CN106565125A - WHDF-G type pumping aid suitable for super high-rise concrete - Google Patents
WHDF-G type pumping aid suitable for super high-rise concrete Download PDFInfo
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- CN106565125A CN106565125A CN201611012453.1A CN201611012453A CN106565125A CN 106565125 A CN106565125 A CN 106565125A CN 201611012453 A CN201611012453 A CN 201611012453A CN 106565125 A CN106565125 A CN 106565125A
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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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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a WHDF-G type pumping aid suitable for super high-rise concrete. The WHDF-G type pumping aid is composed of the following components including, by weight, 15%-20% of a crystallization stimulation component, 7%-13% of an active stimulation component, 9%-15% of a tricalcium aluminate restraining component, 6%-13% of a workability adjusting component, 3%-9% of a water retention component, 3%-9% of a delayed coagulation component, 2%-6% of an anti-microorganism component and 30%-40% of water. The WHDF-G type pumping aid suitable for the super high-rise concrete has good workability, pumping performance and self-compaction performance, the mechanical property and the deformation performance of the hardened concrete are effectively improved, and the WHDF-G type pumping aid has the effects of crack prevention, infiltration reduction and durability improving.
Description
Technical field
The invention belongs to super high-rise pumping technical field of concrete, relates particularly to a kind of WHDF types pumping admixture.
Background technology
China's communal facility building flourishes at present, and the incoordination of soil rareness and urban population aggravation is also more and more
Acutely, increasing high-rise building stands in great numbers in city.And the successful construction of high-rise building needs to lift pumped concrete
The quality of soil, the requirement to pumping admixture are also just more and more stricter.The pump concrete for being applied to high-rise building needs mobility
The slump value of good, good water-retaining property, concrete is high, and loss is little, pumpability will be got well.But pumping admixture on the market is all at present
These problem is solved well can not, the pumping admixture water-reducing effect of good fluidity is poor, it is impossible to ensure the intensity of concrete, this is to building
Building structure is a very big threat；Also it is exactly a higher cohesiveness for being required of concrete to pump concrete,
It is best state that not to be concrete pumpable just represent, the bad pump concrete of cohesiveness, and mix can be under stress
Bleeding is too many, runs into barrier or to exit, and water has been back in material below departing from mix, and pressure can not be fine
Be delivered to solid particle, therefore solid particle is immovable, causes stifled pump, construction quality problem even occurs.It is common close
Real agent is organic material, and all of organic material and concrete mineral-type materials poor compatibility, DeGrain, exist old
Change and building life problem, common compacting agent is certain to introduce water reducer composition to improve the service behaviour of concrete, and this is just
So that complicated construction technique gets up.
The content of the invention
The technical problem to be solved is a kind of WHDF-G types pumping admixture proposed for above-mentioned prior art,
Which has good workability, pumping and self-compacting ability, is effectively improved the mechanical property and morphotropism of concrete after hardening
Can, there is cracking resistance, subtract and ooze and improve durability.
The present invention solves the technical scheme that adopted of above-mentioned technical problem：
Suitable for the WHDF-G type pumping admixtures of superelevation layer concrete, its component is as follows, each component content weight percent
It is calculated as：Crystallization excites component 15-20%；Activity excitation component 7-13%；Tricalcium aluminate constituents for suppressing 9-15%；With easy regulation group
Divide 6-13%；Water-retaining component 3-9%；Slow setting component 3-9%；Preventing microorganism component 2-6%；Water 30-40%.
Described crystallization excites component for Alumen or sodium hexameta phosphate.
Described activity excitation component is semi-hydrated gypsum or Melanteritum.
Described tricalcium aluminate constituents for suppressing is boric acid or ardealite.
The described and easy component that adjusts is sodium naphthalene sulfonate or sulfamic acid sodium.
Described water-retaining component is sodium tripolyphosphate or attapulgite.
Described slow setting component is sodium tripolyphosphate or sodium metaborate.
Described preventing microorganism component is carbamide or waterglass.
The present invention WHDF-G type pumping admixtures using volume be：(post-cast strip is coagulation to the 1%-2% of concrete cement amount
Native cement amount 2.5%).
The dominant response mechanism of the present invention and the effect of each ingredient are：Crystallization in powder excite component and water and
Calcium silicates in clinker react, and form modified calcium silicate hydrate (M-C-S-H) and plug-hole deposit；Activity excitation
Component excites active addition (free calcium, SiO in concrete in flyash2And Al2O3Deng) activity, make them
With Ca (OH)2Secondary hydration is carried out, hydrated calcium silicate (C-S-H) and calcium aluminosilicate hydrate mineral (C is generated3AS2Hn)；Tricalcium aluminate
Constituents for suppressing forms a kind of complex at the aquation initial stage with part tricalcium aluminate in concrete, and (this complex is a kind of non-stable
Compound, with Ca (OH) in system2Increase and gradually decompose so that tricalcium aluminate is gradually able to aquation in the aquation later stage),
Optionally inhibit the fast hydration of aquation early stage tricalcium aluminate to react, both ensure that the abundant of dicalcium silicate and tricalcium silicate
Aquation, reduces the heat of hydration and drying shrinkage in earlier systems again；Workability adjusts component on the premise of water consumption is reduced, and improves
The mobility and caking property of concrete, it is ensured that its service behaviour；Water-retaining component is the especially strong material of water absorbing capacity, Main Function
It is the service behaviour that can keep concrete for a long time, it is ensured that its service behaviour；Slow setting component slows down the rate of setting of concrete,
Guarantee not affect site operation；Preventing microorganism component Main Function is to allow microorganism not colonize in the surface of concrete and be invaded
Erosion.
Above-mentioned effect is to increase the gel (C-S-H and M-C-S-H) in concrete system, density increase, under porosity
The cohesive force and density of drop, Behavior of Hardened Cement Paste and its aggregate interface strengthens, and produces good interfacial effect.Meanwhile, the water of early stage
Change heat and drying shrinkage decline, the service behaviour of concrete also be improved significantly.Therefore, make concrete that there is good cracking resistance to subtract to ooze
Performance.
The beneficial effects of the present invention is：The WHDF-G types pumping admixture of the present invention is by promoting hydrated cementitious degree, optimization
Hydrated product, suppresses tricalcium aluminate early stage fast hydration, reduces the effect such as early hydration heat, and the system gel of making increases, under hole
Drop, aggregate interfacial structure and the early stage heat of hydration are improved, while concrete anticracking, impervious and durability is significantly improved,
It is effectively improved the workability and pump-conveying property of concrete mix.
Description of the drawings
Fig. 1 is the picture of the cement paste divergence after mixing the WHDF-G type pumping admixtures prepared by the embodiment of the present invention；
Fig. 2 is the picture of the cement paste divergence for being not incorporated into WHDF-G type pumping admixtures；
Fig. 3 is the scanning electron microscope (SEM) photograph of the interface fracture sample after mixing WHDF-G type pumping admixtures；
Fig. 4 is the scanning electron microscope (SEM) photograph of the interface fracture sample of the cement paste divergence for being not incorporated into WHDF-G type pumping admixtures；
Fig. 5 is that the concrete test block after mixing WHDF-G type pumping admixtures soaks exterior view after 90d；
Fig. 6 is exterior view after the concrete test block immersion 90d for being not incorporated into WHDF-G type pumping admixtures.
Specific embodiment
Detailed specific description is done to the present invention with reference to specific embodiment, but protection scope of the present invention not office
It is limited to following examples.
WHDF-G type pumping admixtures provided in the present invention, WH- technological invention units " Wuhan Institute of Chemical Technology " (are now renamed
" Wuhan Engineering Univ ") English alphabet abbreviation, DF- water blockoff waterproof material codes ,-G are characterized for super high-rise pumping concrete
In, hereinafter referred to as WHDF-G.
Embodiment 1
The component and its percentage by weight of WHDF-G be：
Wherein, it is sodium hexameta phosphate that crystallization excites component, and activity excitation component is Melanteritum, and tricalcium aluminate constituents for suppressing is phosphorus
Gypsum Fibrosum, and component is easily adjusted for sodium naphthalene sulfonate, water-retaining component and slow setting component are sodium tripolyphosphate, and preventing microorganism component is urine
Acid.
WHDF-G is to form said components hybrid reaction, and its using method is together with glue during concrete-agitating
Gel material is added together.
Embodiment 2
The component and its percentage by weight of WHDF-G be：
Wherein, it is Alumen that crystallization excites component, and activity excitation component is semi-hydrated gypsum, and tricalcium aluminate constituents for suppressing is boron
Acid, it is sulfamic acid sodium that workability adjusts component, and water-retaining component is attapulgite；Slow setting component be sodium metaborate, preventing microorganism
Component is waterglass, and using method is with embodiment 1.
