CN106746880A - A kind of high-performance permeable concrete cementing agent and its application - Google Patents
A kind of high-performance permeable concrete cementing agent and its application Download PDFInfo
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- CN106746880A CN106746880A CN201611123238.9A CN201611123238A CN106746880A CN 106746880 A CN106746880 A CN 106746880A CN 201611123238 A CN201611123238 A CN 201611123238A CN 106746880 A CN106746880 A CN 106746880A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of high-performance permeable concrete cementing agent, its each raw material is by mass percentage：Reactive silica Si powder 68%~72%, interface modifier 18%~22%, water reducer 7%~10%, adjustable solidification agent 2%~4%, thickener 0~2%.Pervious concrete cementing agent of the present invention can significantly extend its construction operation time in mixing pervious concrete, increase its resistance to compression, rupture strength, increase coefficient of permeability.
Description
Technical field
The invention belongs to pervious concrete additive agent field, and in particular to a kind of high-performance permeable concrete cementing agent and
Its application.
Background technology
The hardened ground design of traditional urban road, square is primarily upon the technical performance indexs such as its durability and vision
The requirement of aesthetic, thus it is substantial amounts of mated formation using non-permeable, but there is obvious ecological environment in this flooring mode
Defect, for example：(1) road surface is waterproof, and rainwater is blocked to the supplement of underground water, causes the level of ground water in city to be difficult to back
Rise；(2) rainwash is also easy to produce in rainy season, a large amount of urban pollutants can be directly discharged to local river with rainwater through pipeline
In, cause secondary pollution；(3) heat that hard surface absorbs, stores and reflect the sun, raises ground mean temperature, i.e. shape
Into " tropical island effect " in city.In addition, hard surface can also make some interdepend growing plants group and faunistic ecologies
Space is separated, also totally unfavorable to the natural ecological environment in protection city.
The internal structure of pervious concrete pavement is a series of bone formed by loose structures being connected with extraneous air
Frame composition, compared with hard surface, it has good water permeability, is building physics and the ecologies such as good sound, light, heat
Environment aspect has unique advantage, embodies the theory of " with Harmonizing with Environment ", is also the main building that " sponge city " is built
Material.China will just have started the research to pervious concrete in the end of the year in last century 70, but because intensity and endurance quality are undesirable,
Centre stopped a period of time.Until 2014, the firmly portion's of building issue《On printing and distributing sponge urban construction technical manual --- low shadow
Ring the notice that exploitation storm-water system builds (tentative)》(building city letter (2014) 275), it is permeable mixed under national policy guiding
Solidifying soil has welcome fast-developing period again.
Due to there is substantial amounts of intercommunicating pore inside pervious concrete, coefficient of permeability is difficult to take into account with intensity.At present, meeting
Under coefficient of permeability, the compression strength of domestic pervious concrete pavement is generally less than 30.0MPa, and rupture strength is less than 5.0Mpa, main
The underloading road surfaces such as pavement, landscape road, parking lot are used in, the application in Supporting Load Pavement is few.It is permeable to improve
The intensity of concrete, occurs in that some cementing agent products on the market at present, point organic (such as publication number：CN103524085B
Chinese patent) and inorganic (such as publication number：The Chinese patent of CN105819724A) two kinds, but there is its and intrinsic lack
Point.Though such as organic cementing agent enhancing effect preferably, price is higher and due to the poor caused pervious concrete of alkali resistance
The problem of durability；Though inorganic cementing agent price is relatively low, pervious concrete durability preferable, enhancing effect is not obvious.
The content of the invention
The technical problems to be solved by the invention are directed to the deficiency of prior art presence and provide a kind of high-performance permeable
Concrete cementing agent, it with enhancing effect and lasting effect, can dramatically increase pervious concrete coefficient of permeability and resistance to compression,
Rupture strength.
The present invention for technical scheme that solution technical problem set forth above is used for：
A kind of high-performance permeable concrete cementing agent, primary raw material includes reactive silica Si powder, interface modifier, subtracts
Aqua, adjustable solidification agent, thickener, each raw material is by mass percentage：Reactive silica Si powder 68%~72%, interface modification
Agent 18%~22%, water reducer 7%~10%, adjustable solidification agent 2%~4%, thickener 0~2%.
