CN107056110A - A kind of metakaolin base Portland cement mortar reinforcing agent and preparation method thereof - Google Patents
A kind of metakaolin base Portland cement mortar reinforcing agent and preparation method thereof Download PDFInfo
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- CN107056110A CN107056110A CN201710212520.2A CN201710212520A CN107056110A CN 107056110 A CN107056110 A CN 107056110A CN 201710212520 A CN201710212520 A CN 201710212520A CN 107056110 A CN107056110 A CN 107056110A
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- Prior art keywords
- metakaolin
- reinforcing agent
- cement mortar
- portland cement
- modified active
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Classifications
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/383—Whiskers
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
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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
Abstract
The present invention relates to a kind of metakaolin base Portland cement mortar reinforcing agent and preparation method thereof, the reinforcing agent is 5 in mass ratio by metakaolin and modified active fiber:13 are mixed to get；The modified active fiber prepares ester exchange at phosphorus after the ardealite calcining of drying ball-milling treatment through hydro-thermal reaction, and ester exchange at phosphorus is calcined again and obtained.Metakaolin is put into batch mixer, modified active fiber is added and is mixed, incorporation time is 30 90min, mixing end obtains metakaolin base Portland cement mortar reinforcing agent.The reinforcing agent that the present invention is provided can effectively excite pozzolanic activity of the metakaolin in cement-based material, greatly improve the early strength and later strength of cement mortar, improve its surface excreting water phenomenon, reduce setting time, improve mobility, strengthen the toughness of hardening cement mortar, also have preferable improvement to the durability of cement concrete.
Description
Technical field
The invention belongs to building material technical field, and in particular to a kind of metakaolin base Portland cement mortar increases
Strong agent and preparation method thereof.
Background technology
Concrete is current most widely used architecture engineering material, and main application fields have road, bridge, water conservancy water
Electricity, industry, civil buildings and military engineering etc..The influence of the factors such as design defect and environment due to concrete itself, portion
Divide concrete that burn into alkali-aggregate reaction, freeze-thaw damage occurs, or even crack occur, have a strong impact on the stability and peace of structure
Quan Xing.Therefore, lift concrete strength, improve emphasis and focus that its durability is all research all the time.
Metakaolin is a kind of inorganic material rich in active silica-alumina mineral, by the kaolin of ball milling in proper temperature
Be dehydrated and be made after being calcined under (500-800 DEG C), with very strong pozzolanic activity, can be used to prepare compact high-strength, durability and
The concrete material of excellent anti-corrosion performance.But when individually mixing metakaolin in Portland cement mortar, in aquation
Early stage has wrapped up metakaolin particle due to hydrolysis product of cement, hinders the migration of hydrone so that the volcano of metakaolin
Grey reaction speed is slower, causes early strength to increase slower.Meanwhile, with the progress of hydration reaction and constantly disappearing for reaction product
Consumption, the basicity of system is gradually reduced, and the activity of some metakaolin, which does not have, to be excited, and how effectively to excite higher ridge
The activity of soil needs further research.
The content of the invention
The technical problems to be solved by the invention are that there is provided a kind of higher ridge for above shortcomings in the prior art
Soil matrix Portland cement mortar reinforcing agent and preparation method thereof, the reinforcing agent can effectively excite metakaolin in cement
Pozzolanic activity in sill, greatly improves the early strength and later strength of cement mortar, improves its surface excreting water phenomenon,
Setting time is reduced, improves mobility, strengthens the toughness of hardening cement mortar, the durability to cement concrete also has preferably
Improvement.
In order to solve the above technical problems, the technical scheme that the present invention is provided is：
A kind of metakaolin base Portland cement mortar reinforcing agent is provided, the reinforcing agent is by metakaolin and modification
Activated fibre in mass ratio 5:1-3 is mixed to get；
The modified active fiber prepares ardealite after the ardealite calcining of drying ball-milling treatment through hydro-thermal reaction
Whisker, ester exchange at phosphorus is calcined again and obtained.
By such scheme, the metakaolin, through ball mill ball milling 1-3 hours, and is forged by kaolin at 500-800 DEG C
1-5h is burnt to obtain.
