CN103771786A - Rapidly hardening mixture for road base and using method thereof - Google Patents

Rapidly hardening mixture for road base and using method thereof Download PDF

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Publication number
CN103771786A
CN103771786A CN201410032816.2A CN201410032816A CN103771786A CN 103771786 A CN103771786 A CN 103771786A CN 201410032816 A CN201410032816 A CN 201410032816A CN 103771786 A CN103771786 A CN 103771786A
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road
paper mill
flyash
calcium sulfite
fast rigid
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CN103771786B (en
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相雪松
郑德康
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SHANGHAI YALE MUNICIPAL INDUSTRIAL Co Ltd
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SHANGHAI YALE MUNICIPAL INDUSTRIAL Co Ltd
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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

Abstract

The invention discloses a rapidly hardening mixture for a road base and a using method thereof. The mixture is prepared by stirring and mixing a cementing material, gravel aggregate and water, wherein the cementing material comprises the following substances by weight percent: 30-50% of cement, 20-45% of slag powder, 15-30% of calcium sulfite coal ash, and 5-10% of paper mill sludge. The using method comprises the following steps of preparing the cementing material according to fixed proportion, stirring and mixing the cementing material with the gravel aggregate and water according to the use amount of 150-220kg/m<3> of the cementing material, and transporting to a construction site; paving and rolling the mixture, maintaining for three days, then paving a bituminous concrete surface layer, and after finishing paving the surface layer, putting the road into use. The rapidly hardening mixture for the road base has advantages of high strength at early stage, low deflection value of the base layer and less cracks on surface layer, the road can be put into use rapidly, the time occupying the road in road construction is shortened, and the rapidly hardening mixture has social benefits in comprehensive utilization of solid waste and reduction of environment pollution.

