CN105000851A - Anti-freezing concrete preparation method by using mine tailings as aggregate - Google Patents
Anti-freezing concrete preparation method by using mine tailings as aggregate Download PDFInfo
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- CN105000851A CN105000851A CN201510409887.4A CN201510409887A CN105000851A CN 105000851 A CN105000851 A CN 105000851A CN 201510409887 A CN201510409887 A CN 201510409887A CN 105000851 A CN105000851 A CN 105000851A
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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
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Abstract
The present invention relates to a comprehensive utilization technology in the field of building materials, and in particular relates to an anti-freezing concrete preparation method by using mine tailings as an aggregate. The concrete comprises the following components in parts by weight: 20-25 parts of cement, 15-20 parts of mine tailing powder, 30-40 parts of a mine tailing aggregate, 5-10 parts of grade III fly ash, 10-15 parts of water, 1-3 parts of a mine tailing modifier, and 1.05-1.4 parts of an anti-freezing agent. After combining and stirring, the anti-freezing concrete is obtained. Compared with the prior art, the present invention has the beneficial effects: not only the problem that mine tailing waste discharge occupies a large amount of soil and pollutes the environment is solved, but also the problem of increasing shortage of concrete raw materials in the building technical field is solved, and meanwhile the problem of long setting-time for the concrete used in winter construction and the poor anti-freezing property are solved, thereby prolonging the winter time in which construction can be performed.
Description
Technical field
The present invention relates to a kind of comprehensive utilization technique of building material field, particularly relating to a kind of take mine tailing as the preparation method of the frost-resistant concrete of aggregate.
Background technology
Mine tailing is the waste that metallurgical mine enterprises produces refined iron mine powder.China's iron ore lean ore is many, so tailing waste thing is many.At present, the discharge of tailing waste thing generally adopts tailing dam (storehouse) to concentrate stacking, not only occupies a large amount of soil, and seriously pollutes environment.
Technical field of buildings, the increasing that concrete demand builds dynamics along with national basis is increasing, cause the excessive exploitation of river sand, mountain stone, not only environment and resources is caused to the destruction of irrecoverability, and the day that result in natural resources is becoming tight, scarcity.
In the northern area of China, winter time is long, and cold snap requires that concrete must have the early multiple performance such as strong, antifreeze, freeze proof, erosion resistance, to adapt to the construction of concrete under low temperature, subzero temperature.
Summary of the invention
For overcoming prior art defect, it take mine tailing as the preparation method of the frost-resistant concrete of aggregate that the technical problem that the present invention solves is to provide a kind of, both solve the discharge of tailing waste thing and take a large amount of soil and environmental pollution problem, solve again technical field of buildings concrete raw material growing tension problem, also solve concreting in cold weather simultaneously and use long, the poor problem of anti-freezing property time of coagulation, extend the winter construction activity duration.
In order to achieve the above object, the present invention realizes by the following technical solutions:
Take mine tailing as a frost-resistant concrete for aggregate, it is characterized in that, comprise the component of following part by weight: cement 20-25, mine tailing 15-20, mine tailing aggregate 30-40, III grade of flyash 5-10, water 10-15, mine tailing properties-correcting agent 1-3, frostproofer 1.05-1.4.
Described cement is ordinary Portland cement, silicate cement, Portland blast furnace slag cement, Portland fly ash cement, and grade is 32.5 or 42.5.
Described mine tailing is the waste that produces when producing fine ore, and its granularity >=280um accounts for 6%, 100um< granularity <280um accounts for 53%, 76um≤granularity≤100um-accounts for 15%, granularity <76um accounts for 26%.
Described mine tailing aggregate is for forming by producing mine tailing stone in ore extraction and ore dressing process through broken classification, and its 20mm< granularity <25mm accounts for 70%, 5mm≤granularity≤20mm accounts for 20%, below 5mm accounts for 10%.
Described mine tailing properties-correcting agent be by water reducer, swelling agent, ether of cellulose, diatomite, zeolite powder, latex powder according to a kind of compound additive of the proportions of 1.5:1.5:2:1:1:1, there is high diminishing, protect mould, excitating performance;
Wherein, water reducer is the one of naphthalene system pulvis water reducer, poly-hydroxy acid pulvis water reducer or aliphatics pulvis water reducer; Swelling agent is the one of UEA swelling agent, calcium oxide swelling agent, alum swelling agent or iron filings swelling agent; Ether of cellulose is the one of methyl cellulose ether or hydroxypropyl methyl cellulose ether.
