CN103011649A - Method for preparing concrete regenerated active powder by using construction wastes - Google Patents

Method for preparing concrete regenerated active powder by using construction wastes Download PDF

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Publication number
CN103011649A
CN103011649A CN2012105088382A CN201210508838A CN103011649A CN 103011649 A CN103011649 A CN 103011649A CN 2012105088382 A CN2012105088382 A CN 2012105088382A CN 201210508838 A CN201210508838 A CN 201210508838A CN 103011649 A CN103011649 A CN 103011649A
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CN
China
Prior art keywords
powder
concrete
construction wastes
percent
active powder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012105088382A
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Chinese (zh)
Inventor
张瑞军
王海燕
孙皓
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GUANGZHOU SHIZHENG ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Original Assignee
GUANGZHOU SHIZHENG ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by GUANGZHOU SHIZHENG ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd filed Critical GUANGZHOU SHIZHENG ENVIRONMENTAL PROTECTION SCIENCE AND TECHNOLOGY DEVELOPMENT Co Ltd
Priority to CN2012105088382A priority Critical patent/CN103011649A/en
Publication of CN103011649A publication Critical patent/CN103011649A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a method for preparing concrete regenerated active powder by using construction wastes, namely, building rubbishes. The granular fineness of the powder is smaller than 25.0 micrometer, the activity index (28d) is more than 72 percent, the water demand ratio is less than 105 percent, the ignition loss is less than 8.0 percent, and the water content is less than 1.0 percent. By adopting the method, an admixture and the like which accord with the national standard grade II fly ash standard for concrete can be directly prepared by taking the construction wastes as a raw material through using the conventional crushing, peeling and grinding production lines. Stones, sand and cement powder of old concrete in the construction wastes and clay bricks in the construction wastes are separated, so that the use activity of the construction wastes is improved; and the construction wastes with different properties in different areas are modulated by using chemical agents to ensure that the balance generality of a product is high, so that the method is suitable for wide application range and industrial popularization.

Description

A kind of method of utilizing building castoff to prepare the active powder of concrete regenerating
Technical field
The present invention relates to the comprehensive utilization field of building castoff, be specifically related to a kind ofly utilize building castoff to prepare active high, water requirement and the loss on ignition performance is good, good fluidity, the method for pellet fineness below 25 μ m.
Background technology
Along with the development of economy and Urbanization Construction, old building transforming and dismounting, new building are built, the speed of infrastructure construction is also constantly accelerated.According to statistics, 400,000,000 square metres of old buildings of the annual dismounting of China, producing building castoff is about 500,000,000 tons of building waste; 2,000,000,000 square metres of annual new buildings produce building waste greater than 100,000,000 tons; Annual finishing 2,000 ten thousand cover new houses produce 4,000 ten thousand tons of building wastes.At present, the annual emissions of China's building waste is above 6.4 hundred million tons.
So a large amount of building wastes is direct landfill as not dealing carefully with, both polluted water soil resource and air ambient, tie up the soil, waste again the Mineral resources of China's preciousness, seriously hinder the sustainable development of China's industry.Therefore, the recycling of building waste has become the target that government and relevant industries and scientific worker are dreamed of.
Up to now, about the report of made from construction refuse resource utilization has: 1, a kind of building castoff that utilizes prepares concrete and cement with the method (patent No.: 201110236361) of active admixture; 2, utilize the regeneration aggregate half lowslump concrete and preparation method thereof (patent No.: 201110239638) of building castoff preparation; 3, the regenerative gel material for building for preparing with the building castoff and preparation method thereof (patent No.: 201110252853); 4, high-activity fine steelslag powder as additive of concrete and prepare the concrete method (patent No.: 00124822); 5, the building waste recycling is produced the method (CN.201110132550.5) of cement products etc.But these technology are take 70% following building castoff and cement or abandoned mine slag etc. as binding agent, by modification and mortar, cement admixture etc.Because the building castoff amount is large, the building castoff composition of different zones is different; The complicated that these preparation methods add, comprehensive technical indexes is difficult to reach the utilization standard of commerical ready-mixed concrete II level flyash, and is difficult to reach the product general character and uses in a large number.
In addition, the part take building castoff as raw material makes stone and cement sand ash content from the technical finesse with the clay brick grinding report be arranged not yet at home by the roller mill waste concrete block.
It is high that existing made from construction refuse resource utilizes technology also to exist the service requirements of construction waste raw material, the problems such as the products production cost is high, value added is low, be not suitable for the use of commerical ready-mixed concrete, be difficult to extensive popularization, be difficult to satisfy a large amount of made from construction refuse resource that discharge and utilize demand.Therefore, take building castoff as raw material, it is high to develop a kind of building castoff utilization ratio, and the technology of preparing of the active powder of the regeneration concrete that Product Activity is good, the loss on ignition performance is good, the water requirement performance reaches II level flyash national standard has very important social and economic significance.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned the deficiencies in the prior art, provide a kind of building castoff utilization ratio high, the active powder preparation method of the concrete regenerating of good product performance.
Purpose of the present invention is achieved through the following technical solutions:
A kind of active powder of concrete regenerating that utilizes the building castoff preparation, its pellet fineness is below 25 μ m, and activity index (28d) is more than 72%, and water demand ratio is below 105%, and loss on ignition is below 8.0%, and water content is below 1.0%.
The preparation method of the active powder of concrete regenerating of the present invention may further comprise the steps:
(1) at first that the construction waste raw material is broken by one-level Hubei Province formula, sorting, except obtaining coarse fodder after soil, deironing screening, the oven dry, then coarse fodder is carried out middle pressure roller mill so that with concrete blocks and clay block crushing, stone is separated screening with the integument cement block, at last the integument cement block is entered high pressure roller mill with the clay block of crushing or ball milling prepares the pellet fineness less than 200 purpose powders.
(2) according to the mass fraction, take by weighing 85 ~ 90 parts of building waste powders, 0 ~ 5 part of concrete additive, 5 ~ 10 parts of cinders; Above-mentioned raw materials is mixed, after the ball milling granulation, make even powder.
Compared with prior art, advantage and beneficial effect that the present invention has comprise: different types of building castoff is given birth to grog separately by powder, adds additive according to the index needs behind the grinding; Make its powder characteristic reach steady general character and service requirements, be easy to Industry Promotion.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail:
Embodiment
According to the mass fraction, take by weighing 85 ~ 90 parts of building waste powders, 5 parts of additives, 5 ~ 10 parts of cinders; Above-mentioned raw materials is mixed, cross 200 mesh sieves through ball milling, make even powder.
Sample pellet fineness is below 25.0 μ m after the preparation, and activity index (28d) is more than 72%, and water demand ratio is below 105%, and loss on ignition is below 8.0%, and water content is below 1.0%.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (4)

