CN109648695A - A kind of silicon rubber template and preparation method thereof and the method for preparing super-hydrophobic concrete using the template - Google Patents
A kind of silicon rubber template and preparation method thereof and the method for preparing super-hydrophobic concrete using the template Download PDFInfo
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- CN109648695A CN109648695A CN201811452587.4A CN201811452587A CN109648695A CN 109648695 A CN109648695 A CN 109648695A CN 201811452587 A CN201811452587 A CN 201811452587A CN 109648695 A CN109648695 A CN 109648695A
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- silicon rubber
- concrete
- cement
- template
- hydrophobic
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 81
- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000004568 cement Substances 0.000 claims abstract description 58
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011398 Portland cement Substances 0.000 claims abstract description 35
- 239000000741 silica gel Substances 0.000 claims abstract description 25
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 25
- 239000004576 sand Substances 0.000 claims abstract description 22
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 8
- 229920000260 silastic Polymers 0.000 claims abstract description 5
- 150000004645 aluminates Chemical class 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000004411 aluminium Substances 0.000 claims description 8
- 230000015271 coagulation Effects 0.000 claims description 7
- 238000005345 coagulation Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 6
- 239000002243 precursor Substances 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 4
- 239000005060 rubber Substances 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000002209 hydrophobic effect Effects 0.000 abstract description 7
- 238000005266 casting Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 11
- 239000002994 raw material Substances 0.000 description 9
- 239000002689 soil Substances 0.000 description 7
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 6
- 229910000077 silane Inorganic materials 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- RCJVRSBWZCNNQT-UHFFFAOYSA-N dichloridooxygen Chemical compound ClOCl RCJVRSBWZCNNQT-UHFFFAOYSA-N 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 235000010894 Artemisia argyi Nutrition 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 244000030166 artemisia Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/12—Spreading-out the material on a substrate, e.g. on the surface of a liquid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the hydrophobic modified technical field of concrete surface, the method that is related to a kind of silicon rubber template and preparation method thereof and prepares super-hydrophobic concrete using the template.The preparation of silicon rubber template includes: that (1) pours into Portland cement paste in silica gel mould, and Portland cement concrete (PCC) sample is obtained after demoulding and maintenance；(2) it is substrate by sample lower surface, silicon rubber is formed a film in substrate surface using solution casting method, silastic material is opened after film is solidified, is silicon rubber template with concrete contact surface.Super-hydrophobic concrete preparation: cement, normal sand are uniformly mixed with water, poured into silica gel mould, is tipped upside down in above-mentioned silicon rubber template, up to super-hydrophobic concrete sample after maintenance.The utility model has the advantages that super-hydrophobic concrete prepared by the present invention and silicon rubber template contact surface are to water droplet contact angle>150 °, roll angle<10 ° have super-hydrophobicity；Gained silicon rubber template is applicable in various cement concrete, and can Reusability.
Description
Technical field
The invention belongs to the hydrophobic modified technical field of concrete surface, be related to a kind of silicon rubber template and preparation method thereof and
The method for preparing super-hydrophobic concrete using the template.
Background technique
Cement and its concrete product are (airport, bridge pier, over strait in substrate construction (building, road, bridge) and critical facility
Bridge, nuclear power station, oil well) construction field dosage is very big.The generally existing water imbibition of cement concrete material is big, is easy to be corroded
Property the water-related destruction and erosion such as seawater, Lake Water, acid rain, frost hydrophobic change therefore is carried out to concrete product surface
Property, the water resistance for improving concrete product is conducive to improve the durability of concrete product.Currently, hating to cement concrete
The modified method of water mainly carries out hydrophobic treatment, these silanes by adding silane or silicon fluoride in concrete mix
Chemical treatments are capable of forming super-hydrophobic waterproof protective layer in cement mixing, solidification process, prevent water from entering coagulating cement
In the gap of soil.Patent document 201611030438X discloses modified using silane, silicon fluoride or fluoro-acrylate copolymer
The method of portland cement, the method use silane or fluorine-containing object, and it is only effective to portland cement.Patent document
Mold silica gel and silica gel curing agent are applied to coated abrasive surface by 2018100461311, are obtained after dry with sand paper cavity block structure
Silica gel pattern mould；Then magnesia oxychloride cement slurry is poured in the silica gel pattern mould mold being set, is had after molding, maintenance
The magnesia oxychloride cement of super hydrophobic surface, but for ordinary portland cement, the surface contact angle that same procedure obtains is only
20 °, be water-wetted surface.Patent document application number 2018101395035 prepares super-hydrophobic cement fine sand mixture first, then will
It puts into the aqueous solution containing surfactant, dispersing agent and silicon fluoride, through mechanical stirring, forms super-hydrophobic cement, equally,
This method is added to hydrophobic modifier silane in cement complex, it will reduces the intensity of concrete.In short, these method institutes
The silane and silicon fluoride used is expensive, and toxicity is big；More importantly institute's shape can be reduced after silane is added in mixing and stirring material
At concrete compression strength, be unfavorable for the use of concrete.Since cement concrete is many kinds of, dosage is very big, in reality
It is badly in need of developing general, simple and low-cost cement concrete method for preparing super-hydrophobic surface in the application of border.