By such scheme, SiO in the reactive silica Si powder2Content is not less than not less than 92%, 28d activity indexs
100%, specific surface area is not less than 18000m2/kg。
By such scheme, the interface modifier is polyvinyl acetate based polymer, acrylic acid series polymeric compounds, styrene
One or more in based polymer etc..Wherein, the polyvinyl acetate based polymer be powdery vinyl acetate homopolymer,
Powdery vinylacetate-ethylene copolymer, powdery vinylacetate-vinyl versatate copolymer, powdery vinyl acetate
Ester-ethene-vinyl versatate copolymer, powdery vinylacetate-acrylate-vinyl versatate copolymer, powder
Shape vinylacetate-ethene-acrylate copolymer, powdery vinylacetate-ethene-methylmethacrylate copolymer
One or more in.The acrylic acid series polymeric compounds are powdery acrylate copolymer, powdery acrylate-styrene
One or two in copolymer.The styrenic is selected from powdery styrene-butadiene copolymer etc..
By such scheme, the water reducer is selected from early-strength powdery polycarboxylic acid high efficiency water reducing agent, retardation setting type powdered fat race
One kind in high efficiency water reducing agent etc..Wherein, the water-reducing rate of the early-strength powdery polycarboxylic acid high efficiency water reducing agent is not less than 25%, institute
The water-reducing rate for stating retardation setting type powdered fat race high efficiency water reducing agent is not less than 20%.
By such scheme, the adjustable solidification agent is inorganic phosphate, lignosulfonates, hydroxycarboxylate, inorganic zinc salt etc.
One or more in salt.Wherein, the inorganic phosphate is selected from sodium tripolyphosphate, sodium pyrophosphate, ammonium dihydrogen phosphate, phosphoric acid
Sodium etc..The lignosulfonates are selected from sodium lignin sulfonate, calcium lignosulfonate etc..The hydroxycarboxylate is selected from citric acid
Sodium, sodium tartrate, sodium gluconate etc..The zinc salt is selected from zinc chloride, zinc sulfate, zinc carbonate, zinc nitrate etc..
By such scheme, the thickener is cellulose thickener.It is fine that the cellulose thickener is selected from methylol
Dimension element, hydroxyethyl cellulose, hydroxypropyl methyl cellulose etc..
The preparation method of high-performance permeable concrete cementing agent of the present invention, by raw material proportioning of the present invention, by work
Property SiO 2 powder put into high-speed mixer, add interface modifier, under the conditions of 20 ± 2 DEG C mixed at high speed is uniform,
Then water reducer, adjustable solidification agent, thickener are sequentially added, then mixed at high speed is uniformly made finished product under the conditions of 20 ± 2 DEG C.
When high-performance permeable concrete cementing agent of the present invention is used, need to only be pressed according to the strength grade of pervious concrete
It is adapted to volume to mix, volume is in 6%~10% (mass percent) under normal circumstances.
High-performance permeable concrete comprising adhesive of the present invention is also within protection scope of the present invention.
Compared with prior art, what the present invention was obtained has the beneficial effect that：
Pervious concrete cementing agent of the present invention with reactive silica Si powder and interface modifier as material of main part, and
Add the auxiliary agents such as water reducer, adjustable solidification agent and thickener.Wherein, the reactive silica Si powder that (1) present invention is used, can be with slurry bone
There is secondary reaction of hydration generation hydrated calcium silicate gel in the calcium hydroxide that " transition region " interior hydrated cementitious are produced, increased " mistake
Cross area " consistency.In addition, the high-alkali hydrated calcium silicate that silica can also be produced with cement early hydration further occurs instead
Low alkali hydrated calcium silicate, the raising of these early strengths for being conducive to pervious concrete and later stage endurance quality should be generated.⑵
The interface modifier that the present invention is used, disperses film forming in cement hydration process, and as the second binding agent and the first binding agent
Cement be combined with each other, and forms the mixture with low alkali hydrated calcium silicate IPN.In addition, in polymer molecule (i.e. interface modifier)
Active group can also with active silica generate low alkali hydrated calcium silicate in Ca2+、Al3+Deng generation cross-linking reaction, shape
Acted on into special bridged bond, increased the intensity of hardening of cement slurry so that slurry bone " transition region " is finer and close, pervious concrete
Mechanical property improved.(3) the adjustable solidification agent that the present invention is used, by postponing the hydration reaction of cement, can significantly extend permeable
The construction operable time of concrete, effectively prevent the secondary situation about adding water of job site workman and occurs.(4) the present invention is used
Thickener, there is strong aquation by moisture in the macromolecular chain with hydroxyl, with cement slurry, or pass through
The winding of molecule interchain, increases the viscosity of cement slurry, so as to reduce the rheological property of cement slurry, increases its permeable system
Number.
