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Early strength composite Portland cement

A composite silicate and Portland cement technology, applied in cement production and other directions, can solve the problems of strict requirements for recycling and sorting waste glass, insignificant economic benefits, and difficulty in utilizing waste glass, etc. Effective, low cost effect

Inactive Publication Date: 2013-11-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has strict requirements on the recycling and sorting of waste glass, and the economic benefits are not obvious.
At the same time, it is difficult to utilize waste glass mixed with various components, materials and colors

Method used

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  • Early strength composite Portland cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0014] Components and their mass ratios: waste glass powder 20%, Portland cement clinker 60%, gypsum 6%, ordinary fly ash 14%.

[0015] Process: Mix the components and grind them until the sieve residue of 80 μm is 5.1%, and then the composite Portland cement is formed.

[0016] Effect: See Table 1.

[0017]

Embodiment example 2

[0019] Components and their mass ratios: waste glass powder 30%, Portland cement clinker 55%, gypsum 5%, CFBC (circulating fluidized bed boiler) fly ash 10%.

[0020] Process: After mixing the components, grind them until the sieve residue of 80 μm is 4.7%, and then the composite Portland cement is formed.

[0021] Effect: See Table 1.

[0022]

Embodiment example 3

[0024] Components and their mass ratios: waste glass powder 35%, Portland cement clinker 55%, gypsum 4%, CFBC bottom slag powder 6%.

[0025] Process: After mixing the components, grind them until the sieve residue of 80 μm is 3.6%, and then the composite Portland cement is formed.

[0026] Effect: See Table 1.

[0027]

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PUM

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Abstract

The invention discloses a method for preparing composite Portland cement by utilizing waste glass as a main raw material. The composite Portland cement is prepared from 20-50% of waste glass, 30-60% of cement clinker, 2-6% of gypsum and 5-15% of other mixed materials by mass. The novel composite Portland cement is obtained by mixing the materials uniformly and then grinding the mixture to 80mu m, wherein the weight of screen residues is 3-5%. The method is simple in process and low in cost, is especially suitable for waste glass difficult to recycle, effectively protects the environment, promotes recycling of solid wastes, and has obvious economic, environmental and social benefits.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an early-strength composite portland cement. Background technique [0002] With the rapid development of science and technology and the improvement of people's living standards, the production and use of glass are also increasing. At the same time, it is inevitable to produce a lot of glass waste, forming a large amount of waste glass. This not only causes a waste of resources, but also pollutes the environment. [0003] At present, all countries in the world are seeking resource utilization methods of waste glass. In my country, the mainstream method of recycling waste glass at this stage is: collecting waste glass, sorting it and returning it to the furnace for smelting. However, this method has strict requirements on the recycling and sorting of waste glass, and the economic benefits are not obvious. At the same time, it is difficult to utilize waste glass mixed...

Claims

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Application Information

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IPC IPC(8): C04B7/24C04B7/04
CPCY02P40/10
Inventor 李琴孙增青崔皓徐燕陶德晶翟建平
Owner NANJING UNIV
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