Described frostproofer is the mixture of one or more of Sodium Nitrite, carbonate, calcium chloride, calcium nitrite, urea, ethylene glycol.
The quality index of described mine tailing properties-correcting agent, frostproofer meets " concrete admixture " (GB8076-2008), " concrete pump-feed agent " (JC473-2001) and " concrete antifreezer " (JC475-2004) standard-required.
Described a kind of take mine tailing as the preparation method of the frost-resistant concrete of aggregate, comprise the following steps:
1) mine tailing is dried to water ratio below 0.5%;
2) the mine tailing aggregate removing particle diameter and be greater than 25mm is sifted out;
3) feeding sequence when stirring: mine tailing, cement, III grade of flyash, stirs and adds mine tailing aggregate after 20 seconds and stir 20 seconds, and then add water, mine tailing properties-correcting agent and frostproofer, stir 90 seconds.
Compared with prior art, the invention has the beneficial effects as follows: both solved the discharge of tailing waste thing and taken a large amount of soil and environmental pollution problem, solve again technical field of buildings concrete raw material growing tension problem, also solve concreting in cold weather simultaneously and use long, the poor problem of anti-freezing property time of coagulation, extend the winter construction activity duration.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but protection domain not thereby limiting the invention.
[embodiment 1]
C35 frost-resistant concrete, adaptive temperature :-10 DEG C ~-15 DEG C, component formula by weight: cement 24.8, mine tailing 16, mine tailing aggregate 35, III grade of flyash 10, water 10, mine tailing properties-correcting agent 2.9 and Sodium Nitrite frostproofer 1.3.
Wherein, cement is Portland blast furnace slag cement, class 4 2.5.
Mine tailing properties-correcting agent according to a kind of compound additive of the proportions of 1.5:1.5:2:1:1:1 by naphthalene system pulvis water reducer, alum swelling agent swelling agent, ether of cellulose, diatomite, zeolite powder, latex powder, is had high diminishing, guarantor moulds, excitating performance; Ether of cellulose is methyl cellulose ether.
Described mine tailing is the waste that produces when producing fine ore, and its granularity >=280um accounts for 6%, 100um< granularity <280um accounts for 53%, 76um≤granularity≤100um-accounts for 15%, granularity <76um accounts for 26%.
Described mine tailing aggregate is for forming by producing mine tailing stone in ore extraction and ore dressing process through broken classification, and its 20mm< granularity <25mm accounts for 70%, 5mm≤granularity≤20mm accounts for 20%, below 5mm accounts for 10%.
Preparation method is as follows:
1) mine tailing is dried to water ratio below 0.5%;
2) the mine tailing aggregate removing particle diameter and be greater than 25mm is sifted out;
3) feeding sequence when stirring: mine tailing, cement, III grade of flyash, stirs and adds mine tailing aggregate after 20 seconds and stir 20 seconds, and then add water, mine tailing properties-correcting agent and frostproofer, stir and within 90 seconds, namely obtain strength grade C35 frost-resistant concrete.
[embodiment 2]
C30 frost-resistant concrete, adaptive temperature: 5 DEG C ~-5 DEG C, component formula by weight: cement 24, mine tailing 17, mine tailing aggregate 35, III grade of flyash 10, water 10, mine tailing properties-correcting agent 2.95, Sodium Nitrite frostproofer 1.05.
Wherein, cement is silicate cement, class 4 2.5.
Described mine tailing properties-correcting agent be by poly-hydroxy acid pulvis water reducer, iron filings swelling agent, ether of cellulose, diatomite, zeolite powder, latex powder according to a kind of compound additive of the proportions of 1.5:1.5:2:1:1:1, there is high diminishing, protect mould, excitating performance; Ether of cellulose is methyl cellulose ether.
[embodiment 3]
C25 frost-resistant concrete, adaptive temperature :-5 DEG C ~-10 DEG C, component formula by weight: cement 22.85, mine tailing 17, mine tailing aggregate 36, III grade of flyash 10, water 11, mine tailing properties-correcting agent 2 and Sodium Nitrite frostproofer 1.15.
