CN102320793A - Quick-hardening self-compacting anti-cracking high-performance grouting material - Google Patents
Quick-hardening self-compacting anti-cracking high-performance grouting material Download PDFInfo
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Abstract
The invention relates to a quick-hardening self-compacting anti-cracking high-performance grouting material which can be used for urban road inspection-well rush-repair projects, and raw materials for manufacturing the grouting material are as follows in percentage by weight: 10-30 percent of silicate cement, 20-40 percent of quick-hardening cement, 40-60 percent of quartz sand, 0.06-0.25 percent of hardening-accelerating component, 0.01-0.1 percent of coagulation-delaying component, 0.5-1.9 percent of redispersible polymer glue powder, 0.005-0.2 percent of cellulose ether, 0.08-0.2 percent of defoaming agent and 0.61-1 percent of high-efficiency water-reducing agent. A quick-hardening high-performance dry grouting mixed material is obtained after the components are proportionally and uniformly mixed. When the grouting material is used, water is added to the dry mixed material for stirring, and the proportion by weight of the water and the dry mixed material is 0.14 to 0.18. The grouting material disclosed by the invention has the characteristics of quick hardening, self-compaction, anti-cracking and the like and simultaneously has good freezing-melting resistance, durability, old and new interface-bonding property and volume stability.
Description
Technical field
The present invention relates to the fast hard high performance grouting material of a kind of cement based, belong to salvaging of urban road inspection chamber or construction project repairing material therefor field.
Background technology
Because the road traffic load is big and maintenance is convenient, the urban road inspection chamber adopts casting iron well lid more.In the former inspection chamber structure, well lid is isolating with carrying the cast iron frame, causes casting iron well lid often to lose.Though replace casting iron well lid can solve the problem of losing with reinforced concrete well lid, the heavy burden that the traffic flow that reinforced concrete well lid can not bear to be increased is day by day brought, especially tens of tons of load-carrying vehicle is easy to cause the damage of well lid.Losing and damaging on the one hand serious threat traffic safety of well lid also influences city look and feel on the other hand.
Problem for once and for all solution well lid can adopt the transformation of built-up type well lid to have the separate type well lid now.The built-up type well lid is the separate type well lid to be fixed on hinge carry on the cast iron frame, and switch is difficult for losing freely.Original well lid can be at first removed in concrete transformation; Laid the small size collar tie beam of high-strength bolt pre-buried at the inspection chamber well head; Then will be fixed by bolts on the collar tie beam with carrying cast iron frame with the well lid of hinge combination; And adjustment height is to designed elevation, the injection material that adopts large fluidity then with well lid and collar tie beam and on every side the gap between the matrix carry out filling, the bituminous concrete of treating at last behind the hardened material to pave on the surface.Also can at first adopt during transformation cushion block will with the well lid of hinge combination with carry cast iron frame bed hedgehopping to designed elevation; Then carry and reveal the empty well body below the cast iron frame with the sealing of flexible strip hoop; Adopt injection material filling well lid and the collar tie beam of large fluidity and the gap between the matrix on every side then, the bituminous concrete of treating at last behind the hardened material to pave on the surface.
Traffic pressure in order to reduce to construct and to cause is open to traffic as early as possible, and all operation needs in 1～2 hour, to accomplish at least.Because paving of bituminous concrete needs behind hardened material, just can carry out; Therefore the large fluidity injection material must possess fast iron-cloth ability; Build and to harden after 40～50 minutes to satisfy the needs that bituminous concrete paves and constructs; Promptly possess higher hour intensity, and this material need reach enough intensity with the load vehicular load in 2 hours.Because what need build is an annular solid space, therefore also require injection material to possess good resistance to cleavage.In addition, this material also need possess favorable durability, freeze-thaw resistance, the old and new's bonding interface performance and volume stability.Common high-strength shrinking-free grouting material possessed flows greatly, do not have and characteristics such as shrink, high-strength and can not satisfy requirement of engineering.Add the requirement that rapid hardening cement can not satisfy snap cure in 2 hours at common high-strength shrinking-free grouting material.