By such scheme, the modified active Fiber Aspect Ratio is 30-90, and its preparation method is：
1) 400 mesh sieves are crossed into prior to 40-60 DEG C drying of ardealite, then ball milling, tails over less than 1%, forged then at 550 ± 50 DEG C
2h is burnt, calcined phosphogypsum is obtained；
2) by step 1) gained calcined phosphogypsum be placed in hydrothermal reaction kettle, by solid-liquid mass ratio 1:10-20 adds mixing
Solution, wherein mixed solution are by glycerine and deionized water 0.4-0.6 by volume：1 preparation is obtained, the water at 120-160 DEG C
Thermal response 1-3h, products therefrom centrifuge washing is dried to obtain ester exchange at phosphorus；
3) by step 2) gained ester exchange at phosphorus 200-600 DEG C calcine 3h, obtain modified active fiber.
The calcium sulfate crystal whiskers prepared by raw material of ardealite are often simply referred to as ester exchange at phosphorus, are a kind of environmental protection materials
Material, the features such as possessing cheap, function admirable, be widely used.Ester exchange at phosphorus prepared by hydro-thermal method is usually sulfate hemihydrate
Moisture in calcium pyroborate, easy absorption air and in water, forms dihydrate gypsum, causes before the destruction of crystal structure, therefore application
Processing must be modified.When modified ardealite whisker is applied into the mixed system of metakaolin-cement, ester exchange at phosphorus water
Change can provide Ca2+、SO4 2-, can be with the active silica-alumina substance reaction in metakaolin under the alkalescence condition of cement system
So as to excite the pozzolanic activity of metakaolin, improve the heat evolution velocity and water mudrock structure of cement, strengthen hardening cement mortar
Early stage rupture strength, improve its compression strength；Meanwhile, the anhydrous dead roasting gypsum in modified ardealite whisker can also play phosphorus stone
The microfibre characteristic of cream whisker, activeness and quietness effect is played to hardening cement mortar.
The present invention also provides the preparation method of above-mentioned metakaolin base Portland cement mortar reinforcing agent, and its step is such as
Under：Metakaolin and modified active fiber are weighed in proportion, first metakaolin is put into batch mixer, add modified active fine
Dimension is mixed, and incorporation time is 30-90min, and mixing end obtains metakaolin base Portland cement mortar reinforcing agent.
The present invention also provides above-mentioned metakaolin base Portland cement mortar reinforcing agent in Portland cement sand
Application in slurry, the volume scope of the reinforcing agent is 6-8%.
Under mechanical action, reinforcing agent modified active fiber is adsorbed in metakaolin by physical action and chemical action
Surface, into reunion metakaolin particulate interspaces, modified active fiber has two functions：One is that the metakaolin for making reunion fills
Scattered, two be that the surface of metakaolin particle is modified.
The beneficial effects of the present invention are：1st, the reinforcing agent prepared by the present invention can significantly improve Portland cement sand
The volume of metakaolin base Portland cement reinforcing agent is in the early strength and later strength of slurry, normal silicate mortar
6-8wt%, can significantly improve mortar 3d rupture strengths more than 40%, significantly improve mortar 7d rupture strengths more than 15%, and 28d
Rupture strength growth rate remains to be maintained at more than 20%.Mortar 3d compression strength more than 60% can be significantly improved, sand is significantly improved
7d compression strength more than 45% is starched, and 28d compression strength growth rates remain to be maintained at more than 25%.Because metakaolin is made
For a kind of mineral admixture, it possesses pozzolanic activity and micro-packing effect, can significantly improve concrete early strength and
Later stage durability, while activated fibre therein has played good modified effect, greatly excites the activity of metakaolin；
2nd, metakaolin base Portland cement reinforcing agent utilizes metakaolin and the common work of calcined phosphogypsum whisker
With while metakaolin pozzolanic activity is played, moreover it is possible to play the activeness and quietness effect of ester exchange at phosphorus microfibre.Partially
Kaolin has high specific surface area and fineness, with volcano ash effect and micro-packing effect, can improve coagulation after admixture
The water retention property of native mix, making the cohesion performance of cement mortar increases.When singly mixing metakaolin, in aquation early stage due to cement
Hydrated product has wrapped up metakaolin particle, hinders the migration of hydrone so that the pozzolanic reaction speed of metakaolin compared with
Slowly, early strength is caused to increase slower.Meanwhile, with the growth of reaction age, the basicity in system is gradually reduced, metakaolin
Activity can not preferably be excited.The ester exchange at phosphorus of calcining is one kind without water soluble crystal whisker of gypsum and anhydrous dead roasting gypsum
The activated fibre of whisker mixing.The atom packing of anhydrous dead roasting crystal whisker of gypsum is larger, and passage, crystal structure are not present in its lattice
More firmly, hardly occur aquation, the characteristic of fiber can be played, increase the rupture strength of hardened cement paste；And it is anhydrous can
With Ca in the lattice of molten crystal whisker of gypsum2+‐SO4 2‐‐Ca2+The parallel passage of chain is in complete desiccation, and specific surface area is larger, meets
It can strongly be absorbed water during water, be initially formed hemihydrate calcium sulfate crystal whisker, then further aquation produces SO4 2‐, sulfate is played to inclined
The stimulation effect of kaolin activity.Therefore, each age rupture strength and compression strength of hardening cement mortar can be improved.
