaaaaaaaa
flash pointaaaaaaaaaa
Login to view more

Abstract

The invention discloses a rapid detection method for coal gangue aggregate weathering in a service state and application of the rapid detection method. Comprising the following steps that coal gangue aggregate is wrapped with cement paste and cured for 14-28 days, and the service state of the coal gangue aggregate in concrete or a semi-rigid base material is simulated; or wrapping the coal gangue aggregate with an asphalt binder to simulate the service state of the coal gangue aggregate in the asphalt mixture; then placing in water at the temperature of 20-90 DEG C for 7-28 days, accelerating weathering, and detecting a crushing value; and comparing and analyzing with the requirement on the crushing value of the aggregate in the related standard, and judging the actual application scene of the coal gangue aggregate. According to the method, a basis is provided for judging whether the coal gangue is suitable for concrete, a pavement base layer or an asphalt pavement mixture or not, performance reduction caused by weathering of the coal gangue aggregate in the service process is effectively avoided, reasonable application of the coal gangue is achieved, and the discharging and stockpiling pressure of the coal gangue is relieved.

Description

technical field [0001] The invention relates to a rapid detection method for weathering of coal gangue aggregates in service state and its application. Background technique [0002] Coal gangue is generally black and hard solid waste produced in the process of coal mining and coal washing. On the one hand, the gangue hills formed by a large amount of coal gangue piled up in the open occupy a large amount of cultivated land. 2 , SO 2 and NO X and so on, causing adverse effects on the ecological environment. Coal gangue is rich in silicon-alumina oxide and easy to weather. The utilization of coal gangue as the aggregate of concrete, semi-rigid base material and asphalt mixture can absorb a large amount of coal gangue and relieve its discharge pressure. [0003] Because coal gangue is easily weathered, and weathering will cause deterioration of its physical and chemical properties. When coal gangue is used as an aggregate for concrete, semi-rigid base materials and asphal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00Y02W30/91
Inventor 陈潇杜新宇张嘉琛周明凯
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap