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Silicate cement prepared from solid wastes and preparation method of silicate cement

A Portland cement and solid waste technology, applied in cement production, etc., can solve problems such as low activity, achieve the effects of reducing severe smog in the atmosphere, saving and replacing primary resources, and reducing emissions

Inactive Publication Date: 2015-04-22
XUZHOU YUXIN ENVIRONMENTAL PROTECTION BUILDING MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low reactivity of these materials, refractory grinding has become a barrier to process utilization

Method used

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  • Silicate cement prepared from solid wastes and preparation method of silicate cement
  • Silicate cement prepared from solid wastes and preparation method of silicate cement
  • Silicate cement prepared from solid wastes and preparation method of silicate cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 20kg of raw material construction waste, 10kg of steel slag, 10kg of tailings, 52kg of clinker, 8kg of gypsum, and 60mg of external activator according to the weight ratio. First crush 20kg of construction waste and 8kg of gypsum with a crusher to particles with an average particle size of ≤10mm, dry them until the moisture content is less than 2%, grind 10kg of steel slag and 10kg of tailings with a roller mill for 50min, and mix them with chemical The activator will continue to grind for 25 minutes through the ball mill until the specific surface area is ≥ 500m 2 / ㎏, ready-made product.

Embodiment 2

[0029] Weigh 35kg of raw construction waste, 10kg of steel slag, 13kg of tailings, 45kg of clinker, 7kg of gypsum, and 40mg of external activator according to the weight ratio. First crush 20kg of construction waste and 8kg of gypsum with a crusher to particles with an average particle size of ≤10mm, dry them until the moisture content is less than 2%, grind 10kg of steel slag and 10kg of tailings with a roller mill for 50min, and mix them with chemical The activator will continue to grind for 25 minutes through the ball mill until the specific surface area is ≥ 500m 2 / ㎏, ready-made product.

[0030] The products made in the above two examples are superior to GB175-2007 Portland Slag Cement P·S·A, "Pozzolanic Portland Cement" and "Fly Ash Portland Cement" through testing performance and technical requirements , "Composite Portland Cement" standard. See Table 1 and Table 2 for specific results.

[0031] Example 1: Loss on ignition 2.26, sulfur trioxide 2.74, magnesium oxide ...

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Abstract

The invention discloses silicate cement prepared from solid wastes and a preparation method of the silicate cement and belongs to the technical field of building materials. The silicate cement is prepared from the raw materials: clinkers, gypsum, slag, tailings and building wastes by adding a chemical excitant. The silicate cement is prepared from the following raw materials in percentage by weight: 40-60% of clinkers, 5-12% of gypsum, 8-15% of slag, 10-25% of tailings and 20-45% of building wastes, wherein the use level of the chemical excitant is 0.02-0.08% of the total weight of the raw materials; the slag is slag without metallic iron; the tailings are wastes left by exploiting a mine; the building wastes are building waste bricks or concrete plate blocks without metals or other impurities. The silicate cement disclosed by the invention is widely applied to concrete and cement products, relieves increasingly deficient clinker firing resources and reduces discharge of carbon dioxide of cement, thereby facilitating reduction of severe haze in atmosphere. primary resources are saved and replaced, so that the circular economy development is promoted and the pollution is reduced to protect the ecological environment. In the production process, further pollution on the environment is not generated.

Description

technical field [0001] The invention relates to solid waste Portland cement and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the progress of modern industry, human society is paying more and more attention to the sustainable development of native resources. The recycling of a large amount of bulk industrial waste; the acceleration of urban construction produces a large amount of construction waste. More and more attention is paid to the surrounding ecological environment. Due to the low reactivity of these materials, refractory grinding has become an obstacle to process utilization. Stimulate the activity and improve the grindability to replace the traditional large-volume building materials to produce green and environmentally friendly cement. Contents of the invention [0003] In view of the above problems, the present invention provides a solid waste Portland cement and its preparation method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/21
CPCY02P40/10
Inventor 王品伦梁影
Owner XUZHOU YUXIN ENVIRONMENTAL PROTECTION BUILDING MATERIALS CO LTD
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