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Preparation method of clinker-free cement and concrete prepared with same

A clinker-free cement and concrete technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of low heat of hydration, low density, resistance to sulfur and alkali corrosion, long setting time, and low early strength To achieve the effects of reducing air pollutants, good cohesion and compactness, and improving construction performance

Inactive Publication Date: 2007-09-19
北京东方建宇混凝土科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with ordinary cement, slag cement has the advantages of low heat of hydration, good compactness, and good resistance to sulfur and alkali corrosion. Its disadvantages are poor water retention, low early strength, long setting time, not suitable for low temperature construction, and construction needs maintenance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Use the following proportions:

[0027] 50 kg of finely ground slag, 40 kg of fly ash, 5 kg of liquid water glass (modulus 1.2), and 0.05 kg of dichromate.

[0028] The qualified clinker-free cement is prepared by grinding fine slag and fly ash separately and then mixing them with liquid water glass and dichromate.

Embodiment 2

[0030] Use the following proportions:

[0031] 65 kg of finely ground slag, 28 kg of fly ash, 10 kg of liquid water glass (modulus 1.5), and 0.15 kg of dichromate.

[0032] The qualified clinker-free cement is prepared by grinding fine slag and fly ash separately and then mixing them with liquid water glass and dichromate.

Embodiment 3

[0034] Use the following proportions:

[0035] 45 kg of finely ground slag, 47 kg of fly ash, 7 kg of liquid water glass (modulus 1.3), and 0.10 kg of dichromate.

[0036] The qualified clinker-free cement is prepared by grinding fine slag and fly ash separately and then mixing them with liquid water glass and dichromate.

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Abstract

The invention discloses a producing method for clinker-free cement and the produced beton thereof, including 90-94 wt.% of industrial waste, 4-10 wt.% of sulfate booster, 0.05-0.15 wt.% of retarder. The invention has the industry aggregate as the primary material, and adopts a simple process of powder mixing which stably produces the clinker-free cement of 60-95MPa by adding sulfate booster and retarder. The beton pumping is normal and not isolated, not bleeding. The cohesiveness, compactibility and strength are high. It may fully utilize the solid wastes and reduce to discharge the atmosphere pollution.

Description

1. Technical field [0001] The present invention relates to a preparation method of clinker-free cement and the prepared concrete, more particularly to a preparation method of clinker-free cement produced and processed by using blast furnace slag and fly ash as main raw materials and the prepared concrete . 2. Background technology [0002] The use of slag to produce slag Portland cement is a relatively mature technology at home and abroad, accounting for about 30-70% of the used slag. Compared with ordinary cement, slag cement has the advantages of low heat of hydration, good compactness, and good resistance to sulfur and alkali corrosion. Its disadvantages are poor water retention, low early strength, long setting time, not suitable for low temperature construction, and construction needs maintenance. These defects have been or are being overcome and improved. Chinese patent CN-1546411A discloses that the cement prepared by mixing industrial waste and waste residue such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/26C04B18/12C04B18/08C04B22/08C04B103/00C04B103/22
CPCY02W30/91
Inventor 路来军
Owner 北京东方建宇混凝土科学技术研究院有限公司
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