Embodiment 3
The component and its percentage by weight of WHDF-G be：
Wherein, it is sodium hexameta phosphate that crystallization excites component, and activity excitation component is Melanteritum, and tricalcium aluminate constituents for suppressing is phosphorus
Gypsum Fibrosum, and component is easily adjusted for sodium naphthalene sulfonate, water-retaining component and slow setting component are sodium tripolyphosphate, and preventing microorganism component is urine
Element, using method is with embodiment 1.
Embodiment 4
The component and its percentage by weight of WHDF-G be：
Wherein, it is Alumen that crystallization excites component, and activity excitation component is semi-hydrated gypsum, and tricalcium aluminate constituents for suppressing is boron
Acid, and component is easily adjusted for sulfamic acid sodium, water-retaining component is attapulgite；Slow setting component be sodium metaborate, preventing microorganism group
It is divided into carbamide, using method is with embodiment 1.
Embodiment 5
The component and its percentage by weight of WHDF-G be：
Wherein, it is sodium hexameta phosphate that crystallization excites component, and activity excitation component is Melanteritum, and tricalcium aluminate constituents for suppressing is phosphorus
Gypsum Fibrosum, and component is easily adjusted for sodium naphthalene sulfonate, water-retaining component and slow setting component are sodium tripolyphosphate, and preventing microorganism component is urine
Element, using method is with embodiment 1.
Embodiment 6
The component and its percentage by weight of WHD-G be：
Wherein, it is Alumen that crystallization excites component, and activity excitation component is semi-hydrated gypsum, and tricalcium aluminate constituents for suppressing is boron
Acid, and component is easily adjusted for sulfamic acid sodium, water-retaining component is attapulgite；Slow setting component be sodium metaborate, preventing microorganism group
It is divided into waterglass, using method is with embodiment 1.
Experimental result
With the WHDF-G type pumping admixtures of embodiment 1-6, the contrast experiment for carrying out Super High concrete water bleeding amount and the slump,
Experimental result is as follows：
1. each embodiment concrete water bleeding test is carried out
1 each embodiment concrete water bleeding result of the test of table
Test shows：The benchmark sample bleeding for not mixing WHDF-G concentrates on front 40min, reaches the 75% of total amount, due to bleeding
Concentrate, bleeding quantity is big at short notice, and mixture is easily isolated so that slump-loss is fast, yield stress, plastic viscosity and anti-
Separation property significantly declines therewith, and coarse aggregate will be separated from cement mortar, will affect the workability of fresh concrete
Energy.
The mixture bleeding process for mixing WHDF-G is slower, and within bleeding is distributed in 200min, bleeding speed is with cement water
Change speed and change, caused by this is the mechanism of action of WHDF-G, response speed is accelerated, and the gel of generation increases, filling concrete stone
In pore and aggregate interface water speed also accelerate, by gel extrude water also just increase.Bleeding speed is moderate, and concrete is mixed
Compound water conservation, function of slump protection are good, and occur without segregation phenomenon, and the plastic viscosity of fresh concrete is moderate, can make concrete mixing
Optimum range is arrived in the control of thing yield stress, with good separating resistance, therefore, mix WHDF-G and can be effectively improved concrete mixing
The service behaviour of thing.
2. each embodiment concrete slump and loss test are carried out
2 each embodiment concrete slump of table and loss experimental result
Test shows：After mixing WHDF-G, initial slump is contrasted with benchmark sample, essentially identical, but its slump-loss rate
Decline within 90-120min and within more than 20%, 120-150min, decline more than 15%.This is because after mixing WHDF-G, promoting
Enter hydrated cementitious degree, gel increases in system, water retention property is improved, therefore, the loss of the slump is also decreased.
Fig. 1 and Fig. 2 are the comparison diagram mixed with do not mix WHDF-G type pumping admixture cement paste divergences (when 5 days)；Fig. 1 tables
It is bright：After mixing WHDF-G type pumping admixtures, mix water conservation function of slump protection is good, and bleeding is moderate, does not isolate, and does not also produce crack；Fig. 2 tables
It is bright：Do not mix the mix of WHDF-G type pumping admixtures and not only bleeding but also isolated, and produce crack.
Fig. 3 and Fig. 4 are scanning electron microscope (SEM) comparison diagram mixed with do not mix WHDF-G type pumping admixtures interface fracture sample；Fig. 3 tables
Bright, after mixing WHDF-G type pumping admixtures, the transition zone loose structure of concrete and microcrack are effectively improved；Fig. 4 shows, does not mix
There is obvious microcrack and pore in the concrete interface fracture of WHDF-G type pumping admixtures.
