Cementing material using construction waste as main component and preparation method of cementing material

A technology for cementitious materials and construction waste, applied in the field of cementitious materials and their preparation, can solve the problems of high engineering cost, complex method, low utilization rate, etc., and achieve the effects of simple process, pressure relief and cost saving.

Inactive Publication Date: 2019-07-09
HUNAN YUNZHONG REGENERATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the low utilization rate of 0-4.75mm particle size after construction waste is crushed, the existing method of using construction waste to prepare cementitious materials is complicated, and the cost is high, and combined with the excessive cement consumption in my country's construction industry, resulting in excessive engineering costs. Advanced problem, to provide a kind of cementitious material with construction waste as the main component, its preparation process is simple, and the cost is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A cementitious material with construction waste as the main component, the cementitious material is mainly composed of the following components in mass fraction:

[0032] 40 parts of brick-concrete micropowder

[0033] Concrete powder 30 parts

[0034] 14 parts of slag fine powder

[0035] 10 parts of cement

[0036] Sodium hydroxide 2 parts

[0037] 4 parts water glass

[0038] Among the above-mentioned cementitious materials, brick-concrete micropowder and concrete micropowder are construction waste. After crushing, the particles with a particle size of 0-4.75mm are used for ball milling. After ball milling, the specific surface area of ​​the micropowder is greater than 300m 2 / kg; slag powder is obtained by grinding blast furnace iron slag; brick mix powder, concrete powder, slag and cement should be fully dried.

[0039] The relevant index test will be carried out on the above-mentioned cementitious materials as follows:

[0040] 1. Refer to JTG E30-2005 "Test...

Embodiment 2

[0043] A cementitious material with construction waste as the main component, the cementitious material is mainly composed of the following components in mass fraction:

[0044] 25 parts of brick-concrete micropowder

[0045] Concrete powder 40 parts

[0046] 25 parts of slag fine powder

[0047] 7 parts of cement

[0048] Sodium hydroxide 1 part

[0049] 2 parts water glass

[0050]Among the above-mentioned cementitious materials, brick-concrete micropowder and concrete micropowder are construction waste. After crushing, the particles with a particle size of 0-4.75mm are used for ball milling. After ball milling, the specific surface area of ​​the micropowder is greater than 300m 2 / kg; slag powder is obtained by grinding blast furnace iron slag; brick mix powder, concrete powder, slag and cement should be fully dried.

[0051] The relevant index test will be carried out on the above-mentioned cementitious materials as follows:

[0052] The relevant test method is the s...

Embodiment 3

[0054] A cementitious material with construction waste as the main component, the cementitious material is mainly composed of the following components in mass fraction:

[0055] 30 parts of brick concrete powder

[0056] Concrete powder 30 parts

[0057] 24 parts of slag fine powder

[0058] 10 parts of cement

[0059] Calcium hydroxide 2 parts

[0060] 4 parts calcium chloride

[0061] Among the above-mentioned cementitious materials, brick-concrete micropowder and concrete micropowder are construction waste. After crushing, the particles with a particle size of 0-4.75mm are used for ball milling. After ball milling, the specific surface area of ​​the micropowder is greater than 300m 2 / kg; slag powder is obtained by grinding blast furnace iron slag; brick mix powder, concrete powder, slag and cement should be fully dried.

[0062] The relevant index test will be carried out on the above-mentioned cementitious materials as follows:

[0063] 1. Refer to JTG E30-2005 "Cem...

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Abstract

The invention discloses a cementing material using construction waste as a main component and a preparation method of the cementing material. The material comprises brick-concrete micropowder, concrete micropowder, mineral slag micropowder, cement, and one of an additive combination of sodium hydroxide and water glass and an additive combination of calcium chloride and calcium hydroxide. The setting time and volume stability of the cementing material provided by the invention all meet the relevant cement standards, and the compressive strength and flexural strength for 3 days and 28 days reachPC32.5-grade strength; and compared with traditional cement, the cementing material provided by the invention has an obvious price advantage, is used in a large scale, can greatly alleviate pressureon the urban environment by the construction waste, and has social benefits far greater than economic benefits.

Description

technical field [0001] The invention relates to the technical field of recycling of construction waste, in particular to a gelling material mainly composed of construction waste and a preparation method thereof. Background technique [0002] According to statistics, my country produces about 2.6 billion tons of construction waste every year, which will reach its peak in 2020, and the recycling rate of construction waste is less than 10%, while the utilization rate of construction waste sent to countries such as the United States, Japan, South Korea, and Germany has exceeded 90%. %. At present, my country's disposal of construction waste is mainly based on landfill and open-air stacking, which seriously endangers the public environment and national safety, and the piling of construction waste requires a large amount of land, which greatly restricts the sustainable development of cities. With the increasing awareness of environmental protection among the people, most of the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B18/167C04B18/141C04B22/062C04B22/124C04B22/064C04B12/04
Inventor 吴超凡万署张继森孟凡威李泉黄倩李行周艺温广香
Owner HUNAN YUNZHONG REGENERATION TECH CO LTD
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