Pervious concrete cementing agent of the present invention can significantly extend its construction operation time in mixing pervious concrete, carry
Its resistance to compression high, rupture strength, increase coefficient of permeability, with preferably enhancing effect and durability.
Specific embodiment
For a better understanding of the present invention, it is with reference to the embodiment content that the present invention is furture elucidated but of the invention
Content is not limited solely to the following examples.
Embodiments of the invention need to weigh various raw materials by proportion speed, and weighing error must be less than 1%, and each raw material components are equal
Can commercially obtain.
Embodiment 1
A kind of high-performance permeable concrete cementing agent, its raw material is by mass percentage：Reactive silica Si powder
68%th, interface modifier 18%, water reducer 10%, adjustable solidification agent 2%, thickener 2%.
In the present embodiment, SiO in reactive silica Si powder2Content is 92%, 28d activity indexs 105%, specific surface area
20000m2/kg；Interface modifier by 50wt% powderies vinylacetate and ethylene copolymer (2 DEG C of MFT) and
50wt% powderies vinylacetate-ethene-vinyl versatate copolymer (2 DEG C of MFT) is composited；Diminishing
Agent is early-strength powdery polycarboxylic acid high efficiency water reducing agent, and water-reducing rate is 28%；Adjustable solidification agent is the (industry of 70wt% powderies sodium pyrophosphate
Level) and 30wt% sodium phosphates (technical grade) be composited；Thickener is carboxymethylcellulose calcium (technical grade).
Embodiment 2
A kind of high-performance permeable concrete cementing agent, its raw material is by mass percentage：Reactive silica Si powder
68%th, interface modifier 22%, water reducer 7%, adjustable solidification agent 3%, thickener 0%.
In the present embodiment, SiO in reactive silica Si powder2Content is 94wt%, 28d activity indexs 102%, specific surface
Product 18000m2/kg；Interface modifier be 60wt% powderies acrylate-styrol copolymer (5 DEG C of MFT) and
40wt% powderies acrylate copolymer (5 DEG C of MFT) is composited；Water reducer is that early-strength powdery polycarboxylic acid is high
Effect water reducer, water-reducing rate is 30%；Adjustable solidification agent is that 20wt% sodium lignin sulfonates and 80wt% sodium gluconates are composited.
Embodiment 3
A kind of high-performance permeable concrete cementing agent, its raw material is by mass percentage：Reactive silica Si powder
72%th, interface modifier 18%, water reducer 7%, adjustable solidification agent 2%, thickener 1%.
In the present embodiment, SiO in reactive silica Si powder2Content is 93wt%, 28d activity indexs 105%, specific surface
Product 20000m2/kg；Interface modifier be 70wt% powderies styrene-butadiene copolymer (2 DEG C of MFT) and
30wt% powderies vinylacetate-ethylene copolymer (2 DEG C of MFT)；Water reducer is that retarder powdered fat race is high
Effect water reducer, water-reducing rate is 24%；Adjustable solidification agent is sodium gluconate (technical grade)；Thickener is fine 50wt% carboxy methyl hydroxyethyls
The compound of dimension plain (technical grade) and 50wt% hydroxyethyl celluloses.