When metakaolin and ester exchange at phosphorus are sufficiently mixed, the activity of metakaolin can be caused to obtain larger excite so that general
Logical silicate cement cement mortar possesses preferable service behaviour；
3rd, the present invention can improve the volume stability and durability of Portland cement mortar, Portland cement sand
Added in slurry after metakaolin, due to the volcano ash effect and micro-packing effect of metakaolin, it is possible to increase the densification of product
Property, so as to be effectively reduced volume contraction and improve the durability of concrete.Metakaolin base Portland cement mortar increases
The addition of strong agent, had both improved the service behaviour of Portland cement mortar, the reactivity of metakaolin is improved again, more
Advantageously reduce the volume contraction of Portland cement mortar and improve the durability of Portland cement mortar.
Brief description of the drawings
The rupture strength contrast of benchmark sample, metakaolin sample and the mortar specimen of embodiment 1,2,3 that Fig. 1 is prepared for the present invention
Figure；
Fig. 2 is the compression strength contrast of benchmark sample, metakaolin sample and the mortar specimen of embodiment 1,2,3 prepared by embodiment
Figure.
Embodiment
To make those skilled in the art more fully understand technical scheme, the present invention is made below in conjunction with the accompanying drawings into
One step is described in detail.
Metakaolin preparation method is used in the embodiment of the present invention：Kaolin was through ball mill ball milling 2 hours, and at 800 DEG C
Lower calcining 3h obtains metakaolin.
Modified active fiber producing processes used are：Raw material ardealite is dried at 45 DEG C, and the ball milling 1h in ball mill,
400 mesh sieves are crossed, are tailed over less than 1%, extracting screen underflow is 5 DEG C/min in having calcined 2h, heating rate at 550 DEG C, and natural cooling is obtained
To calcined phosphogypsum, then calcined phosphogypsum is placed in hydrothermal reaction kettle, by solid-liquid mass ratio 1:20 add mixed solution, its
Middle mixed solution is by glycerine and deionized water by volume 0.5：1 preparation is obtained, the hydro-thermal reaction 2h at 140 DEG C, gained production
Thing centrifuge washing is dried to obtain ester exchange at phosphorus, and the draw ratio of whisker is 80.32, and the synthetic ratio of whisker is 93.40%, prepared
Ester exchange at phosphorus calcine 3h at 200 DEG C, 400 DEG C and 600 DEG C respectively, obtain 200 DEG C of modified active fibers, 400 DEG C of modifications
Activated fibre and 600 DEG C of modified active fibers.
Embodiment 1
The preparation method of metakaolin base Portland cement mortar reinforcing agent, it is characterised in that：By by drying
Metakaolin is put into batch mixer, adds 200 DEG C of modified active fibers, mixing time is 30-90min, obtains metakaolin base
Portland cement mortar reinforcing agent, by mass parts, by 5 parts of metakaolins respectively with 1 part, 2 parts, 3 parts of modified active fibers
Batch mixing obtains three kinds of reinforcing agents (corresponding to 6%, 7%, 8% volume).
By three kinds of reinforcing agents obtained above respectively press 6%, 7%, 8% volume (5% metakaolin adds 1%, 2%,
3% modified active fiber) substitution cement, selection standard sand is 0.5 mortar for obtaining 6%, 7%, 8% admixture by the ratio of mud
Test specimen.
