CN1594194A - Fiber-reinforced polymer modified crack resistant mortar - Google Patents
Fiber-reinforced polymer modified crack resistant mortar Download PDFInfo
- Publication number
- CN1594194A CN1594194A CNA2004100134765A CN200410013476A CN1594194A CN 1594194 A CN1594194 A CN 1594194A CN A2004100134765 A CNA2004100134765 A CN A2004100134765A CN 200410013476 A CN200410013476 A CN 200410013476A CN 1594194 A CN1594194 A CN 1594194A
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- fiber
- reinforced polymer
- mortar
- anticracking grout
- cement
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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 invention provides a fiber-reinforced polymer modified crack resistant mortar, which is prepared by coating resilient water-proof maintenance liquid onto a mortar layer comprising cement, sand, inorganic ore powder, alkali resistant fiber, volume stabilizing agent, polymer modifier, the maintenance liquid penetrates into the capillary openings of the mortar layer, thus forming new crack resisting layer.
Description
One, technical field
The invention belongs to the special cracking resistant mortar of building heat preservation heat insulation wall, be specifically related to a kind of fiber-reinforced polymer modification anticracking grout.
Two, background technology
Along with going deep into of work applied in the innovation and the energy saving building of national materials for wall, many defectives that the tradition mortar is exposed, as problem such as cause the body of wall seepage because of metope hollowing, ftracture, come off etc., let in air, peel off, more and more outstanding in construction work, have a strong impact on construction quality and normal the use, also restricted applying of heat preserving and insulating material.Great mass of data shows, causes the major cause of these problems, except the structural cracks that uneven settlement of foundation etc. causes, mainly can reduce following two aspects: the one, walling self water-intake rate height, shrink big; The 2nd, used water retentivity of mortar is poor, shrinkage strain is big, cohesive strength is low, weather-proof splitting resistance difference and mate unreasonable etc.And existing anticracking grout is not owing to the time take into full account the contraction of material itself in design, thereby need add reinforcement material again to strengthen its anti-cracking function after the mortar moulding, causes the construction technology complexity, is unfavorable for promoting the use of of material.
Three, summary of the invention
Technical problem to be solved by this invention is infitration type elastic water-proof curing fluid capable is applied on the screed of being made up of cement, sand, inorganic mineral powder, alkali proof fiber, volume stabilizer, polymer modifiers and forms fiber-reinforced polymer modification anticracking grout.
Technical scheme of the present invention is:
A kind of fiber-reinforced polymer modification anticracking grout, its component and content (weight) are: 1 part of cracking resistance rubber powder, 2～2.5 parts of cement, 10～12 parts in sand, 2～2.5 parts in water; Wherein: the component of cracking resistance rubber powder and content (weight) are: inorganic mineral powder 20～50%, alkali proof fiber 0.1～4%, volume stabilizer 25～40%, polymer modifiers 20～45%, described cement is ordinary Portland cement, aluminosulfate cement, a kind of in the Portland blast.Described alkali proof fiber is a polypropylene fibre, alkali resistant glass fiber, nylon fiber, one or more in the animal and plant fiber compound.Described volume stabilizer is that the air entrapment agent of swelling agent and anionic is composited according to weight ratio at 5000: 1.Described polymer modifiers is one or more the combination in carboxymethyl cellulose, carboxy-propyl cellulose, hydroxyl first class Mierocrystalline cellulose, hydroxypropylcellulose, vinyl acetate between to for plastic dry powder, the polyethylene dry powder.The top layer has been coated with that layer infitration type waterproof curing fluid capable---the waterproof curing fluid capable is a kind of organic elastomer coating of oleic series.
Beneficial effect of the present invention
This anticracking grout has not only solved ordinary mortar because the cracking problem that thermal stress, structural stress and string stress etc. cause; And have characteristics such as water conservation slow setting, elastomeric modification, stress dispersion, material compensation, water-proof climate resisting simultaneously.Its mechanism that tells on is:
A. alkali proof fiber cracking resistance enhanced mechanism
It mainly is by physically modified its internal structure to be changed that fiber improves mortar performance.Itself does not react with other raw materials, so with mortar good affinity is arranged, can mix with other raw materials rapidly, and distribution extremely evenly, thoroughly.Observe by electron microscopic study, in mortar, form a kind of even unrest, structural stress is disperseed, thereby produce effective secondary stiffening effect to the network system that distributes.
Effect of contraction for crack generation and development, the linear elasticity theory of mechanics is thought: in the inner defective that originally just exists of mortar, desire improves intensity, must reduce the degree of defective as much as possible, improve toughness, reduce the stress concentration factor of internal fissure end, its cracking resistance effect depends primarily on the average headway of fiber.Fiber is made three-dimensional random average headway to distribution and be can be represented by the formula in structure:
In the formula, the mean distance of S---fibrillar center; D, V
f---be respectively the diameter and the volume fraction of fiber.
Theoretical and when experiment showed, that average between centers when fiber is less than 7.6mm, its tension, bending resistance first crack strength are improved.
The unrest of fiber has weakened the string stress of mortar greatly to distributing.Shrink energy and be dispersed on the fiber yarn that has the high strength low elastic modulus in the mortar, fiber absorbs portion of energy, greatly improve its snappiness, suppressed the generation and the development of microscopic checks, reach the purpose of fibre crack-resistance.The introducing of fiber simultaneously can be alleviated the effect of the mortar internal stress that temperature variation causes, stops the expansion of microfracture, therefore has the effect of temperature difference compensation cracking resistance.
Fibre-reinforced anti-crack mortar not only has good resistance to cleavage, and its impervious water resistance, shock resistance all obviously are better than ordinary mortar.
B. material compensation contractile mechanism
For reaching early stage zero purpose of shrinking of anticracking grout, according to the materialogy principle, the volume stabilizer of introducing in raw material is owing to generate a large amount of swelling property crystal after aquation, increased the crystalline content in the mortar, fill or stopped up the pore seam, porosity descends greatly, produces volumetric expansion, produce stress and compressive strain in the body, compensated all kinds of shrinkage strains, offset or partial offset corresponding tensile stress, thereby improved whole splitting resistance.
Air entrapment agent has reduced the surface tension and the surface energy of water in the mortar simultaneously, in mortar mixture whipping process, produce the bubble of not vanishing small in a large number, high dispersing, amount of air entrainment reaches about 5%, the surface-area of whole state is increased, viscosity improves, be full of cracks, hollowing, peel off and bleeding and laminated segregation phenomenon be improved significantly.
Test shows that the mortar after passing through fiber reinforcement and material compensation is handled is compared with ordinary mortar, and the average shrinkage value is reduced to 2/0,000 by 6/0,000, on average reduces by 66.7%; Ordinary mortar begins to occur crackle in various degree in 7 days behind last wall, and mortar still flawless generation after behind the last wall 90 days of handling through modification.
C. polymer modification mechanism
Big, the poor water retention property of tradition mortar bleeding quantity, easy laminated segregation, when spreading upon on the heat-preserving heat-insulating wall surface, because the water-intake rate height of heat-preserving heat-insulating wall, serious phenomenon of losing water will take place in mortar, not only can influence the normal sclerosis of mortar, but also can weaken the cohesive force of mortar and bottom surface, reduce masonry strength and splitting resistance, phenomenon such as cause the metope hollowing, ftracture, come off.
Fiber-reinforced polymer anticracking grout provided by the invention, because polymer modifiers belongs to powder body material, and specific surface area is quite big, can evenly be filled in the mortar hole, so the mortar porosity reduces (particularly the pore that is communicated with reduces), the bleeding quantity reduction; This polymkeric substance makes mortar elasticity obviously improve (backfin than reduce) simultaneously, and viscosity increases, and water retention capacity improves, resistance to cleavage be improved significantly.
Experiment shows, compares with ordinary mortar, and the polymer modifiers of 2% volume makes the anticracking grout backfin than reducing more than 100%, and 5% flexural deformation also flawless produces, and workability obviously strengthens.
