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Cement stabilized macadam mixture doped with waste incineration slag

A technology for cement-stabilized gravel and waste incineration slag, which is applied in the field of highway construction materials, can solve the problems affecting the road performance, low strength and resource utilization rate limitation of cement-stabilized gravel mixture, and achieves the promotion of an environment-friendly society. , the effect of reducing the use and improving the utilization rate of resources

Inactive Publication Date: 2020-12-29
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the interior of waste incineration slag is loose and porous, and its strength is much lower than that of natural aggregates, it is usually difficult to meet the technical requirements of waste incineration slag. If it is used as coarse aggregate, it will seriously affect the road performance of cement stabilized gravel mixture.
Therefore, waste incineration slag with particle size ≤ 4.75mm can be used as fine aggregate, but waste incineration slag with particle size > 4.75mm cannot be used as coarse aggregate. resource utilization is greatly limited

Method used

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  • Cement stabilized macadam mixture doped with waste incineration slag
  • Cement stabilized macadam mixture doped with waste incineration slag
  • Cement stabilized macadam mixture doped with waste incineration slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The cement-stabilized gravel mixture prepared in this example includes the following components in terms of mass percentage: 31.5% of 4.75mm-13.2mm slag pellets, 29.8% of slag, 4.5% of cement, 25.8% of aggregate, and 8.4% of water.

[0033] The slag pellets include the following components in terms of mass percentage: 32.6% of 0-2.36mm waste incineration slag, 6.5% of cement, 32.5% of fly ash, 7.8% of activator, and 20.6% of water. Wherein, the stimulating agent is a mixture of calcium hydroxide and anhydrous sodium sulfate with a mass ratio of 5:1.

[0034] The slag is 0-4.75mm waste incineration slag, and the 0-4.75mm waste incineration slag is the waste incineration slag that has been pretreated through magnetic separation, iron removal, air selection, eddy current separation and other processes. After screening, the particle size range is 0 ~4.75mm. The performance test result is: the apparent density is 2.32g / cm 3 , The water absorption rate is 11.7%.

[0035] O...

Embodiment 2

[0068] In this embodiment, the cement-stabilized gravel mixture mixed with waste incineration slag comprises the following components in terms of mass percentage: 4.75mm-13.2mm slag pellets 31.2%, slag 30.3%, cement 4.1%, aggregate 26.1% , Water 8.3%.

[0069] The slag pellets include the following components in terms of mass percentage: 32.6% of 0-2.36mm waste incineration slag, 6.5% of cement, 32.5% of fly ash, 7.8% of activator, and 20.6% of water. Wherein, the stimulating agent is a mixture of calcium hydroxide and anhydrous sodium sulfate with a mass ratio of 5:1.

[0070] The slag is 0-4.75mm waste incineration slag, and the 0-4.75mm waste incineration slag is the waste incineration slag that has been pretreated through magnetic separation, iron removal, air selection, eddy current separation and other processes. The cement uses ordinary silicon with a strength grade of 42.5. Salt cement, the fly ash is grade I fly ash, the aggregate is limestone, the calcium hydroxide ...

Embodiment 3

[0079] In this embodiment, the cement-stabilized gravel mixture mixed with garbage incineration slag comprises the following components in terms of mass percentage: 4.75mm-13.2mm slag pellets 30.0%, slag 30.1%, cement 4.4%, aggregate 26.9% , Water 8.6%.

[0080] The slag pellets include the following components in terms of mass percentage: 32.6% of 0-2.36mm waste incineration slag, 6.5% of cement, 32.5% of fly ash, 7.8% of activator, and 20.6% of water. Wherein, the stimulating agent is a mixture of calcium hydroxide and anhydrous sodium sulfate with a mass ratio of 5:1.

[0081] The slag is 0-4.75mm waste incineration slag, and the 0-4.75mm waste incineration slag is the waste incineration slag that has been pretreated through magnetic separation, iron removal, air selection, eddy current separation and other processes. The cement uses ordinary silicon with a strength grade of 42.5. Salt cement, the fly ash is grade I fly ash, the aggregate is limestone, the calcium hydroxid...

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Abstract

The invention discloses a cement stabilized macadam mixture doped with waste incineration slag. The cement stabilized macadam mixture is prepared by the following steps: preparing 0-2.36 mm waste incineration slag, cement, fly ash, an excitant and water according to a mass percentage ratio of 32.6%: 6.5%:32.5%:7.8%:20.6%, mixing, pelletizing, curing to obtain 4.75-13.2 mm slag pellets, and uniformly mixing with 0-4.75 mm waste incineration slag, cement, aggregate and water to obtain the mixture. According to the invention, the slag pellet prepared by the invention meets the technical requirements of the existing highway pavement base specification on coarse aggregate, so that the condition that the waste incineration slag cannot be used as the coarse aggregate due to substandard crushing value is changed, the resource utilization rate of the waste incineration slag in the highway base is greatly improved, and the slag pellet conforms to the green ecological characteristic, and is suitable for base layer materials of heavy, medium and light traffic pavements of roads of two or less levels; and the the slag pellet is used for replacing part of coarse aggregate of the cement stabilized macadam mixture, so that the use of natural aggregate is reduced, and the environmental protection is promoted.

Description

technical field [0001] The invention belongs to the research field of road building materials, and in particular relates to a cement-stabilized gravel mixture mixed with waste incineration slag. Background technique [0002] In recent years, with the popularization of the waste incineration method, more waste incineration slag waste is produced in my country every year. The so-called waste incineration slag refers to the product remaining on the incinerator bed after domestic waste is burned at a high temperature of 850°C to 1100°C, and its mass accounts for about 80% of the total waste incineration residue. Waste incineration slag has good physical and chemical properties and contains less harmful substances such as heavy metals. It has the basic conditions for resource utilization. If landfill is still used, it will not only occupy a lot of land, but also cause waste of resources. Therefore, how to recycle waste incineration slag has become one of the hot issues that peop...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2201/50C04B14/28C04B18/08C04B18/10C04B22/064C04B22/147
Inventor 郭咏梅黄铁成吴飞接亚东
Owner YANGZHOU UNIV
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