Metakaolin sample preparation method：Metakaolin replaces cement with 5% equivalent, and selection standard is husky, is 0.5 by the ratio of mud
Configure mortar.
Benchmark sample compound method is：It is 0.5 preparation by the ratio of mud by Portland cement 450g, normal sand 1350g
Cement mortar.
According to GB/T 2429-2005《Test method for fluidity of cement mortar》Test benchmark sample, metakaolin sample, implementation
The fluidity of the mixture of the reinforcing agent of example 1；According to GB/T 17671-1999《Test method for strength of hydraulic cement mortar》, with omnipotent
The anti-folding and compression strength of 3 days, 7 days and 28 days of pressure testing machine test benchmark sample and embodiment 1.
Table 1
Table 1 illustrates：For the metakaolin that it is 5% with volume that the fluidity of mortar specimen, which is compared, in embodiment 1, there is certain
Raising, most multipotency lifted to 195mm from 185mm.This illustrates metakaolin base Portland cement manufactured in the present embodiment
Mortar reinforcing agent has some improvement to service behaviour.The reinforcing agent of the present embodiment is mixed relative to benchmark sample and higher ridge
For soil sample, the anti-folding and compression strength of each age are obtained for lifting.3d, 7d and 28d rupture strength of benchmark sample is respectively
5.5MPa, 8.2MPa and 9.1MPa, compression strength are respectively 22.3MPa, 37.6MPa and 46.4MPa.Mix the increasing of the present embodiment
During strong agent, 3d, 7d and 28d rupture strength can at most reach 8.1Mpa, 10.1MPa and 11.4MPa, be lifted respectively compared with benchmark sample
47.27%, 23.17% and 25.27%；3d, 7d and 28d compression strength can at most reach 37.6Mpa, 58.5MPa and
62.2MPa, 66.82%, 44.41% and 34.05% is improved compared with benchmark sample respectively.
The volume for selecting the reinforcing agent of the present embodiment is 7%, using net slurry as object is investigated, with reference to GB/T1346-2001
《Cement normal consistency water consumption, setting time, the stability method of inspection》The assay method of middle cement setting time, is determined respectively
The reinforcing agent (volume is the substitution of the quality such as 7% cement) of benchmark sample (P.O42.5 cement), metakaolin sample and the present embodiment
Just, final setting time.
Table 2
Table 2 illustrates：The incorporation of metakaolin causes the first of slurry, final setting time all accordingly to shorten.Meanwhile, the present embodiment system
The addition of standby reinforcing agent can also further shorten the setting time of binder materials, wherein presetting period relative to benchmark sample
Speech, shortens 44min, final setting time shortens 48min.Illustrate that the present invention has certain blood coagulation enhancing effect to concrete.
Embodiment 2
The preparation method of metakaolin base Portland cement mortar reinforcing agent, it is characterised in that：By by drying
Metakaolin is put into batch mixer, adds 400 DEG C of modified active fibers, mixing time is 30-90min, obtains the higher ridge
Soil matrix Portland cement mortar reinforcing agent, by mass parts, by 5 parts of metakaolins respectively with 1 part, 2 parts, 3 parts of modified actives
Fiber batch mixing obtains three kinds of reinforcing agents (corresponding to 6%, 7%, 8% volume).When use, obtained reinforcing agent is pressed respectively
6%, 7%, 8% volume (5% metakaolin adds 1%, 2%, 3% modified active fiber) substitution cement, selection standard is husky,
It is 0.5 mortar specimen for obtaining 6%, 7%, 8% admixture by the ratio of mud.
Metakaolin sample and benchmark sample compound method be the same as Example 1.
Using method same as Example 1, with omnipotent pressure testing machine test benchmark sample and the present embodiment 6%, 7%,
3 days, the 7 days and 28 days anti-foldings and compression strength of the mortar specimen of 8% admixture.