Fig. 5 and Fig. 6 are to mix to soak surface ratio after 90d with the super high-rise pumping concrete test block for not mixing WHDF-G type pumping admixtures
Compared with；Fig. 5 shows that, after mixing WHDF-G type pumping admixtures, concrete surface is smooth, and Fig. 6 shows, does not mix WHDF-G type pumping admixtures
There is corrosion and peels off in concrete surface.
Claims (8)
1., suitable for the WHDF-G type pumping admixtures of superelevation layer concrete, it is characterised in that its component is as follows, each component content is by weight
Amount percent is calculated as：Crystallization excites component 15-20%；Activity excitation component 7-13%；Tricalcium aluminate constituents for suppressing 9-15%；With
Component 6-13% is adjusted easily；Water-retaining component 3-9%；Slow setting component 3-9%；Preventing microorganism component 2-6%；Water 30-40%.
2. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
Crystallization excites component for Alumen or sodium hexameta phosphate.
3. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
Activity excitation component is semi-hydrated gypsum or Melanteritum.
4. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
Tricalcium aluminate constituents for suppressing is boric acid or ardealite.
5. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
It is sodium naphthalene sulfonate or sulfamic acid sodium with component is easily adjusted.
6. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
Water-retaining component is sodium tripolyphosphate or attapulgite.
7. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
Slow setting component is sodium tripolyphosphate or sodium metaborate.
8. WHDF-G type pumping admixtures suitable for superelevation layer concrete according to claim 1, it is characterised in that：Described
Preventing microorganism component is carbamide or waterglass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611012453.1A CN106565125A (en) | 2016-11-17 | 2016-11-17 | WHDF-G type pumping aid suitable for super high-rise concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611012453.1A CN106565125A (en) | 2016-11-17 | 2016-11-17 | WHDF-G type pumping aid suitable for super high-rise concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299758A (en) * | 2019-08-02 | 2021-02-02 | 安徽凯越电力杆塔有限公司 | High-strength self-compacting concrete and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1357506A (en) * | 2001-11-10 | 2002-07-10 | 李乃珍 | Low slump loss concrete pumping agent |
| CN102491670A (en) * | 2011-11-22 | 2012-06-13 | 武汉工程大学 | WHDF-type water-reducing, seepage-proof and crack-resistant agent for concrete |
| CN103086635A (en) * | 2013-02-25 | 2013-05-08 | 十九冶成都建设有限公司 | Pumping agent and application thereof |
| CN103524069A (en) * | 2013-09-26 | 2014-01-22 | 中国十九冶集团有限公司 | Concrete pumping agent and preparation method and application thereof |
| JP2015054791A (en) * | 2013-09-11 | 2015-03-23 | 電気化学工業株式会社 | Continuous milling construction method using super rapid hardening grout material |
-
2016
- 2016-11-17 CN CN201611012453.1A patent/CN106565125A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1357506A (en) * | 2001-11-10 | 2002-07-10 | 李乃珍 | Low slump loss concrete pumping agent |
| CN102491670A (en) * | 2011-11-22 | 2012-06-13 | 武汉工程大学 | WHDF-type water-reducing, seepage-proof and crack-resistant agent for concrete |
| CN103086635A (en) * | 2013-02-25 | 2013-05-08 | 十九冶成都建设有限公司 | Pumping agent and application thereof |
| JP2015054791A (en) * | 2013-09-11 | 2015-03-23 | 電気化学工業株式会社 | Continuous milling construction method using super rapid hardening grout material |
| CN103524069A (en) * | 2013-09-26 | 2014-01-22 | 中国十九冶集团有限公司 | Concrete pumping agent and preparation method and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112299758A (en) * | 2019-08-02 | 2021-02-02 | 安徽凯越电力杆塔有限公司 | High-strength self-compacting concrete and preparation method thereof |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20180416 Address after: 430205, 16 floor, science and technology incubator building, Wuhan Institute of Technology, Wuhan, Hubei. Applicant after: Wuhan Tianyi new materials Co. Ltd. Address before: 430418 Wangji street, Wangji street, Xinzhou District, Wuhan, Hubei Applicant before: Wuhan Tianyi Group Co., Ltd. |
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Application publication date: 20170419 |
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