CN107540298A - A kind of matching method of new C20 concrete - Google Patents
A kind of matching method of new C20 concrete Download PDFInfo
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- CN107540298A CN107540298A CN201610470299.6A CN201610470299A CN107540298A CN 107540298 A CN107540298 A CN 107540298A CN 201610470299 A CN201610470299 A CN 201610470299A CN 107540298 A CN107540298 A CN 107540298A
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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 present invention relates to a kind of matching method of new C20 concrete, it is characterised in that the concrete is made up of grain slag micro mist, cement, sand, stone, water, accelerator, retarder, steel fibre, the grain slag micro mist：Cement：Sand：Stone：Water：Accelerator：Retarder：The mass ratio of steel fibre is 235 250:155‑165:780‑790:778‑795：215‑240:23‑26:4‑5：12‑15.This method can effectively reduce the usage amount of cement in the reasonable scope, reduce the rebound degree of gunite, reduce the dust of field operation, improve the non-deformability of concrete, enhance the toughness and impact strength of concrete.
Description
Technical field
The present invention relates to a kind of concrete matched ratio method, and in particular to a kind of matching method of new C20 concrete, category
In preparation method of concrete technical field.
Background technology
Explosion is needed to reclaim ore resource in underground metal mine production process, the country rock in tunnel is by explosion after explosion
Phenomena such as broken inbreak can occur after the effect of shock wave, gunite is such as carried out not in time, the safety of personnel equipment can be made
Industry produces harm, and gunite mainly uses C20 concrete, requires higher to the compression strength of concrete, general production
In the proportioning that C20 concrete uses, the dosage of cement is too high to cause production cost to increase, and the dosage of cement is too low to be influenceed
The compression strength of concrete.The property of subsidiary product grain slag micro mist and cement is closely similar in Iron-smelting, grain slag micro mist price
About 50 yuan/ton, cement price is about 150 yuan/ton, if grain slag micro mist can be utilized to substitute a certain proportion of cement, a side
Face can reduce the consumption of cement, substantially reduce production cost consumption, it is contemplated that can save about 100 yuan/ton, on the other hand also may be used
To ensure that the compression strength of concrete meets underworkings gunite requirement, while added necessarily in concrete proportioning material
Accelerator, retarder and the steel fibre of ratio, the rebound degree of guncreting can be effectively reduced, dust is reduced, extends and mix
The plasticity for coagulating soil, the anti-bending strength, the toughness and impact resistance of reinforcement concrete that strengthen concrete.
The content of the invention
The present invention is exactly for technical problem present in prior art, there is provided a kind of proportioning of new C20 concrete
Method, this method can effectively reduce the usage amount of cement, reduce the rebound degree of gunite, reduce in the reasonable scope
The dust of field operation, the non-deformability of concrete is improved, enhance the toughness and impact strength of concrete.
To achieve these goals, technical scheme is as follows, a kind of matching method of new C20 concrete,
Characterized in that, the concrete is made up of grain slag micro mist, cement, sand, stone, water, accelerator, retarder, steel fibre, it is described
Grain slag micro mist：Cement：Sand：Stone：Water：Accelerator：Retarder：The mass ratio of steel fibre is 235-250:155-165:780-
790:778-795：215-240:23-26:4-5：12-15.Above concrete proportioning material composition is controlled by computer, accurate mass
Proportion requirement is added to mixing plant system, after being sufficiently stirred 2-3 minutes, passes through the concrete duct rolling of ground southeast well to well
Lower exploiting field -303m is horizontal, then is transported to the ground that exploiting field producing region needs to whitewash by the horizontal concrete delivery trucks of -303m
Point, sprayed by NORMET whitewashing chassis by standard to rock and help broken region, to reach supporting rock side, ensure that worker's operation is pacified
Full final purpose.
A kind of matching method of new C20 concrete, grain slag micro mist, cement, sand, stone, water in the concrete,
Accelerator, retarder, the mass ratio of steel fibre are 235:156:783:783：218:23.5:4：13.
