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

Geopolymer for treating salting soil foundation and preparing method and application of geopolymer

A geopolymer, saline soil technology, applied in soil protection, infrastructure engineering, cement production, etc., can solve the problems of high energy consumption, strong erosion, difficult to repair, etc., to achieve good mechanical properties and enhance durability Effect

Active Publication Date: 2016-05-04
SHANDONG UNIV
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a kind of unfavorable soil, saline soil not only has a great impact on my country's agricultural production, but also brings huge and difficult-to-repair damage to the construction of engineering projects.
The main characteristics of saline soil are shown in the following aspects: strong hygroscopicity, prone to water absorption and softening; sag, which dissolves in water, resulting in the sag of the foundation; strong expansibility, which is caused by changes in temperature and humidity Saline soil volume expansion; strong erosiveness, easy to corrode construction materials and reduce project quality
The Yellow River Delta is located in the Bohai Rim Economic Zone, which is a key area for limited open development in the country. However, the widespread saline soil in the Yellow River Delta seriously restricts the construction of infrastructure projects in the Yellow River Delta Economic Zone.
The existing method of treating saline soil encountered in engineering is usually to use cement mixed with fly ash and blast furnace slag to modify it. However, cement is not an environmentally friendly material, and the production of cement requires a lot of energy and produces a lot of carbon dioxide, which will cause serious damage to the 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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The geopolymer is made of the following components in parts by weight: 15 parts of blast furnace slag, 15 parts of fly ash, 70 parts of zeolite powder, and 20 parts of alkaline activator.

[0025] First prepare the alkaline activator, use solid sodium silicate and solid sodium hydroxide to prepare a water glass solution with a modulus of 1.5; at the same time, according to the above, use zeolite powder, fly ash and granulated blast furnace slag as basic raw materials Preparation of geopolymer solid material, wherein 70 parts of zeolite powder, fly ash and blast furnace slag are mixed uniformly and added according to the ratio of 1:1, accounting for 30 parts; the prepared water glass solution and geopolymer solid material are prepared according to the ratio Add water to 0.2, and add water to prepare a geopolymer slurry with a water-cement ratio of 0.5, fully stir with the saline soil encountered in road engineering for 5 minutes, and make a size of The test pieces were ...

Embodiment 2

[0027] The geopolymer is made of the following components in parts by weight: 10 parts of blast furnace slag, 30 parts of fly ash, 60 parts of zeolite powder and 30 parts of alkaline activator.

[0028] To prepare an alkaline activator, use solid sodium silicate and solid sodium hydroxide to prepare a water glass solution with a modulus of 1.5; at the same time, according to the above, use zeolite powder, fly ash and granulated blast furnace slag as basic raw materials to prepare Geopolymer solid material, wherein zeolite powder accounts for 60 parts, and fly ash and slag are mixed evenly according to the ratio of 3:1 and added, accounting for 40 parts; 0.3 to add, and add water to prepare a geopolymer slurry with a water-cement ratio of 0.5, fully stir with the saline soil encountered in road engineering for 5 minutes, and make a size of The test pieces were placed in a curing room at 20°C for 7 days, and then placed in a saline corrosive environment similar to the Yellow Ri...

Embodiment 3

[0030] Utilize ordinary Portland cement and sand, add water, and stir evenly in a mixer to prepare cement slurry with a water-cement ratio of 0.5, and fully mix it with saline soil encountered in road engineering for 5 minutes, and make a size of The specimens were placed in a curing room at 20°C for 7 days, and then placed in a saline corrosive environment similar to the Yellow River Delta for 180 days. After testing, it was found that compared with the compressive strength of 7 days, 180 days The compressive strength was reduced by 17%.

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

The invention discloses a geopolymer for treating a salting soil foundation and a preparing method and application of the geopolymer. The geopolymer is prepared from blast furnace slag, coal ash, zeolite powder and an alkaline excitant. The method comprises: (1) mixing metal hydroxide with water glass to prepare the alkaline excitant with a modulus of 1.5-2.5; (2) mixing the blast furnace slag, coal ash and zeolite powder to obtain a mixture; (3) adding the mixture in step (2) into the alkaline excitant prepared in step (1), and uniformly mixing to prepare the geopolymer. The geopolymer taking the blast furnace slag, coal ash, zeolite powder as main raw materials is developed, the mechanical properties of the geopolymer as a new binding material which is similar to but superior to cement are used, a compact structure formed by the blast furnace slag, coal ash, zeolite powder under exciting of the alkaline excitant and well pore size distribution are employed, the durability of the geopolymer is enhanced, and a good effect for solving the problem of reinforcing of the salting soil foundation in road engineering is achieved.

Description

technical field [0001] The invention specifically relates to a geopolymer for treating saline soil foundation, its preparation method and application, and belongs to the field of civil engineering. technical background [0002] With the continuous development of my country's transportation modernization, highway construction is also in a vigorous development stage. However, in the process of highway construction, some unfavorable soil geology, such as loess and frost heaving soil, etc., are often encountered, especially in the widespread areas of our country. saline soil. Saline soil is a general term for saline soil, alkaline soil and various salinized and alkalized soils, which are widely distributed all over the world. The area of ​​saline soil in my country is more than 200,000 square kilometers, accounting for about 2.1% of the total land area. It is mainly concentrated in the arid areas of Northwest China, followed by low-lying areas such as the North China Plain and S...

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): C04B7/153E02D3/12
CPCC04B7/1535C04B12/005E02D3/12Y02P40/10
Inventor 崔新壮侯飞刘泽群金青黄丹汤维泽楼俊杰张炯崔社强郑英杰
Owner SHANDONG 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