CN103833260B - Environment-friendly high-efficiency grouting agent - Google Patents
Environment-friendly high-efficiency grouting agent Download PDFInfo
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- CN103833260B CN103833260B CN201410084851.9A CN201410084851A CN103833260B CN 103833260 B CN103833260 B CN 103833260B CN 201410084851 A CN201410084851 A CN 201410084851A CN 103833260 B CN103833260 B CN 103833260B
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Abstract
The present invention relates to a kind of environment-friendly high-efficiency grouting agent, it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 1.6 ~ 2.4g, methylcellulose gum 0.2 ~ 1.0g, poly carboxylic acid series water reducer 14 ~ 22g, UEA swelling agent 134 ~ 142g, ultra tiny calcium powder dirt 80 ~ 100g, gas ash 36 ~ 64g.The present invention is with low cost, grouting result is good.
Description
Technical field
The present invention relates to a kind of grouting agent, particularly relate to environment-friendly high-efficiency grouting agent.
Background technology
At home, traditional grouting material that early stage prestressed pore passage grouting uses is generally neat slurry, during construction, adopts cement, water, water reducer, swelling agent etc. to carry out extemporaneous preparation.The grouting material of extemporaneous preparation must meet: water cement ratio is 0.40 ~ 0.45, mixes appropriate water reducer, can be reduced to 0.35 minimum for water cement ratio; The maximum bleeding rate of grouting material must not more than 3%, and bleeding again should be absorbed by mortar in 24h; The viscosity of grouting material should control at 14 ~ 18s; Grouting material possesses certain expansion before solidifying; The ultimate compression strength of grouting material test block is not less than 50MPa.On-the-spot cement, various admixture and the water of adopting prepares grouting material, usually have that various admixture compatibility is bad, the problem such as cement and water reducer bad adaptability, duct grouting is caused to there are following serious problems: (1) slurry quality stability is poor, poor fluidity, flow losses fast, and volume stability is bad; (2) fresh paste bleeding is large, and in easily emanate layering, slurry, micro-foam is many, and mobility is bad, and time of coagulation is not moderate, often has some setbacks during slurry mud jacking, easy plugging, and speed of application is slow, and duct is also difficult to into full state etc.; (3) slurry eakiness after sclerosis, bubble, needle gap class space are many, and bond unreal with presstressed reinforcing steel, even have disconnected line in slurry, duct is not full, highly put outer slurry and play powder etc.The problems referred to above not only affect construction, and directly concern weather resistance and the safe handling of bridge structure.
In recent years, domestic traditional grouting material to extemporaneous preparation has carried out certain improvement, cement, water and multiple admixture is adopted to prepare, efficiently solve the problem that on-the-spot various admixture is compatible bad, but because China is geographical vast, each place is different for the production of the starting material of cement, and the cement otherness produced is very large, and thus the problem of cement and admixture bad adaptability still exists.
Abroad, the grouting material of duct grouting onsite application is generally premixing commodity grouting material, and premixing commodity grouting material is the product of batch production, pass through test design in advance, then be made into uniform powder in factory, be packaged into bag, only need illustratively add water at the construction field (site) stirs into slurry.The problems such as various admixture compatibility is bad, cement and water reducer bad adaptability that adopt premixing commodity grouting material effectively to solve.
Enforcement domestic JTG/T F50-2011 on August 1st, 2011 " highway bridge construction technical specifications " all improves a lot to mud jacking slurry performance each side index request, and on-the-spot premixing not can meet the requirements again, is finally eliminated.Domestic Grouting Technology level can protect prestress guiding principle muscle not expose and round corrosion along with increasing substantially better, ensures prestressed concrete structure safety; Make prestressed reinforced concrete have good bonding, ensure prestressed effective transmission between them, make deformed bar and concrete acting in conjunction; Eliminate the prestressed concrete structure fatigure failure that STRESS VARIATION causes ground tackle under course under cyclic loading, extend the work-ing life of ground tackle, improve reliability of structure.
Grouting agent major part complicated process of preparation in the market, addition content is high, cost is high, and simultaneously most of product performance exist certain defect.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of with low cost, environment-friendly high-efficiency grouting agent that grouting result is good.
