CN101549976A - Concrete mixing proportion for deposition tube tunneltron segment - Google Patents
Concrete mixing proportion for deposition tube tunneltron segment Download PDFInfo
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- CN101549976A CN101549976A CNA2009100649410A CN200910064941A CN101549976A CN 101549976 A CN101549976 A CN 101549976A CN A2009100649410 A CNA2009100649410 A CN A2009100649410A CN 200910064941 A CN200910064941 A CN 200910064941A CN 101549976 A CN101549976 A CN 101549976A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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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 cement concrete configuration technic, specifically, a concrete mixing proportion for deposition tube tunneltron segment which includes a pipeline section body concrete mixing proportion and pipeline section late poured band concrete mixing proportion. The pipeline section body concrete has weight percentage as follows: water 7.3%, cement 10.5%, fly ash 2.1-3.5%, mineral powder 3.5-4.9%, sand 29.9%, stone 43.52%, high efficiency water reducing agent 0.44%, fabric 0.03% and plumping agent 1.46-1.83%. The pipeline section mass concrete manufactured by the mixing proportion can satisfy design volume weight, strength gradation of the pipeline section concrete which has better anti-seepage and anti-crack property, and has favour economical efficiency.
Description
Technical field
The present invention relates to the cement concrete configuring technical, particularly a kind of deposition tube tunneltron segment concrete mix.
Background technology
Domestic immersed tube tunnel is started late, and the immersed tube tunnel that the continent has been open to traffic at present has only Yong Jiang tunnel, Ningbo, Guangzhou Pearl River tunnel, normal big vast tunnel, Ningbo, Hangzhou Wan seabed immersed tube tunnel and Shanghai Outer Ring Line cross-river tunnel.Immersed tube tunnel also just more and more is subject to people's attention as a kind of method for tunnel construction of wearing Jiang Yuehai.The immersed tube pipeline section is as the agent structure of immersed tube tunnel, and its quality quality is related to the success or failure in whole tunnel.Immersed tube tunnel pipeline section volume is very big, as the agent structure in tunnel, finally will bear various loads, and this just requires pipeline section to satisfy design strength with concrete; Pipeline section will satisfy the transportation by driving requirement, and this just requires pipeline section to satisfy design accuracy with concrete density; The concrete of the such large volume of cast in situs, but need good application property (workability, the mixture slump); Want submerged to use for many years after pipeline section is built and finished, this just requires pipeline section with concrete good resistance to cleavage, anti-permeability performance to be arranged.Therefore, select suitable concrete proportioning material, select for use rational concrete mix to make the pipeline section concrete of excellent property, significant.
But the concrete intensity of pipeline section, unit weight application property are concrete fundamental propertys, by adjusting the water-cement ratio (ratio of water and gelling material; Gelling material refers to cement, flyash, breeze etc.), cement mark, the aggregate collection is joined and means ratio such as incorporation, gelling material incorporation is easier to meet design requirement.And compare with conventional mass concrete, pipeline section is being had higher requirement aspect resistance to cleavage and the anti-permeability performance with concrete.Because heterogenize, the nonuniformity of concrete microstructure, certainly existing a large amount of minute cracks in the concrete, thereby our the concrete resistance to cleavage said is meant with the Crack Control in the concrete within the specific limits usually, avoids producing the deleterious crack of structure.It is that works produces fissured major cause in the present engineering practice that concrete distortion changes, why concrete distortion can cause the crack generation if changing, be since concrete under the factor effect of temperature, contraction, expansion, non-uniform settling, cause the generation of being out of shape, and then generation stress, when stress exceeded certain numerical value, the tensile strength equivalent-load ability of concrete self can't stop the generation of further distortion, will produce distress in concrete.The heat that concrete produces in its strength development process, the overwhelming majority produces owing to cement and water carry out the aquation reflection, and the hydration heat of generation is high more, is unfavorable for concrete resistance to cleavage more.
Concrete is as a kind of porous material, and porosity is very high, and wherein particularly pore accounts for greatly.Concrete perviousness at first depends on the porosity of hydrated cement paste, and the capillary pore rate of hydrated cement paste depends primarily on water-cement ratio, and water-cement ratio is big more, and porosity is big more, and the grout impermeability is poor more.