Summary of the invention
In order to solve, expensive raw material price existing in the prior art, preparation method applicability is poor and durability is poor
Deficiency prepares super-hydrophobic coagulation the purpose of the present invention is to provide a kind of silicon rubber template and preparation method thereof and using the template
The method of soil, technical solution are realized in accordance with the following steps:
A kind of preparation method of silicon rubber template, includes the following steps:
(1) portland cement, normal sand are mixed with water, stirs evenly to form slurry；Slurry is then poured into Silicon moulds
It in tool, is demoulded after overnight, maintenance, obtains ordinary portland cement concrete sample, lower surface is and silica gel mould contacts table
Face；
(2) each component of silicon rubber is uniformly mixed, obtains silicon rubber precursor solution；By above-mentioned ordinary portland cement
Concrete lower surface is horizontal positioned and is used as substrate upward；Silicon rubber precursor solution is poured on aforesaid substrate, froth in vacuum
After solidified, it is cooling, open silastic material, being in contact with substrate surface is silicon rubber template.
Preferably, the charge ratio of portland cement, normal sand and water is 100:100:45 by weight in step (1).
Preferably, rubber mold described in step (1) is pros' mould made of the common silica gel of market purchase, internal
Cavity size is 20cm × 20cm × 5cm；The condition of the maintenance is to conserve 28 days in standard curing box；The common silicic acid
Salt cement concrete sample shape is 20cm × 20cm × 1cm size square plate.
Preferably, silicon rubber described in step (2) is 184 type two-component silicone rubbers of Dow Corning Corporation, wherein double groups
Part it is component A condensate and B component crosslinking agent, mixes component A condensate and B component crosslinking agent by weight 10:1 when use
Uniformly.
Preferably, solidification described in step (2) is specially first to solidify at room temperature for 24 hours, then solidifies 2h at 80 DEG C.
A method of super-hydrophobic concrete is prepared using silicon rubber template are as follows:
Cement, normal sand are uniformly mixed with water, pours and is filled in silica gel mould, be buckled to silica gel mould after jolt ramming
In above-mentioned silicon rubber template, demoulding；Concrete sample after demoulding obtains super-hydrophobic concrete sample after maintenance.
Preferably, the cement is portland cement, aluminate cement or sulphate aluminium cement；Wherein cement, standard
The weight ratio of sand and water is 100:100:30~45.
Preferably, the maintenance is to conserve 28 days in standard curing box, and the silica gel mould and silicon for keeping being buckled to are needed before demoulding
Rubber form contacts for 24 hours.
The utility model has the advantages that
(1) in the method for preparing silicon rubber template, ordinary portland cement solidifies together with silicon rubber template, so that silicon rubber
Glue surface can become coarse, and when silastic surface is together with concrete locking below, this coarse structure can be conducive to cement
It is rougher, increase the super-hydrophobicity of concrete surface.
(2) it prepares in super-hydrophobic concrete, silicon rubber template after a period of time, makes together with concrete locking
Some low molecular weight hydrophobic components in silicon rubber penetrate into concrete surface, carry out hydrophobic modification to concrete surface, so that
Concrete surface has hydrophobicity；In addition concrete surface itself has coarse microstructure, and coarse structure is further strengthened
The hydrophobicity of concrete surface, therefore, concrete solidify rear surface with super-hydrophobicity in silicon rubber template.