Document Investigation is in the past got, adopt silicate cement, yellow ground, hardening accelerator, Na among the ZL00116214.4 " ultra early-strength grouting material "
2CO
3, Hydrocerol A and high efficiency water reducing agent because design of components is limit,, do not possess good splitting resistance, the old and new's bonding interface performance and volume stability though possess certain morning of strong characteristics.Adopt silicate cement, silica sand etc. among the ZL200610091071.2 " a kind of no-shrinkage grouting filler with adjustable performance ", owing to do not have early strong, fast hard component and improve the adhesiveproperties component and do not possess higher hour intensity and good the old and new's bonding interface performance.The mortar of announcing is limit because of functional design in " super early strength polymer rapid-patching motar material " (application number 201010183541.4), though the early strong characteristics of its tool do not possess the large-flow grouting performance, therefore only can be used for the repairing of body structure surface defective.Do not see the fast hard high performance grouting material that possesses fast hard characteristics and good self compacting ability, splitting resistance, weather resistance, freeze-thaw resistance, the old and new's bonding interface performance and volume stability simultaneously in the data in the past.
Summary of the invention
The present invention is that the repairing operating mode for urban road inspection chamber salvaging and other construction project provides a kind of and possesses fast hard, self-compacting, cracking resistance characteristics and have high performance grouting material of good freeze-thaw resistance, weather resistance, the old and new's bonding interface performance and volume stability and preparation method thereof concurrently.
The present invention is to provide a kind of compsn of fast hard self-compacting cracking resistance high performance grouting material, each weight percentages of components is in the said composition: silicate cement 10%～30%, rapid hardening cement 20%～40%, silica sand 40%～60%, short hard component 0.06%～0.25%, slow setting component 0.01%～0.1%, redispersible polymer rubber powder 0.5%～1.9%, methyl cellulose ether 0.005%～0.2%, skimmer 0.08%～0.2%, high efficiency water reducing agent 0.61%～1%.
The compsn that each component cooperates according to the above ratio can make injection material of the present invention have characteristics such as fast hard, self-compacting, cracking resistance and has good freeze-thaw resistance, weather resistance, the old and new's bonding interface performance and volume stability concurrently.
This high performance grouting material is a kind of dry blend, adds the water stirring at the use scene and can use in 1～2 minute, and the weight ratio of water and grouting dry blend according to the invention is 0.14～0.18.
In the present invention, as the short hard component of cement, can quicken the cement snap cure, especially quick hardening sulphoaluminate cement played a role clearly, can significantly improve the early strength of slurry with alkaline carbonate or oxyhydroxide.Here said basic metal is lithium, sodium or potassium.The consumption of short hard component is 0.06%～0.25% among the present invention.
Used cement is silicate cement and rapid hardening cement among the present invention, and wherein rapid hardening cement is a kind of in quick hardening sulphoaluminate cement or the quick hardening Portland cement, and ordinary Portland cement is for meeting the silicate cement of GB175 " general purpose portland cement ".Rapid hardening cement can make slurry have higher early strength, under the acting in conjunction of rapid hardening cement and short hard component, but the slurry snap cure.And the use of ordinary Portland cement can guarantee the stable long-term strength development of slurry.Injection material of the present invention adds water and stirs construction after 50 minutes, and ultimate compression strength can reach more than the 8MPa, and ultimate compression strength can reach more than the 12MPa after 1.5 hours, and flexural tensile strength can reach more than the 1.8MPa; Ultimate compression strength can reach more than the 45MPa after 28 days.Therefore, the combination of silicate cement and rapid hardening cement is used, and be used short hard component, can make to reach fast hard, the effect of strong, later strength development stability early after the injection material construction.
Silica sand used among the present invention is made up of 20～40 order silica sands and 40～70 order silica sands jointly, and the two ratio was greater than 3: 2.The silica sand chemical property is stable, intensity is high, uses mainly as framework material.
Among the present invention, the consumption of water reducer and redispersible polymer is bigger to the fluidity of slurry influence.For thereby the large fluidity that guarantees slurry is realized its self compacting ability and resistance to cleavage; The used water reducer of the present invention is a kind of in naphthalenesulfonate water reducer, sulfamate water reducer, melamine water reducer or the polycarboxylate water-reducer; The consumption of water reducer is 0.61%～1%; Injection material degree of mobilization after adding the water stirring is reached more than the 340mm; This large fluidity can guarantee injection material cast back under the deadweight effect automatically, packing space densely, thereby improve the density and the resistance to cleavage of product.The consumption of water reducer is less than 0.61% of gross weight, and then the injection material flowability is not good; The consumption of water reducer then is easy to generate problems such as layering, segregation, bleeding greater than 1%.
Redispersible polymer rubber powder among the present invention plays viscosifying action, can improve slurry and build the space bonding force at interface on every side, also plays the cracking resistance effect because of polymer glue powder has certain elasticity simultaneously.Among the present invention, redispersible polymer rubber powder consumption is 0.5%～2%, and product adds water and stirs construction after 1.5 hours, and bonding strength can reach more than the 2MPa.If redispersible polymer rubber powder consumption is less than 0.5%, then adhesive effect is relatively poor; The density of filling when influencing pouring if consumption greater than 2%, then can reduce the flowability of injection material, thus construction quality influenced, and can reduce the ultimate compression strength behind the hardened material.