For solving the problem, environment-friendly high-efficiency grouting agent of the present invention, is characterized in that: it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 1.6 ~ 2.4g, methylcellulose gum 0.2 ~ 1.0g, poly carboxylic acid series water reducer 14 ~ 22g, UEA swelling agent 134 ~ 142g, ultra tiny calcium powder dirt 80 ~ 100g, gas ash 36 ~ 64g.
Water-reducing rate >=35% of described poly carboxylic acid series water reducer.
Described ultra tiny calcium powder dirt refers to the raw material dust and high-temperature zone intense reaction and the particulate footpath dry gas cleaning produced and the product obtained that carry out along with coal gas in blast furnace ironmaking process.
The grain diameter of described gas ash is≤content requirement >=90% of 0.076mm more than.
The present invention compared with prior art has the following advantages:
1, the gas ash in the present invention and ultra tiny calcium powder dirt all belong to dedusting product, and the two chemical composition is different, and wherein gas ash main component is TFe and C, is secondly zinc oxide, silicon-dioxide, calcium oxide etc.; The main component of ultra tiny calcium powder dirt is calcium oxide, magnesium oxide and silicon-dioxide.They have following common feature: (1) particle diameter is extremely small, and density is little, easily fly away contaminate environment in air; (2) easily react, active good; (3) there is certain chemical toxicity.Develop and valuable resource not only can be made to be fully used to its comprehensive utilization, the pollution to environment can also be alleviated.And toxic substance is not only still all thought the most at present at home in the world, the safest, most effective measures to adopt cement solidification easily to float.
2, the ultra tiny calcium powder dirt of admixture in the present invention, because its particle diameter is close with SILICA FUME, has fabulous filling and " ball lubrication " effect after ripening, and significantly, water-reducing rate is up to more than 9% for physics water-reducing effect.Find that it not only slightly can improve strength of cement mortar through repeatedly cement paste and glue sand test, also can reduce cement normal consistency, there is water reducing ability (see table 1).
Table 1
3, the present invention is compared with like product of the prior art, has preparation process simple, does not need special processing units, and meanwhile, the cheap and market ample supply of goods of the prices of raw and semifnished materials of the present invention, therefore, Productive statistics is little, with low cost.
4, the present invention is compared with like product of the prior art, when identical water-cement ratio, adopt JTG/T F50-2011 " highway bridge construction technical specifications " test, not only addition content low by 8 ~ 10%, exceed 2.8MPa without bleeding layering, high workability, micro-expansibility but also 7d folding strength, ultimate compression strength exceeds 15 MPa, 28d folding strength exceeds 3.0MPa, and ultimate compression strength exceeds 26.4 MPa(see table 2); Good stability of the present invention simultaneously, can standing storage (at least more than 6 months).
Table 2
5, because the present invention does not introduce containing Cl
-salt, therefore, greatly reduce the probability of steel bar corrosion, and nonirritant, workmen and cement mud-jack body performance had no adverse effects.
6, the present invention can be used for post stretching the duct grouting of bonding prestress bridge and Equipment Foundations, anchor pole grouting; Also can be used for the grouting of large-sized prestress structure simultaneously.
Embodiment
embodiment 1environment-friendly high-efficiency grouting agent, it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 1.6g, methylcellulose gum 0.2g, poly carboxylic acid series water reducer 22g, UEA swelling agent 134g, ultra tiny calcium powder dirt 80g, gas ash 64g.
embodiment 2environment-friendly high-efficiency grouting agent, it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 1.8g, methylcellulose gum 0.4g, poly carboxylic acid series water reducer 20g, UEA swelling agent 136g, ultra tiny calcium powder dirt 85g, gas ash 57g.
embodiment 3environment-friendly high-efficiency grouting agent, it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 2.0g, methylcellulose gum 0.6g, poly carboxylic acid series water reducer 18g, UEA swelling agent 138g, ultra tiny calcium powder dirt 90g, gas ash 50g.
embodiment 4environment-friendly high-efficiency grouting agent, it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 2.2g, methylcellulose gum 0.8g, poly carboxylic acid series water reducer 16g, UEA swelling agent 140g, ultra tiny calcium powder dirt 95g, gas ash 43g.
embodiment 5environment-friendly high-efficiency grouting agent, it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 2.4g, methylcellulose gum 1.0g, poly carboxylic acid series water reducer 14g, UEA swelling agent 142g, ultra tiny calcium powder dirt 100g, gas ash 36g.
Above-mentioned
embodiment 1 ~ embodiment 5in, water-reducing rate>=35% of poly carboxylic acid series water reducer.Sodium laurylsulfonate, methylcellulose gum are technical grade.UEA swelling agent is commercially available finished product.
Ultra tiny calcium powder dirt refers to the raw material dust and high-temperature zone intense reaction and the particulate footpath dry gas cleaning produced and the product obtained that carry out along with coal gas in blast furnace ironmaking process.
Gas ash is the movement of blast furnace ironmaking.In blast furnace ironmaking process, impurity contained in iron ore, as lead, zinc etc. are reduced, and at high temperature forms steam, outside being come out of the stove by band with blast furnace gas together with the fine dust of ore, coke, flux etc., then by the coal gas dust removal purification system outside stove, it is caught and remove.The dry type grain dust adopting dry gas cleaning to obtain is called gas ash (blast-furnace dust, gently ash).Its grain diameter is≤content requirement >=90% of 0.076mm more than.
Claims (1)
1. environment-friendly high-efficiency grouting agent, is characterized in that: it is mixed rear obtained by the raw material of following quality: sodium laurylsulfonate 1.6 ~ 2.4g, methylcellulose gum 0.2 ~ 1.0g, poly carboxylic acid series water reducer 14 ~ 22g, UEA swelling agent 134 ~ 142g, ultra tiny calcium powder dirt 80 ~ 100g, gas ash 36 ~ 64g; Water-reducing rate >=35% of described poly carboxylic acid series water reducer; Described ultra tiny calcium powder dirt refers to the raw material dust and high-temperature zone intense reaction and the particulate footpath dry gas cleaning produced and the product obtained that carry out along with coal gas in blast furnace ironmaking process; The grain diameter of described gas ash is≤content requirement >=90% of 0.076mm more than.
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| CN201410084851.9A CN103833260B (en) | 2014-03-10 | 2014-03-10 | Environment-friendly high-efficiency grouting agent |
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| CN201410084851.9A CN103833260B (en) | 2014-03-10 | 2014-03-10 | Environment-friendly high-efficiency grouting agent |
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| CN103833260B true CN103833260B (en) | 2015-10-21 |
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| CN106242345A (en) * | 2016-07-19 | 2016-12-21 | 甘肃智通科技工程检测咨询有限公司 | A kind of nanometer base cement modifier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052697A (en) * | 2004-11-11 | 2007-10-10 | 电气化学工业株式会社 | Composition for ground-improving material, grouting material comprising the same, and method of using the same |
| CN101058494A (en) * | 2006-04-23 | 2007-10-24 | 柳州欧维姆机械股份有限公司 | CA mortar dry powder for plate-type slag-free orbit |
| CN101519288A (en) * | 2009-04-03 | 2009-09-02 | 南京瑞迪高新技术公司 | Special additive for underwater undispersed shrinking-free grouting material |
| CN103288378A (en) * | 2013-05-14 | 2013-09-11 | 河北工业大学 | Novel prestressed duct grouting agent and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59158900A (en) * | 1983-02-25 | 1984-09-08 | 日本ユピカ株式会社 | Grouting material for fixing lock bolt |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052697A (en) * | 2004-11-11 | 2007-10-10 | 电气化学工业株式会社 | Composition for ground-improving material, grouting material comprising the same, and method of using the same |
| CN101058494A (en) * | 2006-04-23 | 2007-10-24 | 柳州欧维姆机械股份有限公司 | CA mortar dry powder for plate-type slag-free orbit |
| CN101519288A (en) * | 2009-04-03 | 2009-09-02 | 南京瑞迪高新技术公司 | Special additive for underwater undispersed shrinking-free grouting material |
| CN103288378A (en) * | 2013-05-14 | 2013-09-11 | 河北工业大学 | Novel prestressed duct grouting agent and preparation method thereof |
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