Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of bio-modified coal gangue grouting material

A grouting material and biological modification technology are applied in the field of preparation of biological modified coal gangue grouting materials, which can solve the problems of large shrinkage deformation, weak anti-seepage pressure, low stone strength and cohesive force, etc., and achieve shrinkage deformation. Small, enhanced anti-osmotic pressure, high strength and adhesion effect

Active Publication Date: 2017-01-11
山西四通晋业科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the disadvantages of the current grouting materials such as low stone strength and cohesive force, weak anti-osmotic pressure ability, and large shrinkage and deformation when the slurry is hardened, a method for crushing and calcining coal gangue is provided. Mix with deionized water, spray liquid nitrogen to freeze and then dissolve to obtain porous coal gangue, then induce fermentation with crushed sepiolite powder through calcium sulfoaluminate, filter and dry to obtain a slightly expanded mixed powder, and then mix with dead branches of elm The lignin obtained by ultrasonic extraction is mixed, and the pig bone powder obtained by fermenting and pulverizing pig bones is added and stirred, and then mixed with sodium citrate and ball-milled to obtain a grouting material
The preparation steps of the invention are simple, and the obtained product has high calculus strength and high cohesive force. The grouting material is made by making full use of bio-modified coal gangue. It solves the problem that its anti-osmotic pressure ability is weak, and the shrinkage deformation is large when the slurry is hardened.

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

example 1

[0016] Firstly, 200g of coal gangue was weighed and pulverized, passed through an 80-mesh sieve to obtain coal gangue powder, and the powder was placed in a muffle furnace, heated to 700°C, kept for calcination for 2 hours, and then the calcined coal gangue powder was taken out and cooled naturally to 200°C, put it into a beaker filled with 500mL deionized water, spray it with liquid nitrogen for 5s, then return to room temperature naturally, filter, and dry the filter residue at 95°C for 1h to obtain porous coal gangue powder; then weigh 20g Pulverize the sepiolite, pass through a 80-mesh sieve to obtain sepiolite powder, put it in a beaker, and add the porous coal gangue powder obtained above to the beaker, stir and mix for 5 minutes, and place it in a fermenter, and then add 300mL of deionized water, 5g of calcium sulfoaluminate, stirred for 3min, controlled the temperature of the fermenter at 40°C and humidity of 80%, stirred and fermented for 24h, took out the fermented li...

example 2

[0019]Firstly, 250g of coal gangue was weighed and pulverized, passed through a 90-mesh sieve to obtain coal gangue powder, and the powder was placed in a muffle furnace, heated to 750°C, kept for calcination for 3 hours, and then the calcined coal gangue powder was taken out and cooled naturally to 250°C, put it into a beaker filled with 550mL deionized water, spray it with liquid nitrogen for 7s, return to room temperature naturally, filter, and dry the filter residue at 100°C for 2h to obtain porous coal gangue powder; then weigh 25g Pulverize the sepiolite, pass through a 90-mesh sieve to obtain sepiolite powder, put it in a beaker, and add the porous coal gangue powder obtained above into the beaker, stir and mix for 8 minutes, and place it in a fermenter, and then add 350mL of deionized water, 8g of calcium sulfoaluminate, stirred for 4min, controlled the temperature of the fermenter at 45°C and humidity of 85%, stirred and fermented for 25h, took out the fermentation bro...

example 3

[0022] Firstly, 300g of coal gangue was weighed and pulverized, passed through a 100-mesh sieve to obtain coal gangue powder, and the powder was placed in a muffle furnace, heated to 800°C, kept for calcination for 3 hours, and then the calcined coal gangue powder was taken out and cooled naturally to 300°C, put it into a beaker filled with 600mL deionized water, spray it with liquid nitrogen for 8s, then return to room temperature naturally, filter, and dry the filter residue at 105°C for 2h to obtain porous coal gangue powder; then weigh 30g Pulverize the sepiolite, pass through a 100-mesh sieve to obtain sepiolite powder, put it in a beaker, and add the porous coal gangue powder obtained above to the beaker, stir and mix for 10 minutes, and place it in a fermenter, and then add 400mL of deionized water, 10g of calcium sulfoaluminate, stirred for 5min, controlled the temperature of the fermenter at 50°C and humidity of 90%, stirred and fermented for 26h, took out the fermente...

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 preparation method of a bio-modified coal gangue grouting material and belongs to the technical field of grouting material preparation. According to the method, coal gangue is smashed and calcined and then mixed with water, liquid nitrogen is sprayed for freezing, the mixture is then dissolved, and porous coal gangue is obtained; the porous coal gangue and smashed sepiolite powder are subjected to calcium sulphoaluminate induced fermentation, filtering and drying, and micro-expansive mixed powder is obtained; the micro-expansive mixed powder is mixed with lignin prepared from elm deadwood through ultrasonic extraction, after pig bone powder prepared from pig bones through fermentation and smashing is added for stirring, the materials and sodium citrate are mixed and ball-milled, and the grouting material is prepared. The preparation method has the advantages that preparation steps are simple, the bio-modified coal gangue is fully utilized to prepare the grouting material, pertinence is high, the anti-permeation capacity of the grouting material is effectively enhanced, and shrinkage distortion is low during setting; the obtained product is high in set strength and adhesive force and good in reinforcing and seepage-proofing effect.

Description

technical field [0001] The invention relates to a method for preparing a biologically modified coal gangue grouting material, which belongs to the technical field of grouting material preparation. Background technique [0002] The grouting material can exist in liquid form, and it is convenient to use hydraulic pressure, air pressure or electrochemical principles to inject into the internal space of cracks, cracks, pores and other internal spaces of the corresponding medium, and has the ability to cement and solidify, so that the leakage channel of the medium can be blocked, physical properties and mechanical properties A general term for an improved class of engineering materials. In some engineering fields, grouting materials are often referred to as grouting materials. Grouting materials can be divided into solid grouting materials, chemical grouting materials and fine mineral grouting materials. Solid particle grouting material is a suspension composed of solid particl...

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): C04B26/02
CPCC04B26/02C04B2111/00293C04B2111/70C04B14/042C04B18/12C04B18/0427C04B24/06C04B22/142
Inventor 丁玉琴邹宇帆孟浩影
Owner 山西四通晋业科技有限公司