D. inorganic mineral powder is uniformly dispersed
Inorganic mineral powder is a kind of inert fill material, mainly plays " dilution " micro-component in the cracking resistance rubber powder, and micro-component can disperse uniformly, makes whole system have homogeneity; Be uniformly distributed in simultaneously in other raw materials, increase internal friction, the cracking resistance effect of mortar is strengthened, but volume is excessive, the viscosity of material descends to some extent.
E. infitration type elastic water-proof curing fluid capable
Infitration type elastic water-proof curing fluid capable is owing to itself have water-proof function, and in this structure, the moisture evaporation that stops outside moisture to enter mortar and screed plays certain maintenance action to the mortar premature cure, and reduces because the shrinkage cracking that moisture evaporation causes; Infitration type elastic water-proof curing fluid capable partly penetrates into the new crack-resistant layer of the interior formation of pore of mortar simultaneously, and promptly interface transition layer constitutes two-layer compound anticracking grout system with screed, has double-deck anti-cracking function.
In sum, utilize the materialogy principle, the fiber-reinforced polymer modification anticracking grout of design has the characteristics such as little, that water retention property good, cohesive strength is high and weather-proof resistance to cleavage is good of self shrinking, be the ideal special cracking resistant mortar of building heat preservation heat insulation wall, the detected result of this fiber-reinforced polymer modification anticracking grout and the report of the technology for detection of waterproof curing fluid capable are shown in table 1, table 2.
Table 1 cracking resistance rubber powder survey report
| Sequence number | Test item | Measure unit | Standard-required | Measured result |
| ??1 | Tensile bond strength (former intensity) | ????MPa | ??≥0.10 | ??0.63-0.75 |
| ??2 | Snappiness (resistance to compression/anti-folding) | ??≤3.0 | ???2.1-2.4 | |
| ??3 | Operable time | ????h | ?1.5～4.0 | ???2.5-3.5 |
| ??4 | Shrinkage value | ????％ | ?≤0.03％ | ?0.01-0.025％ |
| Conclusion | Satisfy the JG149-2003 standard-required | |||
The technology for detection report of table 2 elastic coating
| Sequence number | Test item | Measure unit | Standard-required | Measured result |
| ??1 | Condition in container | Stirring the back does not have caking, is uniform state | Up to standard | |
| ??2 | Application property | Brush accessible | Up to standard | |
| ??3 | Tensile strength | ??MPa | ?????≥1.5 | ??1.53 |
| ????4 | Tension set | ????％ | ????≥300 | ???1283 | |
| ????5 | Low temperature elasticity is around Φ 10mm rod | -20 ℃, flawless | Flawless | ||
| ????6 | Watertightness | 0.3MPa, 0.5h is waterproof | Waterproof | ||
| ????7 | Time of drying | Surface drying time | ????h | ????≤4 | ??3h40min |
| Do solid work the time | ????≤8 | ??7h55min | |||
| ????8 | Burin-in process back draft strength retention | Heat treated | ????％ | ????≥80 | ????308 |
| UV treatment | ????≥80 | ????146 | |||
| Alkaline purification | ????≥60 | ????63 | |||
| Acid treatment | ????≥40 | ????57 | |||
| ????9 | Tension set after the burin-in process | Heat treated | ????％ | ????≥200 | ????507 |
| UV treatment | ????≥200 | ????771 | |||
| Alkaline purification | ????≥200 | ????778 | |||
| Conclusion | Satisfy the Q/WAJ01-2004 standard-required | ||||
Four, embodiment:
Embodiment 1:
A kind of fiber-reinforced polymer modification anticracking grout, its component and content (weight) are: 1 part of cracking resistance rubber powder, 2 parts of cement, 12 parts in sand, 2.3 parts in water; Wherein: the component of cracking resistance rubber powder and content (weight) are: inorganic mineral powder 23.7%, alkali proof fiber 0.3%, volume stabilizer 32%, polymer modifiers 44%, used cement is 42.5 ordinary Portland cements, alkali proof fiber is a polypropylene fibre, volume stabilizer is composited according to weight ratio by the air entrapment agent of swelling agent and anionic at 5000: 1, polymer modifiers is composited according to weight ratio by vinyl acetate between to for plastic and carboxy-propyl cellulose at 2: 1, and the top layer has been coated with that layer infitration type waterproof curing fluid capable---the waterproof curing fluid capable is commercially available vinylformic acid organic elastomer coating.