Wherein, cement is Portland fly ash cement, class 4 2.5.
[embodiment 4]
C20 frost-resistant concrete, adaptive temperature :-15 DEG C ~-20 DEG C, component formula by weight: cement 22, mine tailing 18, mine tailing aggregate 36, III grade of flyash 10, mine tailing properties-correcting agent 2.6, water 10, calcium nitrite frostproofer 1.4.
Wherein, cement is Portland blast furnace slag cement, grade 32.5.
Described mine tailing properties-correcting agent be by aliphatics pulvis water reducer, alum swelling agent swelling agent, ether of cellulose, diatomite, zeolite powder, latex powder according to a kind of compound additive of the proportions of 1.5:1.5:2:1:1:1, there is high diminishing, protect mould, excitating performance; Ether of cellulose is methyl cellulose ether.
In embodiment 2-4, described mine tailing is the waste that produces when producing fine ore, and its granularity >=280um accounts for 6%, 100um< granularity <280um accounts for 53%, 76um≤granularity≤100um-accounts for 15%, granularity <76um accounts for 26%.
Described mine tailing aggregate is for forming by producing mine tailing stone in ore extraction and ore dressing process through broken classification, and its 20mm< granularity <25mm accounts for 70%, 5mm≤granularity≤20mm accounts for 20%, below 5mm accounts for 10%.
Its preparation method is all with embodiment 1.
The quality index of described mine tailing properties-correcting agent, frostproofer meets " concrete admixture " (GB8076-2008), " concrete pump-feed agent " (JC473-2001) and " concrete antifreezer " (JC475-2004) standard-required.
Measure the performance perameter of frost-resistant concrete described in embodiment 1-4: the slump, compressive strength rate measuring method adopt this area ordinary method to measure, and measurement result is in table 1.
Table 1, the performance perameter of frost-resistant concrete described in embodiment 1-4
Claims (8)
1. one kind take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, comprise the component of following part by weight: cement 20-25, mine tailing 15-20, mine tailing aggregate 30-40, III grade of flyash 5-10, water 10-15, mine tailing properties-correcting agent 1-3, frostproofer 1.05-1.4.
2. according to claim 1 a kind of take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, described cement is ordinary Portland cement, silicate cement, Portland blast furnace slag cement, Portland fly ash cement, and grade is 32.5 or 42.5.
3. according to claim 1 a kind of take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, described mine tailing is the waste that produces when producing fine ore, and its granularity >=280um accounts for 6%, 100um< granularity <280um accounts for 53%, 76um≤granularity≤100um-accounts for 15%, granularity <76um accounts for 26%.
4. according to claim 1 a kind of take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, described mine tailing aggregate is for forming by producing mine tailing stone in ore extraction and ore dressing process through broken classification, and its 20mm< granularity <25mm accounts for 70%, 5mm≤granularity≤20mm accounts for 20%, below 5mm accounts for 10%.
5. according to claim 1 a kind of take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, described mine tailing properties-correcting agent be by water reducer, swelling agent, ether of cellulose, diatomite, zeolite powder, latex powder according to a kind of compound additive of the proportions of 1.5:1.5:2:1:1:1, there is high diminishing, protect mould, excitating performance;
Wherein, water reducer is the one of naphthalene system pulvis water reducer, poly-hydroxy acid pulvis water reducer or aliphatics pulvis water reducer; Swelling agent is the one of UEA swelling agent, calcium oxide swelling agent, alum swelling agent or iron filings swelling agent; Ether of cellulose is the one of methyl cellulose ether or hydroxypropyl methyl cellulose ether.
6. according to claim 1 a kind of take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, described frostproofer is the mixture of one or more of Sodium Nitrite, carbonate, calcium chloride, calcium nitrite, urea, ethylene glycol.
7. a kind of according to claim 5,6 take mine tailing as the frost-resistant concrete of aggregate, it is characterized in that, the quality index of described mine tailing properties-correcting agent, frostproofer meets " concrete admixture " (GB8076-2008), " concrete pump-feed agent " (JC473-2001) and " concrete antifreezer " (JC475-2004) standard-required.
