CN103803830B - 一种再生微粉的活化处理方法 - Google Patents
一种再生微粉的活化处理方法 Download PDFInfo
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- CN103803830B CN103803830B CN201410026178.3A CN201410026178A CN103803830B CN 103803830 B CN103803830 B CN 103803830B CN 201410026178 A CN201410026178 A CN 201410026178A CN 103803830 B CN103803830 B CN 103803830B
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- 239000000843 powder Substances 0.000 title claims abstract description 21
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000003213 activating effect Effects 0.000 title claims abstract description 5
- 239000002893 slag Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 239000004568 cement Substances 0.000 description 11
- 239000003595 mist Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- GVXIVWJIJSNCJO-UHFFFAOYSA-L aluminum;calcium;sulfate Chemical compound [Al+3].[Ca+2].[O-]S([O-])(=O)=O GVXIVWJIJSNCJO-UHFFFAOYSA-L 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
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Classifications
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明涉及一种再生微粉的活化处理方法。所述处理办法具体为:将70-80%的再生微粉,20-30%矿渣粉,在常温下混合均匀,加热至850-950℃,并保持2-4h,冷却至室温后研磨处理。
Description
技术领域
本发明涉及一种再生微粉的活化处理方法。
技术背景
在城市拆迁的过程中,产生数量巨大的建筑垃圾,在对建筑垃圾的回收处理中,主要产品分为建筑垃圾再生骨料和建筑垃圾再生微粉。建筑垃圾微粉是由拆迁产生的,其中的惰性成分比较多,将其用于混凝土中,对强度有一定的影响,本发明将其进行活化,用于混凝土中,将会产生较好的效果。
发明内容
建筑垃圾再生微粉是建筑拆迁形成的产物,其中的成分主要包括水化硅酸钙凝胶、水化硫酸铝钙、氢氧化钙、水化铝酸钙等凝胶,以及由于在服役过程中由于碳化形成的碳酸钙等物质。
再生微粉的活化处理步骤为:将70-80%的再生微粉,20-30%矿渣粉,在常温下混合均匀,使得矿渣粉均匀的分布于再生微粉中。加热至850-950℃进行煅烧,并在该温度段保持2-4h,煅烧的主要目的是各类凝胶的脱水处理,并除去混合物中的氯化钙,分解碳酸钙,以及氢氧化钙的分解,并促进矿渣粉中活性二氧化硅与氧化钙反应生成硅酸钙的化学反应。高温处理完成后,混合物会轻微结块,需要研磨,比表面积大于400m2/kg的微粉活性较好。比表面积越大,活性越好。
具体实施方式:
经过高温加热,冷却研磨后的微粉的强度检验是以水泥胶砂实验中加入微粉225g,水泥225g,标准砂1350g,水225g与纯水泥标准样对比得出,此处纯水泥标准样为水泥(与测试微粉强度所用水泥为同一批次水泥)450g,标准砂1350g,水225g。所得结果为加入微粉试样的强度与纯水泥标准样的强度之比,制备及养护方法按照国标GB175-2006以及GB/T18046-2008所述进行操作。
实施例1:70%的再生微粉,30%矿渣粉经900℃高温处理3h,冷却研磨30min,测得比表面积为440m2/kg,水泥胶砂实验中微粉225g,水泥225g,标准砂1350g,水225g,测得三天强度(跟纯水泥标准样对照)89%,七天强度94%,28天强度103%。
实施例2:76%的再生微粉,24%矿渣粉经870℃处理4h,冷却研磨30min,测得比表面积为420m2/kg,水泥胶砂实验中微粉225g,水泥225g,标准砂1350g,水225g,测得三天强度(跟纯水泥标准样对照)92%,七天强度96%,28天强度100%。
Claims (1)
1.一种再生微粉的活化处理方法,其特征在于:将70-80%的再生微粉,20-30%的矿渣粉,在常温下混合均匀,加热至850-950℃,并保持2-4h,冷却至室温后研磨处理,研磨得到的粉体比表面积大于400m2/kg。
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CN108117285B (zh) * | 2017-12-01 | 2021-01-19 | 深圳市华威环保建材有限公司 | 一种建筑渣土的活化方法 |
CN111116142B (zh) * | 2019-12-31 | 2021-12-31 | 同济大学 | 一种利用建筑弃土烧结微粉制备的生态混凝土及其混凝土制品的制备方法 |
CN112047651A (zh) * | 2020-09-15 | 2020-12-08 | 浙江绿农生态环境有限公司 | 利用建筑垃圾制备的可替代水泥的胶凝材料及其制备方法 |
CN115626796B (zh) * | 2022-09-08 | 2023-11-24 | 深圳市衡骏环保科技有限公司 | 一种再生骨料自密实混凝土 |
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KR100693950B1 (ko) * | 2005-09-22 | 2007-03-12 | 경상대학교산학협력단 | 폐콘크리트 슬러지를 이용한 건설용의 콘크리트 혼화제의 제조방법 |
CN1990410B (zh) * | 2005-12-27 | 2010-10-13 | 尹小林 | 废弃混凝土活化再生水泥方法 |
CN100391881C (zh) * | 2006-06-01 | 2008-06-04 | 武汉理工大学 | 一种复合胶凝材料及其制备方法 |
CN101905954B (zh) * | 2010-07-20 | 2012-12-05 | 昆明理工大学 | 用建筑垃圾制成的胶凝材料及其制备方法 |
CN102838302B (zh) * | 2012-09-04 | 2013-10-16 | 浙江大学宁波理工学院 | 建筑垃圾再生微粉的活化方法 |
CN103466973B (zh) * | 2013-09-27 | 2015-12-23 | 上海市建筑科学研究院(集团)有限公司 | 一种废旧混凝土超细再生活性微粉及其制备方法 |
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