The preparation method of a kind of high-performance permeable concrete cementing agent by taking embodiment 1 as an example, by 68kg reactive silicas
Si powder is put into YLT -100A high-speed mixers, adds 9kg powderies vinylacetate and ethylene copolymer and 9kg powderies
Vinylacetate-ethene-vinyl versatate copolymer, mixed at high speed 30s, then sequentially adds under the conditions of 20 ± 2 DEG C
10kg early-strength powdery polycarboxylic acids high efficiency water reducing agent, 1.4kg powderies sodium pyrophosphate (technical grade) and (industry of 0.6kg sodium phosphates
Level), 2kg carboxymethylcellulose calciums (technical grade), then mixed at high speed 30s is made finished product under the conditions of 20 ± 2 DEG C.
Gained pervious concrete cementing agent finished product of the invention is a kind of powder body material azury.
Using test
High-performance permeable concrete cementing agent of the present invention when using only need to according to the strength grade of pervious concrete by
It is adapted to volume to mix, volume is 6%~10% under normal circumstances.The high-performance permeable of the gained of the embodiment of the present invention 1~3 is mixed
Application effect of the solidifying soil cementing agent in C20~C30 is as shown in table 1, and with blank sample 1~3 as a control group.Wherein pressure resistance
Degree, rupture strength test are in strict accordance with GB/T 50081-2002《Standard for test methods of mechanical properties of ordinary concrete》, permeable system
Number test is in strict accordance with CJJ/T 135-2009《Water-permeable cement concrete pavement technique code》The correlation step of appendix A is carried out.
Table 1
From above example and test data：High-performance permeable concrete cementing agent of the present invention has following excellent
Point：
(1) intensity is increased.Strength grade according to pervious concrete mixes appropriate high-performance permeable concrete of the present invention
After cementing agent, the mechanical property of pervious concrete can be obviously improved.As shown above, under equal conditions, varying strength etc.
After the pervious concrete of level mixes 2%~3% this product, 28d compression strength can increase by more than 10%, 28d rupture strengths and can increase
More than plus 40%.During use, its volume can be adjusted according to the strength conditions of pervious concrete, to reach optimal use effect
Really.
(2) water permeability is improved.As shown above, it is permeable after mixing high-performance permeable concrete cementing agent of the present invention
The coefficient of permeability of concrete is significantly increased compared with blank sample.By taking C25 as an example, the coefficient of permeability of blank sample is 2.1mm/s, and is implemented
In 3.0mm/s or so, amplification reaches more than 40% to the coefficient of permeability of example pervious concrete, water permeability be improved significantly.
(3) construction operable time is extended.Under 25 DEG C of construction environments, high-performance permeable concrete of the present invention is mixed
After cementing agent, the construction operable time of pervious concrete mixture is obviously prolonged.By taking C20 as an example, blank sample is at 25 DEG C
Under operable time be 40min, under equal conditions, the operable time of embodiment pervious concrete is in more than 60min.Thoroughly
The extension of water coagulation soil operable time can increase the flexibility of site operation personnel, be prevented effectively from the secondary situation hair for adding water
It is raw.The above is only the preferred embodiment of the present invention, it is noted that for the person of ordinary skill of the art,
On the premise of not departing from the invention design, some modifications and variations can also be made, these belong to protection of the invention
Scope.
Claims (10)
1. a kind of high-performance permeable concrete cementing agent, it is characterised in that its primary raw material include reactive silica Si powder,
Interface modifier, water reducer, adjustable solidification agent, thickener, each raw material is by mass percentage：Reactive silica Si powder 68%~
72%th, interface modifier 18%~22%, water reducer 7%~10%, adjustable solidification agent 2%~4%, thickener 0~2%.
2. a kind of high-performance permeable concrete cementing agent according to claim 1, it is characterised in that the reactive silica
SiO in Si powder2Content is not less than 100% not less than 92%, 28d activity indexs, and specific surface area is not less than 18000m2/kg。
3. a kind of high-performance permeable concrete cementing agent according to claim 1, it is characterised in that the interface modifier
It is one or more in polyvinyl acetate based polymer, acrylic acid series polymeric compounds, styrenic.