For preventing that the cast-in-situ steel reinforced concrete pipeline section is owing to temperature, the uneven issuable harmful crack of contraction, according to design or job specifications requirement, stay in the corresponding position and to establish interim construction joint, pipeline section temporarily is divided into several portions, shrink through component inside, after the some time, water again and smash this construction joint concrete, pipeline section is linked to be integral body, the position that construction joint is set is called as the pipeline section post-cast strip, and other positions of pipeline section are become the pipeline section main body.
The domestic concrete proportioning of having built the employing of immersed tube tunnel pipeline section is made up of water, cement, flyash, sand, stone and high efficiency water reducing agent before present patent application, and its pipeline section main body all adopts identical proportioning with the pipeline section post-cast strip, for example the employed pipeline section quality mixture ratio of Shanghai Outer Ring Line immersed tube tunnel is: water 7.83%, cement 12.53%, flyash 4.4%, sand 31.28%, stone 43.22%, high efficiency water reducing agent 0.74%.Water, cement, sand, stone are the concrete basic raw material of configuration in this proportioning, and its effect is told no longer in detail.Utilize the lateral reactivity of industrial residue flyash, reduce cement consumption, reduce the concrete production cost, turn waste into wealth and turn harm into good, save a large amount of valuable soil of stacking flyash, bring into play the high-performance advantage to a greater degree, improve workability of concrete, weather resistance and physical and mechanical property.High efficiency water reducing agent is regulated the concrete setting and harden time to improving the workability of mix, and aspects such as control strength development and raising weather resistance play significant effect.
Pipeline section before the present patent application is compared general mass concrete proportioning with concrete proportioning, but except that aspects such as intensity, proportion application property meet design requirement, also good aspect resistance to cleavage and anti-permeability performance than general mass concrete.But it also has the space of optimizing aspect water consumption (7.83%), cement consumption (12.53%), water-cement ratio (0.46).And the pipeline section concrete will use for many years under water, just must propose higher requirement in these areas.Simultaneously, the pipeline section post-cast strip is to water after the some time at pipeline section main body casting complete to smash with concrete, and this position also is the relative weak part of pipeline section, so require higher to its intensity, resistance to cleavage, anti-permeability performance.In the mix proportion scheme that uses, the pipeline section main body is identical with concrete proportioning with the pipeline section post-cast strip with concrete, has certain hidden danger at present.
Summary of the invention
The object of the present invention is to provide a kind of deposition tube tunneltron segment mix proportion, the pipeline section concrete that the present invention is made reaches and does not split, do not ooze, and satisfies requirements such as concrete density, intensity, slump design.
The present invention includes two portions content, the pipeline section main body is with concrete mix and pipeline section post-cast strip concrete mix.
Technical requirements:
Pipeline section main body concrete
In general, at present domesticly be to pipeline section main body concrete density, intensity, slump design requirements:
Design strength C35, the slump 120 ± 20mm, unit weight 2390 ± 10kg/m
3
Satisfy of the measure of pipeline section main body with concrete density, intensity, slump design requirements: the aggregate of selecting for use cement, fine mineral admixture, good collection functional and that label conforms to join, select proper proportioning.During actual the use, select the golden sheep board cement of excellent property for use, the flyash and the breeze of big volume, clean river sand, the stone of continuous grading 5～31.5mm has found the proportioning that satisfies concrete density, intensity, slump design requirements by a large amount of tests.
Improve the effective measure of pipeline section main body: from the concrete self performance with concrete crack resistance, controlling concrete hydration heat is an effective means of control distress in concrete, and want to control hydration heat of concrete, must reduce cement consumption as far as possible, adopt mineral admixture to replace cement; During practical application, adopted the flyash and the breeze of big volume, and only adopted lower cement consumption (10.5%).This measure has certain effect to the compensating action of concrete shrinkage, reduces the swell increment of expansive concrete simultaneously.
Improve the effective measure of pipeline section main body: reduce water consumption, improve the pore structure in the concrete, improve intensity with concrete permeability resistance; Mixing material that admixture is an amount of and admixture high efficiency water reducing agent.During practical application, water consumption (7.3%) has been controlled in strictness, has reduced water-cement ratio (0.42), simultaneously admixture breeze and flyash, and adopted high efficiency water reducing agent.