Embodiment 2:
A kind of fiber-reinforced polymer modification anticracking grout, its component and content (weight) are: 1 part of cracking resistance rubber powder, 2.5 parts of cement, 10 parts in sand, 2 parts in water; Wherein: the component of cracking resistance rubber powder and content (weight) are: inorganic mineral powder 30%, alkali proof fiber 1%, volume stabilizer 39%, polymer modifiers 30%.Used cement is 42.5 aluminosulfate cements, and alkali proof fiber is a nylon fiber, and volume stabilizer is composited according to weight ratio by the air entrapment agent of swelling agent and anionic at 5000: 1, and polymer modifiers is a carboxymethyl cellulose.The top layer has been coated with that layer infitration type waterproof curing fluid capable---the waterproof curing fluid capable is commercially available vinylformic acid organic elastomer coating.
Embodiment 3:
A kind of fiber-reinforced polymer modification anticracking grout, its component and content (weight) are: 1 part of cracking resistance rubber powder, 2.3 parts of cement, 11 parts in sand, 2.5 parts in water; Wherein: the component of cracking resistance rubber powder and content (weight) are: inorganic mineral powder 49%, alkali proof fiber 2%, volume stabilizer 29%, polymer modifiers 20%.Used cement is 42.5 ordinary Portland cements, alkali proof fiber is a polypropylene fibre, volume stabilizer is composited according to weight ratio by the air entrapment agent of swelling agent and anionic at 5000: 1, according to weight ratio 1: 1, it was commercially available vinylformic acid organic elastomer coating that the top layer has been coated with layer infitration type waterproof curing fluid capable one-waterproof curing fluid capable to polymer modifiers by carboxymethyl cellulose and carboxy-propyl cellulose.
Claims (5)
1. fiber-reinforced polymer modification anticracking grout, it is characterized in that: it is made up of cracking resistance matrix and infitration type waterproof curing fluid capable, the component of cracking resistance matrix and content (weight) are: 1 part of cracking resistance rubber powder, 2～2.5 parts of cement, 10～12 parts in sand, 2～6 parts in water, the component of cracking resistance rubber powder and content (weight) are: inorganic mineral powder 20～50%, alkali proof fiber 0.1～4%, volume stabilizer 25～40%, polymer modifiers 20～45%, infitration type waterproof curing fluid capable are a kind of organic elastomer coating of oleic series.
2. according to the described a kind of fiber-reinforced polymer modification anticracking grout of claim 1, it is characterized in that: described cement is a kind of in ordinary Portland cement, aluminosulfate cement, the Portland blast.
3. according to the described a kind of fiber-reinforced polymer modification anticracking grout of claim 1, it is characterized in that: described alkali proof fiber is one or more compound in polypropylene fibre, alkali resistant glass fiber, nylon fiber, the animal and plant fiber.
4. according to the described a kind of fiber-reinforced polymer modification anticracking grout of claim 1, it is characterized in that: described volume stabilizer is that the air entrapment agent of swelling agent and anionic is composited according to weight ratio at 5000: 1.