(3) this method preparation silicon rubber template applicability it is wide, can using with ordinary portland cement, aluminate cement and
Sulphate aluminium cement, and the silicon rubber template repeatability is stronger, reusable 10 times or more.
(4) preparation method of the present invention and cement concrete preparation process are fully synchronized, super-hydrophobic after concrete coagulation solidification
Surface is formed simultaneously, therefore practical.
(5) silicon rubber mould board raw material of the present invention is cheap, and safe and non-toxic, preparation method is simple, there is preferable application prospect.
Detailed description of the invention
Fig. 1 is Portland cement concrete (PCC) sample contact angle test photo obtained in the embodiment of the present invention 1；
Fig. 2 is that Portland cement concrete (PCC) sample roll angle obtained in the embodiment of the present invention 1 tests photo.
Specific embodiment
The present invention is described in further detail for following example and attached drawing.
Embodiment 1
Silicon rubber template is prepared first: using strength grade for the conch board ordinary portland cement of 42.5MPa, Xiamen Chinese mugwort
The cement testing sand and local tap water that Si Ou normal sand Co., Ltd provides are as raw material.According to 100 weight of cement
Part, 100 parts by weight of normal sand, the ratio of 45 parts by weight of water mixes above-mentioned ordinary portland cement, normal sand with water, stirs
It is formed uniformly slurry；Then by slurry pour into internal cavities having a size of 20cm × 20cm × 5cm made of common silica gel just
In cube shape mold, demoulded after overnight.It is obtained after coagulating cement soil sample after demoulding is conserved 28 days in standard curing box
The lamellar ordinary portland cement concrete sample of 20cm × 20cm × 1cm size square, lower surface are and Silicon moulds
Has contact surface.The 184 type silicon rubber component As and B component of Dow Corning Corporation are uniformly mixed according to weight ratio 10:1, before obtaining
Drive liquid solution；Concrete lower surface is horizontally arranged and is used as substrate upward；The precursor solution is poured on aforesaid substrate, very
Solidify at room temperature after empty de-bubble 24 hours, then solidifies 2 hours at 80 DEG C.Silastic material is opened after being cooled to room temperature,
It is silicon rubber template with concrete contact surface.
Then super-hydrophobic Portland cement concrete (PCC) is prepared using silicon rubber template: using strength grade for 42.5MPa's
Conch board ordinary portland cement, the cement testing sand that Xiamen Aisiou Standard Sand Co., Ltd provides and locality are originally
Water is as raw material.100 parts by weight ordinary portland cement coagulation local soil types are become into cement, 100 parts by weight normal sands and 45 weight
Part water is uniformly mixed, and is then cast in silica gel mould, full of the silicon rubber that mold is tipped upside down on to above-mentioned preparation after mold and jolt ramming
On glue pattern plate, template is removed after 24 hours and is demoulded；Super-hydrophobic coagulation soil sample is obtained after conserving 28d in standard curing box
Product.Such as Fig. 1, gained super-hydrophobic silicon hydrochlorate concrete sample is to the contact angle of water droplet with silicon rubber template institute's contact surface
153.2°；Such as Fig. 2, roll angle is 7.8 °, illustrates that the super-hydrophobic concrete of this method preparation has preferable super-hydrophobicity.
Embodiment 2
Silicon rubber template is prepared first: same as Example 1.
Then Super-hydrophobic aluminium acid salt cement concrete is prepared using silicon rubber template: using and praise the aluminate cement of resistance to A700,
The cement testing sand and local tap water that Xiamen Aisiou Standard Sand Co., Ltd provides are as raw material.By 100 weight
Part aluminate cement, 100 parts by weight normal sands and 30 parts by weight water are uniformly mixed, and are then cast in silica gel mould, and mould is full of
Have and tip upside down on mold in the silicon rubber template of above-mentioned preparation after jolt ramming, template is removed after 24 hours and is demoulded；It is supported in standard
Super-hydrophobic concrete sample is obtained after conserving 28d in protecting box, with silicon rubber template institute's contact surface to the contact angle of water droplet
It is 152.3 °, roll angle is 6.7 °.
Embodiment 3
Silicon rubber template is prepared first: same as Example 1.
