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Recycled powder waste hydraulic pavement base material and preparation method

A pavement base material and recovery powder technology, which is applied in the field of road engineering construction, can solve the problems of low concrete strength and inability to achieve large-scale recycling, and achieve the effects of alleviating tension, enriching comprehensive utilization methods, and improving comprehensive utilization rate

Inactive Publication Date: 2020-04-07
HENAN HIGHWAY ENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, recycled powder can be mixed with gravel for cement concrete prefabricated parts, and the amount of recycled powder is less than 30%. At the same time, the concrete made by ordinary cement and traditional technology has low strength and can only be used for non-load-bearing structures or decorative parts. , cannot be recycled on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The recycled powder waste hydraulic pavement base material of the present embodiment comprises the following components by mass: 60 parts of recycled powder, 40 parts of waste material, 6 parts of stabilizer, and 9.0 parts of water;

[0027] The stabilizer of the present embodiment includes the following components in mass percentage: No. 42.5 slag portland cement contains 80%, slaked lime contains 15%, and fly ash contains 5%;

[0028] The reclaimed powder of the present embodiment is: limestone is the reclaimed powder produced by the asphalt mixture production of raw material, and its water content after drying is 3.3%;

[0029] The waste materials in this embodiment are: crushed stones produced by asphalt mixing plant overflow and seriously polluted crushed stones at the bottom of the silo, and the two are mixed evenly in equal proportions, and the nominal maximum particle size is 31.5 mm.

[0030] The preparation method of the recovery powder waste hydraulic pavemen...

Embodiment 2

[0039] The recycled powder waste hydraulic pavement base material of the present embodiment includes the following components by mass: 60 parts of recycled powder, 40 parts of waste material, 8 parts of stabilizer, and 9.3 parts of water;

[0040] The stabilizer of the present embodiment includes the following components in mass percentage: No. 42.5 slag portland cement contains 80%, slaked lime contains 15%, and fly ash contains 5%;

[0041] The reclaimed powder of the present embodiment is: limestone is the reclaimed powder produced by the asphalt mixture production of raw material, and its moisture content after airing is 3.8%;

[0042] The waste materials in this embodiment are: crushed stones produced by asphalt mixing plant overflow and seriously polluted crushed stones at the bottom of the silo, and the two are mixed evenly in a ratio of 2 to 1, and the nominal maximum particle size is 26.5mm.

[0043] The preparation method of the recovery powder waste hydraulic paveme...

Embodiment 3

[0051] In this embodiment, the stabilizer is the same as that in Embodiment 1, and the recycled powder is: limestone is the recycled powder produced by the asphalt mixture production of the raw material, and its moisture content after drying is 4.8%; the waste material is: asphalt mixing plant overflow Mix the crushed stone waste and the seriously polluted gravel at the bottom of the silo evenly at a ratio of 1.5 to 1 to obtain waste with a nominal maximum particle size of 26.5mm.

[0052] The preparation method of the recovery powder waste hydraulic pavement base material of the present embodiment comprises the following steps:

[0053] Step 1, preparing the above-mentioned stabilizer for subsequent use;

[0054] Step 2: Take 50 parts of recycled powder after drying, 50 parts of waste materials, and 6 parts of stabilizer according to the quality, put them into the stabilized soil mixer, mix them evenly, and then add 8.0 parts of water and stir evenly for 18 seconds;

[0055]...

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Abstract

The invention discloses a recycled powder waste hydraulic pavement base material and a preparation method thereof. According to the novel pavement base material, a special stabilizer is adopted to modify and stabilize recycled powder produced by an asphalt mixing station, and a certain proportion of waste flash is made through doping, so that performance indexes such as mechanical properties of the material accord with those of a traditional pavement base material. According to the different mixing amounts of the stabilizer, the recycled powder and waste, the material can be selectively used for roads with different grades and different loads. The recycled powder is powdery waste generated by the production of an asphalt mixture mixing station, and about 40 kg of recycled powder can be generated when 1 ton of asphalt mixture is produced every time. At present, the road construction scale in China is huge, and traditional soil and gravel materials become scarce resources. The recycled powder and the waste are modified into the base material meeting engineering requirements by using the special stabilizer, so that the problem of sharp contradiction between supply and demand of traditional engineering materials is solved, and the waste can be recycled. Positive economic benefits, environmental protection benefits and social benefits can be generated for highway construction.

Description

technical field [0001] The invention relates to the field of road engineering construction, in particular to a recycled powder waste hydraulic pavement base material and a preparation method thereof. Background technique [0002] In pavement engineering, the dust removal system of the asphalt mixing plant will produce a large amount of waste powder and waste. Waste powder is the so-called recycled powder (waste powder produced by secondary bag dust removal), and waste refers to the gravel produced by the overflow of the mixing station. And the bottom of the silo is seriously polluted and cannot be used for waste in road construction. According to the survey, according to the different types of asphalt mixture produced, the asphalt mixing station will produce about 40kg of recycled powder for every 1t of asphalt mixture produced. Waste powder and waste materials belong to industrial waste, especially waste powder, and improper disposal will cause great pollution to the surro...

Claims

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Application Information

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IPC IPC(8): C04B28/08
CPCC04B28/08C04B2111/00017C04B2111/0075C04B22/064C04B18/08C04B22/002C04B18/16C04B14/02
Inventor 周顺喜巴启浩仝战北刘华志陆俊杰杨宏永汪润新王超刘伟朱帅朱啸山王许鹏曹鹏高永杰张志腾赵苡妤杨光
Owner HENAN HIGHWAY ENG GROUP
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