CN104556785A - Water-reducing metakaolin-based micro-expansion compacting agent and preparation method thereof - Google Patents
Water-reducing metakaolin-based micro-expansion compacting agent and preparation method thereof Download PDFInfo
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- CN104556785A CN104556785A CN201510040710.1A CN201510040710A CN104556785A CN 104556785 A CN104556785 A CN 104556785A CN 201510040710 A CN201510040710 A CN 201510040710A CN 104556785 A CN104556785 A CN 104556785A
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- metakaolin
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- reducer
- densifying agent
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Abstract
The invention relates to a water-reducing metakaolin-based micro-expansion compacting agent and a preparation method thereof. The water-reducing metakaolin-based micro-expansion compacting agent comprises components A and B, wherein the component A is prepared from the following raw materials in percentage by weight: 85%-94.5% of metakaolin, 0.5%-5% of polycarboxylate water-reducer powder and 5%-10% of gypsum; the component B is prepared from lime; and the component B accounts for 1%-5% of total mass of the component A. The water-reducing metakaolin-based micro-expansion compacting agent has the advantages that (1) the working property of the concrete is significantly improved; (2) the volume stability of the concrete is improved; and (3) the early strength of the concrete is obviously improved.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of water reducing type metakaolin base slight expansion densifying agent and preparation method thereof.
Background technology
Cement industry is typical resource, energy consumption type industry, is the serious industry of environmental pollution.And produce 1 ton of cement and need consumption 1.1 tons of Wingdales, give off nearly 1 ton of CO2.And in recent years, major industry developed countries and regions is all paid much attention to the development of green building material in the world, climate change is also for the people of other countries have beaten alarm bell.Active development utilizes high-performance supplementary cementitious material, utilizes low grog production high-quality goods, reaches and reduces energy consumption and material consumption, to reduce the negative effect to environment, walk Sustainable Development Road and have important reality and far-reaching significance for social development.
Metakaolin is a kind of Silicon-rich aluminate matter inorganic mineral, dewatered after proper temperature (500 ~ 1000 DEG C) is calcined by kaolin and formed, there is very strong pozzolanic activity, now apply in cement concrete, mortar and other cement products as active extra material.Along with building trade is to the heavy demand of high performance concrete, mineral admixture seems particularly important in preparation high performance concrete.Contrast the application present situation of each mineral admixture in cement-based material, metakaolin is with its superior performance, and the application in cement concrete has good economic benefits and bright prospects.
But metakaolin can improve high-strength concrete early strength, improve its later stage performance, these are based upon metakaolin high reactivity and just compared with on the basis of bigger serface.When preparing high performance concrete, often there are the following problems as mineral admixture for metakaolin:
1) because metakaolin has higher specific surface area (>=2300m
2/ kg) and laminate structure, water-absorbent is comparatively strong and laminate structure is unfavorable for intergranular relative movement, causes concrete work performance poor, thus affects concrete pumpability and fillibility, the concrete later stage performance of final impact;
2) because metakaolin has higher fineness, cause it to be easy to reunite, not easily disperse, thus be unfavorable for the performance of activity of metakaolin effect.Therefore, metakaolin is evenly dispersed in cement concrete and could more effectively plays its volcano ash effect and filling effect;
Singly mix metakaolin and significantly can reduce concrete serviceability, even affect normal construction.Current way is in order to ensure the concrete serviceability of mixing metakaolin, use metakaolin and water reducer individually to mix in concrete to use, this kind of way can not make metakaolin be dispersed in uniformly in cement concrete at all, more do not make good use of activity and its laminate structure characteristic of metakaolin, thus in actual application, improve the effect of concrete work performance and intensity not remarkable for this way.
For ensureing the abundant dispersion of metakaolin in concrete and enhancing, it is very necessary for carrying out modification to metakaolin.
Summary of the invention
The object of the present invention is to provide a kind of water reducing type metakaolin base slight expansion densifying agent and preparation method thereof, it can give the excellent serviceability of concrete, early strong, good volume stability.
The present invention solves the problems of the technologies described above adopted technical scheme: water reducing type metakaolin base slight expansion densifying agent, it includes the component A be made up of metakaolin, polycarboxylate water-reducer pulvis and gypsum and the B component be made up of lime, wherein, the each component concentration of described component A is metakaolin 85%-94.5%, polycarboxylate water-reducer powder 0.5%-5%, gypsum 5-10%, mass percent, described B component accounts for component A total mass 1-5%.