Pipeline section post-cast strip concrete
In general, at present domesticly with concrete density, intensity, slump design requirements be to the pipeline section post-cast strip:
Design strength C40, the slump 120 ± 20mm, unit weight 2390 ± 10kg/m
3
Satisfy of the measure of pipeline section post-cast strip: identical with concrete proportioning with the pipeline section main body with concrete density, intensity, slump design requirements, the aggregate of selecting for use cement, fine mineral admixture, good collection functional and that label conforms to join is selected proper proportioning.During actual the use, select the golden sheep board cement of excellent property for use, the breeze of big volume, clean river sand, the stone of continuous grading 5～31.5mm has found the proportioning that satisfies concrete density, intensity, slump design requirements by a large amount of tests.
Improve the effective measure of pipeline section post-cast strip: identical with concrete proportioning with the pipeline section main body with concrete resistance to cleavage, anti-permeability performance, concrete hydration heat is controlled with the concrete proportioning strictness in the pipeline section post-cast strip, reduce cement consumption as far as possible, reduce water consumption, adopted high efficiency water reducing agent, added breeze and replace the part cement consumption.
Simultaneously, for improving immersed tube pipeline section post-cast strip with concrete impervious, resistance to cleavage, the concrete structure that reaches the immersed tube pipeline section is from waterproof requirement, in the usefulness concrete of pipeline section post-cast strip admixture swelling agent and antiseepage defend and split fibre.Swelling agent has the compensate for shrinkage effect, can improve concrete in the shrinkage strain in each length of time, thereby reduces the generation of string stress significantly, and makes concrete structure more closely knit.On the one hand, early age strength of concrete is increased by a fairly big margin, improved tensile strength, on the other hand, sealed a large amount of pores in the concrete, improved concrete pore structure, make concrete impervious being improved.Admixture antiseepage defend and split fibre in concrete, it can mix with concrete material rapidly and easily, distribute extremely evenly, thoroughly, so can constitute a kind of uniform unrest to support system at inside concrete, be the effective means of non-structural cracks such as control concrete plastic shrinkage, drying shrinkage, impervious very meritorious to improving.
Mixing swelling agent and fiber greatest problem is that slump-loss is difficult to construction greatly, relative datum proportioning (being the proportioning of not mixing swelling agent and fiber), but water-cement ratio will suitably improve a little or improve the water reducer volume and could guarantee application property, otherwise mixes the water reducer adjustment slump of constructing after also needing to the scene.In the practical application, be to improve water-cement ratio, do not use flyash in the pipeline section post-cast strip in concrete gelling material, and only used cement and breeze.
Simultaneously, mix swelling agent or fiber and need suitably to increase admixture consumption or water consumption; Surpass saturation point as the admixture consumption, will produce phenomenons such as concrete hardens, grabs the end, causes the concrete bleeding, hysteresis bleeding.In the practical application, water all suitably improves than content in the pipeline section main body with the content of water reducer in the concrete proportioning of pipeline section post-cast strip.
The pipeline section main body with the concrete mass percent of concrete is: water 7.3%, cement 10.5%, flyash 2.1～3.5%, breeze 3.5～4.9%, sand 29.9%, stone 44.9%, high efficiency water reducing agent 0.4%.
The pipeline section post-cast strip with the concrete mass percent of concrete is: water 7.5%, cement 13.12～13.41%, breeze 3.33～3.41%, sand 30.23%, stone 43.52%, high efficiency water reducing agent 0.44%, fiber 0.03%, swelling agent 1.46～1.83%
The golden sheep board cement that the actual employing of above-mentioned said cement cement mill, Guangzhou produces, this cement characteristics is that hydration heat is lower, the early strength height, later strength is promoted, steady quality.
Above-mentioned said sand is clean river sand, and its fineness modulus is 2.5～3.1, adopts clean river sand in the batching, can reduce the concrete shrinkage cracking.
Above-mentioned said cobble-stone diameter satisfies 2/3 of bar spacing, and particle diameter is big more can to reduce shrinkage cracking more, adopts continuous grading 5～31.5mm.
Above-mentioned said high efficiency water reducing agent actual employing Tianjin Yong Yang giant dragon board UNF-5 liquid (high efficiency water reducing agent), its volume is 2.0% o'clock, water-reducing rate reaches 25%, initial set can reach 8～10h, final set can reach 12～14h, and mix exothermic peak in the time of can reducing hydrated cementitious greatly in the concrete, postpone the speed of heat release.Show that early strength is low slightly, later intensity rose gradually in 7 days, and intensity can reach 150～170% in 28 days.
