CN108218472A - A kind of construction method of silicon ash cementitious material against corrosion in highway - Google Patents
A kind of construction method of silicon ash cementitious material against corrosion in highway Download PDFInfo
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- CN108218472A CN108218472A CN201711368612.6A CN201711368612A CN108218472A CN 108218472 A CN108218472 A CN 108218472A CN 201711368612 A CN201711368612 A CN 201711368612A CN 108218472 A CN108218472 A CN 108218472A
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
- C04B38/106—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam by adding preformed foams
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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
- C04B28/04—Portland cements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of construction method of silicon ash cementitious material against corrosion in highway.This construction method includes the following steps：1) Silica fume cement slurry is prepared：First silicon ash, cement, miberal powder, flyash, gypsum and bauxite are mixed, then is mixed with water, obtain Silica fume cement slurry；2) foam is prepared：Foaming agent solution foaming is expedited the emergence of, obtains foam；3) foam silica-on-silicon optical waveguides are prepared：By Silica fume cement slurry and foams mix, foam silica-on-silicon optical waveguides are obtained；4) foam silica-on-silicon optical waveguides are poured into a mould：Foam silica-on-silicon optical waveguides are sent by pipeline to construction of the highway region, gravity flow pouring；5) foam silica-on-silicon optical waveguides conserve：After foam silica-on-silicon optical waveguides final set, watering maintenance.The present invention proposes to be applied to a kind of silicon ash cementitious material against corrosion in the highway high roadbed of foam concrete, which can realize continuous cast, and its casting quality meets the requirement of site operation.
Description
Technical field
The present invention relates to a kind of construction method of silicon ash cementitious material against corrosion in highway.
Background technology
It in mountain area building highway, is limited by landform, landforms, hydrogeologic condition, inevitably needs pair
Existing roadbed carries out high roadbed enlarging construction；While in order to meet the planning requirement of national entirety and preferably make good use of excavation
Earthwork resource, when carrying out highway extension project can more and more use high-fill roadbed form.Height etc. in mountain area
In grade highway, embankment and cut subgrade account for 80%, wherein not within minority more than the high-filled embankment of 20m.And with state's housekeeping
The promotion of plan, transport development are quickly grown, and the structure type of high embankment is either in number in highway extension project from now on
In amount or in height, all it will further improve, high embankment also will be as the principal mode of road structure.
It is higher to its bottom foundation trench requirement for bearing capacity since soil body vertical pressure is larger in high-fill roadbed region, and
Often due to the duration is tighter, its sufficient static balance time can not be given, cause newly to repair roads easily goes out in use
Existing differential settlement phenomenon.And the concrete light of light foam concrete weight ratio same volume, account for about 30%~50%, Ke Yi great
It is big to reduce relevant pressure and posterior settlement, therefore the high roadbed application of light foam concrete progress highway is used, it can be extensive
It saves the maintenance cost in later stage and ensures traffic safety.
SO in the seawater4 2-The content of ion can generate the building of coastal area very big up to 2500~2700mg/L
Corrosion, and coastal area is all economically developed area, there is the building such as high buildings and large mansions, highway bridge and culvert and one of many large sizes
A little bridge spanning the seas, seawater corrosion can cause very big loss to economic and life；There are many salt-soda soils, salt in western China
In the prevalence of sulfate in lake region and underground water, it can generate the highway bridge and culvert and structure of cement concrete apparent
Corrosiveness, and a kind of harsh corrosive environment is formed to structure foundation and underground installation, influence its durability and safety.
Many documents show：Most of sulfate has significant corrosion function for the cement slurry of hardening.
Sulfate includes two kinds of forms of physics and chemical attack to the corrosion of cement material, and general corrosion process is all physics
It is carried out at the same time with the synthesis of chemical attack.Corrosion mechanism is also complex, so far not yet completely clearly specific corrosion process.
Physics corrosion is referred to as " a kind of special corrosion type ", mainly by Na2SO4To Na2SO4·10H2O transformations cause, process
It generates crystallization pressure and causes cracking and flaking off for concrete material.Chemical attack be mainly corrosive medium by micro-crack enter
The inside of Behavior of Hardened Cement Paste, sulfate ion and hydrolysis product of cement Ca (OH)2Reaction forms gypsum, then reacts and give birth to drated calcium aluminate
Into entringite, so as to which solid volume be made to increase respectively 124% and 94%, volume expansion generates internal stress, makes concrete material
Material cracks and flakes off, therefore drated calcium aluminate and Ca (OH)2Presence be to cause the primary factor of chemical attack.
