CN101983945A - Micro-expansion super early-strength bearing grout - Google Patents
Micro-expansion super early-strength bearing grout Download PDFInfo
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- CN101983945A CN101983945A CN2009102722590A CN200910272259A CN101983945A CN 101983945 A CN101983945 A CN 101983945A CN 2009102722590 A CN2009102722590 A CN 2009102722590A CN 200910272259 A CN200910272259 A CN 200910272259A CN 101983945 A CN101983945 A CN 101983945A
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Abstract
The invention provides a micro-expansion super early-strength bearing grout which comprises the following raw materials in parts by weight: 30-50 parts of cement, 40-60 parts of sand, 0.5-2.5 parts of water-reducing agent, 2-4 parts of expanding agent, 0.1-0.5 part of retarder and 5-10 parts of enhancer. The micro-expansion super early-strength bearing grout has the following advantages: (1) the working property is excellent, the initial fluidity reaches 320mm, and the fluidity at 30min is still above 240mm; (2) the early strength has rapid development, the strength at the late stage is not reduced, the compressive strength at 2h can be more than 20MPa, the compressive strength at 24h is more than 40MPa, the flexural strength is greater than 10MPa, and the compressive strength at 28d is greater than 50MPa; and (3) the micro-expansion super early-strength bearing grout has micro-expansion property. In view of the advantages, the micro-expansion super early-strength bearing grout can effectively improve the construction rate of a foundation bearing and other structures, and ensure the installation conformance and the construction quality of members.
Description
Technical field
The present invention relates to a kind of microdilatancy ultra high-early strength support saddle grouting material, be applied to the quick repairing and the reinforcing of the grouting of bridge pad gravity, the grouting of Equipment Foundations lower margin bolt, concrete structure, belong to the cement-based grouting material technical field.
Technical background
In recent years, Infrastructure is in high speed construction period, in the bridge construction process, relates to the installation of the pot rubber bearing of a large amount of prefabricated simple supported box beams and cast-in-place beam, need be in the milk to case beam and bearing connecting portion, supports and the fixed effect to play; In industry such as heavy-duty machinery, relate to the installation and the reparation of large equipment base bearing, also need the lower margin bolt of Equipment Foundations is in the milk, equipment is moved as early as possible, produce and continue.Therefore, Fast Installation and guarantee high-quality installation or repair bearing how often becomes the control construction speed, improves the key of production schedule.Traditional injection material degree of mobilization easily loses, and strength development is slow, needs the above maintenance of 7d usually, prolongs equipment turnround, influences construction speed; And because volumetric shrinkage in the grouting material hydration process, it is not closely connected to cause bearing installation back to connect easily, influences construction quality.As the high-strength grout that contains ultrafine powder that proposes among the patent CN101269943A, initial flow degree 285mm, 6h ultimate compression strength 20MPa, the fast-hardening expendable grout for emergency construction that proposes among the patent CN 1356285A, initial flow degree 250mm, 6h ultimate compression strength 20MPa can't satisfy in the engineering requirement to concrete member quick anchoring and reparation.
Summary of the invention
The purpose of this invention is to provide a kind of base support quick anchoring that is applied to, reach the microdilatancy ultra high-early strength support saddle grouting material of the quick reparation of concrete member, the initial flow degree of this material is greater than 320mm, the 30min degree of mobilization is greater than 240mm, 2h ultimate compression strength is greater than 20MPa, the 24h folding strength is greater than 10MPa, and the 28d rate of expansion is 0.02～0.1%.
For realizing above purpose, technical scheme of the present invention provides a kind of microdilatancy ultra high-early strength support saddle grouting material, it is characterized in that: raw material is formed proportioning and is by weight: 30～50 parts of cement, 40～60 parts in sand, 0.5～2.5 part of water reducer, 2～4 parts of swelling agents, 0.1～0.5 part of retardant, 5～10 parts of tougheners.