8. realize according to claim 1 a kind of take mine tailing as the preparation method of the frost-resistant concrete of aggregate, it is characterized in that, comprise the following steps:
1) mine tailing is dried to water ratio below 0.5%;
2) the mine tailing aggregate removing particle diameter and be greater than 25mm is sifted out;
3) feeding sequence when stirring: mine tailing, cement, III grade of flyash, stirs and adds mine tailing aggregate after 20 seconds and stir 20 seconds, and then add water, mine tailing properties-correcting agent and frostproofer, stir 90 seconds.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272042A (en) * | 2015-11-02 | 2016-01-27 | 中国三冶集团有限公司 | Anti-freezing and anti-cracking concrete |
| CN105272015A (en) * | 2015-11-05 | 2016-01-27 | 中国三冶集团有限公司 | Anti-freezing anti-cracking anti-leaking mortar |
| CN105384405A (en) * | 2015-11-16 | 2016-03-09 | 中国三冶集团有限公司 | Method for preparing anti-freezing concrete |
| CN105645853A (en) * | 2016-01-14 | 2016-06-08 | 南通铁跃建材科技有限公司 | Application of tailing machine-made sand winnowing powder in premixed concrete |
| CN106007566A (en) * | 2016-05-19 | 2016-10-12 | 中国三冶集团有限公司 | Antifreezing anti-cracking thermal insulation mortar containing rice hull powder and preparation method thereof |
| CN106284216A (en) * | 2016-08-31 | 2017-01-04 | 付智 | Frost-resistant concrete dam |
| CN108129060A (en) * | 2017-12-28 | 2018-06-08 | 安徽金丰新型建材有限公司 | A kind of frost-resistant concrete |
| CN109574598A (en) * | 2019-01-29 | 2019-04-05 | 山东承坤信息科技有限公司 | A kind of preparation process of environment-friendlydurable durable construction material |
| CN109867502A (en) * | 2019-04-10 | 2019-06-11 | 东北大学 | A kind of impervious iron tailing concrete and preparation method thereof |
| CN110144783A (en) * | 2019-04-26 | 2019-08-20 | 福建省昊立建设工程有限公司 | A kind of roadbed construction method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105272042B (en) * | 2015-11-02 | 2017-07-18 | 中国三冶集团有限公司 | A kind of antifreeze anti-crack concrete |
| CN105272042A (en) * | 2015-11-02 | 2016-01-27 | 中国三冶集团有限公司 | Anti-freezing and anti-cracking concrete |
| CN105272015A (en) * | 2015-11-05 | 2016-01-27 | 中国三冶集团有限公司 | Anti-freezing anti-cracking anti-leaking mortar |
| CN105384405A (en) * | 2015-11-16 | 2016-03-09 | 中国三冶集团有限公司 | Method for preparing anti-freezing concrete |
| CN105645853A (en) * | 2016-01-14 | 2016-06-08 | 南通铁跃建材科技有限公司 | Application of tailing machine-made sand winnowing powder in premixed concrete |
| CN106007566A (en) * | 2016-05-19 | 2016-10-12 | 中国三冶集团有限公司 | Antifreezing anti-cracking thermal insulation mortar containing rice hull powder and preparation method thereof |
| CN106284216A (en) * | 2016-08-31 | 2017-01-04 | 付智 | Frost-resistant concrete dam |
| CN108129060A (en) * | 2017-12-28 | 2018-06-08 | 安徽金丰新型建材有限公司 | A kind of frost-resistant concrete |
| CN109574598A (en) * | 2019-01-29 | 2019-04-05 | 山东承坤信息科技有限公司 | A kind of preparation process of environment-friendlydurable durable construction material |
| CN109867502A (en) * | 2019-04-10 | 2019-06-11 | 东北大学 | A kind of impervious iron tailing concrete and preparation method thereof |
| CN109867502B (en) * | 2019-04-10 | 2021-07-23 | 东北大学 | Impervious iron tailing concrete and preparation method thereof |
| CN110144783A (en) * | 2019-04-26 | 2019-08-20 | 福建省昊立建设工程有限公司 | A kind of roadbed construction method |
| CN110144783B (en) * | 2019-04-26 | 2020-04-28 | 福建省昊立建设工程有限公司 | Roadbed construction method |
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