CN103043938A - Impermeable micro composite particles of concrete - Google Patents
Impermeable micro composite particles of concrete Download PDFInfo
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- CN103043938A CN103043938A CN2013100316279A CN201310031627A CN103043938A CN 103043938 A CN103043938 A CN 103043938A CN 2013100316279 A CN2013100316279 A CN 2013100316279A CN 201310031627 A CN201310031627 A CN 201310031627A CN 103043938 A CN103043938 A CN 103043938A
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Abstract
The invention relates to an additive of pouring concrete, and in particular relates to impermeable micro composite particles. The impermeable micro composite particles are prepared by wrapping polyurethane in a plastic shell which is prepared from polystyrene, and the usage amount of the impermeable micro composite particles accounts for 0.05 to 3 percent of the total weight of each cubic meter of concrete. By adopting the impermeable micro composite particles, newly-poured concrete has high impermeability, and after the poured concrete is used for a number of years, fine cracks are generated in the poured concrete, and the concrete is impermeable. The newly-poured concrete takes the micro composite particles as part of fine aggregates of the concrete, and the micro composite particles have a water impermeable characteristic and can solve the quality problem caused by continuous bubbles or leakiness during pouring, so that the concrete after pouring has certain impermeability; and when the fine cracks are generated in the concrete after the pouring is finished for a number of years, and when the fine cracks pass through the micro composite particles, the shell of the concrete is ruptured to result in that a caking agent oozes out to block the cracks so as to fulfill the aim that the concrete has an impermeable function before and after pouring.
Description
Technical field
The present invention relates to a kind of casting concrete admixture, a kind of specifically have an impervious miniature composite particles.
Background technology
At present, for concrete works arranged dividing of normal concrete and water-tight concrete, water-tight concrete is divided into P6, P8, P10, P12 by impervious pressure difference.Water-tight concrete improves pore texture by improving concrete degree of compactness, thereby reduces infiltration lane, improves impervious.Way commonly used is to mix the research work of air entrained type admixture, makes inside concrete produce disconnected bubble, blocks capillary channel, changes pore texture, thereby improves concrete impermeability.In addition, reduce water cement ratio, select the cement of suitable kind and strength grade, guarantee construction quality, notice that particularly vibration compacting, maintenance fully wait, all play an important role to improving anti-permeability performance.
Water-proof concrete is density, hydrophobic nature and the impermeability of adjusting mix proportion, mixing the methods raisings self such as admixture or use new types of Cernent, makes it satisfy impervious pressure greater than the watertightness concrete of 0.6MPa.Concrete impermeability represents with impervious grade (P) or permeability coefficient.China's standard adopts impervious grade.Impervious grade is with the 28d standard specimen in the length of time, and the maximum water pressure that can bear when testing by standard test methods is determined.The maximum water pressure that GB 50164 " Standard for quality control of concrete " can bear when the impermeability test according to concrete sample, concrete impervious grade classification is five grades such as P4, P6, P8, P10, P12.
Water-proof concrete only is to have impervious effect for newly building the concrete of finishing, but after the several years of coming into operation, the situation that produces minute crack because of settlement of foundation, concrete autogenous shrinkage or expansion, microearthquake, local explosion inside concrete that concussion causes just seems at a loss what to do, above-mentioned water-proof concrete then is as good as with common concrete, therefore at present do not play a part imperviously, construction technology comes into operation infiltration that the later stage produces all without good countermeasure for concrete works.And produce the crack and seep water for concrete is local, present common restorative procedure then is slip casting, very simple of the principle of slip casting, and its principle can be by injecting Chemical Felter with a finedraw blocking-up that runs through infiltration, thereby play the effect of leak stopping.
The present invention then is the principle that combines slip casting, the method of repairing infiltration is applied directly in the water seepage resistant engineering of young concrete, so that this kind water-tight concrete can also can play iris action because of the infiltration due to the minute crack for the later stage, thereby reach water-tight concrete truly.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and have good impermeability newly building the concrete of finishing, build finish use after the several years inside concrete to produce minute crack also can be impervious.
To achieve the above object, the present invention has adopted following technical scheme: a kind of concrete impervious miniature composite particles, its structure is made by parcel polyurethane(s) in the made plastic casing that forms of polystyrene, and usage quantity is to account for 0.05% ~ 3% of concrete gross weight in its every cube concrete.
Above-mentioned polyurethane(s) presents liquid state.
Its outside surface of above-mentioned plastic casing is crude, and diameter is 2 ~ 5mm.
Beneficial effect of the present invention: realized newly building and had good impermeability on the concrete of finishing, build finish use the several years after inside concrete produce the purpose that minute crack also can be impervious.Newly build the concrete finished with miniature composite particles as concrete parts of fine aggregate, the miniature composite particles of this kind has impermeable characteristic, therefore the quality problems that eakiness in the time of intercepting because of continuous bubble or build is brought have certain impermeability after finishing building; Build to finish after the several years when inside concrete and produce minute crack, when minute crack its during through miniature composite particles, its shell causes binding agent to ooze out because of breaking, thereby blocks the purpose that all has impervious effect that front and back are realized building in the crack.