Table 3
Table 3 illustrates：For the metakaolin that it is 5% with volume that the fluidity of mortar specimen, which is compared, in the present embodiment, there is one
Fixed raising, most multipotency are lifted to 195mm from 185mm.This illustrates that metakaolin kip manufactured in the present embodiment leads to silicate cement
Cement mortar reinforcing agent has some improvement to service behaviour.The reinforcing agent of the present embodiment is mixed relative to benchmark sample and higher
For the soil sample of ridge, the anti-folding and compression strength of each age are obtained for lifting.3d, 7d and 28d rupture strength difference of benchmark sample
For 5.5MPa, 8.2MPa and 9.1MPa, compression strength is respectively 22.3MPa, 37.6MPa and 46.4MPa.Mix the implementation case
In reinforcing agent when, 3d, 7d and 28d rupture strength can at most reach 8.3Mpa, 10.3MPa and 11.5MPa, compared with benchmark sample point
50.91%, 25.61% and 26.37% is not improved；3d, 7d and 28d compression strength can at most reach 37.4Mpa,
60.0MPa and 62.6MPa, 67.71%, 59.57% and 34.91% is improved compared with benchmark sample respectively.
The volume for selecting reinforcing agent manufactured in the present embodiment is 7%, using net slurry as object is investigated, with reference to GB/T1346-
2001《Cement normal consistency water consumption, setting time, the stability method of inspection》The assay method of middle cement setting time, respectively
(volume is the substitution water of the quality such as 7% to the reinforcing agent of measure benchmark sample (P.O42.5 cement), metakaolin sample and the present embodiment
Mud) just, final setting time.
Table 4
Table 4 illustrates：The incorporation of metakaolin causes the first of slurry, final setting time all accordingly to shorten.Meanwhile, the present embodiment
The addition of reinforcing agent can also further shorten the setting time of binder materials, the wherein presetting period for benchmark sample,
37min is shortened, final setting time shortens 43min.Illustrate that the present invention has certain blood coagulation enhancing effect to concrete.
Embodiment 3
The preparation method of metakaolin base Portland cement mortar reinforcing agent, it is characterised in that：By by drying
Metakaolin is put into batch mixer, adds 600 DEG C of modified active fibers, mixing time is 30-90min, obtains the higher ridge
Soil matrix Portland cement mortar reinforcing agent, by mass parts, by 5 parts of metakaolins respectively with 1 part, 2 parts, 3 parts of modified actives
Fiber batch mixing obtains three kinds of reinforcing agents (corresponding to 6%, 7%, 8% volume).When use, by three kinds obtained above enhancings
6%, 7%, 8% volume (5% metakaolin adds 1%, 2%, 3% modified active fiber) substitution cement, choosing are pressed in agent respectively
Take standard husky, be 0.5 mortar specimen for obtaining 6%, 7%, 8% admixture by the ratio of mud.
Metakaolin sample and benchmark sample compound method be the same as Example 1.
Using method same as Example 1, with omnipotent pressure testing machine test benchmark sample and the present embodiment 6%, 7%,
3 days, the 7 days and 28 days anti-foldings and compression strength of the mortar specimen of 8% admixture.
Table 5
Table 5 illustrates：For the metakaolin that it is 5% with volume that the fluidity of mortar specimen, which is compared, in the present embodiment, there is one
Fixed raising, most multipotency are lifted to 195mm from 185mm.The metakaolin base Portland cement mortar of this explanation embodiment 3
Reinforcing agent has some improvement to service behaviour.The reinforcing agent of the present embodiment is mixed relative to benchmark sample and metakaolin sample
For, the anti-folding and compression strength of each age are obtained for lifting.3d, 7d and 28d rupture strength of benchmark sample is respectively
5.5MPa, 8.2MPa and 9.1MPa, compression strength are respectively 22.3MPa, 37.6MPa and 46.4MPa.Mix in the implementation case
Reinforcing agent after, 3d, 7d and 28d rupture strength can at most reach 8.5Mpa, 10.5MPa and 11.7MPa, compared with benchmark sample difference
Improve 54.55%, 28.05% and 28.57%；3d, 7d and 28d compression strength can at most reach 38.5Mpa, 58.8MPa
And 63.4MPa, 72.65%, 56.38% and 36.64% is improved respectively compared with benchmark sample.
Benchmark sample, metakaolin sample and the mortar specimen (reinforcing agent of embodiment 1,2,3 prepared as shown in Figure 1 for the present invention
Volume is rupture strength comparison diagram 7%), it can be seen that relative to benchmark sample, the 3d of metakaolin sample, 7d, the anti-foldings of 28d are strong
Degree increases, and adds after reinforcing agent manufactured in the present embodiment, the 3d of mortar specimen, 7d, 28d rupture strengths are further carried
It is high.
