Environmental-friendly clinker-free cement and preparation method thereof

A clinker-free cement and environmentally friendly technology, applied in cement production, etc., can solve problems such as limited application range, high price, and material cracking, and achieve the effects of wide source of raw materials, excellent performance, and increased strength

Inactive Publication Date: 2009-09-09
CHANGZHOU VOCATIONAL INST OF ENG
View PDF4 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant has conducted research on the stimulating effect of gypsum, and the results show that the stimulating effect of gypsum on slag is not obvious; at the same time, adding too much gypsum will cause a sudden change or variation in cement performance, and eventually lead to serious cracking of the material
[0005] (2) This patent also uses sodium hydroxide, which is expensive, has limited sources, and is prone to deliquescent deterioration, as an auxiliary activator, resulting in high production costs for this clinker

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
  • Environmental-friendly clinker-free cement and preparation method thereof
  • Environmental-friendly clinker-free cement and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] a) The granulated blast furnace slag is dried, crushed and ground to obtain a specific surface area of ​​420m 2 / kg of slag powder;

[0054] b) drying and grinding the carbide slag, and sieving it with a 0.08mm sieve to obtain carbide slag powder;

[0055] c) The slag powder prepared in step a) and the calcium carbide slag powder and gypsum and additives prepared in step b) are prepared according to the 1# formula in Table 1, but excluding the water reducer, and mixed uniformly; that is Clinker-free cement can be produced.

[0056] The clinker-free cement and standard mortar were mixed, formed and cured; the cured specimens were tested for performance according to the methods and requirements specified in GB / T17671-1999, and the test results are shown in Table 2.

Embodiment 2

[0058] a) The granulated blast furnace slag is dried, pulverized and ground to obtain a specific surface area of ​​450m 2 / kg of slag powder;

[0059] b) drying and grinding the carbide slag, and sieving it with a 0.08mm sieve to obtain carbide slag powder;

[0060] c) The slag powder obtained in step a) and the calcium carbide slag powder and gypsum and additives prepared in step b) are formulated according to the 2# formula in Table 1, but the water reducer is not included, and mixed uniformly; that is Clinker-free cement can be produced.

[0061] The clinker-free cement and standard mortar are mixed, formed and cured; the cured specimens are subjected to performance testing according to the methods and requirements stipulated in GB / T17671-1999. The test results are shown in Table 2.

Embodiment 3

[0063] a) The granulated blast furnace slag is dried, pulverized and ground to obtain a specific surface area of ​​480m 2 / kg of slag powder;

[0064] b) drying and grinding the carbide slag, and sieving it with a 0.08mm sieve to obtain carbide slag powder;

[0065] c) The slag powder obtained in step a) and the calcium carbide slag powder and gypsum and additives prepared in step b) are formulated according to the 3# formula in Table 1, but the water reducer is not included, and mixed uniformly; Clinker-free cement can be produced.

[0066] The clinker-free cement and standard mortar are mixed, formed and cured; the cured specimens are subjected to performance testing according to the methods and requirements stipulated in GB / T17671-1999. The test results are shown in Table 2.

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 relates to environmental-friendly clinker-free cement, dry powder mortar thereof and a preparation method thereof. The environmental-friendly clinker-free cement comprises the following components by weight portion: a) 60-92 portions of slag, b) 5-25 portions of carbide slag; c) 2-10 portions of plaster; and d) 1-20 portions of auxiliary agent, wherein the auxiliary agent can be silicon powder, siliceous dust, white carbon black, sulphate, carbonate and sulphate aluminium or the mixture of more than two or three of the silicon powder, the siliceous dust, the white carbon black, the sulphate, the carbonate and the sulphate aluminum, but preferably the mixture of the silicon powder and the siliceous dust. The environmental-friendly clinker-free cement has wide raw material source and low cost. The performance of the obtained environmental-friendly clinker-free cement reaches each index of slag silicate cement PS32.5 specified by GB/T178-2007, and the environmental-friendly clinker-free dry powder mortar meets each performance index specified in the Jiangsu province engineering construction standard-the ready mixed mortar technical regulation (DGJ32/J13-2005).

Description

technical field [0001] The invention relates to the field of clinker-free cement, in particular to the production of environment-friendly clinker-free cement and its dry powder mortar and concrete by using industrial waste residue as a main raw material. Background technique [0002] As far as the applicant knows, the Chinese patent CN1033505C relates to a steel slag early-strength clinker-free cement. The patent discloses that steel slag and blast furnace slag are used as the main constituent materials, and a certain amount of potassium aluminosilicate (sodium) glass is added as an activator. It is made by co-grinding and has certain application value, but the main activator of this patent-potassium aluminosilicate (sodium) is self-made. According to its patent specification, the raw materials must be subjected to a high temperature of 950-1250°C during the preparation of the activator. Calcination melting treatment, its preparation process is complicated, consumes a lot 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
IPC IPC(8): C04B7/153
CPCC04B2111/00017C04B7/153Y02P40/10
Inventor 刘日鑫徐开胜侯文顺徐永红
Owner CHANGZHOU VOCATIONAL INST OF ENG
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