Then super-hydrophobic sulphate aluminium cement concrete is prepared using silicon rubber template: Double Fast sulphur is pacified using Shun
Aluminate cement, the cement testing sand and local tap water that Xiamen Aisiou Standard Sand Co., Ltd provides are as former
Material.By 100 parts by weight aluminate cements, 100 parts by weight normal sands and 30 parts by weight water are uniformly mixed, and are then cast in Silicon moulds
In tool, full of tipping upside down on mold in the silicon rubber template of above-mentioned preparation after mold and jolt ramming, template is removed after 24 hours and is taken off
Mould；Super-hydrophobic concrete sample is obtained after conserving 28d in standard curing box, with silicon rubber template institute contact surface to water
The contact angle of drop is 153.7 °, and roll angle is 8.6 °.
Embodiment 4
Using primary silicon rubber template used in embodiment 1.
Then super-hydrophobic Portland cement concrete (PCC) is prepared using silicon rubber template: using strength grade for 42.5MPa's
Conch board ordinary portland cement, the cement testing sand that Xiamen Aisiou Standard Sand Co., Ltd provides and locality are originally
Water is as raw material.By 100 parts by weight ordinary portland cements, 100 parts by weight normal sands and 45 parts by weight water are uniformly mixed, then
It is cast in silica gel mould, full of tipping upside down on mold in above-mentioned used primary silicon rubber template after mold and jolt ramming, 24 is small
When after remove template and demould；Super-hydrophobic concrete sample is obtained after conserving 28d in standard curing box, with silicon rubber mould
Plate institute's contact surface is 153.1 ° to the contact angle of water droplet, and roll angle is 8.3 °.
Embodiment 5
Using secondary silicon rubber template used in embodiment 4.
Then super-hydrophobic Portland cement concrete (PCC) is prepared using silicon rubber template: using strength grade for 42.5MPa's
Conch board ordinary portland cement, the cement testing sand that Xiamen Aisiou Standard Sand Co., Ltd provides and locality are originally
Water is as raw material.By 100 parts by weight ordinary portland cements, 100 parts by weight normal sands and 45 parts by weight water are uniformly mixed, then
It is cast in silica gel mould, full of tipping upside down on mold in above-mentioned used secondary silicon rubber template after mold and jolt ramming, 24 is small
When after remove template and demould；Super-hydrophobic concrete sample is obtained after conserving 28d in standard curing box, with silicon rubber mould
Plate institute's contact surface is 154.2 ° to the contact angle of water droplet, and roll angle is 7.5 °.
Embodiment 6
Using silicon rubber template three times used in embodiment 5.
Then super-hydrophobic Portland cement concrete (PCC) is prepared using silicon rubber template: using strength grade for 42.5MPa's
Conch board ordinary portland cement, the cement testing sand that Xiamen Aisiou Standard Sand Co., Ltd provides and locality are originally
Water is as raw material.By 100 parts by weight ordinary portland cements, 100 parts by weight normal sands and 45 parts by weight water are uniformly mixed, then
It is cast in silica gel mould, full of tipping upside down on mold in above-mentioned used silicon rubber template three times after mold and jolt ramming, 24 is small
When after remove template and demould；Super-hydrophobic concrete sample is obtained after conserving 28d in standard curing box, with silicon rubber mould
Plate institute's contact surface is 152.9 ° to the contact angle of water droplet, and roll angle is 6.4 °.
Embodiment 7
Using used four times in embodiment 6 silicon rubber templates.
Then Super-hydrophobic aluminium acid salt cement concrete is prepared using silicon rubber template: using and praise the aluminate cement of resistance to A700,
The cement testing sand and local tap water that Xiamen Aisiou Standard Sand Co., Ltd provides are as raw material.By 100 weight
Part aluminate cement, 100 parts by weight normal sands and 30 parts by weight water are uniformly mixed, and are then cast in silica gel mould, and mould is full of
Have and tip upside down on mold in above-mentioned used four times silicon rubber templates after jolt ramming, template is removed after 24 hours and is demoulded；It is marking
Super-hydrophobic concrete sample is obtained after conserving 28d in quasi- curing box, water droplet is connect with silicon rubber template institute contact surface
Feeler is 154.3 °, and roll angle is 6.2 °.
Embodiment 8
Using used five times in embodiment 7 silicon rubber templates.