Cement described in the appeal support grouting material is ordinary Portland cement, and cement is handled through airflow milling, and being worked into median size is 10～15 μ m; Sand is quartz sand, and particle diameter is 0.2～2mm; Water reducer is a poly carboxylic acid series water reducer; Swelling agent is a magnesium oxide; Retardant is a polyalcohols, as Sunmorl N 60S; Toughener is a calcium formiate.
A kind of making method of microdilatancy ultra high-early strength support saddle grouting material is: take by weighing earlier every raw material by weight percentage, again sand, water reducer, swelling agent, retardant, toughener are dropped into stirrer for mixing and stir 5～10min, then cement is evenly dropped into stirrer, continue to stir 10～20min, be packaged into bag at last and get final product.During use, the microdilatancy type ultra high-early strength support saddle grouting material that the present invention is prepared adopts stirrer machinery to stir 3～5min according to the water of weight percent adding 14～16%, makes slurry even, and is promptly pourable.
The invention has the advantages that: (1) but application property is good: slurry initial flow degree 320-360mm, degree of mobilization can be realized thin layer microgravity grouting behind the 30min more than 240mm; (2) the microdilatancy performance of grouting material can guarantee that slurry contacts fully with the interface that is filled; (3) good epistasis energy morning, 2h ultimate compression strength can reach 20-30MPa, can realize rapid construction, raises the efficiency; (4) later stage has very high ultimate compression strength and folding strength, and later strength does not descend, and guarantees the quality of construction work; (5) under summer high temperature condition and winter low temperature condition, all can construct, not influence application performance, not influence the duration.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
Take by weighing each raw material earlier: cement 30kg, sand 60kg, water reducer 0.5kg, swelling agent 2kg, retardant 0.1kg, toughener 10kg.Again sand, water reducer, swelling agent, retardant, toughener are dropped into stirrer for mixing and stir 5～10min, then cement is evenly dropped into stirrer, continue to stir 10～20min, be packaged into bag at last and get final product.
Add 14% water during use by weight percentage, mechanical stirring 3～5min, promptly pourable.Gained grouting material initial flow degree 330mm, 30min degree of mobilization 260mm, 2h ultimate compression strength 22.3MPa, 24h folding strength 10.6MPa, 28d ultimate compression strength 56.7MPa, the 28d rate of expansion is 0.03%.
Embodiment 2
Take by weighing each raw material earlier: cement 40kg, sand 50kg, water reducer 1.5kg, swelling agent 3kg, retardant 0.3kg, toughener 7kg.Again sand, water reducer, swelling agent, retardant, toughener are dropped into stirrer for mixing and stir 5～10min, then cement is evenly dropped into stirrer, continue to stir 10～20min, be packaged into bag at last and get final product.
Add 15% water during use by weight percentage, mechanical stirring 3～5min, promptly pourable.Gained grouting material ren beginning degree of mobilization 340mm, 30min degree of mobilization 265mm, 2h ultimate compression strength 26.1MPa, 24h folding strength 11.4MPa, 28d ultimate compression strength 58.7MPa, the 28d rate of expansion is 0.04%.
Embodiment 3
Take by weighing each raw material earlier: cement 50kg, sand 40kg, water reducer 2.5kg, swelling agent 4kg, retardant 0.5kg, toughener 5kg.Again sand, water reducer, swelling agent, retardant, toughener are dropped into stirrer for mixing and stir 5～10min, then cement is evenly dropped into stirrer, continue to stir 10～20min, be packaged into bag at last and get final product.
Add 16% water during use by weight percentage, mechanical stirring 3～5min, promptly pourable.Gained grouting material initial flow degree 335mm, 30min degree of mobilization 245mm, 2h ultimate compression strength 22.8MPa, 24h folding strength 10.7MPa, 28d ultimate compression strength 54.2MPa, the 28d rate of expansion is 0.03%.
Claims (7)
1. a microdilatancy ultra high-early strength support saddle grouting is expected, it is characterized in that: raw material is formed proportioning and is by weight: 30～50 parts of cement, 40～60 parts in sand, 0.5～2.5 part of water reducer, 2～4 parts of swelling agents, 0.1～0.5 part of retardant, 5～10 parts of tougheners.
