Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method of improving swelling soil roadbed filling material by using waste carbide slag

A technology of carbide slag and soil roadbed, applied in the fields of geotechnical engineering, expansive soil treatment, road engineering, water conservancy engineering, can solve the problems of aggravating the global warming trend, reducing the project cost, unfavorable emission reduction policies, etc., to achieve a good economic Benefit, emission reduction, good social benefit effect

Inactive Publication Date: 2011-08-24
SOUTHEAST UNIV
View PDF1 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The price difference between the two is significant. If calcium carbide slag can be used instead of quicklime to improve expansive soil, the project cost can be greatly reduced; in addition, quicklime will release carbon dioxide during the manufacturing process, which will aggravate the global warming trend, which is not conducive to my country's existing Implementation of emission reduction policies

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
  • A method of improving swelling soil roadbed filling material by using waste carbide slag
  • A method of improving swelling soil roadbed filling material by using waste carbide slag
  • A method of improving swelling soil roadbed filling material by using waste carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Below in conjunction with laboratory test result the present invention is described in more detail:

[0017] The effect of calcium carbide slag improving expansive soil is planned to be evaluated through the combination of indoor test and theoretical analysis, mainly from the physical and mechanical properties of calcium carbide slag improving expansive soil.

[0018] 1) Basic properties of expansive soil: the test soil is taken from a certain place in Anhui, with a free expansion rate of 76%, which belongs to strong expansive soil, and its basic index is liquid limit w L =142.4%, plastic limit w p =40.8%, the natural water content of the soil w=30.5%, the content of fine particles (particle sizedmax =1.21g / cm 3 , the optimal water content w op =25.2%, the expansion under the load of 50kPa is 13.35%.

[0019] 2) Basic properties of carbide slag: the basic physical and chemical properties and chemical composition of the selected carbide slag are shown in Table 1 and T...

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

No PUM Login to View More

Abstract

Presently, research on swelling soil curing agent is still immature and economical special curing agent having high performance is lacking. The invention provides a method, which takes industrial waste carbide slag as a raw material, of improving swelling soil roadbed filling material by using waste carbide slag. In the method, carbide slag is used as the curing agent for improving the swelling soil roadbed. The method includes the steps of adding carbide slag into the swelling soil and stirring uniformly. The water content in the process of adding the carbide slag into the swelling soil should be controlled in the range of 18 to 20 percents and the mass ratio of the dry carbide slag and the dry swelling soil is 6-10 to 100. By the invention, not only the cost of the curing agent is reduced and remarkable curing effect is achieved, but also the industrial waste carbide slag can be recycled, thereby playing a part in comprehensive utilization and environment protection.

Description

technical field [0001] The invention mainly relates to the technical field of expansive soil treatment, and belongs to the technical fields of geotechnical engineering, road engineering and water conservancy engineering. Background technique [0002] Expansive soil has the characteristics of swelling when exposed to water and shrinking due to water loss. If it is directly used as roadbed filler without modification, during and after construction, expansive soil roadbed filling will easily swell when it encounters water, and it will easily swell when it is dry. It is easy to shrink, leading to shrinkage cracking, swelling and other diseases in the subgrade base and pavement structural layer, shortening the service life of the pavement, and causing serious damage to the construction of the project. [0003] Due to the obvious expansion and contraction characteristics of expansive soil, it often causes huge damage to the project. The current roadbed design and construction regu...

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
IPC IPC(8): E02D3/12
Inventor 杜延军陈志龙
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com