In order to solve the problems, such as that above-mentioned sulfate corrodes cement material, a kind of highway high roadbed that is suitable for of research and development is needed to use
Cementitious material against corrosion.
Invention content
The purpose of the present invention is to provide a kind of construction method of silicon ash cementitious material against corrosion in highway.
The technical solution used in the present invention is：
A kind of construction method of silicon ash cementitious material against corrosion in highway, includes the following steps：
1) Silica fume cement slurry is prepared：In blender, first by silicon ash, cement, miberal powder, flyash, gypsum and bauxite
Mixing, then mixed with water, obtain Silica fume cement slurry；
2) foam is prepared：In foaming machine, by concrete foamer and water mixed preparing foaming agent solution, foaming agent is expedited the emergence of
Solution foaming obtains foam；
3) foam silica-on-silicon optical waveguides are prepared：By Silica fume cement slurry and foams mix, foam silica-on-silicon optical waveguides are obtained；
4) foam silica-on-silicon optical waveguides are poured into a mould：Foam silica-on-silicon optical waveguides are sent by pipeline to construction of the highway region, gravity flow is poured
Note；
5) foam silica-on-silicon optical waveguides conserve：After foam silica-on-silicon optical waveguides final set, watering maintenance.
In step 1), silicon ash, cement, miberal powder, flyash, gypsum and bauxite mass ratio be 1：(1.2~1.6)：
(2.2~2.6)：(2.6~3)：(0.8~1.2)：(0.15~0.25)：(0.15~0.25).
In step 1), the specific surface area of silicon ash is 18m2/ g~25m2/ g, the SiO of silicon ash2Content>92wt%.
In step 1), the solid content of Silica fume cement slurry is 55wt%~65wt%.
In step 2), the mass ratio 1 of concrete foamer and water：(18~20)；It is to pass through air compressor to expedite the emergence of foaming
Foaming is expedited the emergence of, the operating pressure of air compressor is 0.7MPa~0.9MPa；Expansion ratio for foaming agent solution volume 18~
22 times.
In step 3), foam accounts for the 60%~70% of foam silica-on-silicon optical waveguides total volume.
In step 3), the wet density of foam silica-on-silicon optical waveguides is controlled in 500kg/m3~600kg/m3。
In step 4), construction of the highway region is that construction site is separated into several pieces of construction area with template, template
Highly≤1m, area≤400m of every piece of construction area2。
In step 4), the outlet of pipeline is concordant with the casting area of foam silica-on-silicon optical waveguides.
In step 5), the time of maintenance is no less than 10 days.
The beneficial effects of the invention are as follows：
The present invention proposes to be applied to a kind of silicon ash cementitious material against corrosion in the highway high roadbed of foam concrete, the construction
Simple process is efficient, can realize continuous cast, and its casting quality meets the requirement of site operation.
Specific embodiment
A kind of construction method of silicon ash cementitious material against corrosion in highway, includes the following steps：
1) Silica fume cement slurry is prepared：In blender, first by silicon ash, cement, miberal powder, flyash, gypsum and bauxite
Mixing, then mixed with water, obtain Silica fume cement slurry；
2) foam is prepared：In foaming machine, by concrete foamer and water mixed preparing foaming agent solution, foaming agent is expedited the emergence of
Solution foaming obtains foam；
3) foam silica-on-silicon optical waveguides are prepared：By Silica fume cement slurry and foams mix, foam silica-on-silicon optical waveguides are obtained；
4) foam silica-on-silicon optical waveguides are poured into a mould：Foam silica-on-silicon optical waveguides are sent by pipeline to construction of the highway region, gravity flow is poured
Note；
5) foam silica-on-silicon optical waveguides conserve：After foam silica-on-silicon optical waveguides final set, watering maintenance.
Preferably, in step 1), silicon ash, cement, miberal powder, flyash, gypsum and bauxite mass ratio be 1：(1.2~
1.6)：(2.2~2.6)：(2.6~3)：(0.8~1.2)：(0.15~0.25)：(0.15~0.25)；It is further preferred that step
It is rapid 1) in, silicon ash, cement, miberal powder, flyash, gypsum and bauxite mass ratio be 1：(1.3~1.5)：(2.3~2.5)：
(2.7~2.9)：(0.9~1.1)：(0.18~0.22)：(0.18~0.22).