Embodiment
Principle of the present invention is: miniature composite particles shell is to form by frangible polystyrene is made, and internal package has liquid polyurethane(s) engineering waterproofing binding agent, after concrete works uses the several years, because of settlement of foundation, concrete autogenous shrinkage or expansion, microearthquake, when local explosion inside concrete that concussion causes produces the situation generation of minute crack, the shearing that the minute crack of its generation is brought can be torn miniature composite particles shell, namely cause inner polyurethane(s) engineering waterproofing binding agent to ooze out after tearing, the polyurethane(s) that oozes out can pour into along minute crack, because of the minute crack attaching space so that polyurethane(s) sclerosis, thereby so that infiltration comprehensively controlled.
Embodiment 1: diameter is the miniature composite particles 30kg of 3mm, the cement 341kg of a class strength grade 42.5, and medium sand 691kg, stone 1229kg adds entry 180kg after water reducer 10kg mixes again, carries out uniform stirring.
Such as the following table 1-1 concrete crushing strength test record sheet that to be the present invention form with the configuration of embodiment 1 proportioning, from table 1-1, show the concrete bulk strength not to be consisted of impact after adding the miniature composite particles 30kg that diameter is 3mm.
Such as the following table 1-2 concrete impervious ability test record that to be the present invention form with the configuration of embodiment 1 proportioning, show that from table 1-2 the impermeability that adds behind the miniature composite particles 30kg that diameter is 3mm concrete early stage is respond well.
As the following table 1-3 concrete that to be the present invention form with the configuration of embodiment 1 proportioning through maintenance after 28 days with apparatus shatter (the moment pressure that shatters: the impermeability test record sheet 52.75Mpa), from table 1-3, show add behind the miniature composite particles 30kg that diameter is 3mm respond well to the impermeability of later concrete (minute crack occurring).
Embodiment 2: diameter is the miniature composite particles 40kg of 3mm, the cement 442kg of a class strength grade 42.5, and medium sand 600kg, stone 1219kg adds entry 180kg after water reducer 12kg mixes again, carries out uniform stirring.
Such as the following table 2-1 concrete crushing strength test record sheet that to be the present invention form with the configuration of embodiment 2 proportionings, from table 2-1, show the concrete bulk strength not to be consisted of impact after adding the miniature composite particles 40kg that diameter is 3mm.
Such as the following table 2-2 concrete impervious ability test record that to be the present invention form with the configuration of embodiment 2 proportionings, show that from table 2-2 the impermeability that adds behind the miniature composite particles 40kg that diameter is 3mm concrete early stage is respond well.
As the following table 2-3 concrete that to be the present invention form with the configuration of embodiment 1 proportioning through maintenance after 28 days with apparatus shatter (the moment pressure that shatters: the impermeability test record sheet 64.31Mpa), from table 2-3, show add behind the miniature composite particles 40kg that diameter is 3mm respond well to the impermeability of later concrete (minute crack occurring).
Comprehensive above-mentioned two embodiment can conclude: finish early stage for concrete placement, it adds miniature composite particles the concrete bulk strength is not consisted of impact, and anti-permeability strength is obviously than not adding good that miniature composite particles comes; Finish the later stage (use several years, minute crack appears in inside) for concrete placement, very strong of its impermeability only can be reduced by 2 ranks of original impervious grade generally speaking, but still be satisfied seepage resistance demand.Therefore, the present invention has overcome concrete product causes seepage because of crack problem problem, the Chemical Felter that its miniature composite particles flows out after inside concrete breaks can be repaired damaged minute crack at once, its principle is just as the skin of human body, in case the blood that skin injury flows out condenses at once, organizing of self repaired breakage at once after one period date.
Need to prove in addition and allly conceive equivalence or simple variation that described structure, feature and principle do according to patent of the present invention, include in protection scope of the present invention.
Claims (3)
1. concrete impervious miniature composite particles, its structure is made by parcel polyurethane(s) in the made plastic casing that forms of polystyrene, and usage quantity is to account for 0.05% ~ 3% of concrete gross weight in its every cube concrete.
2. a kind of concrete impervious miniature composite particles according to claim 1 is characterized in that described polyurethane(s) presents liquid state.
3. a kind of concrete impervious miniature composite particles according to claim 1 is characterized in that its outside surface of described plastic casing is crude, and diameter is 2 ~ 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100316279A CN103043938A (en) | 2013-01-28 | 2013-01-28 | Impermeable micro composite particles of concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100316279A CN103043938A (en) | 2013-01-28 | 2013-01-28 | Impermeable micro composite particles of concrete |
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| CN103043938A true CN103043938A (en) | 2013-04-17 |
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| CN2013100316279A Pending CN103043938A (en) | 2013-01-28 | 2013-01-28 | Impermeable micro composite particles of concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113264716A (en) * | 2021-06-07 | 2021-08-17 | 泉州永盛工程质量检测有限公司 | Road repairing asphalt mixture and construction method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1684925A (en) * | 2002-09-30 | 2005-10-19 | 默克专利股份有限公司 | Method for producing inverse opaline structures |
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2013
- 2013-01-28 CN CN2013100316279A patent/CN103043938A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1684925A (en) * | 2002-09-30 | 2005-10-19 | 默克专利股份有限公司 | Method for producing inverse opaline structures |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113264716A (en) * | 2021-06-07 | 2021-08-17 | 泉州永盛工程质量检测有限公司 | Road repairing asphalt mixture and construction method thereof |
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Application publication date: 20130417 |