Description

A kind of fast rigid roadbase compound and using method thereof
Technical field
The invention belongs to road engineering material, specifically a kind of fast rigid roadbase compound and using method thereof.
Background technology
In urban road construction, conventionally adopt two grey stabilization gravels (or claiming three-dregs mixing material) as base material, its shortcoming is that early strength is low, preserving period reaches more than 28 days, causes road construction to account for the road time long, has a strong impact on to unimpeded the bringing of urban transportation.
On the other hand, coal-burning power plant of China progressively implements flue gas desulfurization at present.Due to the difference of sulfur removal technology, produce different desulfurizing byproducts.The desulfurated plaster that adopts lime/gypsum method to produce, main component is CaSO 42H 2o, can substitute the plaster of paris completely, and for the production of plasterboard and cement, comprehensive utilization ratio is higher; And the calcium sulfite flyash that adopts milk of lime/calcium sulfite method to produce, main component is CaSO 30.5H 2o, CaCO 3, Ca (OH) 2and flyash, complicated component, comprehensive utilization difficulty is large.Meanwhile, the paper mill sludge of the spent pulp liquors that discharge in papermaking enterprise mud workshop at present after conditioning, mechanism filter-pressing, water ratio is 75%-85%, main disposal options is sanitary landfill, waste land resources.
The fast rigid base mixture the present invention relates to is the new road base material of a kind of replacement two grey stabilization gravels, it adopts cement, slag powders, calcium sulfite flyash is as gelling material, and admixture paper mill sludge is as anti-fissuring agent, there is time of coagulation suitable, early strength is high, preserving period, only needs 3 days, basic unit's deflection value is low, the advantage that top-crack is few, can be widely used in urban road reorganization and expansion, the engineerings such as medium-capital overhauling Ji Jue road reparation, greatly alleviate the traffic pressure bringing due to road construction, there is the social benefit of practical engineering application value and comprehensive utilization of resources.
Summary of the invention
The object of this invention is to provide a kind of fast rigid roadbase compound and using method thereof, mainly formed the road basement material of repairing as urban road reorganization and expansion, medium-capital overhauling Ji Jue road by cement, slag powders, calcium sulfite flyash, paper mill sludge and sandstone aggregate manufacture.
Mechanism of the present invention is mainly the CaSO utilizing in calcium sulfite flyash 30.5H 2o and Ca (OH) 2, the activity of activated slag powder, produces ettringite hydrated product, improves early strength; Utilize a large amount of fibers in paper mill sludge simultaneously, improve the splitting resistance of fast rigid roadbase compound.
Fast rigid roadbase compound of the present invention, is uniformly mixed and is made by gelling material, sandstone aggregate and water, and described gelling material is made up of the material of following weight percent:
Cement: 30-50%;
Slag powders: 20-45%;
Calcium sulfite flyash: 15-30%;
Paper mill sludge: 5-10%;
The weight percent of described paper mill sludge is to be scaled after butt.
Preferably, described gelling material is made up of the material of following weight percent:
Cement: 35-40%;
Slag powders: 30-40%;
Calcium sulfite flyash: 15-25%;
Paper mill sludge: 5-8%.
Described calcium sulfite flyash is the by product of coal-burning power plant's generation while adopting milk of lime/calcium sulfite method to carry out flue gas desulfurization, and main component is CaSO 30.5H 2o, CaCO 3, Ca (OH) 2and flyash.
Described paper mill sludge is the papermaking enterprise mud workshop spent pulp liquors of discharging through conditioning, dewatered sludge after mechanism filter-pressing, and water ratio is 75wt%-85wt%.
The using method of above-mentioned fast rigid roadbase compound, comprises the following steps:
A) joining according to the above ratio gelatinous material, is 150-220kg/m by the consumption of gelatinous material 3it is mixed, stirred with sandstone aggregate and water, be transported to building site;
B) compound is paved, rolled, maintenance 3d gets final product making asphalt concrete pavement, after surface layer completes, gets final product open to traffic.
Preferably, in every cubic metre of compound, the consumption of gelatinous material is 180-200kg/m 3.
The present invention adopts the fast rigid roadbase compound of technique scheme to carry out urban road construction, and 3 days intensity of base mixture exceedes 10.0MPa, and maintenance gets final product making asphalt concrete pavement and open to traffic in 3 days, greatly shortens the road construction Zhan road time.
Specific implementation method
Referring to embodiment, the present invention is further illustrated.But will be understood that, embodiment is only illustrative, and should not provide constraints to protection scope of the present invention.
The chemical analysis results of the calcium sulfite flyash that the present invention uses is listed in table 1.
Table 1
SiO 2 Al 2O 3 CaO Fe 2O 3 MgO SO 3 Loss on ignition
9.13 6.21 34.12 1.15 8.19 21.33 12.14
Embodiment 1
Get P.O42.5 cement (taking from Jue Rong cement mill, Shanghai), S95 slag powders (taking from Hypon field building material company), calcium sulfite flyash (taking from Shanghai Shen Neng spark power & light company), paper mill sludge (taking from paper mill, Qidong, Jiangsu), crushed stone aggregate (taking from Shanghai urban construction Materials Company), above gelling material is prepared burden in the ratio of table 2.Wherein, paper mill sludge is the ratio that is converted into butt.