Above-mentioned said flyash is II level flyash.Because flyash S
iO
2Content 〉=40%, the pozzolanic activity height can replace part cement, is beneficial to reduce hydration heat.According to the pertinent data introduction, the flyash of volume 15% can reduce hydration heat 15%; Flyash as the hole of stopping composition fill concrete, makes concrete finer and close because fineness ratio cement is also thin, has played the effect of weather resistance and volume stability.
Above-mentioned said breeze is a ground blast furnace slag, has good pectisation, can promote the development of concrete strength, reduces cement consumption, reduces hydration heat of concrete, and can reduce the concrete mix water consumption, increases degree of mobilization, suppresses effects such as alkali-aggregate reaction.
Above-mentioned said swelling agent is the Shijiazhuang JX type swelling agent that chemical industry company limited produces of cultivating people of ability, have compensating concrete drying shrinkage and air free concrete, the effect of raising concrete permeability resistance, this kind material is to belong to admixture and do not belong to mineral admixture and cement, is mainly used in civil engineering work aspect two of waterproof and the cracking resistances.The concrete that adds swelling agent must could play the compensate for shrinkage effect more than 14 days at the environment or the curing in water of humidity, otherwise maintenance is untimely not in place, and the rimose possibility is more serious.
Above-mentioned said fiber is the polypropylene mesh fiber (DS-W type) that Tai big Sheng engineering materials company limited produces, it can mix with concrete material rapidly and easily, distribute extremely evenly, thoroughly, so can constitute a kind of uniform unrest to support system at inside concrete, be the effective means of non-structural cracks such as control concrete plastic shrinkage, drying shrinkage, impervious very effective to improving.
Use in the concrete proportioning in pipeline section main body and pipeline section post-cast strip, cement, sand, stone are the concrete basic raw material of configuration.
Reality of the present invention has adopted golden sheep board cement, and this cement characteristics is that hydration heat is lower, the early strength height, and later strength is promoted, steady quality.Because this cement early strength height, later strength is promoted, and satisfies concrete intensity, durability Design requirement so the concrete that the cement of the relative general property of concrete that is configured by this brand cement configures is easier.If this hydrated cementitious is low than the cement of general property simultaneously, and steady quality is so adopt concrete that this cement configures having more obvious advantage aspect barrier performance, the anti crack performance than the concrete that the cement of general property configures.This patent is actual, and what adopt is clean river sand, its fineness modulus is 2.5～3.1, (sand accounts for the ratio of sand, stone total amount to sand coarse aggregate ratio, pipeline section main body concrete sand coarse aggregate ratio 0.66, post-cast strip concrete sand coarse aggregate ratio 0.69) minimum, the concrete that the sand that the concrete that such sand configures is general relatively configures is better effects if aspect minimizing concrete shrinkage cracking.The stone of the actual employing of this patent continuous grading 5～31.5mm can be saved cement like this and guarantee that concrete has good workability.
All adopted high efficiency water reducing agent with concrete and post-cast strip in concrete in the pipeline section main body, it mainly acts on as follows:
1. under the situation that does not change various raw material ratios, add concrete high efficiency water reducing agent, can not change concrete strength, simultaneously can increase substantially concrete rheological and plasticity-, make concrete construction can adopt gravity flow, pumping, need not mode such as vibration and construct, improve speed of application, reduce the construction energy consumption.
2. under the situation that does not change the various raw material ratios (dewatering) and the concrete slump, reduce the consumption of water, can improve concrete intensity greatly, early strong and later strength improves more than 60% and 20% than the concrete that does not add water reducer respectively.
3. under the situation that does not change various raw material ratios (removing cement) and concrete strength, can reduce the consumption of cement, the cement water reducing agent of admixture cement quality 0.2%～0.5% can be saved more than 15～30% of cement amount.
4. the admixture concrete high efficiency water reducing agent can improve the concrete life-span more than one times, even prolong more than one times the normal work-ing life of buildings.
The present invention is actual, and what adopt is Tianjin Yong Yang giant dragon board UNF-5 liquid high efficiency water reducing agent, and its volume is 2.0% o'clock, and water-reducing rate reaches 25%, initial set can reach 8～10h, final set can reach 12～14h, and mixes the exothermic peak in the time of can reducing hydrated cementitious greatly in the concrete, postpones the speed of heat release.Show that early strength is low slightly, later intensity rose gradually in 7 days, and intensity can reach 150～170% in 28 days.