By such scheme, described metakaolin is kaolin behind at 500-1000 DEG C temperature lower calcination 0.5-6.0 hour of grinding cooling is obtained, wherein, and SiO in described metakaolin
2with Al
2o
3mass percentage sum>=50wt%, specific surface area>=2300m
2/ kg.
By such scheme, described polycarboxylate water-reducer molecular-weight average is 11000-15000, and the polyoxyethylene radix as one of side chain in the molecular structure of described polycarboxylate water-reducer is greater than 60.
By such scheme, described gypsum is dihydrate gypsum, CaSO wherein
42H
2o mass percentage is greater than 90%, and specific surface area is greater than 400m
2/ kg.
The preparation method of described water reducing type metakaolin base slight expansion densifying agent, it is characterized in that: the metakaolin through drying is put into wet method ceramic ball mill, then gypsum is added, polycarboxylate water-reducer obtains mixture, add water, the mass ratio of mixture and water is made to be 1:1-1:1.5, milling time is 30-60min, obtain metakaolin base active slurry, then active slurry is obtained dried powder and component A by spray-drying process, then the B component lime of massfraction 1-5% adding component A mixes and obtains microdilatancy densifying agent powder.
In water reducing type metakaolin base slight expansion densifying agent preparation process of the present invention, metakaolin under mechanical action, polycarboxylate water-reducer by physical action and chemical action partial adsorbates on the surface of metakaolin, part enters metakaolin laminate structure gap, it has two significant functions: one is that the metakaolin of agglomerated fully disperses, and two is the modifications to metakaolin particle surface.Wet method preparation process can make full use of the characteristic of metakaolin, utilize the laminate structure of metakaolin, the high efficiency water reducing agent of a part is made to enter the interlayer of metakaolin, a part is adsorbed to the surface of metakaolin, when metakaolin base guarantor can be made to mould the use of enhancing water reducer, water reducer slow releasing, has slowly-releasing diminishing and protects the characteristic of moulding.Gypsum can provide enough SO for active calcium oxide in metakaolin and aluminum oxide
4 2-, strengthened the early strength function of metakaolin by sulphate activation agent, form ettringite and improve volume stability of concrete.And CaO can form Ca (OH)
2promote cement early strength, excite metakaolin early activity further, can prevent the activeconstituents moisture absorption in microdilatancy densifying agent powder from affecting its activation plays simultaneously.
The present invention has following advantage:
1) significantly improve concrete serviceability, when in normal concrete, the volume of metakaolin is 5wt%-10wt%, when polycarboxylate water-reducer volume is 0.5%, its slump declines at about 40mm-100mm.But mix the microdilatancy densifying agent containing equal quality, its slump can improve 50mm-80mm.And because in microdilatancy densifying agent, the water reducer on metakaolin surface discharges at first, and the water reducer of metakaolin interlayer meeting slow releasing, make water reducing type metakaolin base slight expansion densifying agent have diminishing and protect the characteristic of moulding;
2) improve concrete volume stability, metakaolin, as a kind of concrete mineral admixture, due to its pozzolanic activity and micro-packing effect, can significantly reduce concrete porosity thus improve its later stage weather resistance.Water reducing type metakaolin base slight expansion densifying agent can better be dispersed in concrete due to its effective constituent metakaolin, improve the active reaction rate of the component such as metakaolin, gypsum, can greatly improve concrete compactness, thus effectively reduce volume of concrete contraction.Therefore, water reducing type metakaolin base slight expansion densifying agent can improve concrete volume stability significantly, improves concrete endurance quality;
3) concrete early strength is significantly improved, be 220mm in mortar divergence, when the volume of water reducing type metakaolin base slight expansion densifying agent is 10% of gelling material, contrast benchmark mortar, mortar 3d ultimate compression strength increases about 80%, 28d strength growth rate also can remain on more than 20%, for equal volume dry powder metakaolin, under identical flowing, its 3d rate of increase is its 3 times.Mortar can reach 49.5MPa at 7d, more than the intensity in 42.5 cement 28d length of times.This is because water reducer is to metakaolin surface modification, the macromolecule group of water reducer dissolves in water formation locus effect and metakaolin is more effectively scattered in gelling material, fully make metakaolin be dispersed in concrete, concrete early strength can be significantly improved.