2. microdilatancy ultra high-early strength support saddle grouting material according to claim 1, it is characterized in that: used cement is ordinary Portland cement, and cement is handled through airflow milling, and being worked into median size is 10～15 μ m.
3. microdilatancy ultra high-early strength support saddle grouting material according to claim 1, it is characterized in that: used sand is quartz sand, particle diameter is 0.2～2mm.
4. microdilatancy ultra high-early strength support saddle grouting material according to claim 1, it is characterized in that: used water reducer is a poly carboxylic acid series water reducer.
5. microdilatancy ultra high-early strength support saddle grouting material according to claim 1, it is characterized in that: used swelling agent is a magnesium oxide.
6. microdilatancy ultra high-early strength support saddle grouting material according to claim 1, it is characterized in that: used retardant is a polyalcohols, as Sunmorl N 60S.
7. microdilatancy ultra high-early strength support saddle grouting material according to claim 1, it is characterized in that: used toughener is a calcium formiate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102722590A CN101983945A (en) | 2009-09-29 | 2009-09-29 | Micro-expansion super early-strength bearing grout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102722590A CN101983945A (en) | 2009-09-29 | 2009-09-29 | Micro-expansion super early-strength bearing grout |
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| CN101983945A true CN101983945A (en) | 2011-03-09 |
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| CN2009102722590A Pending CN101983945A (en) | 2009-09-29 | 2009-09-29 | Micro-expansion super early-strength bearing grout |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745958A (en) * | 2012-07-02 | 2012-10-24 | 东盟营造工程有限公司 | Rapid repair material for cement concrete airfield pavement |
| CN103553479A (en) * | 2013-09-24 | 2014-02-05 | 高碑店市达奥新型建材有限公司 | Low-viscosity flow-second grouting material capable of being used in a nuclear power industry |
| CN104692736A (en) * | 2013-12-10 | 2015-06-10 | 五冶集团上海有限公司 | Anti-cracking large-size early-strength, high-strength and micro-expansion M grouting material and construction method thereof |
| CN108751857A (en) * | 2018-07-11 | 2018-11-06 | 合肥梵腾环保科技有限公司 | A kind of preparation method of microdilatancy high strength grout |
| CN115385637A (en) * | 2021-05-25 | 2022-11-25 | 武汉塔牌华轩新材料科技有限公司 | Low-temperature super-early-strength sleeve grouting material for prefabricated building |
-
2009
- 2009-09-29 CN CN2009102722590A patent/CN101983945A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745958A (en) * | 2012-07-02 | 2012-10-24 | 东盟营造工程有限公司 | Rapid repair material for cement concrete airfield pavement |
| CN102745958B (en) * | 2012-07-02 | 2014-02-26 | 东盟营造工程有限公司 | Rapid repair material for cement concrete airfield pavement |
| CN103553479A (en) * | 2013-09-24 | 2014-02-05 | 高碑店市达奥新型建材有限公司 | Low-viscosity flow-second grouting material capable of being used in a nuclear power industry |
| CN103553479B (en) * | 2013-09-24 | 2015-12-23 | 河北达奥达建材科技有限公司 | A kind of low-viscosity neutrel grouting material that can be used for the industries such as nuclear power |
| CN104692736A (en) * | 2013-12-10 | 2015-06-10 | 五冶集团上海有限公司 | Anti-cracking large-size early-strength, high-strength and micro-expansion M grouting material and construction method thereof |
| CN108751857A (en) * | 2018-07-11 | 2018-11-06 | 合肥梵腾环保科技有限公司 | A kind of preparation method of microdilatancy high strength grout |
| CN115385637A (en) * | 2021-05-25 | 2022-11-25 | 武汉塔牌华轩新材料科技有限公司 | Low-temperature super-early-strength sleeve grouting material for prefabricated building |
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Application publication date: 20110309 |