CN105218020B - A kind of sprayable lower shrinkage GRC decoration mortars and preparation method thereof - Google Patents
A kind of sprayable lower shrinkage GRC decoration mortars and preparation method thereof Download PDFInfo
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- CN105218020B CN105218020B CN201510592926.9A CN201510592926A CN105218020B CN 105218020 B CN105218020 B CN 105218020B CN 201510592926 A CN201510592926 A CN 201510592926A CN 105218020 B CN105218020 B CN 105218020B
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Abstract
The present invention relates to a kind of sprayable lower shrinkage GRC decoration mortars and preparation method thereof, by cement, water, sand, high activity admixture, super plasticizer sprays auxiliary agent, slurry adhesive aggregation modifying agent, and the component such as swelling agent is constituted, and is prepared through action of forced stirring.The compactness of the GRC decoration mortars is high, intensity is significantly better than traditional GRC materials, and with suitable fluidity and sag resistance energy, can uniformly jet atomization, the injection production technology of curve mold is disclosure satisfy that, the problem of solving excessively sticky traditional high-strength concrete and sagging, be difficult to injection；Component prepared by the GRC mortars also has low-shrinkage energy, the mechanical property and endurance quality of superelevation, and product is widely used in the fields such as decorating outer wall of building, building external structure, load bearing wall.
Description
Technical field
The present invention relates to a kind of GRC decoration mortars, specifically refer to the ejection-type lower shrinkage that can be used for producing high-strength GRC
High-performance decoration mortar.Products application scope includes the fields such as decorating outer wall of building, building external structure, load bearing wall.
Background technology
Glass fiber reinforced cement（GRC）It is that, using cement as binder materials matrix, alkali-resistant glass fibre is used as reinforcing material
And the new decorative material for building prepared.The physical characteristic that GRC products are protruded is fire-retardant, waterproof, insulation；And moulding, texture are rich
Richness, shaping is hardly limited by shape, is highly suitable for showing architectural image and abundant texture.The shaping side of GRC products
Method includes cutting injection, premix and sprays, pours, extruding.Wherein, to cut gunite fiber can be realized in cement slurry especially
In it is more uniform scattered, obtain higher quality GRC products, and widely used.The compression strength about 50 of traditional GRC products
~ 60MPa, thus limit GRC products skyscraper and some there is specific function to require architectural application, such as more
High anti-seismic, ant wind load requirement etc..GRC products must have higher intensity, more preferable durability and reliability, can obtain
Obtain and widely apply, these demands promote GRC products to develop to the strong GRC directions of high-strength or superelevation.
The performances such as the intensity in order to improve conventional concrete material, French Bouygue companies research and develop the nineties in last century
A kind of high-performance cement composite of success, also referred to as RPC, by optimizing grain composition, being admixed from high activity
Expect to improve consistency, reduce defect, realize strong mechanical performance.However, high performance concrete outstanding feature is to select low water
Gray scale, high activity blending doses so that slurry viscosity can not meet greatly spray technology requirement；Its flow leveling is high simultaneously, especially
It is that sagging is serious when facade sprays for complex-curved injection, influence products thickness and performance.
The content of the invention
The present invention is big for high performance concrete viscosity present in prior art, it is impossible to meet injection and early-age shrinkage is tight
The problems such as weight, there is provided a kind of sprayable lower shrinkage GRC decoration mortars, can meet spray technology, can produce high-strength GRC products.
The sprayable lower shrinkage GRC decoration mortars, are formulated by the component of following mass parts：
100 parts of cement,
20 ~ 50 parts of water,
60 ~ 250 parts of sand,
10 ~ 70 parts of high activity admixture,
1 ~ 6 part of super plasticizer,
1 ~ 8 part of auxiliary agent is sprayed,
0.01 ~ 0.05 part of slurry adhesive aggregation modifying agent,
1 ~ 10 part of swelling agent.
Described cement is the white portland cement, Portland cement or sulphur aluminic acid that strength grade is not less than 42.5
Salt cement.
Described sand particle size range is 0.075 ~ 1.5 mm, continuous grading.
Described super plasticizer is one or both of powder or efficient liquid polycarboxylate water-reducer；Efficient liquid gathers
Carboxylic acid water reducer solid content is more than 30%, and water-reducing rate is more than 30%.
Described swelling agent is any one or more in magnesia, calcium oxide expansion agents.
Described high activity admixture is metakaolin by weight ratio：Ultra-fine SILICA FUME：Ultrafine slag：Nano-meter SiO_22
= 1 : (0.2~3) : (0.2~1) :The mixed powder of (0.05 ~ 0.2), through 600 ~ 800 DEG C of high temperature multiplicity reactivations or through height
It mechanical can be combined and obtain.