A kind of matching method of new C20 concrete, it is the grain slag micro mist, cement, sand, stone, water, accelerator, slow
Solidifying agent, the mass ratio of steel fibre are 240:159:790:778：220:24.5:4.5：15.
A kind of matching method of new C20 concrete, it is the grain slag micro mist, cement, sand, stone, water, accelerator, slow
Solidifying agent, the mass ratio of steel fibre are 236:156:786:780：225:23.5:5.0：12.5.
A kind of matching method of new C20 concrete, it is the grain slag micro mist, cement, sand, stone, water, accelerator, slow
Solidifying agent, the mass ratio of steel fibre are 241:162:785:792：230:25.5:4.6：13.5.
A kind of matching method of new C20 concrete, it is the grain slag micro mist, cement, sand, stone, water, accelerator, slow
Solidifying agent, the mass ratio of steel fibre are 248:165:787:795：236:24.5:4.8：14.5.
A kind of matching method of new C20 concrete, it is the grain slag micro mist, cement, sand, stone, water, accelerator, slow
Solidifying agent, the mass ratio of steel fibre are 238:156:787:795：240:23.2:4.6：13.0.
As a modification of the present invention, the accelerator is Star build A700 (asterisk A700) accelerator, outside
See as oldlace powder, pH value 3.0 ± 1.0,1.430 ± 0.020g/ml of density, solids content 62.0 ± 3.1%.Product is examined
Standard inspection standard meets GB/T 8077-2000, and the rebound degree of gunite concrete, rebound degree can be effectively reduced after addition accelerator
Powder when being reduced to current 5% by 20% before, improve the upper wall effect of concrete, while decreasing field operation
Dirt, improve the operating environment of worker.
As a modification of the present invention, described retarder is that (asterisk HP320 concretes are efficient by Star build HP320
Retarder), pH value 11.5 ± 1.0,1.200 ± 0.020g/ml of density, solids content 30.0 ± 1.9%, chlorion Han Liang≤
1.0%, Jian Han Liang≤8.0%.Examination and test of products standard meets GB/T 8077-2000, can postpone hydrated reaction of cement, so as to prolong
The setting time of long concrete, the fresh concrete long period is kept plasticity, the convenient operation of transhipment over long distances, improve construction effect
Rate, while later concrete properties will not be had undesirable effect.
As a modification of the present invention, it is characterised in that described steel fibre adds for reinforced mortar or concrete
, the finer wire of length and diameter within the specific limits.Section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, diameter
For 0.2 ~ 0.6mm, draw ratio is 30 ~ 100.Steel fibre in concrete will not balling, be evenly distributed, can be stirred in guncreting
Station is mixed to be produced and pumping construction can be used for.The real work of steel fiber reinforced concrete is common mixed better than the identical slump
Solidifying soil.Steel fiber reinforced concrete has good material property, and compared with normal concrete, its compression strength improves 2 ~ 20%;Curved drawing
Intensity improves 20 ~ 50%;Tensile splitting strength improves 20 ~ 40%;Anti-wear performance improves 40% or so, and its physical force rationality can be completely
The technical indicator of underground gunite concrete demand can be met.The coarse and clean surface of steel fibre, can with concrete
Cement slurry firmly combine, this be steel fibre improve the various performances of concrete basic reason.
As the further optimization of the present invention, described sand is medium coarse sand；Described sand is thick in water content not deduct
Sand；Described water is without the water content plus sand；Described cement is the cement of P.042.5 rank；The grain of described stone
Footpath is no more than 15mm.
The advantages of above-mentioned technical proposal, is as follows：
1.1 grain slag micro mists substitute cement
Grain slag micro mist is formed during the blast furnace slag of hot melt state is placed in water rapidly cooling, mainly there is slag bath water quenching
Or stokehold water quenching two ways.Grain slag micro mist makees building materials and is used to produce cement and concrete, because grain slag micro mist has potentially
Hydraulic gelling property, can be as high-quality cement raw material under clinker, lime, gypsum equal excitation agent effect.