Accompanying drawing explanation
Fig. 1 is the mortar specimen drying shrinkage figure mixing different components.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
Embodiment 1:
Water reducing type metakaolin base slight expansion densifying agent of the present invention obtains active slurry by metakaolin, polycarboxylate water-reducer powder, gypsum and water in grinding in ball grinder, then obtain dry powder by spraying dry, then in dry powder, add the lime that massfraction is 3%.
Described metakaolin is kaolin behind at 500-1000 DEG C temperature lower calcination 0.5-6.0 hour of grinding cooling is obtained, wherein, and SiO in described metakaolin
2with Al
2o
3mass percentage sum>=50wt%, specific surface area>=2300m
2/ kg; Described polycarboxylate water-reducer molecular-weight average is 11000-15000, and the polyoxyethylene radix as one of side chain in the molecular structure of described polycarboxylate water-reducer is greater than 60; Described gypsum is dihydrate gypsum, CaSO wherein
42H
2o mass percentage is greater than 90%, and specific surface area is greater than 400m
2/ kg.
Shared by metakaolin wherein in the middle of component A, polycarboxylate water-reducer powder, gypsum, mass percent is respectively: gypsum accounts for 8% of the massfraction of metakaolin.And polycarboxylate water-reducer powder accounts for the 0.5-5% of the massfraction of metakaolin.Wherein paste flowing degree experiment completes with reference to GB/T 8077-2000 " Methods for testing uniformity of concrete admixture ", the water cement ratio that wherein clean slurry adopts is 0.29, Mortar'S Flowability completes with reference to GB/T 2419-2005 " flow of cement mortar ", and wherein mortar adopts water cement ratio to be 0.5.Table 1 is that water reducing type metakaolin base slight expansion densifying agent different ratio is on the impact of cement flows degree.
Table 1 water reducing type metakaolin base slight expansion densifying agent affects cement flows degree
Can be found out the increase of the volume along with water reducing type metakaolin base slight expansion densifying agent by table 1, paste flowing degree increases gradually, and water-reducing rate increases, and along with the increasing of volume of water reducer, 30min gradual loss diminishes.Table 1 illustrates that metakaolin base slight expansion densifying agent has higher water-reducing effect, and makes the slow releasing function utilizing water reducer, makes water reducing type metakaolin base slight expansion densifying agent have diminishing and protects the characteristic of moulding.
Embodiment 2:
Using mortar specimen as investigation object, metakaolin and water reducing type metakaolin base slight expansion densifying agent are all with 6%, 8%, 10% equivalent replace gelling material configuration mortar.Wherein water reducer is polycarboxylate water-reducer pulvis.Control water cement ratio, and make experimental group have identical degree of mobilization at 220 ± 10mm according to the degree of mobilization of the mixture of GB/T2429-2005 " Test method for fluidity of cement mortar " test benchmark sample, metakaolin sample, water reducing type metakaolin base slight expansion densifying agent 1-3; According to GB/T17671-1999 " Test method for strength of hydraulic cement mortar ", with 3 days of omnipotent pressure testing machine test benchmark sample and example, 7 days and 28 days ultimate compression strength.Wherein, metakaolin 1-3 is that metakaolin and water reducer mix separately with pulvis, metakaolin in water reducing type metakaolin base slight expansion densifying agent 1-3: gypsum: polycarboxylate water-reducer (i.e. component A)=92%:6%:2%.Wherein lime accounts for 4% of component A total mass.
The intensity of table 2 mortar specimen
Table 2 illustrates: water reducing type metakaolin base slight expansion densifying agent 1-3 is for benchmark sample, and each age strength all shows obvious growth, and 3d rate of increase can up to 77.8%.With regard to contrasting the 3d intensity of equal volume metakaolin sample, strength growth rate is respectively 30%, 43.0% and 36.4%, illustrates of the present inventionly to obtain water reducing type metakaolin base slight expansion densifying agent by wet processing and have relative to the metakaolin be dry mixed and water reducer the effect of more obviously promoting the strong.
Select the proportioning of water reducing type metakaolin base slight expansion densifying agent 2, with reference to JCJ/T 70-2009 standard, all test specimens are shaping in the die trial of 3 25mm × 25mm × 280mm is placed on that temperature is 20 DEG C, relative humidity is greater than maintenance under the condition of 90%RH.Form removal is placed on that temperature is 20 DEG C, relative humidity is maintenance in the environment of 60%RH, after this surveys its 3d, 5d, 7d, 14d and 28d length respectively.
The rate of expansion following formula of test specimen calculates:
In formula: ε
t-test specimen is in the rate of expansion (%) in the t days length of time;
L
t-test specimen is in the length (mm) in the t days length of time;
L
0the datum length (mm) of-test specimen;
L
dthe length (mm) of-gauge head (namely burying nail);
Fig. 1 describes: when the volume of water reducing type metakaolin base slight expansion densifying agent is 8%, for metakaolin, microdilatancy densifying agent more can significantly reduce the dry shrinkage of mortar specimen.Illustrate that the present invention is more conducive to the volume stability of mortar.
Embodiment 3:
A kind of water reducing type metakaolin base slight expansion densifying agent wherein metakaolin: gypsum: polycarboxylate water-reducer (i.e. component A)=90%:8%:2%, lime accounts for 3% of component A total mass.
Be investigate object with concrete sample, metakaolin and water reducing type metakaolin base slight expansion densifying agent are all with 10% equivalent replace gelling material configuration concrete, and water reducer is polycarboxylic acids dehydragent.According to the slump of the mixture of GB/T 50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard " test benchmark sample and example 1; According to GB/T 50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", by 3 days, 7 days and 28 days ultimate compression strength of omnipotent pressure testing machine test benchmark sample and example.
The slump and the intensity experiment of concrete sample example 1 the results are shown in Table 3.
The table 3 concrete match ratio when slump
Table 1 describes: when in example 1, the volume of microdilatancy densifying agent is 10%, when not adding water reducer, and it is for the metakaolin of the improvement result of rheological property relative to equal volume, still obvious.Simultaneously with regard to 3d intensity, example 1 reaches 21.8% relative to the metakaolin rate of increase of equal volume, and within 28 days, strength growth rate is 35.8%.Illustrate that water reducing type metakaolin base slight expansion densifying agent is applicable to preparing the high performance concrete of early strength micro expansion.
Claims (6)
1. water reducing type metakaolin base slight expansion densifying agent, it includes the component A be made up of metakaolin, polycarboxylate water-reducer pulvis and gypsum and the B component be made up of lime, wherein, the each component concentration of described component A is metakaolin 85%-94.5%, polycarboxylate water-reducer powder 0.5%-5%, gypsum 5-10%, mass percent, described B component accounts for component A total mass 1-5%.
2. water reducing type metakaolin base slight expansion densifying agent according to claim 1, it is characterized in that: described metakaolin is kaolin behind at 500-1000 DEG C temperature lower calcination 0.5-6.0 hour of grinding cooling is obtained, wherein, SiO in described metakaolin
2with Al
2o
3mass percentage sum>=50wt%, specific surface area>=2300m
2/ kg.
3. water reducing type metakaolin base slight expansion densifying agent according to claim 1, it is characterized in that described polycarboxylate water-reducer molecular-weight average is 11000-15000, the polyoxyethylene radix as one of side chain in the molecular structure of described polycarboxylate water-reducer is greater than 60.
4. water reducing type metakaolin base slight expansion densifying agent according to claim 1, is characterized in that described gypsum is dihydrate gypsum, CaSO wherein
42H
2o mass percentage is greater than 90%, and specific surface area is greater than 400m
2/ kg.
5. the preparation method of water reducing type metakaolin base slight expansion densifying agent according to claim 1, it is characterized in that: the metakaolin through drying is put into wet method ceramic ball mill, then gypsum is added, polycarboxylate water-reducer obtains mixture, add water, the mass ratio of mixture and water is made to be 1:1-1:1.5, milling time is 30-60min, obtain metakaolin base active slurry, then active slurry is obtained dried powder and component A by spray-drying process, then the B component lime of massfraction 1-5% adding component A mixes and obtains microdilatancy densifying agent powder.
6. the preparation method of water reducing type metakaolin base slight expansion densifying agent according to claim 5, it is characterized in that: described metakaolin is kaolin behind at 500-1000 DEG C temperature lower calcination 0.5-6.0 hour of grinding cooling is obtained, wherein, SiO in described metakaolin
2with Al
2o
3mass percentage sum>=50wt%, specific surface area>=2300m
2/ kg; Described polycarboxylate water-reducer molecular-weight average is 11000-15000, and the polyoxyethylene radix as one of side chain in the molecular structure of described polycarboxylate water-reducer is greater than 60; Described gypsum is dihydrate gypsum, CaSO wherein
42H
2o mass percentage is greater than 90%, and specific surface area is greater than 400m
2/ kg.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105731943A (en) * | 2016-01-25 | 2016-07-06 | 茂名高岭科技有限公司 | Compact enhanced mortar waterproofing agent |
| CN106986573A (en) * | 2017-04-12 | 2017-07-28 | 茂名高岭科技有限公司 | A kind of metakaolin ardealite base reinforced cement base material economization agent and preparation method thereof |
| CN107512861A (en) * | 2016-06-17 | 2017-12-26 | 卡本复合材料（天津）有限公司 | A kind of new metakaolin base concrete waterproofing and anti-leakage agent |
| CN108264315A (en) * | 2016-12-30 | 2018-07-10 | 江苏苏博特新材料股份有限公司 | Controllable mortar for building of expansion and preparation method thereof |
| CN111099600A (en) * | 2019-12-31 | 2020-05-05 | 内蒙古超牌建材科技有限公司 | Production method of metakaolin with low water demand and high activity and metakaolin prepared by production method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631832A (en) * | 2003-12-23 | 2005-06-29 | 高翊杰 | Multifunctional low-alkali low-content expanding agent |
| CN1844026A (en) * | 2006-04-21 | 2006-10-11 | 华南理工大学 | A novel masonry cement |
| CN103253916A (en) * | 2013-04-15 | 2013-08-21 | 武汉理工大学 | Early strength agent for improving strength of phosphorus gypsum cement concrete and preparation method thereof |
-
2015
- 2015-01-27 CN CN201510040710.1A patent/CN104556785B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1631832A (en) * | 2003-12-23 | 2005-06-29 | 高翊杰 | Multifunctional low-alkali low-content expanding agent |
| CN1844026A (en) * | 2006-04-21 | 2006-10-11 | 华南理工大学 | A novel masonry cement |
| CN103253916A (en) * | 2013-04-15 | 2013-08-21 | 武汉理工大学 | Early strength agent for improving strength of phosphorus gypsum cement concrete and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105731943A (en) * | 2016-01-25 | 2016-07-06 | 茂名高岭科技有限公司 | Compact enhanced mortar waterproofing agent |
| CN105731943B (en) * | 2016-01-25 | 2017-12-12 | 茂名高岭科技有限公司 | A kind of closely knit enhanced mortar waterproof agent |
| CN107512861A (en) * | 2016-06-17 | 2017-12-26 | 卡本复合材料（天津）有限公司 | A kind of new metakaolin base concrete waterproofing and anti-leakage agent |
| CN108264315A (en) * | 2016-12-30 | 2018-07-10 | 江苏苏博特新材料股份有限公司 | Controllable mortar for building of expansion and preparation method thereof |
| CN106986573A (en) * | 2017-04-12 | 2017-07-28 | 茂名高岭科技有限公司 | A kind of metakaolin ardealite base reinforced cement base material economization agent and preparation method thereof |
| CN106986573B (en) * | 2017-04-12 | 2020-05-15 | 茂名高岭科技有限公司 | Metakaolin-phosphogypsum-based enhanced cement-based material shrinkage reducing agent and preparation method thereof |
| CN111099600A (en) * | 2019-12-31 | 2020-05-05 | 内蒙古超牌建材科技有限公司 | Production method of metakaolin with low water demand and high activity and metakaolin prepared by production method |
| CN111099600B (en) * | 2019-12-31 | 2021-11-26 | 内蒙古超牌新材料股份有限公司 | Production method of metakaolin with low water demand and high activity and metakaolin prepared by production method |
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