Adopted II level flyash in the pipeline section main body in concrete.Because flyash S
iO
2Content 〉=40%, the pozzolanic activity height can replace part cement, is beneficial to reduce hydration heat.According to the pertinent data introduction, the flyash of volume 15% can reduce hydration heat 15%; Flyash as the hole of stopping composition fill concrete, makes concrete finer and close because fineness ratio cement is also thin, has played the effect of weather resistance and volume stability.
All adopted ground blast furnace slag with concrete and pipeline section post-cast strip in concrete in the pipeline section main body, breeze is the industrial waste of discharging in the iron manufacturing process, one ton of breeze that has 0.3 ton approximately of every refining, and its main chemical compositions is S
iO
2, Al
2O
3, CaO, MgO etc.Breeze behind the shrend chilling, wherein vitreum content is many, and structure is in the higher-energy state instability, and lateral reactivity is big, but must bring into play through levigate its lateral reactivity that just can make.When the ground blast furnace slag specific surface area greater than 4660cm
2During/g, the 1kg breeze will be above the effect of 1kg cement to the effect of 28d age strength in concrete.Mix ground blast furnace slag and can improve concrete intensity preferably, its mechanism is that breeze absorbs a large amount of CH crystal in the secondary hydration reaction, and making concrete is especially to diminish at the CH of interface region crystal grain to tail off, and owing to CH is sponged in a large number, thereby has promoted C
3S, C
2The hydration reaction speed of S has been improved concrete microstructure, has improved cement stone and aggregate interface binding intensity and has improved the pore structure of cement slurry, thereby improved concrete density.Make and mix that the concrete early strength of ground blast furnace slag is subjected to less or unaffected, and later stage intensity makes gain in strength more because of the continuous aquation of super finely ground slag, it is big more that ground blast furnace slag replaces cement amount, and then the late strength of concrete rate of increase is also big more.Simultaneously breeze equivalent replaces cement, saves cement consumption greatly, reduces hydration heat, reduces thermal stress and the distress in concrete that causes.And the breeze water requirement is low, can reduce water-binder ratio, increases concrete flowability, easily pumping improves concrete workability, improves the fresh concrete cohesion, improve the microtexture of cement slurry, increase concrete density, thereby improve concrete strength and weather resistance.Breeze and flyash are referred to as mineral admixture, add II level flyash and ground blast furnace slag in pipeline section main body concrete proportioning, have delayed time of coagulation, have alleviated the effect of hydration heat once more.
In the pipeline section post-cast strip with admixture in the concrete swelling agent and antiseepage defend and split fibre.Swelling agent has the compensate for shrinkage effect, can improve concrete in the shrinkage strain in each length of time, thereby reduces the generation of string stress significantly, and makes concrete structure more closely knit.On the one hand, early age strength of concrete is increased by a fairly big margin, improved tensile strength, on the other hand, sealed a large amount of pores in the concrete, improved concrete pore structure, make concrete impervious being improved.Admixture antiseepage defend and split fibre in concrete, it can mix with concrete material rapidly and easily, distribute extremely evenly, thoroughly, so can constitute a kind of uniform unrest to support system at inside concrete, be the effective means of non-structural cracks such as control concrete plastic shrinkage, drying shrinkage, impervious very meritorious to improving.
In sum, compare former pipeline section main body concrete mix, pipeline section main body of the present invention is with having added ground blast furnace slag in the concrete mix, the consumption and the cement consumption of water have further been reduced, these measures have effectively reduced the concrete hydration heat of pipeline section main body, the concrete unit weight of pipeline section main body, intensity, slump design requirements have been satisfied, the concrete resistance to cleavage of pipeline section main body, the anti-permeability performance that have improved.Compare former pipeline section post-cast strip concrete proportioning, the pipeline section post-cast strip of this patent is with having added ground blast furnace slag, swelling agent and antiseepage defend and split fibre in the concrete mix, do not use flyash, the consumption and the cement consumption of water also decrease, and the cofabrication pipeline section post-cast strip concrete strength that goes out improves a grade than pipeline section main body concrete strength.These measures have satisfied the pipeline section post-cast strip with concrete unit weight, intensity, slump design requirements, and the pipeline section post-cast strip of having improved is with concrete resistance to cleavage, anti-permeability performance.