Press GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard ", GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", carry out the performance test of fast rigid roadbase compound.The consumption of getting gelling material is 180kg/m 3, sand consumption is 721kg/m 3, rubble consumption is 1340kg/m 3, water consumption 130kg/m 3, by above starting material be uniformly mixed, specimen molding and maintenance, test-results is in table 2.
Table 2
Figure BDA0000461077830000041
By table 2:
(1) adopt cement, slag powders, calcium sulfite flyash and the paper mill sludge fast rigid roadbase compound as gelling material preparation, mixture better performances (tieing up vigorous denseness 5s-9s), early strength is high, more than 3d ultimate compression strength reaches 10.0MPa, exceed two grey stabilization gravel 28d ultimate compression strength (5.0MPa).
(2) contrast A3 and A5, A4 and A6 are known, keep the consumption of calcium sulfite flyash constant, reduce cement consumption, increase slag powders consumption, and the 3d intensity of fast rigid roadbase compound increases.CaSO in calcium sulfite flyash is described 30.5H 2o, Ca (OH) 2slag powders is had to excitation, can improve early strength.
(3), when cement in gelling material is that 40 parts, slag powders are that 40 parts, calcium sulfite flyash are 15 parts, when 5 parts of paper mill sludges, the 3d intensity of fast rigid roadbase compound is the highest.
Embodiment 2
Test by starting material and test method with embodiment 1, get A3 group in table 1 gelling material proportioning (be cement 40%, slag powders 40%, calcium sulfite flyash 15%, paper mill sludge 5%), change gel material content, keeping the vigorous denseness of dimension of mixture is 5s-10s, suitably adjusts water consumption.Test-results is in table 3.
Table 3
Figure BDA0000461077830000051
By table 3:
(1) when gel material content is from 150kg/m 3rise to 220kg/m 3time, the 3d intensity of fast rigid roadbase compound progressively increases.Wherein B1(gel material content is 150kg/m 3) 3d intensity also can reach 10.0MPa more than, meet early strong requirement.
(2) when gel material content is from 150kg/m 3rise to 180kg/m 3time, 3d gain in strength is larger; And when gel material content is from 200kg/m 3rise to 220kg/m 3time, 3d gain in strength is not obvious.Therefore the preferable amount of gelling material is 180-200kg/m 3.
Embodiment 3
Test with starting material with embodiment 1, press GB/T50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete standard ", fast rigid roadbase compound is carried out to early stage cracking test, and (JGJ/T193-2009), splitting resistance is graded according to " concrete durability check evaluation criterion ".Test and evaluation result are in table 4.
When test, the consumption of getting gelling material is 180kg/m 3, sand consumption is 721kg/m 3, rubble consumption is 1340kg/m 3, keeping the vigorous denseness of dimension of mixture is 5s-10s, suitably adjusts water consumption.
Table 4
Figure BDA0000461077830000061
By table 4:
(1) adopt the paper mill sludge of 5%-10% to replace calcium sulfite flyash, the splitting resistance of fast rigid roadbase compound progressively improves (being increased to L-IV level from L-I level).In the time that the consumption of paper mill sludge reaches 10%, area of cracks minimum in unit surface.
(2) water requirement of paper mill sludge is large, for keeping the vigorous denseness of dimension of compound consistent, needs to improve the water consumption of mixture, causes 3d intensity to decrease.Therefore the preferable amount of paper mill sludge is 5%-8%.
Embodiment 5
The present embodiment is the practical engineering application case of fast rigid roadbase compound.
Engineering name: Road, Yunnan, Shanghai City (Yan'an Road～Guang Donglu) road, water drain reconstruction project
Engineering Notice: subbase is thickness 15cm gravel sand, basic unit is the fast rigid roadbase compound of thickness 25cm.
Construction temperature :-2 ℃-7 ℃
Usage quantity: this project is used fast rigid roadbase compound 36.0m altogether 3, a point secondary rolls, and the quantity at every turn rolling is respectively 7.0m 3, 29.0m 3.
Products production: fast rigid roadbase compound is produced by Shanghai Jian Gong Materials Co., Ltd, is transported to building site with wagon tremie, and haulage time is about 1 hour.Producting proportion is the A3 group of table 2.
Roadbase construction: fast rigid roadbase compound is transported to behind building site, coordinates and carries out Manual with forklift immediately, accomplishes once smooth.While rolling, first press roads to press twice with 6 tons of two-wheels, wheelmark is overlapping is 30cm, then carries out compacting with 12 tons of three-roll road rollers, wheelmark is overlapping be trailing wheel wide 1/2.Finally cover steel plate and carry out maintenance.
Engineering detecting result: after base layer construction the 5th day, fast rigid roadbase compound is carried out to coring test, core intensity is 14.8MPa, substantially identical with laboratory test results.Base layer construction finishes latter 3 days, has carried out deflection test, and deflection value is 0.254mm, and (<0.70mm) meets design requirement.
Implementation result: after base layer construction 3 days, the Beihai Road crossing, Road, Yunnan of this project, recover road traffic, greatly alleviate social traffic pressure.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment.Do not depart from the equivalence completing under principles of this disclosure so every or revise, all falling into the scope of protection of the invention.