1. active powder of concrete regenerating that utilizes building castoff preparation, it is characterized in that: the activity index of described active powder (28d) is more than 72%, and water demand ratio is below 105%, and loss on ignition is below 8.0%, and water content is below 1.0%.
2. the active powder of concrete regenerating according to claim 1, it is characterized in that: the preparation method of this powder may further comprise the steps: at first that the construction waste raw material is broken by one-level Hubei Province formula, sorting, except obtaining coarse fodder after soil, deironing screening, the oven dry, then coarse fodder is carried out middle pressure roller mill so that with concrete blocks and clay block crushing, stone is separated screening with the integument cement block, at last the integument cement block is carried out high pressure roller mill with the clay block of crushing or ball milling obtains the pellet fineness less than 200 purpose powders; According to the mass fraction, take by weighing 85 ~ 90 parts of above-mentioned building waste powders, 0 ~ 5 part of concrete additive, 5 ~ 10 parts of cinders fully mix it, make even powder after the ball milling granulation.
3. preparation method according to claim 2 is characterized in that: the effect of described middle pressure roller mill is that stone is separated, and the powder raw material activity can not reduced; Ball milling is dry ball milling.
4. preparation method according to claim 2 is characterized in that: the active powder characteristic of the concrete regenerating that described preparation method produces is good, active high, and overall target reaches the reinforcement of concrete II level flyash national standard, is easy to Industry Promotion.
CN2012105088382A 2012-12-04 2012-12-04 Method for preparing concrete regenerated active powder by using construction wastes Pending CN103011649A (en)

Priority Applications (1)

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CN2012105088382A CN103011649A (en) 2012-12-04 2012-12-04 Method for preparing concrete regenerated active powder by using construction wastes

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CN103011649A true CN103011649A (en) 2013-04-03

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103193428A (en) * 2013-04-19 2013-07-10 李迎春 Novel roadbed composite material and production and application methods thereof
CN103896504A (en) * 2014-03-05 2014-07-02 咸阳轩朗建材有限公司 Method of preparing coal ash by utilizing coal slag and construction waste
CN104276774A (en) * 2014-09-23 2015-01-14 廊坊荣盛混凝土有限公司 Novel concrete admixture produced by utilizing waste concrete and mortar
CN104591690A (en) * 2013-10-30 2015-05-06 徐小芹 Garbage processing and brickmaking technological process
CN105060755A (en) * 2015-07-29 2015-11-18 广州世正环保科技发展有限公司 High performance concrete composite mineral additive prepared from construction wastes and preparation method thereof
CN107235646A (en) * 2017-05-23 2017-10-10 贵州师范大学 Concrete regenerating powder microdilatancy eco-cement and preparation method thereof
CN110734256A (en) * 2019-11-15 2020-01-31 扬州大学 foam concrete doped with recycled brick powder and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1473787A (en) * 2003-08-09 2004-02-11 同济大学 Inorganic regenerated concrete mixture and its preparing method
CN102218435A (en) * 2011-04-19 2011-10-19 上海德滨环保科技有限公司 Method for recycling waste clay

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1473787A (en) * 2003-08-09 2004-02-11 同济大学 Inorganic regenerated concrete mixture and its preparing method
CN102218435A (en) * 2011-04-19 2011-10-19 上海德滨环保科技有限公司 Method for recycling waste clay

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103193428A (en) * 2013-04-19 2013-07-10 李迎春 Novel roadbed composite material and production and application methods thereof
CN103193428B (en) * 2013-04-19 2015-05-27 李迎春 Novel roadbed composite material and production and application methods thereof
CN104591690A (en) * 2013-10-30 2015-05-06 徐小芹 Garbage processing and brickmaking technological process
CN103896504A (en) * 2014-03-05 2014-07-02 咸阳轩朗建材有限公司 Method of preparing coal ash by utilizing coal slag and construction waste
CN103896504B (en) * 2014-03-05 2016-01-20 咸阳轩朗建材有限公司 A kind of method utilizing cinder and building waste to prepare flyash
CN104276774A (en) * 2014-09-23 2015-01-14 廊坊荣盛混凝土有限公司 Novel concrete admixture produced by utilizing waste concrete and mortar
CN105060755A (en) * 2015-07-29 2015-11-18 广州世正环保科技发展有限公司 High performance concrete composite mineral additive prepared from construction wastes and preparation method thereof
CN107235646A (en) * 2017-05-23 2017-10-10 贵州师范大学 Concrete regenerating powder microdilatancy eco-cement and preparation method thereof
CN110734256A (en) * 2019-11-15 2020-01-31 扬州大学 foam concrete doped with recycled brick powder and preparation method thereof

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Application publication date: 20130403

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