Preferably, in step 1), the specific surface area of silicon ash is 18m2/ g~25m2/ g, the SiO of silicon ash2Content>92wt%.
Preferably, in step 1), cement is Portland cement, and miberal powder is ground granulated blast furnace slag, and flyash is II grade of F class
Flyash.
Preferably, in step 1), the solid content of Silica fume cement slurry is 55wt%~65wt%；It is further preferred that step
It is rapid 1) in, the solid content of Silica fume cement slurry is 60wt%.
Preferably, in step 2), the mass ratio 1 of concrete foamer and water：(18~20)；It is to pass through air to expedite the emergence of foaming
Compressor expedites the emergence of foaming, and the operating pressure of air compressor is 0.7MPa~0.9MPa；Expansion ratio is foaming agent solution volume
18~22 times；It is further preferred that in step 2), the mass ratio 1 of concrete foamer and water：19；It is to pass through to expedite the emergence of foaming
Air compressor expedites the emergence of foaming, and the operating pressure of air compressor is 0.8MPa；Expansion ratio is the 20 of foaming agent solution volume
Times.
Further, in step 2), concrete foamer prepares the Traditional blowing agents used, such as rosin for Foam lightweight soil
Sour soaps foaming agent, metallic aluminium powder foaming agent, vegetable protein foaming agent, animal protein foaming agent, resin soaps foaming agent, hydrolysis
Blood glue foaming agent, mahogany acid aluminium foaming agent etc..
Preferably, in step 3), foam accounts for the 60%~70% of foam silica-on-silicon optical waveguides total volume.
Preferably, in step 3), the wet density of foam silica-on-silicon optical waveguides is controlled in 500kg/m3~600kg/m3。
Preferably, in step 4), construction of the highway region is that construction site is separated into several pieces of construction area with template,
Height≤1m of template, area≤400m of every piece of construction area2。
Preferably, in step 4), the outlet of pipeline is concordant with the casting area of foam silica-on-silicon optical waveguides.
Preferably, in step 5), the time of maintenance is no less than 10 days；It is further preferred that in step 5), the time of maintenance
It is 10~14 days.
Present disclosure is described in further detail below by way of specific embodiment.
Embodiment：
1st, construction site prepares
Farm Planning includes：Levelling of the land cleans place rubbish and floating dust, the surface dust in place cleaning, in order to avoid influence to pour
The binding force of foam concrete and base after note keeps pending place clean, smooth, firm and dry；During dry weather
Watering pretreatment is carried out to place, place is soaked, at least spills twice, to increase the binding force of pouring layer and base, but base's table
Face must not have apparent ponding, to prevent base from causing the lather collapse in foam concrete due to water suction is excessive；To construct field
Ground is separated into area no more than 400m with template2Region, and with falsework fixed form, prevent foam in work progress from mixing
Solidifying earth lateral pressure causes template to collapse；Form height needs to adjust according to each construction, and each construction height is no more than 1m.
2nd, Silica fume cement slurry is prepared
By the cement of 175 parts of mass parts, the miberal powder of 300 parts of mass parts, the flyash of 350 parts of mass parts, 125 parts of mass parts
Silicon ash, the aluminium vanadine of the gypsum of 25 parts of mass parts and 25 parts of mass parts, which is added in blender, to be stirred 10-15 minutes, speed of agitator
Control is in 20~40r/min, airborne dust during preventing powder from stirring；667 parts of quality are added in tentatively uniformly mixed agitator
Water, be then turned on blender continue stir 10min, be mixed into a concentration of 60% Silica fume cement slurry.
