CN102173684A - Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof - Google Patents
Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof Download PDFInfo
- Publication number
- CN102173684A CN102173684A CN2011100318877A CN201110031887A CN102173684A CN 102173684 A CN102173684 A CN 102173684A CN 2011100318877 A CN2011100318877 A CN 2011100318877A CN 201110031887 A CN201110031887 A CN 201110031887A CN 102173684 A CN102173684 A CN 102173684A
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- concrete
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- coarse aggregate
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- mineral admixture
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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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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a building material, in particular relating to a high-property concrete and a preparation method thereof. The concrete prepared from tunnel waste slag and a mineral admixture with a large mixing amount comprises the following components in parts by weight: 250-270 parts of cement, 1000-1100 parts of coarse aggregate, 700-750 parts of sand, 70-90 parts of coal ash, 140-160 parts of ore powder, 5-6 parts of additive and 150-160 parts of water. In the process of preparing the high-property concrete, the mineral admixture with the large mixing amount and a polycarboxylic acid water reducing agent are compounded so as to reduce the hydration heat and shrinkage of the concrete and optimize the pore structure of the concrete, and the strength of the concrete and the infiltration capacity of corrosion resistant ions are comprehensively improved through optimizing the coarse aggregate and the sand. The high-property concrete has the obvious characteristics of environmental friendliness, low carbon, high ion corrosion resistance, high early strength and the like.
Description
Technical field
The present invention relates to a kind of material of construction, relate in particular to a kind of high performance concrete and this concrete preparation method.
Background technology
Concrete is to use the most extensive, that application quantity is maximum a kind of material in the current material of construction, and it can be mixed with varying strength, different performance and difform various buildings.But because influence, the construction quality of the envrionment conditions of buildings are not good or design improperly, tend to produce all harm, reduce the quality of structure, reduction of service life.
Subbottom tunnel, massif tunnel will dig out a large amount of rock wastes in construction process, traditional method is that these wastes are used for air storage, fill out the sea or fill roadbed, might cause atmosphere, water body and soil pollution like this.Meanwhile, also need a large amount of high-quality aggregates to prepare high performance concrete in the Tunnel Engineering of building.For this reason, the part engineering waste simple crushing of will constructing is used to prepare sprayed concrete, substrate concrete of low strength grade etc., but its intensity, endurance quality and ecological performance all can not satisfy the requirement of modern Tunnel Engineering to the high-performance lining concrete.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defective, and the high performance concrete of a kind of tunnel waste with big volume mineral preparation is provided, and it can prepare the high performance concrete that intensity reaches C50, workability, endurance quality excellence.
For achieving the above object, the present invention adopts following technical scheme: the weight content of its each component is: cement 250-270 part, coarse aggregate 1000-1100 part, sand 700-750 part, flyash 70-90 part, breeze 140-160 part, admixture 5-6 part, water 150-160 part.
The present invention has carried out effective art breading to the constructing tunnel waste, and sets up the control corresponding index.High performance concrete of the present invention contains mud and clod amount≤1.5%, soluble chloride ion content≤0.01%.Its tap density reaches greater than 1480kg/m
3, voidage is suitable≤45%, and faller gill shape particle total content is suitable≤and 10%.The preparation high performance concrete utilized the construction waste as coarse aggregate, mineral admixture greater than 40% of binder total amount.Strength grade of concrete reaches C50, workability, endurance quality excellence.
Described cement preferably adopts strength grade 52.5 silicate cements.
Described coarse aggregate preferably adopts the constructing tunnel waste, and the cobble-stone diameter after the fragmentation of construction waste is 5-25mm.
Described sand preferably adopts the river sand of fineness modulus 2.4-3.0, and its cement content is not more than 2%.
Described flyash preferably adopts I level flyash.
Described breeze preferably adopts S95 or S105 breeze.
Described admixture is preferably poly-hydroxy acid water reducer, and its water-reducing rate is not less than 30%.
Another object of the present invention provides a kind of preparation method of above-mentioned high performance concrete, and it comprises the steps:
(1) the construction waste prepares high-quality coarse aggregate;
(2) starting material are chosen;
(3) at normal temperatures and pressures, mix stirring 1-3min with cement, flyash, breeze, coarse aggregate, sand;
(4) add admixture and water, continue to stir 1-3min, promptly can be made into high performance concrete.
The construction waste prepares high-quality coarse aggregate and comprises the steps:
(1) probing core and construction waste carry out the test of gathering materials of chemical analysis, radioanalysis and alkali;
(2) determine the operability of a certain zone construction waste in tunnel according to rock type, parent rock intensity, chemical ingredients and basic active experimental result;
(3) the construction waste adopts the two-stage jaw crusher to be crushed to the coarse aggregate of regulation particle diameter;
(4) coarse aggregate screening, washing;
(5) coarse aggregate check.
Preferably, carry out airing before the fragmentation of construction waste with preferred.
The present invention is based on test-results and lithologic analysis the constructing tunnel waste is carried out preferably, adopt the secondary jaw crusher that the construction waste is carried out fragmentation to reach corresponding tap density and voidage, by sieving, washing with control particle diameter and harmful ion content.
In preparation high performance concrete process, compound by big volume mineral admixture, polycarboxylate water-reducer to reduce hydration heat of concrete and shrinking percentage, optimize the concrete hole structure, by coarse aggregate and husky preferred concrete strength and the anticorrosive iontophoretic injection ability of improving comprehensively.This product has distinguishing features such as green low-carbon, high anti-ion etching and height are early strong.
The high performance concrete that utilizes the technology of the present invention to produce can reach following technical indicator:
1, mechanical property: 3d ultimate compression strength 〉=21MPa, 28d ultimate compression strength 〉=58MPa;
2, initial chloride ion content :≤0.35kg/m in the concrete
3
3, alkali content in the concrete :≤3kg/m
3
4,28 days chloride diffusion coefficient: D
RCM≤ 4 * 10
-8Cm
2/ s;
5, frost resistance: F300;
6, impervious grade: greater than S12;
7, workability of concrete: the initial slump 〉=180mm, go into pump before 〉=160mm.
Embodiment
Embodiment 1
The weight content of each component of the present invention is: 250 parts of cement, 1000 parts of coarse aggregates, 700 parts of sands, 70 parts in flyash, 140 parts of breezes, 5.5 parts of admixtures, 150 parts in water.
Described cement adopts strength grade 52.5 silicate cements, its fineness≤360m
2/ kg, C
3A content≤8%, free calcium oxide≤1.5%, soluble chloride ion content≤0.02%, alkalinity≤0.6%.
Described coarse aggregate adopts the constructing tunnel waste, and the cobble-stone diameter after the fragmentation of construction waste is 5mm, and its tap density is greater than 1480kg/m
3, voidage is suitable≤and 45%, crush index≤12%, faller gill shape particle total content≤10% contains mud and clod amount≤1.5%, soluble chloride ion content≤0.01%, no potential basic active.
Described sand adopts the river sand of fineness modulus 2.4, its cement content is not more than 2%, accumulative total screen over-size of its control 4.75mm, 0.6mm and 0.15mm sieve be respectively 0-5%, 40%-70% and 〉=95%, mica and lightweight matter in aggregate≤1.0%, soluble chloride ion content≤0.01%, no potential basic active.
Described flyash adopts I level flyash, its fineness≤12%, and loss on ignition≤4%, water demand ratio≤95%, sulfur trioxide content≤3%, soluble chloride ion content≤0.02%, water soluble alkali content (is pressed Na
2O+0.658K
2O calculates)≤0.30%.
Described breeze adopts S95, and it should be the breeze that 100% blast furnace slag makes, and specific surface area should be controlled at 350
2/ kg, sulfur trioxide content≤3%, soluble chloride ion content≤0.02%, water soluble alkali content (is pressed Na
2O+0.658K
2O calculates)≤0.45%.
Described admixture is poly-hydroxy acid water reducer, and its water-reducing rate is not less than 30%, and its soluble chloride ion content≤0.2% has good consistency with cement and adulterant, and can adjust time of coagulation and air content according to the engineering construction needs.
Described water, chloride ion content≤200mg/L; Sulphate content is pressed SO
4 2-Meter≤0.22%.
The preparation method of above-mentioned high performance concrete comprises the steps:
(1) the construction waste prepares high-quality coarse aggregate;
(2) starting material are chosen;
(3) at normal temperatures and pressures, mix stirring 1min with cement, flyash, breeze, coarse aggregate, sand;
(4) add admixture and water, continue to stir 1min, promptly can be made into high performance concrete.
The construction waste prepares high-quality coarse aggregate and comprises the steps:
(1) probing core and construction waste carry out the test of gathering materials of chemical analysis, radioanalysis and alkali;
(2) determine the operability of a certain zone construction waste in tunnel according to rock type, parent rock intensity, chemical ingredients and basic active experimental result;
(3) carry out airing before the fragmentation of construction waste;
(4) the construction waste adopts the two-stage jaw crusher to be crushed to the coarse aggregate of regulation particle diameter;
(5) coarse aggregate screening, washing;
(6) coarse aggregate check.
High performance concrete, pumping cast, mould shakes to vibrate with vibrating head and combines form removal behind the concrete curing in the mold 12h, water seasoning.
Embodiment 2
The weight content of each component of the present invention is: 270 parts of cement, 1100 parts of coarse aggregates, 750 parts of sands, 100 parts in flyash, 100 parts of breezes, 5 parts of admixtures, 160 parts in water.
Described cement adopts strength grade 52.5 silicate cements, its fineness≤360m
2/ kg, C
3A content≤8%, free calcium oxide≤1.5%, soluble chloride ion content≤0.02%, alkalinity≤0.6%.
Described coarse aggregate adopts the constructing tunnel waste, and the cobble-stone diameter after the fragmentation of construction waste is 25mm, and its tap density is greater than 1480kg/m
3, voidage is suitable≤and 45%, crush index≤12%, faller gill shape particle total content≤10% contains mud and clod amount≤1.5%, soluble chloride ion content≤0.01%, no potential basic active.
Described sand adopts the river sand of fineness modulus 3.0, its cement content is not more than 2%, accumulative total screen over-size of its control 4.75mm, 0.6mm and 0.15mm sieve be respectively 0-5%, 40%-70% and 〉=95%, mica and lightweight matter in aggregate≤1.0%, soluble chloride ion content≤0.01%, no potential basic active.
Described flyash adopts I level flyash, its fineness≤12%, and loss on ignition≤4%, water demand ratio≤95%, sulfur trioxide content≤3%, soluble chloride ion content≤0.02%, water soluble alkali content (is pressed Na
2O+0.658K
2O calculates)≤0.30%.
Described breeze adopts the S105 breeze, and it should be the breeze that 100% blast furnace slag makes, and specific surface area should be controlled at 450m
2/ kg, sulfur trioxide content≤3%, soluble chloride ion content≤0.02%, water soluble alkali content (is pressed Na
2O+0.658K
2O calculates)≤0.45%.
Described admixture is poly-hydroxy acid water reducer, and its water-reducing rate is 40%, and its soluble chloride ion content≤0.2% has good consistency with cement and adulterant, and can adjust time of coagulation and air content according to the engineering construction needs.
Described water, chloride ion content≤200mg/L; Sulphate content is pressed SO
4 2-Meter≤0.22%.
The preparation method of above-mentioned high performance concrete comprises the steps:
(1) the construction waste prepares high-quality coarse aggregate;
(2) starting material are chosen;
(3) at normal temperatures and pressures, mix stirring 3min with cement, flyash, breeze, coarse aggregate, sand;
(4) add admixture and water, continue to stir 3min, promptly can be made into high performance concrete.
The construction waste prepares high-quality coarse aggregate and comprises the steps:
(1) probing core and construction waste carry out the test of gathering materials of chemical analysis, radioanalysis and alkali;
(2) determine the operability of a certain zone construction waste in tunnel according to rock type, parent rock intensity, chemical ingredients and basic active experimental result;
(3) carry out airing before the fragmentation of construction waste;
(4) the construction waste adopts the two-stage jaw crusher to be crushed to the coarse aggregate of regulation particle diameter;
(5) coarse aggregate screening, washing;
(6) coarse aggregate check.
High performance concrete, pumping cast, mould shakes to vibrate with vibrating head and combines form removal behind the concrete curing in the mold 24h, water seasoning.
Claims (10)
1. the concrete of a tunnel waste and big volume mineral admixture preparation, it is characterized in that the weight content of each component is: cement 250-270 part, coarse aggregate 1000-1100 part, sand 700-750 part, flyash 70-90 part, breeze 140-160 part, admixture 5-6 part, water 150-160 part.
2. tunnel according to claim 1 waste and the concrete that big volume mineral admixture prepares is characterized in that described cement adopts strength grade 52.5 silicate cements.
3. tunnel according to claim 1 waste and the concrete that big volume mineral admixture prepares is characterized in that described coarse aggregate adopts the constructing tunnel waste, and the cobble-stone diameter after the fragmentation of construction waste is 5-25mm.
4. tunnel according to claim 1 waste and the concrete that big volume mineral admixture prepares is characterized in that described sand adopts the river sand of fineness modulus 2.4-3.0, and its cement content is not more than 2%.
5. tunnel according to claim 1 waste and the concrete that big volume mineral admixture prepares is characterized in that described flyash adopts I level flyash.
6. tunnel according to claim 1 waste and the concrete that big volume mineral admixture prepares is characterized in that described breeze adopts S95 or S105 breeze.
7. tunnel according to claim 1 waste and the concrete that big volume mineral admixture prepares is characterized in that, described admixture is poly-hydroxy acid water reducer, and its water-reducing rate is not less than 30%.
8. one kind is used for the described concrete preparation method of the arbitrary claim of claim 1-7, it is characterized in that, comprises the steps:
(1) the construction waste prepares high-quality coarse aggregate;
(2) starting material are chosen;
(3) at normal temperatures and pressures, mix stirring 1-3min with cement, flyash, breeze, coarse aggregate, sand;
(4) add admixture and water, continue to stir 1-3min, promptly can be made into high performance concrete.
9. preparation method according to claim 8 is characterized in that, the construction waste prepares high-quality coarse aggregate and comprises the steps:
(1) probing core and construction waste carry out the test of gathering materials of chemical analysis, radioanalysis and alkali;
(2) determine the operability of a certain zone construction waste in tunnel according to rock type, parent rock intensity, chemical ingredients and basic active experimental result;
(3) the construction waste adopts the two-stage jaw crusher to be crushed to the coarse aggregate of regulation particle diameter;
(4) coarse aggregate screening, washing;
(5) coarse aggregate check.
10. preparation method according to claim 9 is characterized in that, carries out airing with preferred before the fragmentation of construction waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100318877A CN102173684A (en) | 2011-01-28 | 2011-01-28 | Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100318877A CN102173684A (en) | 2011-01-28 | 2011-01-28 | Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof |
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|---|---|
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Family
ID=44516982
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|---|---|---|---|
| CN2011100318877A Pending CN102173684A (en) | 2011-01-28 | 2011-01-28 | Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898086A (en) * | 2012-10-31 | 2013-01-30 | 山东大元实业股份有限公司 | Preparation method of high-performance recycled aggregate concrete |
| CN102898089A (en) * | 2012-11-16 | 2013-01-30 | 上海市建筑构件制品有限公司 | Oil-proof concrete |
| CN103113062A (en) * | 2013-02-01 | 2013-05-22 | 同济大学 | Metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate and preparation method thereof |
| CN103524091A (en) * | 2012-07-06 | 2014-01-22 | 北京建筑技术发展有限责任公司 | Preparation method of large-mixing-amount fly ash non-autoclaved ultra-light foamed concrete |
| CN103803877A (en) * | 2013-12-27 | 2014-05-21 | 苏州市兴邦化学建材有限公司 | Humidity sensing concrete and preparation method thereof |
| CN106468104A (en) * | 2016-09-07 | 2017-03-01 | 西安建筑科技大学 | A kind of steel fiber reinforced concrete and its construction method reinforcing precast floor slab |
| CN109456006A (en) * | 2018-12-20 | 2019-03-12 | 中南大学 | A kind of self-compacting concrete and its application using waste preparation |
| CN110526648A (en) * | 2019-09-17 | 2019-12-03 | 中铁环境科技工程有限公司 | A kind of tunnel sludge renewable resources utilize method |
| CN111965325A (en) * | 2020-06-29 | 2020-11-20 | 中铁第一勘察设计院集团有限公司 | Method for judging utilization of tunnel waste slag as building material aggregate |
| CN112521094A (en) * | 2020-12-11 | 2021-03-19 | 青岛理工大学 | C35 steam-free curing concrete for fabricated building and preparation method thereof |
| CN113800860A (en) * | 2021-11-01 | 2021-12-17 | 山西省水利建筑工程局有限公司 | Application of TBM (Tunnel boring machine) hole digging slag in concrete, concrete and preparation of concrete |
| CN116462471A (en) * | 2023-06-07 | 2023-07-21 | 成都理工大学 | Concrete prepared from tunnel waste slag and preparation method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103524091B (en) * | 2012-07-06 | 2015-12-16 | 北京建筑技术发展有限责任公司 | The non-evaporating preparation method supporting ultralight foamed concrete of flyash in great mixed amount |
| CN103524091A (en) * | 2012-07-06 | 2014-01-22 | 北京建筑技术发展有限责任公司 | Preparation method of large-mixing-amount fly ash non-autoclaved ultra-light foamed concrete |
| CN102898086A (en) * | 2012-10-31 | 2013-01-30 | 山东大元实业股份有限公司 | Preparation method of high-performance recycled aggregate concrete |
| CN102898089A (en) * | 2012-11-16 | 2013-01-30 | 上海市建筑构件制品有限公司 | Oil-proof concrete |
| CN103113062A (en) * | 2013-02-01 | 2013-05-22 | 同济大学 | Metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate and preparation method thereof |
| CN103113062B (en) * | 2013-02-01 | 2014-08-13 | 同济大学 | Metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate and preparation method thereof |
| CN103803877A (en) * | 2013-12-27 | 2014-05-21 | 苏州市兴邦化学建材有限公司 | Humidity sensing concrete and preparation method thereof |
| CN106468104A (en) * | 2016-09-07 | 2017-03-01 | 西安建筑科技大学 | A kind of steel fiber reinforced concrete and its construction method reinforcing precast floor slab |
| CN109456006A (en) * | 2018-12-20 | 2019-03-12 | 中南大学 | A kind of self-compacting concrete and its application using waste preparation |
| CN110526648A (en) * | 2019-09-17 | 2019-12-03 | 中铁环境科技工程有限公司 | A kind of tunnel sludge renewable resources utilize method |
| CN110526648B (en) * | 2019-09-17 | 2022-01-14 | 中铁环境科技工程有限公司 | Tunnel sludge recycling method |
| CN111965325A (en) * | 2020-06-29 | 2020-11-20 | 中铁第一勘察设计院集团有限公司 | Method for judging utilization of tunnel waste slag as building material aggregate |
| CN112521094A (en) * | 2020-12-11 | 2021-03-19 | 青岛理工大学 | C35 steam-free curing concrete for fabricated building and preparation method thereof |
| CN113800860A (en) * | 2021-11-01 | 2021-12-17 | 山西省水利建筑工程局有限公司 | Application of TBM (Tunnel boring machine) hole digging slag in concrete, concrete and preparation of concrete |
| CN116462471A (en) * | 2023-06-07 | 2023-07-21 | 成都理工大学 | Concrete prepared from tunnel waste slag and preparation method thereof |
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Application publication date: 20110907 |