Fig. 2 is that (reinforcing agent volume is for the present invention benchmark sample, metakaolin sample and the mortar specimen of embodiment 1,2,3 that prepare
7%) compression strength comparison diagram, again it can be seen that compression strength of the reinforcing agent manufactured in the present embodiment to mortar specimen
It is significantly improved, improvement effect is better than metakaolin.
The volume for selecting the reinforcing agent of the present embodiment is 7%, using net slurry as object is investigated, with reference to GB/T1346-2001
《Cement normal consistency water consumption, setting time, the stability method of inspection》The assay method of middle cement setting time, is determined respectively
The reinforcing agent (volume is the substitution of the quality such as 7% cement) of benchmark sample (P.O42.5 cement), metakaolin sample and the present embodiment
Just, final setting time.
Table 6
Table 6 illustrates：The incorporation of metakaolin causes the first of slurry, final setting time all accordingly to shorten.Meanwhile, the present embodiment
The addition of reinforcing agent can also further shorten the setting time of binder materials, the wherein presetting period for benchmark sample,
44min is shortened, final setting time shortens 46min, illustrate that the present invention has certain blood coagulation enhancing effect to concrete.
Claims (5)
1. a kind of metakaolin base Portland cement mortar reinforcing agent, it is characterised in that：The reinforcing agent is by metakaolin
It is 5 in mass ratio with modified active fiber:1-3 is mixed to get；
The modified active fiber prepares ester exchange at phosphorus after the ardealite calcining of drying ball-milling treatment through hydro-thermal reaction,
Ester exchange at phosphorus is calcined again and obtained.
2. metakaolin base Portland cement mortar reinforcing agent according to claim 1, it is characterised in that described inclined
Kaolin, through ball mill ball milling 1-3 hours, and is calcined 1-5h at 500-800 DEG C and obtained by kaolin.
3. metakaolin base Portland cement mortar reinforcing agent according to claim 1, it is characterised in that described to change
Property activated fibre draw ratio be 30-90, its preparation method is：
1) 400 mesh sieves are crossed into prior to 40-60 DEG C drying of ardealite, then ball milling, tailed over less than 1%, then at 550 ± 50 DEG C of calcinings
2h, obtains calcined phosphogypsum；
2) by step 1) gained calcined phosphogypsum be placed in hydrothermal reaction kettle, by solid-liquid mass ratio 1:10-20 adds mixed solution,
Wherein mixed solution is by glycerine and deionized water 0.4-0.6 by volume：1 preparation is obtained, the hydro-thermal reaction at 120-160 DEG C
1-3h, products therefrom centrifuge washing is dried to obtain ester exchange at phosphorus；
3) by step 2) gained ester exchange at phosphorus 200-600 DEG C calcine 3h, obtain modified active fiber.
4. a kind of preparation method of any described metakaolin base Portland cement mortar reinforcing agents of claim 1-3,
It is characterized in that step is as follows：Metakaolin and modified active fiber are weighed in proportion, and first metakaolin is put into batch mixer,
Add modified active fiber to be mixed, incorporation time is 30-90min, mixing end obtains metakaolin kip and leads to silicic acid
Salt solution cement mortar reinforcing agent.
5. the metakaolin base Portland cement mortar reinforcing agent as described in claim 1-3 is any is in normal silicate water
Application in cement mortar, it is characterised in that the volume scope of the reinforcing agent is 6-8%.
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| CN107500674A (en) * | 2017-09-28 | 2017-12-22 | 嘉华特种水泥股份有限公司 | A kind of environment-friendly type decoration cement |
| CN107628790A (en) * | 2017-09-28 | 2018-01-26 | 嘉华特种水泥股份有限公司 | A kind of decoration cement |
| CN107651893A (en) * | 2017-09-28 | 2018-02-02 | 嘉华特种水泥股份有限公司 | A kind of radiation proof decoration cement |
| CN108947414A (en) * | 2018-09-26 | 2018-12-07 | 济南大学 | A kind of high compact silicate cement cement mortar |
| CN115159910A (en) * | 2022-09-07 | 2022-10-11 | 广东潮泰建设有限公司 | Preparation method and application of high-strength waterproof concrete for building construction |
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