The main chemical compositions composition of grain slag micro mist mainly has CaCO3, Mg (OH) 2, Mg (OH) 2MgCO3, Mg3 (PO4)
2nd, (PO4) 6 of Ca10 (OH) 2,3MgO2SiO22H2O, Fe2O3 and Fe3O4 etc..With super-active, as admixture
Mix in cement concrete, can be reacted with Ca (OH) 2, Mg (OH) 2 caused by C2S and C2S aquations in cement, further form water
Change calcium silicates, magnesium silicate product, be filled in the hole of cement concrete, increase substantially the consistency of cement concrete, together
When the relatively low Ca of intensity (OH) 2, the crystal transformations of Mg (OH) 2 turned into the higher hydrated calcium silicate gel of intensity so that cement
A series of performances of concrete significantly improve.
Grain slag micro mist advantage
Grain slag micro mist substitutes the cement consumption in various uses concrete and cement products, can significantly improve concrete and water
The combination property of mud product.New admixture of the grain slag micro mist as high performance concrete, having improves the various performances of concrete
The advantages of, it is embodied in：
1）The intensity of cement concrete can be increased substantially, Ultrastrength cement concrete can be made；
2）The alkali-aggregate reaction of cement concrete can effectively be suppressed, significantly improve the alkali resistant aggregate reaction of cement concrete
Energy, improve the durability of cement concrete；
3）The resistant to sea water etch performance of cement concrete can be effectively improved, especially suitable for resistant to sea water engineering；
4）The bleeding quantity of cement concrete can be substantially reduced, improves the workability of concrete；
5）The compactness of cement concrete can be significantly improved, improves the impermeability of cement concrete；
6）The heat of hydration of cement concrete can be significantly reduced, suitable for configuring mass concrete；
Grain slag micro mist is with respect to the substitute slag micropowder contrast commonly used in cement：
1）Grain slag micro mist is thinner than the fineness of slag micropowder, and grain slag micro mist processing fineness is generally specific surface area 300/400m2/
Kg, purpose words are converted between 325-400 mesh.And the processing fineness in general specific surface area of slag micropowder is only capable of reaching
400m2/ kg ~ 500m2/ kg, purpose words are converted between 425-500 mesh, characteristic of the grain slag micro mist performance closer to cement.
2）Slag micropowder is that the additional a small amount of grinding aid of the slag for discharging iron blast furnace is a kind of obtained from after superfine grinding
Powdered product.Its main chemical compositions is SiO2, AI2O3 and CaO, and the main chemical compositions composition of contrast grain slag micro mist is main
Have CaCO3, Mg (OH) 2, Mg (OH) 2MgCO3, Mg3 (PO4) 2, (PO4) 6 of Ca10 (OH) 2,3MgO2SiO22H2O,
Fe2O3 and Fe3O4 etc., it can be seen that grain slag micro mist contains the chemical constituent of more calcium, magnesium, silicon, ferro element, grain slag micro mist ratio
Slag micropowder has higher activity, it is easier to participates in the physical and chemical reaction of cement concrete, more efficient improvement concrete is various
Performance.
Accelerator
The accelerator used in the present invention is Star build A700 (asterisk A700) accelerator, and outward appearance is oldlace powdery
Thing, pH value 3.0 ± 1.0,1.430 ± 0.020g/ml of density, solids content 62.0 ± 3.1%, examination and test of products standard meet
GB/T 8077-2000, the rebound degree of gunite concrete can be effectively reduced after adding accelerator, rebound degree is by before
20% be reduced to current 5%, dust when improving the upper wall effect of concrete, while decreasing field operation, improve
The operating environment of worker.
