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Green ecological cement with waste residues from ready-mix plant as raw material, and production method thereof

An ecological cement and ready-mix technology, applied in cement production and other directions, can solve the problems of low utilization efficiency and single utilization method of waste residue in ready-mix plants, and achieve the effects of improving solid-phase reaction rate, improving flammability and high reactivity.

Inactive Publication Date: 2019-11-19
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At this stage in China, the utilization efficiency of waste residue from ready-mixing plants is relatively low, and the utilization method is relatively simple. For example, CN105366974B discloses a method for preparing recycled fine powder from waste residue in a concrete mixing plant, the obtained recycled fine powder and its use, specifically to replace cement or other concrete admixtures to save cost

Method used

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  • Green ecological cement with waste residues from ready-mix plant as raw material, and production method thereof
  • Green ecological cement with waste residues from ready-mix plant as raw material, and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of green ecological cement using the waste residue of a ready-mixing plant as a raw material is prepared by the following method:

[0029] (1) After crushing 35 parts of construction solid waste, grind it with 25 parts of ready-mixed plant waste residue and 10 parts of phosphorus slag until the sieve residue on a 0.08mm square hole sieve is no more than 15%; the construction solid waste is waste concrete, chemical composition The content of CaO in the medium is 35-45wt%, SiO 2 The content is 15~30wt%, Al 2 o 3 The content of MgO is 2~6wt%, the content of MgO is 0~3wt%, SO 3 The content is 0-1wt%; the specific surface area of ​​the ready-mixing plant waste residue is ≥400m 2 / kg, the main components are: CaO≥40%, SiO 2 ≥15%, Al 2 o 3 ≥10%, MgO≤2%, SO 3 ≤2%; the phosphorus slag is quenched phosphorus slag, where P 2 o 5 ≤3%;

[0030] (2) mixing 5 parts of red mud, 2.5 parts of calcium carbide slag and 0.8 part of iron powder with the pulverized powder in ...

Embodiment 2

[0034] A kind of green ecological cement using the waste residue of a ready-mixing plant as a raw material is prepared by the following method:

[0035] (1) After crushing 50 parts of construction solid waste, grind with 10 parts of waste residue and 20 parts of phosphorous slag until the sieve residue on a 0.08mm square hole sieve is no more than 15%; the construction solid waste is waste concrete, and the amount of CaO in the chemical components The content is 35~45wt%, SiO 2 The content is 15~30wt%, Al 2 o 3 The content of MgO is 2~6wt%, the content of MgO is 0~3wt%, SO 3 The content is 0-1wt%; the specific surface area of ​​the ready-mixing plant waste residue is ≥400m 2 / kg, the main components are: CaO≥40%, SiO 2 ≥15%, Al 2 o 3 ≥10%, MgO≤2%, SO3 ≤2%; the phosphorus slag is quenched phosphorus slag, where P 2 o 5 ≤3%;

[0036] (2) Mix 10 parts of red mud, 0.5 parts of carbide slag and 1.5 parts of iron powder with the pulverized powder in step (1) to make cement ...

Embodiment 3

[0040] A kind of green ecological cement using the waste residue of a ready-mixing plant as a raw material is prepared by the following method:

[0041] (1) After 42 parts of construction solid waste are crushed, grind with 20 parts of waste residue and 15 parts of phosphorus slag until the residue on a 0.08mm square hole sieve is no more than 15%; The content is 35~45wt%, SiO 2 The content is 15~30wt%, Al 2 o 3 The content of MgO is 2~6wt%, the content of MgO is 0~3wt%, SO 3 The content is 0-1wt%; the specific surface area of ​​the ready-mixing plant waste residue is ≥400m 2 / kg, the main components are: CaO≥40%, SiO 2 ≥15%, Al 2 o 3 ≥10%, MgO≤2%, SO 3 ≤2%; the phosphorus slag is quenched phosphorus slag, where P 2 o 5 ≤3%;

[0042] (2) mixing 8 parts of red mud, 1 part of calcium carbide slag and 1 part of iron powder with the finely ground powder in step (1) to make cement raw meal, and the iron powder is copper slag;

[0043] (3) Send the cement raw material in ...

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Abstract

The invention specifically relates to green ecological cement with waste residues from a ready-mix plant as a raw material, and a production method thereof, belonging to the technical field of treatment and comprehensive utilization of solid waste. The green ecological cement comprises the following components in parts by weight: 10 to 25 parts of waste residues from a ready-mix plant, 35 to 50 parts of constructional solid waste, 10 to 20 parts of phosphorus slag, 0.8 to 1.5 parts of iron powder, 5 to 10 parts of red mud, 0.5 to 2.5 parts of carbide slag, 1 to 3 parts of dihydrate gypsum and0 to 15 parts of an admixture. According to the invention, the waste residues from the ready-mix plant, the constructional solid waste, the phosphorus slag and the like are subjected to a reaction soas to generate the ecological cement; a firing temperature is 1200 to 1350 DEG C, so energy is saved, and a rotary kiln can be protected to a certain degree; the stability of the ecological cement obtained through firing is good; and the performance of the prepared ecological cement meets the performance indexes of P.O 42.5 ordinary Portland cement prescribed in General-purpose Portland Cement GB175-2007.

Description

technical field [0001] The invention belongs to the technical field of solid waste disposal and comprehensive utilization, and in particular relates to a green ecological cement using waste residue from a ready-mixing plant as a raw material and a production method thereof. Background technique [0002] In recent years, with the acceleration of industrialization and urbanization in our country, the rapid development of commercial concrete industry has led to an increase in the amount of concrete used. China's annual concrete output accounts for 45% of the world's total annual output. At present, China's annual output of waste concrete is 100-200 million tons, and it is estimated that 2 billion tons of waste concrete will be produced by 2020. In contrast, the recycling rate of construction waste in my country is only about 5%, and most of the waste concrete is directly landfilled or even illegally dumped, which is a huge gap compared with the high recycling rate of developed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/26C04B7/36
CPCC04B7/246C04B7/26C04B7/36Y02P40/10
Inventor 代飞王军赵日煦张恒春黄汉洋杨文吴雄
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD