CN104276796A - High flow regime high strength crack resistant cement based grouting material - Google Patents
High flow regime high strength crack resistant cement based grouting material Download PDFInfo
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Abstract
The invention provides a high flow regime high strength crack resistant cement based grouting material comprising the following components by mass: 100 parts of sand, 60 to 70 parts of cement, 10 to 20 parts of a mineral admixture, 10 to 15 parts of steel slag powder, 0.3 to 0.7 part of a water reducing agent, 5 to 10 parts of a composite shrinkage reducing agent, 0.03 to 0.06 part of a water retaining agent, 0.1 to 0.3 part of a defoaming agent, and 0 to 0.2 part of high polymer synthetic fiber. The beneficial effects of the high flow regime high strength crack resistant cement based grouting material are that: (1) the grouting material is high in flow regime, high in strength and crack resistant; (2) the initial fluidity is greater than or equal to 340mm, the fluidity in half an hour is loss-free, the fluidity in 1h is greater than or equal to 300mm, the construction time is long; (3) the grouting material is high in strength, 1d compressive strength is greater than or equal to 20MPa, 28d compressive strength is greater than or equal to 70MPa; (4) mineral admixture technology and organic polymer technology are combined, the grouting material formulation is optimized, drying shrinkage in the late period can be well controlled and compensated, the cracking tendency is substantially reduced compared with that of a conventional ordinary type grouting material, and the volume stability performance is excellent.
Description
Technical field
The present invention relates to the high-strength cracking resistance strength cement-based grouting material of a kind of upper flow regime, compare with common grouting material, it has upper flow regime, high-strength, resistance to cleavage concurrently.
Background technology
At present, commercially available strength cement-based grouting material is all called ungauged regions or microdilatancy grouting material, but these grouting materials are in actual application, but inevitably even early stage in the middle and later periods, occur cracking phenomena.Trace it to its cause, the concept of grouting material " ungauged regions " and " microdilatancy " mainly comes from one day vertical expansion ratio and reaches relevant regulatory requirements, but in actual applications, formerly, a large amount of contractions but following closely in grouting material always microdilatancy.
GB/T50448-2008 " cement-based grouting material utilisation technology specification " one day vertical expansion ratio to grouting material has carried out relevant regulations and requirement, but, relevant regulations is not done to the volume change of the middle and later periods of grouting material.Current practical situation are, even if commercially available strength cement-based grouting material is meeting under one day vertical expansion ratio specified requirement prerequisite, its middle and later periods shrinks and but cannot be controlled, the reason place of Here it is current " ungauged regions ", " microdilatancy " grouting material still occurs in actual applications cracking phenomena.
Strength cement-based grouting material, under the ordering about of flowing property and high-strength performance, often has very a high proportion of cement mixing content in formulating of recipe, the relative normal concrete of this ratio is high a lot, and this has just buried hidden danger for grouting material in the high convergency tearing tendency of middle and later periods.The simple technique means by admixture calcium oxide, ettringite class swelling agent, can make one of grouting material day vertical expansion ratio reach requirement, but cannot improve significantly to the contraction of the middle and later periods of grouting material development of age.This also result in for many years, and strength cement-based grouting material is in construction application, and problem of Cracking still cannot be significantly improved.When in the face of large equipment basis and complex apparatus basic grouting, strength cement-based grouting material is often needed to have upper flow regime performance (initial flow degree >=340mm, the flowing property hold-time is long), and the high demand of upper flow regime grouting material to gelling material inevitably exacerbates the problems referred to above.Therefore, the strength cement-based grouting material with the high-strength resistance to cleavage of upper flow regime is researched and developed significant.
Summary of the invention
In view of the above problems, the object of the present invention is to provide the strength cement-based grouting material of a kind of upper flow regime, high-strength, cracking resistance.
According to the present invention, the high-strength cracking resistance strength cement-based grouting material of upper flow regime provided by the invention, by mass parts, comprises:
In strength cement-based grouting material of the present invention, described sand can be the good artificial sand of particle diameter 0.1mm ~ 4mm grating or natural sand;
Described cement can be silicate cement, ordinary Portland cement or its mixture;
Described mineral admixture can be flyash, slag powders or its mixture, and wherein, described flyash is I grade of flyash or II grade of flyash, and described slag powders is other slag powders of S95 higher level;
Described steel-making slag powder for meeting the steel-making slag powder of standard GB/T/T20491-2006 " steel-making slag powder in cement and concrete " related request, as specific surface area>=400m
2/ kg, free calcium oxide content≤3.0% etc.;
Described water reducer can be polycarboxylate water-reducer;
Described compound economization agent can be the mixture of ettringite class swelling agent, polyoxyethylene glycol and whiteruss, is preferably the mixture that ettringite class swelling agent, polyoxyethylene glycol mix by the mass percentage of 90%:5%:5% with whiteruss;
Described water-holding agent can be viscosity lower than the hydroxypropyl methyl cellulose ether of 10,000mPas or ethoxyl methyl cellulose ether;
Described defoamer can be silicone antifoam agent, polyether antifoam agent or mineral oil antifoam agent;
Described Polymer Synthesizing fiber can be 3 ~ 6mm polypropylene fibre or polyvinyl alcohol fiber.
Upper flow regime of the present invention high-strength cracking resistance strength cement-based grouting material can conventionally mix obtained, drops into mixing machine, mix and can obtain by each component by its mass fraction.
In use, grouting material the present invention prepared and the water based on this grouting material gross weight 11% ~ 13%, adopt stirrer mix evenly to upper flow regime grouting material, pour into Equipment Foundations the high-strength cracking resistance strength cement-based grouting material of upper flow regime of the present invention.
The 28d drying shrinkage numerical value of commercially available cement-based grouting material is after tested often more than thousandth, and tearing tendency is serious, and the requirement of upper flow regime performance and high-strength performance often can aggravate tearing tendency again.The present invention is in conjunction with the use of polycarboxylate water-reducer, slag micro powder, compound economization agent, what they were controlled the drying shrinkage of cement-based grouting material plays additive effect, the strength cement-based grouting material of upper flow regime, high-strength, resistance to cleavage is groped to obtain to have concurrently by a large amount of tests, 28d drying shrinkage numerical value can be controlled within 4/10000ths, significantly reduces tearing tendency.
Compared with prior art, beneficial effect of the present invention is: (1) this grouting material has upper flow regime, high-strength, resistance to cleavage concurrently; (2) initial flow degree >=340mm, half an hour, degree of mobilization did not lose, 1h degree of mobilization >=300mm, can the engineering time long; (3) high-strength, 1d ultimate compression strength >=20MPa, 28d ultimate compression strength >=70MPa; (4) in conjunction with mineral admixture technology and organic polymer technology, this grouting material formula is optimized, and middle and later periods dry shrinkage is well controlled and compensates, and relatively conventional coventional type grouting material significantly reduces tearing tendency, and volume stability is excellent.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, and following each embodiment is only for illustrating the present invention, and scope of the present invention is not limited in these specific embodiments.
Below in embodiment, the test of degree of mobilization and ultimate compression strength is concrete with reference to GB/T50448-2008 " cement-based grouting material utilisation technology specification ", and drying shrinkage test is with reference to JGJ/T70-2009 " building mortar basic performance tests method standard ".
embodiment 1
Get quartz sand 100kg,
Silicate cement 60kg,
Flyash (mineral admixture) 15kg,
Steel-making slag powder 10kg,
Polycarboxylate water-reducer 0.5kg,
Hydroxypropyl methyl cellulose ether (water-holding agent) 0.03kg,
Compound economization agent (ettringite class swelling agent 90wt%, polyoxyethylene glycol 5wt%, whiteruss 5wt%) 7kg,
Mineral oil antifoam agent 0.1kg,
3mm polypropylene fibre 0.1kg.
Each component is mixed in mixing machine, makes grouting material 1.
Evenly applied afterwards with 24kg water mix by this grouting material 1, its performance is as follows:
Initial flow degree 350mm; 1h degree of mobilization 310mm; 1d ultimate compression strength 22.3MPa; 28d ultimate compression strength 75.1MPa; 28d shrinking percentage 343 × 10
-6.
embodiment 2
Get quartz sand 100kg,
Silicate cement 70kg,
Flyash (mineral admixture) 10kg,
Steel-making slag powder 15kg,
Polycarboxylate water-reducer 0.5kg,
Hydroxypropyl methyl cellulose ether (water-holding agent) 0.03kg,
Compound economization agent (ettringite class swelling agent 90wt%, polyoxyethylene glycol 5wt%, whiteruss 5wt%) 10kg,
Mineral oil antifoam agent 0.1kg,
3mm polypropylene fibre 0.1kg.
Each component is mixed in mixing machine, makes grouting material 2.
Evenly applied afterwards with 24kg water mix by this grouting material 2, its performance is as follows:
Initial flow degree 345mm; 1h degree of mobilization 310mm; 1d ultimate compression strength 27.6MPa; 28d ultimate compression strength 79.1MPa; 28d shrinking percentage 333 × 10
-6.
embodiment 3
Get quartz sand 100kg,
Silicate cement 65kg,
Flyash (mineral admixture) 10kg,
Steel-making slag powder 15kg,
Polycarboxylate water-reducer 0.5kg,
Hydroxypropyl methyl cellulose ether (water-holding agent) 0.03kg,
Compound economization agent (ettringite class swelling agent 90wt%, polyoxyethylene glycol 5wt%, whiteruss 5wt%) 5kg,
Mineral oil antifoam agent 0.1kg,
6mm polypropylene fibre 0.1kg.
Each component is mixed in mixing machine, makes grouting material 3.
Evenly applied afterwards with 24kg water mix by this grouting material 3, its performance is as follows:
Initial flow degree 355mm; 1h degree of mobilization 320mm; 1d ultimate compression strength 25.1MPa; 28d ultimate compression strength 81.2MPa; 28d shrinking percentage 382 × 10
-6.
embodiment 4
Repeat embodiment 1, institute's difference is that described sand is 0.1 ~ 4mm river sand.
The grouting material prepared and 24kg water mix are evenly applied afterwards, performance is as follows: initial flow degree 350mm; 1h degree of mobilization 310mm; 1d ultimate compression strength 22.0MPa; 28d ultimate compression strength 71.3MPa; 28d shrinking percentage 349 × 10
-6.
embodiment 5
Repeat embodiment 1, institute's difference is that described defoamer is silicone antifoam agent.
The grouting material prepared and 24kg water mix are evenly applied afterwards, performance is as follows: initial flow degree 350mm; 1h degree of mobilization 310mm; 1d ultimate compression strength 20.3MPa; 28d ultimate compression strength 74.3MPa; 28d shrinking percentage 340 × 10
-6.
embodiment 6
Repeat embodiment 1, institute's difference is that described Polymer Synthesizing fiber is 6mm polyvinyl alcohol fiber.
The grouting material prepared and 24kg water mix are evenly applied afterwards, performance is as follows: initial flow degree 350mm; 1h degree of mobilization 310mm; 1d ultimate compression strength 24.3MPa; 28d ultimate compression strength 73.1MPa; 28d shrinking percentage 345 × 10
-6.
Claims (10)
1. the high-strength cracking resistance strength cement-based grouting material of upper flow regime, by mass parts, comprises:
2. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described sand is the good artificial sand of particle diameter 0.1mm ~ 4mm grating or natural sand; Described cement is silicate cement, ordinary Portland cement or its mixture.
3. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, it is characterized in that, described mineral admixture is flyash, slag powders or its mixture, wherein, described flyash is I grade of flyash or II grade of flyash, and described slag powders is other slag powders of S95 higher level.
4. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described steel-making slag powder is for meeting the steel-making slag powder of standard GB/T/T20491-2006 " steel-making slag powder in cement and concrete " related request.
5. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described water reducer is polycarboxylate water-reducer.
6. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described compound economization agent is the mixture of ettringite class swelling agent, polyoxyethylene glycol and whiteruss.
7. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 6, is characterized in that, the mixture that described compound economization agent is ettringite class swelling agent, polyoxyethylene glycol mixes by the mass percentage of 90%:5%:5% with whiteruss.
8. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described water-holding agent is viscosity lower than the hydroxypropyl methyl cellulose ether of 10,000mPas or ethoxyl methyl cellulose ether.
9. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described defoamer is silicone antifoam agent, polyether antifoam agent or mineral oil antifoam agent; Described Polymer Synthesizing fiber is 3 ~ 6mm polypropylene fibre or polyvinyl alcohol fiber.
10. the high-strength cracking resistance strength cement-based grouting material of upper flow regime according to claim 1, is characterized in that, described sand is the good artificial sand of particle diameter 0.1mm ~ 4mm grating or natural sand; Described cement is silicate cement, ordinary Portland cement or its mixture; Described mineral admixture is flyash, slag powders or its mixture, and wherein said flyash is I grade of flyash or II grade of flyash, and described slag powders is other slag powders of S95 higher level; Described steel-making slag powder is for meeting the steel-making slag powder of standard GB/T/T20491-2006 " steel-making slag powder in cement and concrete " related request; Described water reducer is polycarboxylate water-reducer; The mixture that described compound economization agent is ettringite class swelling agent, polyoxyethylene glycol mixes by the mass percentage of 90%:5%:5% with whiteruss; Described water-holding agent is viscosity lower than the hydroxypropyl methyl cellulose ether of 10,000mPas or ethoxyl methyl cellulose ether; Described defoamer is silicone antifoam agent, polyether antifoam agent or mineral oil antifoam agent; Described Polymer Synthesizing fiber is 3 ~ 6mm polypropylene fibre or polyvinyl alcohol fiber.
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Cited By (9)
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| CN106007550A (en) * | 2016-01-25 | 2016-10-12 | 湖南省建筑工程集团总公司 | Large flow pattern non-shrinkage anti-crack concrete grouting material |
| CN106830842A (en) * | 2017-03-02 | 2017-06-13 | 江世妹 | A kind of cement base perfusion mortar |
| CN107445542A (en) * | 2017-08-02 | 2017-12-08 | 美好建设有限公司 | A kind of cement base high-strength grout and its application in assembled architecture field |
| CN107721318A (en) * | 2017-11-17 | 2018-02-23 | 河北达奥达建材科技股份有限公司 | A kind of graphene cement-based grouting material |
| CN108083844A (en) * | 2017-12-13 | 2018-05-29 | 湖北大学 | Foam concrete and preparation method thereof is split in a kind of high-strength resistance |
| CN111439973A (en) * | 2020-05-14 | 2020-07-24 | 上海言诺建筑材料有限公司 | Cement-based grouting material and preparation method and application thereof |
| CN115057678A (en) * | 2022-06-20 | 2022-09-16 | 临海市忠信新型建材有限公司 | Ordinary cement-based grouting material for stabilizing bottom plate of bridge support |
| CN116496049A (en) * | 2023-05-12 | 2023-07-28 | 河北工程大学 | Cement-based grouting material for crack resistance of semi-flexible pavement, and preparation method and application thereof |
| CN117049837A (en) * | 2022-05-06 | 2023-11-14 | 江苏铭丰建材科技有限公司 | Preparation method of recycled concrete |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007550A (en) * | 2016-01-25 | 2016-10-12 | 湖南省建筑工程集团总公司 | Large flow pattern non-shrinkage anti-crack concrete grouting material |
| CN106007550B (en) * | 2016-01-25 | 2018-09-25 | 湖南省建筑工程集团总公司 | A kind of big fluidised form ungauged regions anti-crack concrete grouting material |
| CN106830842A (en) * | 2017-03-02 | 2017-06-13 | 江世妹 | A kind of cement base perfusion mortar |
| CN107445542A (en) * | 2017-08-02 | 2017-12-08 | 美好建设有限公司 | A kind of cement base high-strength grout and its application in assembled architecture field |
| CN107721318A (en) * | 2017-11-17 | 2018-02-23 | 河北达奥达建材科技股份有限公司 | A kind of graphene cement-based grouting material |
| CN108083844A (en) * | 2017-12-13 | 2018-05-29 | 湖北大学 | Foam concrete and preparation method thereof is split in a kind of high-strength resistance |
| CN111439973A (en) * | 2020-05-14 | 2020-07-24 | 上海言诺建筑材料有限公司 | Cement-based grouting material and preparation method and application thereof |
| CN117049837A (en) * | 2022-05-06 | 2023-11-14 | 江苏铭丰建材科技有限公司 | Preparation method of recycled concrete |
| CN115057678A (en) * | 2022-06-20 | 2022-09-16 | 临海市忠信新型建材有限公司 | Ordinary cement-based grouting material for stabilizing bottom plate of bridge support |
| CN116496049A (en) * | 2023-05-12 | 2023-07-28 | 河北工程大学 | Cement-based grouting material for crack resistance of semi-flexible pavement, and preparation method and application thereof |
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