Cement used is the common PO42.5 cement of China Resources board；Miberal powder is blast-furnace cinder through crushing, screening gained, change
The ratio for studying part and various composition is：SiO2Content is 39.25wt%, CaO content 39.36wt%, and content of MgO is
7.43wt%, Al2O3Content is 12.22wt%, and the oxide content of S is 1.32wt%, and other oxides account for 0.42wt%；It is high
The particle diameter distribution of stove slag powders is：Particle of the grain size less than 2.65 μm accounts for 9wt%, and particle of the grain size less than 5.3 μm accounts for 35wt%,
Particle of the grain size less than 7.55 μm accounts for 53wt%, and particle of the grain size less than 10.71 μm accounts for 65wt%, and grain size is less than 26.62 μm
Particle accounts for 90wt%；Flyash is II grade of F class flyash；Silicon ash is the EBS- of Chengdu east blue star science and technology Development Co., Ltd production
S type silicon ashes, the specific surface area of determination of nitrogen adsorption is 20m2/ g, density 2.26g/cm3；The composition of silicon ash is SiO2Content is
93.6%, Al2O3Content is 0.51%, Fe2O3Content is 1.02%, and CaO content 0.63%, content of MgO 0.97%, remaining is
Loss on ignition；The CaSO of gypsum4Content >=99.8%, particle diameter distribution are：Particle of the grain size less than 3.12 μm accounts for 10wt%, and grain size is small
40wt% is accounted in 5.35 μm of particles, particle of the grain size less than 6.83 μm accounts for 40wt%, and particle of the grain size less than 7.48 μm accounts for
60wt%, particle of the grain size less than 36.38 μm account for 90wt%；Each chemical analysis ratio of bauxite is：SiO2Content is 8.17%,
Al2O3Content is 85.07%, Fe2O3Content is 1.18%, TiO2Content is 3.76%, CaO content 0.24%, and content of MgO is
0.21%, K2O content is 0.44%；Bauxite accounts for 99.5wt% by the ratio of 200 mesh grain sizes.
Choose the common PO42.5 cement of China Resources board compared as gelling agent, same method by PO42.5 cement with
Water is mixed into 60% comparative example cement slurry.The embodiment Silica fume cement slurry being prepared and the slurry of comparative example are distinguished
Corrosive nature test is carried out, test method is：1. slurry is poured in three joint-trial mould of 70.7*70.7*70.7mm standards, every group
Sample pours into a mould two groups, test specimen moisture room temperature conserve 1 day, water Plays support 28 days, then immerse tap water and 5% respectively
Na2SO4It is conserved 15 weeks in solution, measures the average value of its pressure；2. slurry is poured in three joint-trial mould of 40*40*160mm standards,
Every group of sample pours into a mould two groups, and test specimen is supported 28 days in moisture room temperature maintenance 1 day, water Plays, then immerses tap water and 5% respectively
Na2SO4It is conserved 15 weeks in solution, measures its expansion rate.The results show that in test 1., the test specimen of comparative example is in originally water curing
And 5% Na2SO4Intensity results in being conserved in solution are respectively 29.5MPa and 22.6MPa, and the test specimen of the present embodiment divides
It Wei not 30.8MPa and 27.4MPa；In test 2., the test specimen of comparative example is in originally water curing and 5% Na2SO4It is supported in solution
Expansion rate result in shield is respectively 1.42 × 10-4With 2.56 × 10-4, and the test specimen of the present embodiment is respectively 0.51 × 10-4With
0.92×10-4.It can be seen that the silicon ash cementitious material of the present embodiment has better corrosion resistance than ordinary cement.
3rd, foam is prepared
The foaming agent feed pipe of foaming machine is connected in concrete foamer, while connects the water inlet pipe of foaming machine, is set
Good dilution ratio is 20, i.e., the mass ratio of foaming agent and water is 1：19, it is made into foaming agent solution.Then air compression is connected
Machine, the pressure for setting air compressor is 0.8MPa, starts to foam, and final expansion ratio is 20 times, i.e., foams by volume
Agent solution：Foam=1：20, foam diameter is 0.5~3mm.
4th, foam silica-on-silicon optical waveguides are prepared
Silica fume cement slurry that step prepares at the uniform velocity is conveyed by pumping line to the cement slurry feed inlet into foaming machine,
The mixing chamber that the foam prepared is conveyed into foaming machine is stirred simultaneously, the two is treated after mixing, takes the silicon mixed
Grey foam concrete measures wet density, and control wet density is in 500kg/m3~600kg/m3Between, foam volume accounts for total foam and mixes at this time
The 60%~70% of solidifying soil body product.After testing, its fluidity of foam silica-on-silicon optical waveguides being prepared is 342~348, Ke Yishi
Existing self-flowing pastefill.