By above argumentation as can be known, the pipeline section of being made by the present invention not only can satisfy pipeline section concrete design unit weight, strength grade requirement with concrete, and has good barrier performance, resistance to cleavage.The main batching of using is common sand, stone, cement, breeze and flyash.Though used exotic materials (high efficiency water reducing agent, swelling agent and fiber), amount ratio is less, and the use of these exotic materialss reduced cement consumption on the contrary, and overall cost is very not high, has good and economic.
Embodiment 1
1. pipeline section main body concrete quality proportioning: water 7.3%, cement 10.5%, flyash 2.1%, breeze 4.9%, sand 29.9%, stone 44.9%, high efficiency water reducing agent 0.4%.
Adopt the pipeline section main body concrete of this proportioning configuration: the about 23.7MPa of actual measurement 3d intensity reaches 68% of technical requirements intensity; The about 34.8MPa of 7d intensity reaches 99% of technical requirements intensity; The about 53.8MPa of 28d intensity reaches 154% of technical requirements intensity.The about 120mm of the slump, the about 2391kg/m of unit weight
3
2. pipeline section post-cast strip concrete quality proportioning: water 7.50%, cement 13.32%, breeze 3.38%, sand 30.23%, stone 43.52%, high efficiency water reducing agent 0.44%, fiber 0.03%, swelling agent 1.58%
Adopt the pipeline section post-cast strip concrete of this proportioning configuration: the about 31.8MPa of actual measurement 3d intensity reaches 80% of technical requirements intensity; The about 42.8MPa of 7d intensity reaches 107% of technical requirements intensity; The about 55.6MPa of 28d intensity reaches 139% of technical requirements intensity.The about 130mm of the slump, the about 2388kg/m of unit weight
3
The immersed tube pipeline section concrete that adopts this proportioning to make, workability is good when building; Unit weight, intensity, the slump all meet design requirement; And this concrete pipeline section is through the actual detection of pouring water, and the immersed tube pipeline section concrete that adopts this proportioning to make does not split, do not ooze, and satisfies technical requirements.
Example 2
1. pipeline section main body concrete quality per-cent: water 7.3%, cement 10.5%, flyash 2.6%, breeze 4.4%, sand 29.9%, stone 44.9%, high efficiency water reducing agent 0.4%.
Adopt the pipeline section main body concrete of this proportioning configuration: the about 21.8MPa of actual measurement 3d intensity reaches 62% of technical requirements intensity; The about 35.9MPa of 7d intensity reaches 103% of technical requirements intensity; The about 53.5MPa of 28d intensity reaches 153% of technical requirements intensity.The about 130mm of the slump, the about 2389kg/m of unit weight
3
2. pipeline section post-cast strip concrete quality per-cent: water 7.50%, cement 13.41%, breeze 3.41%, sand 30.23%, stone 43.52%, high efficiency water reducing agent 0.44%, fiber 0.03%, swelling agent 1.46%
Adopt the pipeline section post-cast strip concrete of this proportioning configuration: the about 32.5MPa of actual measurement 3d intensity reaches 81% of technical requirements intensity; The about 41.4MPa of 7d intensity reaches 104% of technical requirements intensity; The about 55.7MPa of 28d intensity reaches 139% of technical requirements intensity.The about 135mm of the slump, the about 2390kg/m of unit weight
3
The immersed tube pipeline section concrete that adopts this proportioning to make, workability is good when building; Unit weight, intensity, the slump all meet design requirement; And this concrete pipeline section is through the actual detection of pouring water, and the immersed tube pipeline section concrete that adopts this proportioning to make does not split, do not ooze, and satisfies technical requirements.
Example 3
1. pipeline section main body concrete quality per-cent: water 7.3%, cement 10.5%, flyash 3.2%, breeze 3.8%, sand 29.9%, stone 44.9%, high efficiency water reducing agent 0.4%.