Retarder
The retarder used in the present invention is Star build HP320 (asterisk HP320 concretes high-efficient retarder), pH value 11.5 ±
1.0,1.200 ± 0.020g/ml of density, solids content 30.0 ± 1.9%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%, production
Product test stone meets GB/T 8077-2000, can postpone hydrated reaction of cement, so as to extend the setting time of concrete, makes
The fresh concrete long period keeps plasticity, the convenient operation of transhipment over long distances, improves efficiency of construction, while each to later concrete
Item performance will not have undesirable effect.
Steel fibre
The steel fibre used in the present invention be reinforced mortar or concrete and add, length and diameter within the specific limits
Finer wire.Section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, and a diameter of 0.2 ~ 0.6mm, draw ratio is 30 ~ 100.
Steel fibre in concrete will not balling, be evenly distributed, can be produced in guncreting mixing plant and pumping can be used for and applied
Work.The real work of steel fiber reinforced concrete is better than the normal concrete of the identical slump.Steel fiber reinforced concrete has good
Material property, compared with normal concrete, its compression strength improve 2 ~ 20%;Flexural tensile strength improves 20 ~ 50%;Split-tension of Rolled is strong
Degree improves 20 ~ 40%;Anti-wear performance improves 40% or so, and its physical force rationality can meet underground gunite concrete completely
The technical indicator of demand.The coarse and clean surface of steel fibre, can firmly it be combined with the cement slurry in concrete, this is steel
Fiber improves the basic reason of the various performances of concrete.
Using said ratio, the usage amount of cement can be effectively reduced in the reasonable scope, reduces returning for gunite
Bullet rate, reduce the dust of field operation, improve the non-deformability of concrete, enhance toughness and the shock resistance of concrete
Intensity, supporting production cost is reduced, the slump of the concrete produced is in 130 ± 20mm, and the compression strength of concrete is
Through reaching 22.6-25.8MPa, C20 concrete requirements are complied fully with.
Embodiment：
In order to deepen the understanding of the present invention, this case is described in detail with reference to embodiment.
Embodiment 1：
A kind of concrete matched ratio method of metal mine underground gunite novel C 20, grain slag micro mist, cement in the concrete,
Sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 240:159:790:778：220:24.5:4.5：15.Sand
For medium coarse sand, sand is the medium coarse sand for not deducting water content, and water is without the water content plus sand, and cement is P.042.5 rank
Cement, the particle diameter of stone is that accelerator is Star build A700 (asterisk A700) accelerator no more than 15mm,（Outward appearance is
Oldlace powder, pH value 2.3, density 1.433g/ml, solids content 61.6%, examination and test of products standard meet GB/T 8077-
2000）, retarder is Star build HP320 (asterisk HP320) concrete high-efficient retarder（PH value 10.9, density 1.320g/
Ml, solids content 30.5%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%, examination and test of products standard meet GB/T 8077-
2000）, steel fibre is that section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, a diameter of 0.2 ~ 0.6mm, and draw ratio is
30~100.The slump for the concrete produced has reached 22.6MPa in 140mm, the compression strength of concrete 28d maintenances,
Comply fully with C20 concrete requirements.
Embodiment 2：
A kind of concrete matched ratio method of metal mine underground gunite novel C 20, grain slag micro mist, cement in the concrete,
Sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 236:156:786:780：225:23.5:5.0：12.5.
Sand is medium coarse sand, and sand is the medium coarse sand for not deducting water content, and water is without the water content plus sand, and cement is P.042.5 rank
Cement, the particle diameter of stone is that accelerator is Star build A700 (asterisk A700) accelerator no more than 15mm,（Outward appearance
Meet GB/T for oldlace powder, pH value 3.3, density 1.553g/ml, solids content 63.8%, examination and test of products standard
8077-2000）, retarder is Star build HP320 (asterisk HP320) concrete high-efficient retarder（PH value 11.9, density
1.210g/ml, solids content 31.5%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%, examination and test of products standard meet GB/T
8077-2000）, steel fibre is that section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, a diameter of 0.2 ~ 0.6mm, is grown
Footpath ratio is 30 ~ 100.The slump for the concrete produced has reached in 135mm, the compression strength of concrete 28d maintenances
23.9MPa, comply fully with C20 concrete requirements.