5th, foam silica-on-silicon optical waveguides are poured into a mould
The foam concrete mixed is pumped into ready highway high roadbed workspace, pipeline opening and bubble by pipeline
The liquid level of foam silica-on-silicon optical waveguides is concordant, reduces contact of the foam silica-on-silicon optical waveguides with air to the greatest extent, prevents from defoaming.Treat that one makes a reservation for
Workspace cast height reach design height after, can improve pipeline opening foam silica-on-silicon optical waveguides are carried out it is whole put down, so
Stop feed afterwards, transfer pipe goes to next workspace, and the workspace poured into a mould does not have to manually be struck off.
6th, foam silica-on-silicon optical waveguides conserve
Start watering maintenance after foam silica-on-silicon optical waveguides final set, prevent foam concrete surface dehydration dry shrinkage and cracking.Summer
Ji Shi, daily watering at least 3 times；During winter, curing temperature should be controlled at 0~35 DEG C.Conserving the time limit must not be less than 10 days, can be with
It is appropriately extended by 14 days.After maintenance, intensity can reach more than 1MPa, meet the construction requirement at scene.
It is 500kg/m using wet density by the construction method of the present invention3~600kg/m3Between foam silicon ash coagulation
Soil can realize Self-leveling, while its intensity can also reach the requirement of engineering, without as current construction method, it is also necessary to people
Work goes to strike off, and saving is a large amount of artificial, while improves the efficiency poured, shortens the duration of construction.In the preparation of foam concrete
This material of silicon ash has been used in the process, not only provides new material source for highway high roadbed concrete, and can have
Improve the corrosion resistance of cementitious material in effect ground.
Claims (10)
1. a kind of construction method of silicon ash cementitious material against corrosion in highway, it is characterised in that：Include the following steps：
1) Silica fume cement slurry is prepared：In blender, first silicon ash, cement, miberal powder, flyash, gypsum and bauxite are mixed,
It is mixed again with water, obtains Silica fume cement slurry；
2) foam is prepared：In foaming machine, by concrete foamer and water mixed preparing foaming agent solution, foaming agent solution is expedited the emergence of
Foaming, obtains foam；
3) foam silica-on-silicon optical waveguides are prepared：By Silica fume cement slurry and foams mix, foam silica-on-silicon optical waveguides are obtained；
4) foam silica-on-silicon optical waveguides are poured into a mould：Foam silica-on-silicon optical waveguides are sent by pipeline to construction of the highway region, gravity flow pouring；
5) foam silica-on-silicon optical waveguides conserve：After foam silica-on-silicon optical waveguides final set, watering maintenance.
2. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 1) in, silicon ash, cement, miberal powder, flyash, gypsum and bauxite mass ratio be 1：(1.2~1.6)：(2.2~2.6)：
(2.6~3)：(0.8~1.2)：(0.15~0.25)：(0.15~0.25).
3. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 2 in highway, it is characterised in that：Step
It is rapid 1) in, the specific surface area of silicon ash is 18m2/ g~25m2/ g, the SiO of silicon ash2Content>92wt%.
4. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 1) in, the solid content of Silica fume cement slurry is 55wt%~65wt%.
5. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 2) in, the mass ratio 1 of concrete foamer and water：(18~20)；It is to expedite the emergence of foaming by air compressor to expedite the emergence of foaming, empty
The operating pressure of air compressor is 0.7MPa~0.9MPa；Expansion ratio is 18~22 times of foaming agent solution volume.
6. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 3) in, foam accounts for the 60%~70% of foam silica-on-silicon optical waveguides total volume.
7. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 3) in, the wet densities of foam silica-on-silicon optical waveguides is controlled in 500kg/m3~600kg/m3。
8. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 4) in, construction of the highway region is that construction site is separated into several pieces of construction area with template, height≤1m of template, often
Area≤400m of block construction area2。
9. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：Step
It is rapid 4) in, the outlet of pipeline is concordant with the casting area of foam silica-on-silicon optical waveguides.
10. a kind of construction method of the silicon ash cementitious material against corrosion according to claim 1 in highway, it is characterised in that：
In step 5), the time of maintenance is no less than 10 days.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508011A (en) * | 2022-01-13 | 2022-05-17 | 中国水利水电第七工程局有限公司 | Pile-supported soft soil roadbed reinforcing structure and method |
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