Retardant can delay the presetting period of slurry, and short hard component can be quickened final set and the setting time that aquation shortens slurry, makes slurry in tens minutes, promptly experience initial set, final set and sclerosis.Used retardant is a kind of in borax, boric acid, tartrate or the Sunmorl N 60S among the present invention.
Suitable air content can make slurry under the prerequisite of not obvious reduction intensity, have good freezing and thawing performance; The present invention adopts the skimmer adjustment slurry of suitable volume to build the bubbles volume in the process in stirring; Have good freezing and thawing performance after making the slurry sclerosis, can stand freeze-thaw cycle effect more than 300 times through check.The used skimmer of the present invention is a polyethers powder skimmer.
Product of the present invention has good early stage resistance to cleavage, and its splitting resistance mainly is to adjust the flowability of slurry through adding water reducer, to improve the density after its sclerosis; Simultaneously, the redispersible polymer rubber powder has certain viscosifying action and elasticity, and is aided with methyl cellulose ether, also makes slurry possess good early stage resistance to cleavage, and the present invention takes place through cracking test and the no cracking phenomena of site operation check.
The injection material that the present invention is prepared has good density after its sclerosis, and through test, its displacement flux has good obstruction ion migration ability less than 800 coulombs, thereby possesses excellent weather resistance.Owing to adopt silica sand, make product of the present invention have good volume stability simultaneously as skeleton.
The present invention compared with prior art its advantage is: have snap cure and ultra early strong characteristics, early anti pressured intension is high, flexural tensile strength is high, bonding strength is high, reduction of erection time greatly, and the later strength development stability, security is good; Have good freeze-thaw resistance and anti-ion transport, good endurance; Time of coagulation is adjustable, and is easy to use, the dry-mixed mortar product that forms, and the scene adds the water stirring and got final product in 1～2 minute, can be closely knit automatically, time saving and energy saving during the construction perfusion, suitability is good.The present invention is fit to the grouting construction of (outdoor and indoor, low temperature and high temperature) different sites under the various environment, is particularly suitable for the construction of urban road inspection chamber improvement project, also can be used for the first-aid repair construction of other construction project.
Embodiment
Further the present invention will be described with embodiment below, and said embodiment is not the restriction to component of the present invention and performance range.
Embodiment 1
The raw material of this fast hard self-compacting cracking resistance high performance grouting material is formed proportioning:
Ordinary Portland cement 10%, quick hardening sulphoaluminate cement 38%, 20～40 order silica sands 40%; 40～70 order silica sands 10%; Salt of wormwood 0.24%, tartrate 0.08%, redispersible polymer rubber powder 0.7%; Methyl cellulose ether 0.01%, polyethers powder skimmer 0.14%, sulfamate water reducer 0.9%.
Above-mentioned materials is through mixed dry-mixed mortar, on-the-spotly dry-mixed mortar and water are stirred into slurry in 1: 0.14 ratio get final product placing.Stir timing from adding water, initial set after 14.5 minutes, final set after 18 minutes, 20 minutes is initial hardening, can carry out next working procedure after 30 minutes.
The test of degree of mobilization and ultimate compression strength is with reference to JC/T986-2005 " cement-based grouting material "; The test of flexural tensile strength is with reference to JTG E30-2005 " highway engineering cement and cement concrete testing regulation "; The test of bonding strength is with reference to JC/T985-2005 " cement-based self-leveling mortar is used on ground "; The test of ring method splitting resistance and displacement flux is with reference to No. [2005] 157, iron construction " railway concrete structure durability design temporary provisions "; The test of knife-edge method splitting resistance and freezing and thawing performance is with reference to GB/T50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete standard ".The test result of each item performance is:
Degree of mobilization is 360mm; 40 minutes ultimate compression strength is 15.8MPa; 1.5 hour ultimate compression strength is 26.7MPa, flexural tensile strength is 2.8MPa, and bonding strength is 2.1MPa; 28 days ultimate compression strength is 55.4MPa, and freeze proof grade is F300, and displacement flux is 563 coulombs; Ring method and the test of knife-edge method cracking resistance are not all ftractureed each length of time.
