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Recycled concrete commercial mortar

A technology of recycled concrete and commercial mortar, which is applied in the field of cement-based materials, can solve the environmental protection pressure of power companies and the shortage of resources in building materials companies. To alleviate problems such as adjustable setting time, good environmental coordination, and good workability

Inactive Publication Date: 2013-07-24
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on the application of recycled fine aggregate and recycled concrete powder is not yet mature. A large amount of waste concrete, aluminum slag and alkali slag cannot be properly treated and utilized for a long time, which has caused a great impact on the surrounding environment. In addition, power companies The ineffective use of desulfurized gypsum and the increasing demand for building material resources in modern times have resulted in the long-term failure of effective solutions to the environmental pressure of power companies and the pressure of resource shortages for building material companies, and the long-term failure to reduce the burden of corporate waste discharge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select the following components by weight percentage to prepare recycled concrete commercial mortar: recycled concrete powder 15%; recycled concrete fine aggregate 60%; desulfurized gypsum 7%; alkali slag 10%; water-washed slurry 3%; Portland cement clinker 3% ; Aluminum slag 1%; Admixture (sodium silicate) 1%.

[0023] The recycled concrete micropowder is produced during the production of recycled concrete coarse aggregates with a particle size of less than 0.23 mm, which is activated and ball milled until the specific surface area is greater than 450 mm 2 / kg.

[0024] The activation treatment method of the recycled concrete powder, the specific steps include:

[0025] (1) Mix the recycled concrete powder with a particle size of less than 0.23mm and lime mechanical activation, that is, mechanical grinding. The lime content is 5% to 15% of the total weight of the mixture, and the rest is recycled concrete powder. Grind at room temperature until the obtained Powde...

Embodiment 2

[0035] Select the following components by weight percentage to prepare recycled concrete commercial mortar: recycled concrete powder 15%; recycled concrete fine aggregate 50%; desulfurized gypsum 8%; alkali slag 15%; water-washed slurry 4%; Portland cement clinker 4% ; Aluminum slag 3%; Admixture (a mixture of sodium silicate and sulfoaluminate) 1%.

[0036] The recycled concrete micropowder is formed by activating and ball-milling pellets smaller than 0.23 mm produced during the production of recycled concrete coarse aggregate, and ball-milling until the specific surface area is greater than 450 mm 2 / kg.

[0037] The activation treatment method of the recycled concrete powder, the specific steps include:

[0038] (1) Mix the recycled concrete powder with a particle size of less than 0.23mm and lime mechanical activation, that is, mechanical grinding. The lime content is 5% to 15% of the total weight of the mixture, and the rest is recycled concrete powder. Grind at room...

Embodiment 3

[0047] Select the following components by weight percentage to prepare recycled concrete commercial mortar: recycled concrete powder 20%; recycled concrete fine aggregate 52%; desulfurized gypsum 10%; alkali slag 10%; water-washed slurry 3%; Portland cement clinker 3% ; Aluminum slag 1.5%; Admixture (sulfoaluminate) 0.5%.

[0048] The recycled concrete micropowder is formed by activating and ball-milling pellets smaller than 0.23 mm produced during the production of recycled concrete coarse aggregate, and ball-milling until the specific surface area is greater than 450 mm 2 / kg.

[0049] The activation treatment method of the recycled concrete powder, the specific steps include:

[0050] (1) Mix the recycled concrete powder with a particle size of less than 0.23mm and lime mechanical activation, that is, mechanical grinding. The lime content is 5% to 15% of the total weight of the mixture, and the rest is recycled concrete powder. Grind at room temperature until the obtai...

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Abstract

The invention discloses recycled concrete commercial mortar which consists of the following components in percentage by weight: 15-25% of recycled concrete micro powder, 50-60% of recycled concrete fine aggregate, 7-10% of desulfurized gypsum, 10-15% of caustic sludge, 3-5% of washing slurry, 3-5% of portland cement clinker, 1-3% of aluminum slag and 0.5-1.5% of additive. The recycled concrete commercial mortar disclosed by the invention relieves the environmental protection stress on the urban construction, alkali production and power enterprises and the stress in lack of resources of building material enterprises, reduces the burden of waste discharge on enterprises, increases the income and improves the ecological environment.

Description

technical field [0001] The invention relates to a cement-based material, in particular to a recycled concrete commercial mortar. Background technique [0002] Abandoned concrete is the solid waste produced in the process of urban construction, while recycled fine aggregate and recycled concrete powder are by-products in the process of using waste concrete to produce recycled coarse aggregate; The solid waste produced is one of the industrial wastes; the aluminum slag is the waste produced in the production process of electrolytic aluminum. The research on the application of recycled fine aggregate and recycled concrete powder is not yet mature. A large amount of waste concrete, aluminum slag and alkali slag cannot be properly treated and utilized for a long time, which has caused a great impact on the surrounding environment. In addition, power companies The lack of effective use of desulfurized gypsum and the increasing demand for building material resources in modern time...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/16
CPCY02W30/91
Inventor 孙家瑛俞楠刘飞谢京来
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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