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A construction waste pavement base material and preparation method thereof

A technology for pavement base material and construction waste, which is applied in the field of road materials to achieve the effects of good construction workability, dry shrinkage and high strength

Active Publication Date: 2020-04-24
HUNAN YUNZHONG REGENERATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been more than half a century of research on alkali-activated cementitious materials at home and abroad. In the existing technology, it has been used to replace cement and mix with a large amount of sand to prepare concrete, but it is only used as a quick repair material for pavement.

Method used

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  • A construction waste pavement base material and preparation method thereof
  • A construction waste pavement base material and preparation method thereof
  • A construction waste pavement base material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment relates to a construction waste pavement base material and a preparation method thereof, the method material is composed of 96% mass fraction of concrete recycled aggregate and 4% cementitious material, and the external mixing is 9.4% relative to the sum of the above two raw materials Water and an alkali activator with a water mass fraction of 3.5%. Among them, the ratio of the fourth grade of concrete recycled aggregate is 0-4.75mm: 4.75-9.5mm: 9.5-19mm: 19-31.5mm = 32:26:22:20; the cementitious material is composed of slag: cement: gypsum = 60:36:4; the alkali activator is composed of water glass:sodium hydroxide=4:1.

[0049] Base material preparation method: first divide the total water consumption into two parts, add water glass and sodium hydroxide to one part of the water according to the above ratio, and stir the solution with a glass rod until the flake sodium hydroxide is completely dissolved, which is the prepared alkali Activator solution, t...

Embodiment 2

[0051] This embodiment relates to a construction waste pavement base material and a preparation method thereof, the method material is composed of 96% mass fraction of concrete recycled aggregate and 4% cementitious material, and the external mixing is 9.4% relative to the sum of the above two raw materials Water and an alkali activator with a water mass fraction of 4.3%. Among them, the ratio of the fourth grade of concrete recycled aggregate is 0-4.75mm: 4.75-9.5mm: 9.5-19mm: 19-31.5mm = 32:26:22:20; the cementitious material is composed of slag: cement: gypsum = 80:16:4; the alkali activator is composed of water glass:sodium hydroxide=4:1.

[0052] The preparation method of the base material is the same as that of Example 1.

Embodiment 3

[0054] This embodiment relates to a construction waste pavement base material and a preparation method thereof, the method material is composed of 96% mass fraction of concrete recycled aggregate and 4% cementitious material, and the external mixing is 9.4% relative to the sum of the above two raw materials Water and a base activator with a water mass fraction of 5.0%. Among them, the ratio of the fourth grade of concrete recycled aggregate is 0-4.75mm: 4.75-9.5mm: 9.5-19mm: 19-31.5mm = 32:26:22:20; the cementitious material is composed of slag: gypsum = 96: 4; Alkali activator is composed of water glass: sodium hydroxide = 4:1.

[0055] The preparation method of the base material is the same as that of Example 1.

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Abstract

The invention relates to a building rubbish pavement base material and a preparation method thereof. The pavement base material is prepared from the components in parts by mass: 95 to 96 parts of building rubbish recycled aggregate, 4 to 5 parts of binding material, 9.4 to 12.2 parts of water relative to the sum of the components i.e. the building rubbish recycled aggregate and the binding material, and 3.5 to 5.5 parts of alkali-activator relative to the mass of water. The pavement base material provided by the invention adopts building rubbish and industrial waste residues as main raw materials, and the material has the advantages of high strength, dry shrinkage, long construction working time and the like. By applying the building rubbish pavement base material provided by the inventionin a large scale, not only can considerable economic benefit be produced, but also a huge environmental protection benefit can be produced.

Description

technical field [0001] The invention relates to the technical field of road materials, in particular to a construction waste pavement base material and a preparation method thereof. Background technique [0002] As one of the pillar industries of my country's national economy, the construction industry has played an important role in the process of my country's modernization, but the prosperity and development of the construction industry has also brought a lot of construction waste. According to statistics, my country produced more than 2.6 billion tons of construction waste in 2016, while the recycling rate was only about 5%. The output of construction waste may reach its peak in 2020. Construction waste mainly comes from: land excavation and finishing activities such as planting, backfilling, and landscaping; production of building materials; residual materials and waste materials during construction; demolition of old buildings; house collapse caused by natural disasters...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/00017C04B2111/0075C04B2201/50C04B7/00C04B18/141C04B18/16C04B22/00C04B22/062
Inventor 吴超凡万暑张继森李行罗丽黄倩
Owner HUNAN YUNZHONG REGENERATION TECH CO LTD
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