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

Geopolymer pavement base material as well as preparation method and application thereof

A pavement base material and geopolymer technology, applied in the field of building materials, can solve the problems of low chemical reactivity, waste of resources, potential safety hazards, etc., and achieve the effects of low energy consumption, low environmental pollution, and cost savings

Pending Publication Date: 2022-01-14
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, construction waste is mainly disposed of in the form of open-air stacking or simple landfill, which not only occupies cultivated land, pollutes the environment, but also poses a very large safety hazard
The current recycling method of engineering dregs is mainly to separate the sand and gravel and reuse them as aggregates, while the mud part is discarded and landfilled. The utilization rate of resources is extremely low, resulting in a serious waste of resources
Moreover, the quartz in the slag is a chemically inert substance and has no activity. The crystal structure of kaolinite is relatively stable, and its chemical reactivity is low, which is not conducive to the reaction with the alkali activator to form gel. Such slag is directly used as roadbed filler. Simple stacking and landfilling, no bonding between slag particles, resulting in low strength of roadbed filler, which cannot meet the strength requirements of road engineering

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
  • Geopolymer pavement base material as well as preparation method and application thereof
  • Geopolymer pavement base material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The invention provides a kind of preparation method of geopolymer pavement base material, comprising the following steps:

[0023] Mix calcined slag, uncalcined slag and alkali activator to carry out polymerization reaction to obtain geopolymer pavement base material;

[0024] The alkali activators include water, sodium hydroxide and water glass.

[0025] Unless otherwise specified, the present invention has no special requirements on the sources of the raw materials used for the preparation, and commercially available products well known to those skilled in the art can be used.

[0026] The invention mixes the calcined slag, the uncalcined slag and the alkali activator to carry out the polymerization reaction to obtain the geopolymer pavement base material.

[0027] The present invention preferably mixes water, sodium hydroxide and water glass to obtain the alkali activator.

[0028] In the present invention, the mass ratio of the sodium hydroxide, water glass and wa...

Embodiment 1～5

[0058] The raw material consumption of embodiment 1~5 is shown in Table 1, and the preparation method of geopolymer pavement base material is:

[0059] Use a crusher to break the slag into granules below 5mm, then place it in an oven for drying treatment, grind the dried slag to a size below 0.3mm with a grinder, and then place part of the ground slag on the horse Carry out calcination in a furnace, the heating rate during calcination is 10°C / min, calcine at 800°C for 3h, and then cool naturally to room temperature to obtain calcined slag;

[0060] Pour water into a beaker filled with solid sodium hydroxide (purity 99.9%), and stir with a glass rod while pouring. After the sodium hydroxide is completely dissolved, pour the obtained sodium hydroxide solution into a beaker filled with water glass. (modulus=2.25) in the beaker, stir and be cooled to room temperature, obtain alkali activator (the modulus of water glass in the alkali activator is 1.25;

[0061] According to the "C...

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
flexural strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of building materials, and particularly relates to a geopolymer pavement base material as well as a preparation method and application thereof. According to the method, muck is subjected to calcination treatment, structural interlayer hydroxyl groups can be removed from kaolinite contained in the muck, the muck becomes amorphous phase crystals, namely metakaolinite, active silicon-aluminum substances in the metakaolinite can be subjected to a depolymerization-polycondensation reaction with an alkali activator, a gel material is generated and bonded with other inactive components, and the strength of the geopolymer pavement base material is improved. Experimental results show that the breaking strength of the geopolymer pavement base material prepared from the calcined muck reaches 7.25 MPa, and the compressive strength reaches 48.58 MPa.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a geopolymer pavement base material and its preparation method and application. Background technique [0002] Engineering slag is the soil (including sand and gravel) produced in engineering construction such as mineral mining, foundation construction, and underground space excavation. With the continuous acceleration of urban construction, the output of engineering dregs has increased dramatically year by year, and the resource utilization of engineering dregs is an urgent need for the sustainable development of today's society. [0003] At present, construction waste is mainly disposed of in the form of open-air stacking or simple landfill, which not only occupies cultivated land, pollutes the environment, but also poses a very large safety hazard. The current recycling method of engineering dregs is mainly to separate the sand and gravel and reuse them ...

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): C04B28/00C04B20/04C04B18/16
CPCC04B28/006C04B20/04C04B2111/0075C04B2201/50C04B18/16C04B22/062C04B12/04Y02P40/10Y02W30/91
Inventor 周傲郭恒珲刘铁军邹笃建魏慧男王倩倩
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL