CN104193258A - High-strength elastic concrete for heavy-haul railway sleepers - Google Patents
High-strength elastic concrete for heavy-haul railway sleepers Download PDFInfo
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- CN104193258A CN104193258A CN201410397789.9A CN201410397789A CN104193258A CN 104193258 A CN104193258 A CN 104193258A CN 201410397789 A CN201410397789 A CN 201410397789A CN 104193258 A CN104193258 A CN 104193258A
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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 invention discloses a high-strength elastic concrete for heavy-haul railway sleepers, which is prepared by mixing and stirring cement, rubber powder and accessories with water. The high-strength elastic concrete for heavy-haul railway sleepers comprises the following components in parts by weight: 100 parts of cement, 3-8 parts of rubber powder, 20-50 parts of pulverized coal ash, 5-20 parts of silica fume, 200-300 parts of fine aggregates, 250-300 parts of coarse aggregates, 5-15 parts of an expanding agent, 1.0-2.0 parts of a water reducing agent, 0.001 part of a defoaming agent, and 40-60 parts of water. The concrete has the advantages of high strength, high anticracking, high impact resistance, high durability and the like, the 3d strength is more than or equal to 95MPa after the concrete is subjected to steam curing at 45DEG C, and the impact resistance times is more than or equal to 3000 (ACI-544 method). The high-strength elastic concrete can be used for heavy-haul railway sleepers and other concrete structures which are subjected to certain serious impact.
Description
Technical field
The present invention relates to a kind of high-strength elastic concrete for heavy haul railway sleeper, can be used for the manufacture of heavy haul railway prestressed reinforced concrete tie, also can be used for some other concrete structure that is subject to serious impact.
Background technology
Heavy haul railway refers generally to the weight of train and at least reaches 5000t, the heavy 21t of axle and more than, single line annual traffic 2000 ten thousand t and more than.According to the new standard of international heavily loaded association Brazil in 2005 annual meeting, heavy haul railway refers to that the weight of train at least reaches 8000t, axle heavy (plan axle weight) 27t and more than, on l50km track section at least, single line annual traffic surpasses 4,000 ten thousand t.Heavy haul railway transportation is because its capacity is large, efficiency is high, the low extensive attention that is subject to countries in the world railway of transportation cost, particularly the bulk supply tariff freight volume such as, aboundresources vast in territory at some, coal and ore is occupied the country of larger specific gravity, as the U.S., Canada, Brazil, Australia, South Africa etc., develop particularly rapid.At present, heavy haul railway transportation worldwide develops rapidly, and heavy haul transport, by the internationally recognized direction for railway freight development, becomes the important trend of world's railway development.
China's article one heavy haul railway is expanding on Dalian-Qinhuangdao Railway coal flowing channel, and Datong-Qinhuangdao Railway is from station, Han Jia ridge, Datong area, to the east of southern station, Liu village, Qinhuangdao, and total length 653km, in December, 1992 is comprehensively open-minded.As the most important Coal Transport passage of China, expanding on Dalian-Qinhuangdao Railway is being born the coal freight volume of china railway nearly 1/5, for the whole nation six large electrical networks, thousands of enterprises and broad masses of the people provide production, coal consumption of living.From 2003 to 2008, the sustainable growth of expanding on Dalian-Qinhuangdao Railway annual traffic, 2007-2009 reaches more than 300,000,000 tons.The Qun Dynasty's heavy haul transport technology of take is support, northern same white villi grown on the female flower fringe of cattail, Yungang Grottoes branch line, moves Cao's line and has started 10,000 tons and 20,000 tons of heavy-load combined trains, and large envelope curve, mouthful spring branch line, large directrix have been started 10,000 tons of heavy haul trains.
Compare with common railway, the features such as the high train operation density of heavy haul railway, HI high impact load, cause track component hurt greatly to accelerate, the even thoroughly damage of i.e. appearance in a week having.For heavy haul railway sleeper used, its main damage form has: wearing and tearing and the cutting of resilient sleeper-bearing on concrete sleeper track under (1) rail; (2) there is excessive transverse crack in rail lower section; (3) rail lower section conquassation; (4) there is excessive transverse crack in sleeper middle portion; (5) sleeper middle portion conquassation; (6) be full of cracks of sleeper longitudinal slit sleeper; (7) sleeper middle portion oblique segmentation and spraining; (8) sleeper shoulder block is damaged; (9) corrosion of sleeper; (10) piece is fallen on sleeper base.In addition, greatly strengthen, thereby make maintenance of way remedial operation frequent because heavy haul train makes ballast aggregate extruding with the degree of wear, wherein tamping operation equally easily makes sleeper be subject to destroying compared with large surging force.
Heavy haul railway is the important development direction that is Future in China freight rail, is also one of China railways technology content of walking out.The sleeper concrete material of exploitation high impact-resistant, high-durability, for the manufacture of high performance heavily loaded sleeper, is of great significance for China's heavy haul railway construction and existing Heavy-Haul Railwayization transformation tool.
Summary of the invention
Above deficiency in view of prior art, the object of the invention is to propose a kind of high-strength elastic concrete for heavy haul railway sleeper, make it to overcome the above deficiency of prior art, there is high strength, high cracking resistance, shock resistance, absorbing, high durable, for heavy haul railway prestressed reinforced concrete tie, also can be used for some other concrete structure that is subject to serious impact.
Object of the present invention realizes by following means.
1. the high-strength elastic concrete for heavy haul railway sleeper, by concrete, by cement, rubber powder and auxiliary material and water mix and blend, made, for heavy haul railway sleeper, and have and can bear: steam-cured 3d intensity >=95MPa at 45 ℃, shock resistance number of times >=3000 time (ACI-544 method), the strength property of freeze proof number of times >=500 time; The shared weight part of each component is:
Cement: 100 parts, rubber powder: 3～8 parts, flyash: 20～50 parts, silicon ash: 5～20 parts; Fine aggregate: 200～300 parts, coarse aggregate: 250～300 parts, swelling agent: 5～15 parts, water reducer: 1.0～2.0 parts, defoamer: 0.001 part, water: 40～60 parts.
The present invention mixes a certain amount of I level flyash, flyash main component is cold vitrifying microballon of high temperature wink, there is roller bearing, lubrication, can effectively reduce the reinforcement of concrete water yield, and then reduce concrete dry shrinkage, its volcanic ash effect, closely knit filling effect can reduce concrete filtration coefficient simultaneously, effectively improve interfacial transition zone, improve concrete volume stability and splitting resistance, suppress alkali-aggregate reaction and steel bar corrosion, improve concrete weather resistance.
The present invention mixes a certain amount of silicon ash, utilize the advantage such as bigger serface, high reaction activity of silicon ash, can effectively improve concrete early strength, accelerate on-the-spot mould turnaround speed and speed of application, utilize its tiny, fine and close advantage simultaneously, effectively improve concrete final strength and weather resistance.
The present invention's grain composition thick by optimizing, fine aggregate, by controlling particle diameter in aggregate, be 10～20mm stone content especially, improve concrete self-compacting and reinforcing bar through performance, make to reach between particle maximum dense packing simultaneously, improve concrete volume stability, reduced concrete shrinkage cracking.
In the present invention by rubber particle surface is processed with PVA and silane coupling agent, significantly improved the ultimate compression strength of rubber concrete, when concrete elastic is increased, ultimate compression strength does not obviously reduce, and the rubber grain being distributed in concrete has served as energy-absorbing unit one by one, effectively improved the fragility problem of high-strength concrete, make its impact resistance, energy absorption capability etc. high more than normal concrete, the limit is drawn, compressive strain is also better than normal concrete, and makes concrete have certain suction, damping capacity.
The present invention adopts expansible agent technology, in this swelling agent, mix the aluminium powder of certain fineness, by reasonable control aluminium powder fineness and content, can effectively reduce concrete early-age shrinkage cracking, improve the full degree of concrete in die cavity, and reach compensate for shrinkage object.
The present invention adopts polycarboxylate water-reducer technology, by reducing largely concrete mixing water amount, reduces concrete porosity and dry shrinkage, to reach high-strength object.
The present invention adopts silicone antifoam agent technology, and this defoamer can still have higher froth breaking ability under strong basicity environment, can effectively reduce the blister of newly mixing self-compacting concrete surface, and can self-compacting concrete stir, the content of the bubble of introducing in pumping procedure.
Embodiment
Below enforcement of the present invention is further described.But should be emphasized that embodiment is below exemplary, rather than in order to limit the scope of the invention and to apply.In processing step, related chemical feedstocks and reagent are conventional commercially available technical pure, and remaining is the auxiliary building materials of commercially available routine.
Raw materials used in the invention process process have a following requirement: cement is low alkali portland cement, and its 28d intensity should be greater than 42.5MPa, and its alkali content should be less than 0.6%, and chloride ion content should be less than 0.06%; Flyash is the thin ash that power plant collects from flue gas, and its quality should reach the level of I level flyash; Gui Huiwei ferroalloy works are in smelting duriron and industrial silicon process, by a large amount of volatility SiO that produce in electrothermal stove
2with the product of Si gas after oxidation, condensation, precipitation, answer>=20000m of its surface-area
2/ kg, activity index answers>=105%; Fine aggregate can be river sand or Machine-made Sand, and its fineness modulus is 2.5～4.0.Coarse aggregate is the particle diameter limestone that is not more than 20mm, basalt etc., and wherein 10～20mm part must not be less than 25%.Rubber powder is the waste tyre particle after shredding, and rubber particle surface is processed with PVA and silane coupling agent in advance, and fineness is 30～50 orders.Swelling agent composition is calcium sulphoaluminate expansion agent series, also can be commercially available calcium oxide, magnesium oxide expansion agent series, wherein mixes 0.0001～0.0004 weight part flakey aluminium powder, and aluminium powder fineness is not less than 150 orders.Water reducer composition is polycarboxylate water-reducer, its water-reducing rate >=25%, and solid content >=25%, shrinkage ratio answers≤110%.Defoamer is silicone based defoamer, and its main component is polyether siloxane copolymers.
Below in conjunction with embodiment, further set forth content of the present invention, but content of the present invention is not limited only to following examples.
Embodiment 1:
The high-strength elastic concrete of the heavy haul railway sleeper of the present embodiment is comprised of cement, rubber powder, flyash, silicon ash, fine aggregate, coarse aggregate, swelling agent, water reducer, defoamer, water etc.The weight part of each component is:
Fresh mixing concrete property index is: slump 85mm, apparent density 2410kg/m
3, without segregation, without bleeding; Properties of hardened concrete index is: concrete is steam-cured 3d ultimate compression strength 95.8MPa at 45 ℃, 28d ultimate compression strength 97.8MPa, 28d folding strength is answered 10.2MPa, ACI 544 shock resistance number of times 5100 times (ACI-544 method), 56d concrete charge pass 150C, 56d concrete antifreezing number of times (quick-freeze method)>=F500.
Embodiment 2:
The high-strength elastic concrete of the heavy haul railway sleeper of the present embodiment is comprised of cement, rubber powder, flyash, silicon ash, fine aggregate, coarse aggregate, swelling agent, water reducer, defoamer, water etc.The weight part of each component is:
Fresh mixing concrete property index is: slump 90mm, apparent density 2420kg/m
3, without segregation, without bleeding; Properties of hardened concrete index is: concrete is steam-cured 3d ultimate compression strength 95.8MPa at 45 ℃, 28d ultimate compression strength 98.2MPa, 28d folding strength is answered 10.4MPa, ACI 544 shock resistance number of times 5500 times (ACI-544 method), 56d concrete charge pass 180C, 56d concrete antifreezing number of times (quick-freeze method)>=F500.
Claims (10)
1. the high-strength elastic concrete for heavy haul railway sleeper, by concrete, by cement, rubber powder and auxiliary material and water mix and blend, made, for heavy haul railway sleeper, and have and can bear: steam-cured 3d intensity >=95MPa at 45 ℃, shock resistance number of times >=3000 time, the strength property of freeze proof number of times >=500 time; The shared weight part of each component is:
Cement: 100 parts, rubber powder: 3～8 parts, flyash: 20～50 parts, silicon ash: 5～20 parts; Fine aggregate: 200～300 parts, coarse aggregate: 250～300 parts, swelling agent: 5～15 parts, water reducer: 1.0～2.0 parts, defoamer: 0.001 part, water: 40～60 parts.
2. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that described cement is low alkali portland cement, its 28d intensity should be greater than 42.5MPa, and its alkali content should be less than 0.6%, and chloride ion content should be less than 0.06%.
3. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described flyash is the thin ash that power plant collects from flue gas, and its quality should reach the level of I level flyash.
4. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described Gui Huiwei ferroalloy works are in smelting duriron and industrial silicon process, by a large amount of volatility SiO that produce in electrothermal stove
2with the product of Si gas after oxidation, condensation, precipitation, answer>=20000m of its surface-area
2/ kg, activity index answers>=105%.
5. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described fine aggregate can be river sand or Machine-made Sand, and its fineness modulus is 2.5～4.0.
6. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described coarse aggregate is the particle diameter limestone that is not more than 20mm, basalt etc., and wherein 10～20mm part must not be less than 25%.
7. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described rubber powder is the waste tyre particle after shredding, and rubber particle surface is processed with PVA and silane coupling agent in advance, and fineness is 30～50 orders.
8. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described swelling agent composition is calcium sulphoaluminate expansion agent series, also can be commercially available calcium oxide, magnesium oxide expansion agent series, wherein mix 0.0001～0.0004 weight part flakey aluminium powder, aluminium powder fineness is not less than 150 orders.
9. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described water reducer composition is polycarboxylate water-reducer, its water-reducing rate >=25%, and solid content >=25%, shrinkage ratio answers≤110%.
10. according to claim 1 for the high-strength elastic concrete of heavy haul railway sleeper, it is characterized in that, described defoamer is silicone based defoamer, and its main component is polyether siloxane copolymers.
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| CN201410397789.9A CN104193258A (en) | 2014-08-14 | 2014-08-14 | High-strength elastic concrete for heavy-haul railway sleepers |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106012790A (en) * | 2016-05-20 | 2016-10-12 | 中国路桥工程有限责任公司 | Manufacturing method for porous volcanic aggregate concrete T-shaped beam |
| CN106045386A (en) * | 2016-05-20 | 2016-10-26 | 中国路桥工程有限责任公司 | Porous-volcanics-aggregate concrete sleeper |
| CN106082769A (en) * | 2016-06-15 | 2016-11-09 | 汤海涛 | A kind of concrete anticracking extender |
| CN106082812A (en) * | 2016-06-15 | 2016-11-09 | 汤海涛 | A kind of anti-crack concrete |
| CN106082820A (en) * | 2016-06-15 | 2016-11-09 | 汤海涛 | A kind of preparation technology of anti-crack concrete |
| CN106120555A (en) * | 2016-08-22 | 2016-11-16 | 中铁第四勘察设计院集团有限公司 | A kind of track structure being applicable to high-speed railway bridge |
| CN106830759A (en) * | 2017-02-17 | 2017-06-13 | 武汉理工大学 | A kind of hydrophobic anti-freeze antiskid layer material and preparation method thereof |
| CN107407058A (en) * | 2015-02-11 | 2017-11-28 | 密执安州立大学董事会 | Durability railroad sleeper |
| CN108609953A (en) * | 2018-05-21 | 2018-10-02 | 西南交通大学 | A kind of anti-folding, abrasion-proof concrete for prestressing force assembled road surface |
| CN108951309A (en) * | 2018-08-17 | 2018-12-07 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of rubber grain concrete sleeper |
| CN109336485A (en) * | 2018-12-18 | 2019-02-15 | 中建西部建设(天津)有限公司 | A kind of high-strength corrosion-resistant erosion underplate concrete |
| CN110128072A (en) * | 2019-05-06 | 2019-08-16 | 莆田学院 | A kind of low-carbon lower shrinkage super high strength concrete, preparation method and applications |
| CN111320450A (en) * | 2020-04-02 | 2020-06-23 | 北京眷诚铁道工程技术有限公司 | Self-compacting material for repairing railway concrete sleeper and preparation method and application thereof |
| CN111499308A (en) * | 2020-05-13 | 2020-08-07 | 山东交通职业学院 | Novel rubber concrete damping sleeper |
| CN113526932A (en) * | 2021-09-07 | 2021-10-22 | 中铁十一局集团桥梁有限公司 | Concrete for sleeper |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107407058B (en) * | 2015-02-11 | 2020-12-25 | 密歇根大学董事会 | Durable railroad sleeper |
| CN107407058A (en) * | 2015-02-11 | 2017-11-28 | 密执安州立大学董事会 | Durability railroad sleeper |
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| CN106012790A (en) * | 2016-05-20 | 2016-10-12 | 中国路桥工程有限责任公司 | Manufacturing method for porous volcanic aggregate concrete T-shaped beam |
| CN106045386A (en) * | 2016-05-20 | 2016-10-26 | 中国路桥工程有限责任公司 | Porous-volcanics-aggregate concrete sleeper |
| CN106082769A (en) * | 2016-06-15 | 2016-11-09 | 汤海涛 | A kind of concrete anticracking extender |
| CN106082812A (en) * | 2016-06-15 | 2016-11-09 | 汤海涛 | A kind of anti-crack concrete |
| CN106082820A (en) * | 2016-06-15 | 2016-11-09 | 汤海涛 | A kind of preparation technology of anti-crack concrete |
| CN106120555A (en) * | 2016-08-22 | 2016-11-16 | 中铁第四勘察设计院集团有限公司 | A kind of track structure being applicable to high-speed railway bridge |
| CN106830759B (en) * | 2017-02-17 | 2019-11-26 | 武汉理工大学 | Hydrophobic anti-freeze antiskid layer material of one kind and preparation method thereof |
| CN106830759A (en) * | 2017-02-17 | 2017-06-13 | 武汉理工大学 | A kind of hydrophobic anti-freeze antiskid layer material and preparation method thereof |
| CN108609953A (en) * | 2018-05-21 | 2018-10-02 | 西南交通大学 | A kind of anti-folding, abrasion-proof concrete for prestressing force assembled road surface |
| CN108951309A (en) * | 2018-08-17 | 2018-12-07 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of rubber grain concrete sleeper |
| CN109336485A (en) * | 2018-12-18 | 2019-02-15 | 中建西部建设(天津)有限公司 | A kind of high-strength corrosion-resistant erosion underplate concrete |
| CN110128072A (en) * | 2019-05-06 | 2019-08-16 | 莆田学院 | A kind of low-carbon lower shrinkage super high strength concrete, preparation method and applications |
| CN111320450A (en) * | 2020-04-02 | 2020-06-23 | 北京眷诚铁道工程技术有限公司 | Self-compacting material for repairing railway concrete sleeper and preparation method and application thereof |
| CN111499308A (en) * | 2020-05-13 | 2020-08-07 | 山东交通职业学院 | Novel rubber concrete damping sleeper |
| CN113526932A (en) * | 2021-09-07 | 2021-10-22 | 中铁十一局集团桥梁有限公司 | Concrete for sleeper |
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Application publication date: 20141210 |