Composite gelling material and its preparation method

A composite cementing material and raw material technology, applied in the field of building materials, can solve the problems of environmental secondary pollution, waste of land resources, occupation of land resources, etc., and achieve the effect of strengthening gelling ability and low cost

Inactive Publication Date: 2006-11-29
WUHAN UNIV OF TECH
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, metallurgy, electric power and other industries produce a large amount of industrial waste residues every year. The accumulation of these waste residues takes up a lot of valuable land resources, and at the same time it is easy to cause secondary pollution to the environment. Every year, a large amount of industrial waste is generated due to the demolition of old buildings and engineering structures. Amazing waste concrete, the disposal and stacking of these waste concrete also has the problem of wasting land resources and causing environmental pollution

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

[0014] Calcinate the cement stone separated from waste concrete (the original strength grade is C50) at 700°C for 1.5 hours, and then grind it to a specific surface area of ​​400m 2 / kg, put it with the specific surface area of ​​450m 2 / kg of finely ground blast furnace slag powder was mixed at a weight ratio of 2:1, and stirred evenly with a mixer to make a composite cementitious material A. Using this composite cementitious material as a cementing material, a low-strength grade concrete was prepared. The concrete mix ratio is shown in Table 1, and the properties of the prepared concrete are shown in Table 2:

[0015] water

Composite gel material A

the sand

stone

Superplasticizer

180

450

720

1080

2.7

[0016] in:

[0017] Water: drinking tap water

[0018] Sand: river sand, fineness modulus 2.6

[0019] Stone: limestone crushed stone, 5-25cm continuous gradation

[0020] Superplasticizer: polycarboxylate ...

Embodiment 2

[0023] Calcinate the cement stone separated from waste concrete (the original strength grade is C50) at 750°C for 1 hour, and then grind it to a specific surface area of ​​350m 2 / kg, put it with the specific surface area of ​​450m 2 / kg finely ground blast furnace slag powder is mixed at a weight ratio of 1:1, and stirred evenly with a mixer to make a composite cementitious material B, which is used as an admixture for the preparation of concrete and concrete mix The ratio is shown in Table 3, and the properties of the prepared concrete are shown in Table 4:

[0024] water

cement

Composite cementitious material B

the sand

stone

Superplasticizer

180

315

135

720

1080

2.7

[0025] in:

[0026] Water: drinking tap water

[0027] Sand: river sand, fineness modulus 2.6

[0028] Stone: limestone crushed stone, 5-25cm continuous gradation

[0029] Superplasticizer: polycarboxylate superplasticizer with ...

Embodiment 3

[0032] 1. Cement stone separated from waste concrete:

[0033] 1) Use a jaw crusher to crush the large pieces of waste concrete that have been removed from impurities such as steel bars and wood blocks into small pieces with a particle size of 10cm-30cm, and then use a cone-type eccentric shaft crusher to crush them into small pieces with a particle size of 3cm-10cm. Particles, use an electromagnetic iron remover to remove iron impurities such as small steel bars and iron nails that are difficult to manually sort, and obtain material particles;

[0034] 2) Heat the material particles to 250°C-350°C with a vertical oil furnace, and then cool them to room temperature by wind;

[0035] 3) Send the cooled material into the ball mill, and under the action of collision and friction between the material particles and between the material particles and the steel ball, the adhesive mortar and coarse aggregate are separated from each other, and the residence time of the material in the ...

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
activation indexaaaaaaaaaa
Login to view more

Abstract

A composite cementing material is prepared from the calcined cement-stone powder (50-70 Wt%) and the slag of blast furnace (30-50 Wt%). Said calcined cement-stone powder is prepared from the waste concrete through separating cement-stone, calcining at 600-800 deg.C grinding.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a composite cementitious material and a preparation method thereof. Background technique [0002] The traditional cement industry is an industry with huge energy and resource consumption and serious environmental load. It is of great significance to develop new auxiliary cementitious materials to reduce cement production to a certain extent and reduce energy, resource consumption and environmental load. At the same time, metallurgy, electric power and other industries produce a large amount of industrial waste residues every year. The accumulation of these waste residues takes up a lot of valuable land resources, and at the same time it is easy to cause secondary pollution to the environment. Every year, a large amount of industrial waste is generated due to the demolition of old buildings and engineering structures. Amazing waste concrete, the disposal and piling of...

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): C04B7/14
CPCC04B28/02C04B7/246Y02P40/10Y02W30/91C04B18/141
Inventor 胡曙光何永佳吕林女丁庆军
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