Described injection auxiliary agent is any one in acrylic emulsion or flow enhuancement type redispersable latex powder.
Described slurry adhesive aggregation modifying agent is magnesium aluminum silicates cement thixotropic lubricant.
The sprayable lower shrinkage GRC decoration mortars are prepared by following steps：
(1) cement, sand, high activity admixture, slurry adhesive aggregation modifying agent and swelling agent are placed in forced stirrer by proportioning
Interior, progress, which is premixed, obtains uniform dry mash；And super plasticizer, injection auxiliary agent are dispersed in water and form solution；
(2) the 70% of the solution is added and is stirred into dry blend, after after slurry liquefaction, will remained by spray-on process
30% solution of remaininging uniformly is sprayed to the slurry surface in mixer, then is sufficiently stirred, so as to obtain sprayable lower shrinkage
GRC decoration mortars.
The application of the sprayable lower shrinkage GRC decoration mortars：
GRC decoration mortars in above-mentioned mixer are sprayed in pump truck by screw delivery pump Automatic Conveying to GRC；GRC
Spray pump truck and connect special binary channels spray gun progress injection production, described binary channels spray gun is in nozzle increase rotary pneumatic circulation
Road, strengthens the atomization uniformity to mortar.
Beneficial effect：
Design principle of the present invention according to high performance concrete, for the toughness and sagging of high performance concrete slurry
Property, cooperateed with and optimized by material system composition and ratio, on the basis of high activity admixture performance is made full use of, helped by injection
Agent and modifying agent adjust the jet flow characteristic and adhesive aggregation characteristic of slurry, realize the sprayable performance of high performance concrete, and
It is successfully applied in GRC.The contraction of mortar is compensated by swelling agent simultaneously, the contraction deformation of GRC decoration mortars is reduced, dropped
The risk that the defect such as low cracking and cracking is produced.Due to using spray technology, reduce high performance concrete system and there is gas
The defects such as bubble so that the pressure resistance under the GRC component normal temperature curing conditions of preparation reaches more than 100MPa, rupture strength reaches 20MPa
More than；Mechanical property and endurance quality with superelevation.
Embodiment
The further instruction present invention, but be not limited to following examples, described sprayable low receipts with reference to embodiments
The high-strength GRC decoration mortars composition and ratio table 1 that contracts is as described below：
Embodiment 1 ~ 5
(1) by being matched cement, sand, high activity admixture, magnesium aluminum silicates cement thixotropic lubricant and expansion in upper table
Agent is placed in forced stirrer, and progress, which is premixed, obtains uniform dry mash；And super plasticizer, injection auxiliary agent are dispersed in water
Middle formation solution；
(2) the 70% of the solution is added and is stirred into dry blend, after after slurry liquefaction, will remained by spray-on process
30% solution of remaininging uniformly is sprayed to the slurry surface in mixer, then is sufficiently stirred, so as to obtain sprayable lower shrinkage
GRC decoration mortars.
The performance parameter such as table 2 below of the GRC decoration mortars of the embodiment of the present application 1 ~ 5, is surveyed according to European standard EN1170-1
Try the slump of slurry：
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| 28d compression strength（Mpa） | 130 | 118 | 125 | 134 | 110 |
| 28d rupture strengths（Mpa） | 26.6 | 22.3 | 23.5 | 27.1 | 21.2 |
| The slump（Ring） | 5 | 6 | 5 | 5 | 6 |
As seen from the above table, pressure resistance of the sprayable lower shrinkage GRC decoration mortars of the application under normal temperature curing condition reaches
More than 100MPa, rupture strength reaches more than 20MPa, the ring of the slurry slump 5 ~ 6, mechanical property, endurance quality with superelevation and
Good jet performance.
Claims (7)
1. a kind of sprayable lower shrinkage GRC decoration mortars, it is characterised in that：It is formulated by the component of following mass parts：
100 parts of cement,
20 ~ 50 parts of water,
60 ~ 250 parts of sand,
10 ~ 70 parts of high activity admixture,
1 ~ 6 part of super plasticizer,
1 ~ 8 part of auxiliary agent is sprayed,
0.01 ~ 0.05 part of slurry adhesive aggregation modifying agent,
1 ~ 10 part of swelling agent；
The high activity admixture is metakaolin by weight ratio：Ultra-fine SILICA FUME：Ultrafine slag：Nano-meter SiO_22 = 1 :
(0.2~3) : (0.2~1) :The mixed powder of (0.05 ~ 0.2) is through 600 ~ 800 DEG C of high temperature multiplicity reactivations or through high energy mechanical
It is compound to obtain；
The injection auxiliary agent is acrylic emulsion or flow enhuancement type redispersable latex powder, and the slurry adhesive aggregation modifying agent is silicon
Sour magnesia-alumina cement thixotropic lubricant.