4. a kind of high-performance permeable concrete cementing agent according to claim 3, it is characterised in that the polyvinyl acetate
Ester based polymer be powdery vinyl acetate homopolymer, powdery vinylacetate-ethylene copolymer, powdery vinylacetate-
Vinyl versatate copolymer, powdery vinylacetate-ethene-vinyl versatate copolymer, powdery vinylacetate-
Acrylate-vinyl versatate copolymer, powdery vinylacetate-ethene-acrylate copolymer, powdery acetic acid second
One or more in alkene ester-ethene-methylmethacrylate copolymer；The acrylic acid series polymeric compounds are powdery acrylic acid
One or two in ester copolymer, powdery acrylate-styrol copolymer；The styrenic is powdery benzene
Ethene-butadiene copolymer.
5. a kind of high-performance permeable concrete cementing agent according to claim 1, it is characterised in that the water reducer is early
One kind in strong type powdery polycarboxylic acid high efficiency water reducing agent, retardation setting type powdered fat race high efficiency water reducing agent.
6. a kind of high-performance permeable concrete cementing agent according to claim 5, it is characterised in that the early-strength powdery
The water-reducing rate of high-efficiency water-reducing agent of poly-carboxylic acid is not less than 25%；The water-reducing rate of the retardation setting type powdered fat race high efficiency water reducing agent is not low
In 20%.
7. a kind of high-performance permeable concrete cementing agent according to claim 1, it is characterised in that the adjustable solidification agent is nothing
One or more in the salts such as machine phosphate, lignosulfonates, hydroxycarboxylate, inorganic zinc salt.
8. a kind of high-performance permeable concrete cementing agent according to claim 1, it is characterised in that the thickener is fibre
The plain class thickener of dimension.
9. a kind of preparation method of high-performance permeable concrete cementing agent, it is characterised in that first, quality hundred is pressed according to each raw material
Ratio is divided to be calculated as：Reactive silica Si powder 68%~72%, interface modifier 18%~22%, water reducer 7%~10%, tune are solidifying
Agent 2%~4%, thickener 0~2%, weigh each raw material；Then, reactive silica Si powder is mixed with interface modifier
It is even, sequentially add water reducer, adjustable solidification agent, thickener and be well mixed, obtain high-performance permeable concrete cementing agent finished product.
10. the high-performance permeable concrete of cementing agent described in claim 1 is included.
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| CN201611123238.9A CN106746880A (en) | 2016-12-08 | 2016-12-08 | A kind of high-performance permeable concrete cementing agent and its application |
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| CN201611123238.9A CN106746880A (en) | 2016-12-08 | 2016-12-08 | A kind of high-performance permeable concrete cementing agent and its application |
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Cited By (3)
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|---|---|---|---|---|
| CN108275909A (en) * | 2018-02-08 | 2018-07-13 | 韶关学院 | A kind of cement base porous pavement meterial additive and its application |
| CN110054472A (en) * | 2019-05-27 | 2019-07-26 | 长沙如洋环保科技有限公司 | A kind of high osmosis pervious concrete cementing agent |
| CN113024175A (en) * | 2021-04-22 | 2021-06-25 | 广东省水利水电第三工程局有限公司 | Pervious concrete and preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108275909A (en) * | 2018-02-08 | 2018-07-13 | 韶关学院 | A kind of cement base porous pavement meterial additive and its application |
| CN110054472A (en) * | 2019-05-27 | 2019-07-26 | 长沙如洋环保科技有限公司 | A kind of high osmosis pervious concrete cementing agent |
| CN110054472B (en) * | 2019-05-27 | 2022-01-04 | 浙江衢州鼎盛建材有限公司 | High-permeability pervious concrete cementing agent |
| CN113024175A (en) * | 2021-04-22 | 2021-06-25 | 广东省水利水电第三工程局有限公司 | Pervious concrete and preparation method and application thereof |
| CN113024175B (en) * | 2021-04-22 | 2021-10-29 | 广东省水利水电第三工程局有限公司 | Pervious concrete and preparation method and application thereof |
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Application publication date: 20170531 |