Embodiment 2
The raw material of this fast hard self-compacting cracking resistance high performance grouting material is formed proportioning:
Ordinary Portland cement 26%, quick hardening sulphoaluminate cement 24%, 20～40 order silica sands 37%; 40～70 order silica sands 10%; Quilonum Retard 0.11%, Sunmorl N 60S 0.04%, redispersible polymer rubber powder 1.7%; Methyl cellulose ether 0.11%, polyethers powder skimmer 0.11%, melamine water reducer 0.93%.
Above-mentioned materials is through mixed dry-mixed mortar, on-the-spotly dry-mixed mortar and water are stirred into slurry in 1: 0.15 ratio get final product placing.Stir timing from adding water, initial set after 16 minutes, final set after 22 minutes, 24 minutes is initial hardening, can carry out next working procedure after 38 minutes.
Its The performance test results is:
Degree of mobilization is 340mm; 40 minutes ultimate compression strength is 10.2MPa; 1.5 hour ultimate compression strength is 14.6MPa, flexural tensile strength is 1.9MPa, and bonding strength is 2.4MPa; 28 days ultimate compression strength is 48.2MPa, and freeze proof grade is F375, and displacement flux is 891 coulombs; Ring method and the test of knife-edge method cracking resistance are not all ftractureed each length of time.
Embodiment 3
The raw material of this fast hard self-compacting cracking resistance high performance grouting material is formed proportioning:
Ordinary Portland cement 20%, quick hardening Portland cement 30%, 20～40 order silica sands 37%; 40～70 order silica sands 11%; Pottasium Hydroxide 0.15%, borax 0.09%, redispersible polymer rubber powder 1.0%; Methyl cellulose ether 0.1%, polyethers powder skimmer 0.09%, naphthalenesulfonate water reducer 0.8%.
Above-mentioned materials is through mixed dry-mixed mortar, on-the-spotly dry-mixed mortar and water are stirred into slurry in 1: 0.16 ratio get final product placing.Stir timing from adding water, initial set after 18 minutes, final set after 28 minutes, 35 minutes is initial hardening, can carry out next working procedure after 50 minutes.
Its The performance test results is:
Degree of mobilization is 340mm; 50 minutes ultimate compression strength is 8.1MPa; 1.5 hour ultimate compression strength is 12.1MPa, flexural tensile strength is 1.82MPa, and bonding strength is 2.5MPa; 28 days ultimate compression strength is 60.2MPa, and freeze proof grade is F450, and displacement flux is 632 coulombs; Ring method and the test of knife-edge method cracking resistance are not all ftractureed each length of time.
Embodiment 4
The raw material of this fast hard self-compacting cracking resistance high performance grouting material is formed proportioning:
Ordinary Portland cement 16%, quick hardening Portland cement 32%, 20～40 order silica sands 36.8%; 40～70 order silica sands 12%; Sodium hydroxide 0.20%, boric acid 0.06%, redispersible polymer rubber powder 1.9%; Methyl cellulose ether 0.18%, polyethers powder skimmer 0.17%, polycarboxylate water-reducer 0.7%.
Above-mentioned materials is through mixed dry-mixed mortar, on-the-spotly dry-mixed mortar and water are stirred into slurry in 1: 0.18 ratio get final product placing.Stir timing from adding water, initial set after 16 minutes, final set after 25 minutes, 32 minutes is initial hardening, can carry out next working procedure after 45 minutes.
Its The performance test results is:
Degree of mobilization is 340mm; 45 minutes ultimate compression strength is 8.4MPa; 1.5 hour ultimate compression strength is 13.2MPa, flexural tensile strength is 2.4MPa, and bonding strength is 2.8MPa; 28 days ultimate compression strength is 50.3MPa, and freeze proof grade is F300, and displacement flux is 812 coulombs; Ring method and the test of knife-edge method cracking resistance are not all ftractureed each length of time.
Claims (7)
1. one kind is used for the fast compsn of self-compacting cracking resistance high performance grouting material firmly that the urban road inspection chamber is salvaged, and it is characterized in that each compositions in weight percentage is in the said composition:
2. fast hard self-compacting cracking resistance high performance grouting material as claimed in claim 1 is characterized in that used rapid hardening cement is a kind of in quick hardening sulphoaluminate cement or the quick hardening Portland cement.
3. fast hard self-compacting cracking resistance high performance grouting material as claimed in claim 1; It is characterized in that used short hard component is a kind of alkaline carbonate or alkali metal hydroxide; Basic metal wherein is a kind of in lithium, sodium or the potassium, and the consumption of short hard component is 0.06%～0.25%.
4. fast hard self-compacting cracking resistance high performance grouting material as claimed in claim 1 is characterized in that used silica sand is made up of 20～40 order silica sands and 40～70 order silica sands jointly, and the two weight ratio was greater than 3: 2.