Embodiment 3：
A kind of concrete matched ratio method of metal mine underground gunite novel C 20, grain slag micro mist, cement in the concrete,
Sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 241:162:785:792：230:25.5:4.6：13.5.
Sand is medium coarse sand, and sand is the medium coarse sand for not deducting water content, and water is without the water content plus sand, and cement is P.042.5 rank
Cement, the particle diameter of stone is that accelerator is Star build A700 (asterisk A700) accelerator no more than 15mm,（Outward appearance
Meet GB/T for oldlace powder, pH value 3.6, density 1.565g/ml, solids content 62.2%, examination and test of products standard
8077-2000）, retarder is Star build HP320 (asterisk HP320) concrete high-efficient retarder（PH value 10.6, density
1.110g/ml, solids content 32.0%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%, examination and test of products standard meet GB/T
8077-2000）, steel fibre is that section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, a diameter of 0.2 ~ 0.6mm, is grown
Footpath ratio is 30 ~ 100.The slump for the concrete produced has reached in 145mm, the compression strength of concrete 28d maintenances
24.3MPa, comply fully with C20 concrete requirements.
Embodiment 4：
A kind of concrete matched ratio method of metal mine underground gunite novel C 20, grain slag micro mist, cement in the concrete,
Sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 248:165:787:795：236:24.5:4.8：14.5.
Sand is medium coarse sand, and sand is the medium coarse sand for not deducting water content, and water is without the water content plus sand, and cement is P.042.5 rank
Cement, the particle diameter of stone is that accelerator is Star build A700 (asterisk A700) accelerator no more than 15mm,（Outward appearance
Meet GB/T for oldlace powder, pH value 3.8, density 1.558g/ml, solids content 61.5%, examination and test of products standard
8077-2000）, retarder is Star build HP320 (asterisk HP320) concrete high-efficient retarder（PH value 10.8, density
1.113g/ml, solids content 31.6%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%, examination and test of products standard meet GB/T
8077-2000）, steel fibre is that section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, a diameter of 0.2 ~ 0.6mm, is grown
Footpath ratio is 30 ~ 100.The slump for the concrete produced has reached in 129mm, the compression strength of concrete 28d maintenances
25.8MPa, comply fully with C20 concrete requirements.
Embodiment 5：
A kind of concrete matched ratio method of metal mine underground gunite novel C 20, grain slag micro mist, cement in the concrete,
Sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 238:156:787:795：240:23.2:4.6：13.0.
Sand is medium coarse sand, and sand is the medium coarse sand for not deducting water content, and water is without the water content plus sand, and cement is P.042.5 rank
Cement, the particle diameter of stone is that accelerator is Star build A700 (asterisk A700) accelerator no more than 15mm,（Outward appearance
Meet GB/T for oldlace powder, pH value 3.5, density 1.585g/ml, solids content 60.9%, examination and test of products standard
8077-2000）, retarder is Star build HP320 (asterisk HP320) concrete high-efficient retarder（PH value 10.5, density
1.131g/ml, solids content 31.8%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%, examination and test of products standard meet GB/T
8077-2000）, steel fibre is that section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, a diameter of 0.2 ~ 0.6mm, is grown
Footpath ratio is 30 ~ 100.The slump for the concrete produced has reached in 149mm, the compression strength of concrete 28d maintenances
25.5MPa, comply fully with C20 concrete requirements.
By above table as can be seen that the slump of the guncreting for the concrete matched ratio method production that the invention provides
Degree, the index of compression strength are horizontal significantly better than existing actual techniques, and underground site application feature is good.