Claims (6)

1. a fast rigid roadbase compound, is uniformly mixed and is made by gelling material, sandstone aggregate and water, it is characterized in that, described gelling material is made up of the material of following weight percent:
Cement: 30-50%;
Slag powders: 20-45%;
Calcium sulfite flyash: 15-30%;
Paper mill sludge: 5-10%;
The weight percent of described paper mill sludge is to be scaled after butt.
2. fast rigid roadbase compound according to claim 1, is characterized in that, described gelling material is made up of the material of following weight percent:
Cement: 35-40%;
Slag powders: 30-40%;
Calcium sulfite flyash: 15-25%;
Paper mill sludge: 5-8%.
3. fast rigid roadbase compound according to claim 1 and 2, is characterized in that, described calcium sulfite flyash is the by product of coal-burning power plant's generation while adopting milk of lime/calcium sulfite method to carry out flue gas desulfurization, and main component is CaSO 30.5H 2o, CaCO 3, Ca (OH) 2and flyash.
4. fast rigid roadbase compound according to claim 1 and 2, is characterized in that, described paper mill sludge is the papermaking enterprise mud workshop spent pulp liquors of discharging through conditioning, dewatered sludge after mechanism filter-pressing, and water ratio is 75wt%-85wt%.
5. the using method of fast rigid roadbase compound according to claim 1 and 2, is characterized in that, comprises the following steps:
A) joining gelatinous material in the ratio in claim 1 or 2, is 150-220kg/m by the consumption of gelatinous material 3it is mixed, stirred with sandstone aggregate and water, be transported to building site;
B) compound is paved, rolled, maintenance 3d gets final product making asphalt concrete pavement, after surface layer completes, gets final product open to traffic.
6. the using method of fast rigid roadbase compound according to claim 5, is characterized in that, in every cubic metre of compound, the consumption of gelatinous material is 180-200kg/m 3.
CN201410032816.2A 2014-01-23 2014-01-23 A kind of fast rigid roadbase compound and using method thereof Expired - Fee Related CN103771786B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108004868A (en) * 2017-10-19 2018-05-08 四川欧迅能源工程科技有限公司 A kind of quitter is laid with steady layer of water or the method for supercrust
CN113152193A (en) * 2021-04-25 2021-07-23 中冶南方城市建设工程技术有限公司 Novel permeable concrete preparation method

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Publication number Priority date Publication date Assignee Title
CN1480264A (en) * 2003-07-08 2004-03-10 健 王 Method for treating inorganic solid waste and application
CN101108770A (en) * 2006-07-20 2008-01-23 上海同基材料科学研究所 Soil-stone consolidation agent
CN102584062A (en) * 2012-03-15 2012-07-18 宝山钢铁股份有限公司 Mineral powder modified by sintering dry desulphurization ash and preparation method thereof
CN102703086A (en) * 2012-05-21 2012-10-03 沈阳大学 Inorganic soil curing agent and preparation method thereof
CN103011706A (en) * 2012-12-14 2013-04-03 海南蓝岛环保产业股份有限公司 Concrete taking green mud and white mud as admixtures and preparation method for concrete
CN103373827A (en) * 2012-04-17 2013-10-30 都江堰科普达新型材料有限公司 Cement-based material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1480264A (en) * 2003-07-08 2004-03-10 健 王 Method for treating inorganic solid waste and application
CN101108770A (en) * 2006-07-20 2008-01-23 上海同基材料科学研究所 Soil-stone consolidation agent
CN102584062A (en) * 2012-03-15 2012-07-18 宝山钢铁股份有限公司 Mineral powder modified by sintering dry desulphurization ash and preparation method thereof
CN103373827A (en) * 2012-04-17 2013-10-30 都江堰科普达新型材料有限公司 Cement-based material
CN102703086A (en) * 2012-05-21 2012-10-03 沈阳大学 Inorganic soil curing agent and preparation method thereof
CN103011706A (en) * 2012-12-14 2013-04-03 海南蓝岛环保产业股份有限公司 Concrete taking green mud and white mud as admixtures and preparation method for concrete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108004868A (en) * 2017-10-19 2018-05-08 四川欧迅能源工程科技有限公司 A kind of quitter is laid with steady layer of water or the method for supercrust
CN113152193A (en) * 2021-04-25 2021-07-23 中冶南方城市建设工程技术有限公司 Novel permeable concrete preparation method

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