Adopt the pipeline section main body concrete of this proportioning configuration: the about 23.5MPa of actual measurement 3d intensity reaches 67% of technical requirements intensity; The about 34.5MPa of 7d intensity reaches 99% of technical requirements intensity; The about 52.1MPa of 28d intensity reaches 149% of technical requirements intensity.The about 135mm of the slump, the about 2395kg/m of unit weight
3
2. pipeline section post-cast strip concrete quality per-cent: water 7.50%, cement 13.22%, breeze 3.36%, sand 30.23%, stone 43.52%, high efficiency water reducing agent 0.44%, fiber 0.03%, swelling agent 1.70%
Adopt the pipeline section post-cast strip concrete of this proportioning configuration: the about 30.4MPa of actual measurement 3d intensity reaches 76% of technical requirements intensity; The about 41.2MPa of 7d intensity reaches 103% of technical requirements intensity; The about 54.1MPa of 28d intensity reaches 135% of technical requirements intensity.The about 135mm of the slump, the about 2391kg/m of unit weight
3
The immersed tube pipeline section concrete that adopts this proportioning to make, workability is good when building; Unit weight, intensity, the slump all meet design requirement; And this concrete pipeline section is through the actual detection of pouring water, and the immersed tube pipeline section concrete that adopts this proportioning to make does not split, do not ooze, and satisfies technical requirements.
Example 4
1. pipeline section main body concrete quality per-cent: water 7.3%, cement 10.5%, flyash 3.5%, breeze 3.5%, sand 29.9%, stone 44.9%, high efficiency water reducing agent 0.4%.
Adopt the pipeline section main body concrete of this proportioning configuration: the about 29.9MPa of actual measurement 3d intensity reaches 85% of technical requirements intensity; The about 33.5MPa of 7d intensity reaches 105% of technical requirements intensity; The about 51.4MPa of 28d intensity reaches 141% of technical requirements intensity.The about 140mm of the slump, the about 2395kg/m of unit weight
3
2. pipeline section post-cast strip concrete quality per-cent: water 7.50%, cement 13.12%, breeze 3.33%, sand 30.23%, stone 43.52%, high efficiency water reducing agent 0.44%, fiber 0.03%, swelling agent 1.83%
Adopt the pipeline section post-cast strip concrete of this proportioning configuration: the about 30.9MPa of actual measurement 3d intensity reaches 77% of technical requirements intensity; The about 41.6MPa of 7d intensity reaches 104% of technical requirements intensity; The about 54.6MPa of 28d intensity reaches 136% of technical requirements intensity.The about 140mm of the slump, the about 2393kg/m of unit weight
3
The immersed tube pipeline section concrete that adopts this proportioning to make, workability is good when building; Unit weight, intensity, the slump all meet design requirement; And this concrete pipeline section is through the actual detection of pouring water, and the immersed tube pipeline section concrete that adopts this proportioning to make does not split, do not ooze, and satisfies technical requirements.
Claims (1)
1. a deposition tube tunneltron segment concrete mix is characterized in that comprising pipeline section main body concrete mix and pipeline section post-cast strip concrete mix; The mass percent of described pipeline section main body concrete mix is: water 7.3%, cement 10.5%, flyash 2.1～3.5%, breeze 3.5～4.9%, sand 29.9%, stone 44.9%, high efficiency water reducing agent 0.4%; The mass percent of described pipeline section post-cast strip concrete mix is: water 7.5%, cement 13.12～13.41%, breeze 3.33～3.41%, sand 30.23%, stone 43.52%, high efficiency water reducing agent 0.44%, fiber 0.03%, swelling agent 1.46～1.83%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100649410A CN101549976B (en) | 2009-05-18 | 2009-05-18 | Concrete mixing proportion for deposition tube tunneltron segment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100649410A CN101549976B (en) | 2009-05-18 | 2009-05-18 | Concrete mixing proportion for deposition tube tunneltron segment |
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| Publication Number | Publication Date |
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| CN101549976A true CN101549976A (en) | 2009-10-07 |
| CN101549976B CN101549976B (en) | 2011-09-28 |
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| CN2009100649410A Active CN101549976B (en) | 2009-05-18 | 2009-05-18 | Concrete mixing proportion for deposition tube tunneltron segment |
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| RU2463271C1 (en) * | 2011-03-29 | 2012-10-10 | Валерий Леонидович Николаенко | Concrete mixture |
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| CN108256748B (en) * | 2017-12-29 | 2021-05-25 | 上海建工集团股份有限公司 | Concrete pumpability control method based on rheological characteristics |
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| CN112321181A (en) * | 2020-11-25 | 2021-02-05 | 中国葛洲坝集团水泥有限公司 | Immersed tube cement and concrete |
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