2. sprayable lower shrinkage GRC decoration mortars according to claim 1, it is characterised in that the cement is intensity etc.
Level is not less than 42.5 white portland cement, Portland cement or sulphate aluminium cement.
3. sprayable lower shrinkage GRC decoration mortars according to claim 1, it is characterised in that the particle size range of the sand
For 0.075 ~ 1.5 mm, continuous grading.
4. sprayable lower shrinkage GRC decoration mortars according to claim 1, it is characterised in that the super plasticizer is powder
One or both of body or efficient liquid polycarboxylate water-reducer, the solid content of wherein efficient liquid polycarboxylate water-reducer are more than
30%, water-reducing rate is more than 30%.
5. sprayable lower shrinkage GRC decoration mortars according to claim 1, it is characterised in that described swelling agent is oxygen
Change any one or more in magnesium, calcium oxide expansion agents.
6. the preparation method of the sprayable lower shrinkage GRC decoration mortars described in claim any one of 1-5, it is characterised in that：
(1) cement, sand, high activity admixture, slurry adhesive aggregation modifying agent and swelling agent are placed in forced stirrer by proportioning,
Progress, which is premixed, obtains uniform dry blend；And super plasticizer, injection auxiliary agent are dispersed in water and form solution；
(2) the 70% of the solution is added and is stirred into dry blend, after after slurry liquefaction, by spray-on process by residue
30% solution is uniformly sprayed to the slurry surface in mixer, then is sufficiently stirred, so as to obtain sprayable lower shrinkage
GRC decoration mortars.
7. the application of the sprayable lower shrinkage GRC decoration mortars described in claim any one of 1-5, it is characterised in that：Mixer
Interior GRC decoration mortars are sprayed in pump truck by screw delivery pump Automatic Conveying to GRC；GRC injection pump truck connections are special double
Passage spray gun carries out injection production, and described binary channels spray gun increases swirling eddy passage in nozzle, strengthens the mist to mortar
Change the uniformity.
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| CN107555913A (en) * | 2017-07-18 | 2018-01-09 | 河北卓达建材研究院有限公司 | A kind of string slurry sprayed suitable for GRC and preparation method thereof |
| CN108585675B (en) * | 2018-05-09 | 2021-07-27 | 中建商品混凝土有限公司 | Pattern concrete and preparation method thereof |
| CN108609954B (en) * | 2018-05-21 | 2020-07-31 | 水利部交通运输部国家能源局南京水利科学研究院 | Low-viscosity anti-cracking high-strength wet-sprayed concrete and preparation method thereof |
| CN108911648B (en) * | 2018-07-02 | 2022-02-11 | 江苏苏博特新材料股份有限公司 | Sprayable early-strength type ultrahigh-toughness mortar concrete system and preparation method thereof |
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| CN111574103A (en) * | 2020-05-08 | 2020-08-25 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Multi-component composite synergist for sprayed concrete and preparation method thereof |
| CN113716915B (en) * | 2021-08-19 | 2022-09-09 | 华新超可隆新型建材科技(黄石)有限公司 | Sprayed ultrahigh-performance concrete for corrosion prevention and reinforcement |
| CN114105516B (en) * | 2021-11-17 | 2023-02-10 | 贵州天威建材科技有限责任公司 | Sprayed concrete viscosity modifier and preparation method thereof |
| CN113979696A (en) * | 2021-11-24 | 2022-01-28 | 镇江建科建设科技有限公司 | Formula and production process of glass fiber reinforced precast concrete member |
| CN114150877A (en) * | 2021-12-08 | 2022-03-08 | 湖南人健宝固高新科技发展有限公司 | Construction method of ultra-high performance concrete |
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| CN102180621A (en) * | 2011-02-28 | 2011-09-14 | 山西省交通科学研究院 | Polymer modified dry-mixed bonding mortar for bridge reinforcement as well as preparation and construction methods thereof |
| CN102518275A (en) * | 2011-12-20 | 2012-06-27 | 南京倍立达实业有限公司 | Nano self-cleaning fiber reinforced cement product and production method for same |
| CN102718447B (en) * | 2012-04-11 | 2015-01-14 | 陈明中 | High-performance reinforced mortar suitable for thick-layer spraying and preparation method thereof |
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Effective date of registration: 20230810 Address after: Floor 3, Building B6, No. 9, Bailongjiang East Street, Jianye District, Nanjing City, Jiangsu Province, 210000 Patentee after: Jiangsu Beilida New Material Technology Co.,Ltd. Address before: 210012 Tuqiao Town Hua District, Jiangning District, Nanjing City, Jiangsu Province Patentee before: NANJING BEILIDA NEW MATERIAL SYSTEM ENGINEERING Co.,Ltd. |