5. according to the described a kind of fiber-reinforced polymer modification anticracking grout of claim 1, it is characterized in that: described polymer modifiers is one or more the combination in carboxymethyl cellulose, carboxy-propyl cellulose, hydroxyl first class Mierocrystalline cellulose, hydroxypropylcellulose, vinyl acetate between to for plastic dry powder, the polyethylene dry powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100134765A CN1253400C (en) | 2004-07-16 | 2004-07-16 | Fiber-reinforced polymer modified crack resistant mortar |
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| CNB2004100134765A CN1253400C (en) | 2004-07-16 | 2004-07-16 | Fiber-reinforced polymer modified crack resistant mortar |
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| CN1253400C CN1253400C (en) | 2006-04-26 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244915B (en) * | 2008-03-25 | 2010-06-02 | 武汉理工大学 | Ultra-plasticizing gravity flow flat crack resistant mortar |
| CN101250048B (en) * | 2007-02-25 | 2012-04-25 | 陈雄载 | Heat-proof insulation waterproof dry-mixed mortar and preparation thereof |
| CN101591481B (en) * | 2008-05-26 | 2012-06-13 | 亚士漆(上海)有限公司 | Inorganic dry powder painting |
| CN102898087A (en) * | 2012-11-07 | 2013-01-30 | 刘倩 | Anti-cracking modified cement and preparation technology thereof |
| CN103086657A (en) * | 2013-01-08 | 2013-05-08 | 张立功 | Interface-enhanced anti-crack mortar and production technology thereof |
| CN105153673A (en) * | 2015-07-15 | 2015-12-16 | 常州市武进金阳光电子有限公司 | Crack, oil and high temperature resistant polymer modified exterior wall material and production technology thereof |
| CN105585287A (en) * | 2015-12-17 | 2016-05-18 | 梅庆波 | Method for preparing anti-crack mortar |
| CN106189630A (en) * | 2016-07-29 | 2016-12-07 | 上海轩颂建筑科技有限公司 | A kind of rendering technique of wall face figure floriation |
| CN109629699A (en) * | 2018-12-18 | 2019-04-16 | 中核华辰建筑工程有限公司 | Shear wall screw hole sealing agent and method for blocking |
| CN110204267A (en) * | 2019-07-11 | 2019-09-06 | 福建省顺天亿建设有限公司 | A kind of technique preparing cracking-resistant cement mortar using plant fiber |
| WO2022022092A1 (en) * | 2020-07-27 | 2022-02-03 | 中铁十四局集团有限公司 | Earthquake-resistant synchronous grouting material |
-
2004
- 2004-07-16 CN CNB2004100134765A patent/CN1253400C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250048B (en) * | 2007-02-25 | 2012-04-25 | 陈雄载 | Heat-proof insulation waterproof dry-mixed mortar and preparation thereof |
| CN101244915B (en) * | 2008-03-25 | 2010-06-02 | 武汉理工大学 | Ultra-plasticizing gravity flow flat crack resistant mortar |
| CN101591481B (en) * | 2008-05-26 | 2012-06-13 | 亚士漆(上海)有限公司 | Inorganic dry powder painting |
| CN102898087A (en) * | 2012-11-07 | 2013-01-30 | 刘倩 | Anti-cracking modified cement and preparation technology thereof |
| CN103086657A (en) * | 2013-01-08 | 2013-05-08 | 张立功 | Interface-enhanced anti-crack mortar and production technology thereof |
| CN105153673A (en) * | 2015-07-15 | 2015-12-16 | 常州市武进金阳光电子有限公司 | Crack, oil and high temperature resistant polymer modified exterior wall material and production technology thereof |
| CN105585287A (en) * | 2015-12-17 | 2016-05-18 | 梅庆波 | Method for preparing anti-crack mortar |
| CN106189630A (en) * | 2016-07-29 | 2016-12-07 | 上海轩颂建筑科技有限公司 | A kind of rendering technique of wall face figure floriation |
| CN109629699A (en) * | 2018-12-18 | 2019-04-16 | 中核华辰建筑工程有限公司 | Shear wall screw hole sealing agent and method for blocking |
| CN110204267A (en) * | 2019-07-11 | 2019-09-06 | 福建省顺天亿建设有限公司 | A kind of technique preparing cracking-resistant cement mortar using plant fiber |
| CN110204267B (en) * | 2019-07-11 | 2020-05-05 | 福建省顺天亿建设有限公司 | Process for preparing anti-crack cement mortar by using plant fibers |
| WO2022022092A1 (en) * | 2020-07-27 | 2022-02-03 | 中铁十四局集团有限公司 | Earthquake-resistant synchronous grouting material |
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| CN1253400C (en) | 2006-04-26 |
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