5. fast hard self-compacting cracking resistance high performance grouting material as claimed in claim 1, the consumption that it is characterized in that used redispersible polymer rubber powder is 0.5%～1.9%, can be any redispersible polymer rubber powder.
6. fast hard self-compacting cracking resistance high performance grouting material as claimed in claim 1 is characterized in that used water reducer is a kind of in naphthalenesulfonate water reducer, sulfamate water reducer, melamine water reducer and the polycarboxylate water-reducer, and its consumption is 0.61%～1%.
7. fast hard self-compacting cracking resistance high performance grouting material as claimed in claim 1 is characterized in that the slow setting component is a kind of in borax, boric acid, tartrate or the Sunmorl N 60S; Skimmer is a polyethers powder skimmer.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102603250A (en) * | 2012-02-07 | 2012-07-25 | 南京红宝丽新材料有限公司 | Adhesion agent for treating surface of high inflaming retarding polyurethane insulation board |
| CN103449787A (en) * | 2012-05-28 | 2013-12-18 | 湖北中桥科技有限公司 | Underwater non-dispersible mortar and preparation method thereof |
| CN103866792A (en) * | 2014-04-04 | 2014-06-18 | 北京百世融通市政工程有限公司 | Construction technology for super-early-strength grouting material reinforced inspection well |
| CN105036664A (en) * | 2015-07-14 | 2015-11-11 | 林志炼 | Outdoor rapid repair mortar |
| CN105819736A (en) * | 2016-03-15 | 2016-08-03 | 苏州市兴邦化学建材有限公司 | Additive for producing steel fiber-concrete manhole covers |
| CN106630873A (en) * | 2016-12-21 | 2017-05-10 | 卡本复合材料（天津）有限公司 | Wet process spraying polymer mortar |
| CN112624699A (en) * | 2020-12-23 | 2021-04-09 | 山东省交通科学研究院 | Cold-state splicing adhesive for new and old water-stabilized base layer of road |
| CN114751704A (en) * | 2022-05-13 | 2022-07-15 | 中国建筑东北设计研究院有限公司 | Durable polymer mortar for high-strength steel wire cloth reinforced concrete member |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102603250A (en) * | 2012-02-07 | 2012-07-25 | 南京红宝丽新材料有限公司 | Adhesion agent for treating surface of high inflaming retarding polyurethane insulation board |
| CN103449787A (en) * | 2012-05-28 | 2013-12-18 | 湖北中桥科技有限公司 | Underwater non-dispersible mortar and preparation method thereof |
| CN103866792A (en) * | 2014-04-04 | 2014-06-18 | 北京百世融通市政工程有限公司 | Construction technology for super-early-strength grouting material reinforced inspection well |
| CN105036664A (en) * | 2015-07-14 | 2015-11-11 | 林志炼 | Outdoor rapid repair mortar |
| CN105819736A (en) * | 2016-03-15 | 2016-08-03 | 苏州市兴邦化学建材有限公司 | Additive for producing steel fiber-concrete manhole covers |
| CN106630873A (en) * | 2016-12-21 | 2017-05-10 | 卡本复合材料（天津）有限公司 | Wet process spraying polymer mortar |
| CN112624699A (en) * | 2020-12-23 | 2021-04-09 | 山东省交通科学研究院 | Cold-state splicing adhesive for new and old water-stabilized base layer of road |
| CN114751704A (en) * | 2022-05-13 | 2022-07-15 | 中国建筑东北设计研究院有限公司 | Durable polymer mortar for high-strength steel wire cloth reinforced concrete member |
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Inventor after: Xin Desheng Inventor after: Wang Yuesong Inventor after: Li Shibao Inventor after: Wang Yuehua Inventor after: Zheng Peng Inventor after: Wu Changlong Inventor after: Yang Xueyan Inventor after: Hu Haifeng Inventor before: Wu Changlong Inventor before: Xin Desheng Inventor before: Wang Yuesong Inventor before: Wang Yuehua Inventor before: Li Shibao Inventor before: Yang Xueyan Inventor before: Hu Haifeng |
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Free format text: CORRECT: INVENTOR; FROM: WU ZHANGLONG XIN DESHENG WANG YUESONG WANG YUEHUA LI SHIBAO YANG XUEYAN HUHAIFENG TO: XIN DESHENG WANG YUESONG LI SHIBAO WANG YUEHUA ZHENG PENG WU ZHANGLONG YANG XUEYAN HU HAIFENG |
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Application publication date: 20120118 |