Present invention specific implementation is pressed by Mining Industry Subsidiary Company supporting subsidiary factory of Nanjing Meishan Metallurgy Co., Ltd. of Baoshan Iron and Steel Group
Construct according to scheme, completed about in underground -288m, -303m, -318m, -330m, -348m levels since experiment in this way
The gunite in the unstable tunnels such as 3000m3 is broken, inbreak, crack, after the maintenance of 28 days, bulk strength is after testing
Through reaching 22.6-25.8MPa, the intensity requirement of C20 concrete has been fully met, while has substituted 249 tons of cement, has saved economy
About 2.5 ten thousand yuan of cost, it is contemplated that about 1000 tons of the alternative cement of grain slag micro mist is applied every year, about 100,000 yuan of financial cost can be saved,
Long-term use can effectively reduce supporting production cost, while add a certain proportion of accelerator in concrete proportioning material, delay
Solidifying agent and steel fibre, the rebound degree of guncreting, the plasticity for reducing dust, extending concrete, enhancing can be effectively reduced
The anti-bending strength of concrete, the toughness and impact resistance for strengthening concrete.
It should be noted that above-described embodiment, is not used for limiting protection scope of the present invention, in above-mentioned technical proposal
On the basis of made equivalents or replacement each fall within the scope that the claims in the present invention are protected.
Claims (10)
- A kind of 1. matching method of new C20 concrete, it is characterised in that the concrete by grain slag micro mist, cement, sand, Stone, water, accelerator, retarder, steel fibre composition, the grain slag micro mist：Cement：Sand：Stone：Water：Accelerator：Retarder： The mass ratio of steel fibre is 235-250:155-165:780-790:778-795：215-240:23-26:4-5：12-15.
- 2. the matching method of new C20 concrete according to claim 1, it is characterised in that in the concrete Grain slag micro mist, cement, sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 235:156:783:783：218: 23.5:4：13.
- 3. the matching method of new C20 concrete according to claim 1, it is characterised in that the grain slag micro mist, water Mud, sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 240:159:790:778：220:24.5:4.5： 15。
- 4. the matching method of new C20 concrete according to claim 1, it is characterised in that the grain slag micro mist, water Mud, sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 236:156:786:780：225:23.5:5.0： 12.5。
- 5. the matching method of new C20 concrete according to claim 1, it is characterised in that the grain slag micro mist, water Mud, sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 241:162:785:792：230:25.5:4.6： 13.5。
- 6. the matching method of new C20 concrete according to claim 1, it is characterised in that the grain slag micro mist, water Mud, sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 248:165:787:795：236:24.5:4.8： 14.5。
- 7. the matching method of new C20 concrete according to claim 1, it is characterised in that the grain slag micro mist, water Mud, sand, stone, water, accelerator, retarder, the mass ratio of steel fibre are 238:156:787:795：240:23.2:4.6： 13.0。
- 8. the matching method of the new C20 concrete according to claim any one of 1-7, it is characterised in that the speed Solidifying agent pH value 3.0 ± 1.0,1.430 ± 0.020g/ml of density, solids content 62.0 ± 3.1%.
- 9. the matching method of the new C20 concrete according to claim any one of 1-7, it is characterised in that described Retarder pH value 11.5 ± 1.0,1.200 ± 0.020g/ml of density, solids content 30.0 ± 1.9%, chlorion Han Liang≤1.0%, Jian Han Liang≤8.0%.
- 10. the matching method of the new C20 concrete according to claim any one of 1-7, it is characterised in that described Steel fibre section is the circular straight steel fibre of length, and its length is 10 ~ 60mm, and a diameter of 0.2 ~ 0.6mm, draw ratio is 30 ~ 100.
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| CN113266091A (en) * | 2021-03-11 | 2021-08-17 | 中交第三航务工程局有限公司 | Construction process of space torsional curved-surface wood grain fair-faced concrete wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113266091A (en) * | 2021-03-11 | 2021-08-17 | 中交第三航务工程局有限公司 | Construction process of space torsional curved-surface wood grain fair-faced concrete wall |
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