Then super-hydrophobic sulphate aluminium cement concrete is prepared using silicon rubber template: Double Fast sulphur is pacified using Shun
Aluminate cement, the cement testing sand and local tap water that Xiamen Aisiou Standard Sand Co., Ltd provides are as former
Material.Aluminate cement coagulation local soil type becomes 100 parts by weight of cement, 100 parts by weight of normal sand, 30 parts by weight of water.It will centainly match
Concrete each component be uniformly mixed with water, be then cast in silica gel mould, tipped upside down on full of mold and after jolt ramming by mold
In above-mentioned used five silicon rubber templates, template is removed after 24 hours and is demoulded；It is obtained after conserving 28d in standard curing box
Super-hydrophobic concrete sample is 153.7 ° with contact angle of the silicon rubber template institute's contact surface to water droplet, and roll angle is 8.6 °.
By Examples 1 to 3 result it is found that applicability of the present invention is extensive, ordinary portland cement, aluminate cement can be applied
With the various cements kind such as sulphate aluminium cement.
By 4~8 result of embodiment it is found that silicon rubber template of the invention can repeatedly use, experiments verify that, weight
It uses 10 times or more again, its hydrophobicity can be kept simultaneously.
Claims (9)
1. a kind of preparation method of silicon rubber template, which comprises the steps of:
(1) portland cement, normal sand are mixed with water, stirs evenly to form slurry；Then slurry is poured into silica gel mould,
Demoulding after overnight, maintenance obtain ordinary portland cement concrete sample, and lower surface is and silica gel mould contact surface；
(2) each component of silicon rubber is uniformly mixed, obtains silicon rubber precursor solution；By above-mentioned ordinary portland cement coagulation
Native lower surface is horizontal positioned and is used as substrate upward；Silicon rubber precursor solution is poured on aforesaid substrate, froth in vacuum is laggard
Row solidification, it is cooling, silastic material is opened, being in contact with substrate surface is silicon rubber template.
2. a kind of preparation method of silicon rubber template according to claim 1, which is characterized in that silicate in step (1)
The charge ratio of cement, normal sand and water is 100:100:45 by weight.
3. a kind of preparation method of silicon rubber template according to claim 1, which is characterized in that rubber described in step (1)
Sealing rubber die is pros' mould made of the common silica gel of market purchase；The condition of the maintenance is to conserve in standard curing box
28 days；The ordinary portland cement concrete sample shape is square plate.
4. a kind of preparation method of silicon rubber template according to claim 1, which is characterized in that described in step (2)
Silicon rubber is 184 type two-component silicone rubbers of Dow Corning Corporation, and wherein two-component is component A condensate and B component crosslinking agent, is made
Component A condensate and B component crosslinking agent are uniformly mixed by the used time by weight 10:1.
5. a kind of preparation method of silicon rubber template according to claim 1, which is characterized in that solid described in step (2)
Changing is specially first to solidify at room temperature for 24 hours, then solidifies 2h at 80 DEG C.
6. the silicon rubber template of described in any item method preparations according to claim 1~5.
7. a kind of method for preparing super-hydrophobic concrete using silicon rubber template as claimed in claim 6, it is characterised in that:
Cement, normal sand are uniformly mixed with water, pours and is filled in silica gel mould, tip upside down on silica gel mould after jolt ramming
It states in silicon rubber template, demoulds；Concrete sample after demoulding obtains super-hydrophobic concrete sample after maintenance.
8. a kind of method for preparing super-hydrophobic concrete using silicon rubber template according to claim 7, which is characterized in that
The cement is portland cement, aluminate cement or sulphate aluminium cement；Wherein the weight ratio of cement, normal sand and water is
100:100:30~45.
9. a kind of method for preparing super-hydrophobic concrete using silicon rubber template according to claim 7, which is characterized in that
The maintenance is to conserve 28 days in standard curing box, and the silica gel mould for keeping being buckled to and silicon rubber template contacts are needed before demoulding for 24 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452587.4A CN109648695B (en) | 2018-11-30 | 2018-11-30 | Silicone rubber template, preparation method thereof and method for preparing super-hydrophobic concrete by using template |
Applications Claiming Priority (1)
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| CN113387640A (en) * | 2021-06-02 | 2021-09-14 | 南昌航空大学 | Integral super-hydrophobic portland cement foam concrete product and preparation method thereof |
| CN114347320A (en) * | 2022-01-06 | 2022-04-15 | 中国建筑科学研究院有限公司 | Preparation method of silicone rubber mold for resin casting body colloid performance test |
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