CN107963853A - A kind of preparation method of durable self-cure type concrete - Google Patents
A kind of preparation method of durable self-cure type concrete Download PDFInfo
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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
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- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C04B2111/20—Resistance against chemical, physical or biological attack
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/24—Sea water resistance
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Abstract
The present invention relates to technical field of concrete preparation, and in particular to a kind of preparation method of durable self-cure type concrete.The present invention is in calcium carbonate surface loading microorganisms, the organic acid of generation and concrete neutral and alkali substance reaction, so as to form crystalline solid not soluble in water, crystalline solid constantly grows and realizes micro-cracks self-healing, so as to achieve the purpose that concrete durability, phenol enters inside Portland cement stratum granulosum, and polymerisation occurs in inside, improve the durability of concrete, calcium carbonate surface loading microorganisms, bacterial spore and nutriment are effectively filled in inside concrete hole, form self-healing property protective layer, the bacterial spore being activated, effectively bear the high alkalinity environment of concrete, be conducive to the decomposition of calcium carbonate, in the life cycle of concrete structure, crystalline solid is continuously grown, so as to reach the durability self-healing repairing effect of concrete, it is with a wide range of applications.
Description
Technical field
The present invention relates to technical field of concrete preparation, and in particular to a kind of preparation method of durable self-cure type concrete.
Background technology
Concrete is most popular construction material, and a kind of typical fragile material in the world.Using process
In can produce cracking or local damage under external force or other factors effect, cause mechanical property and endurance quality to reduce, even
It is also possible to trigger macrocrack and brittle fracture occurs, causes to be difficult to the loss retrieved to society.
At present, mainly there are two kinds for the repair materials of distress in concrete, be inorganic repair materials, organic reparation material respectively
Material.Inorganic repair materials are primarily referred to as cement base repair materials, its application range is the most extensive, technology also comparative maturity, but
Adhesive property is bad in application process;Organic repair materials be using with certain reparation characteristic organic matter as reparation host agent,
It is aided with the blending of the organic substances such as toughener, initiator and coupling agent together, makes it have the effect to distress in concrete reparation
Fruit, compared with inorganic repair materials, it is with the high characteristic of adhesion strength, but most of organic matter belongs to noxious material, makes
Should try one's best the injury avoided to the person during.The Concrete crack repair material that in the market is possessed is mostly by repairing material
Expect that the hardening of itself fills up reparations complete crack, its performance to concrete substrate itself is without the too big improvement of progress.
Built-in microorganism is current most common autogenous healing conjunction technology, the activity and alkali resistance of microorganism etc. to self-healing
Conjunction property has a great influence.In recent years, the biochemistry behavior that microorganism causes precipitation of calcium carbonate to produce receives much concern.There is scholar to point out
Microorganism makes it become a kind of suitable to fill as the precursor compound that a kind of main additive catalysis is built in concrete
Filling chock material is the dominant mechanism of microbial action crack self-healing.Microorganism self-repairing system is the reparation of concrete substrate microcrack
Effectively delay a kind of potentially hazardous high cost for providing new method, saving needed for substantial amounts of exterior reparation, and
Its security and durability are also greatly improved, and the service life of concrete will also extend.
Existing microorganism self-repairing system also has the following disadvantages:1st, part microorganism self-repairing system culture medium is outer
What boundary manually provided, selfreparing needs human intervention;2nd, the life cycle of microorganism wants long enough, suitable with concrete structure,
In the case where being directly added into microorganism, microbial activity can be subject to the overbasic suppression of concrete, the existence of spore and development energy
Power can diminish with the age of concrete elongated gap and gradually reduce, and life span is less than four months, after death microbes decomposition,
Have an impact to concrete strength;The 3rd, although substantial amounts of non-pressure three-product cyclone has little to no effect intensity, various organic-biologicals
And the presence of presoma metaplasia thing causes concrete crushing strength to reduce.
Therefore, developing a kind of self-cure type concrete that can solve above-mentioned performance issue is highly desirable.
The content of the invention
The technical problems to be solved by the invention:Long enough is wanted for the life cycle of current microorganism, with concrete knot
Structure is suitable, and in the case where being directly added into microorganism, microbial activity can be subject to the overbasic suppression of concrete, the existence of spore
It can diminish with developmental potency with the age of concrete elongated gap and gradually reduce, life span is less than four months, after death micro- life
Thing can decompose, defect influential on concrete strength, there is provided a kind of preparation method of durable self-cure type concrete.
In order to solve the above technical problems, the present invention is using technical solution as described below:
A kind of preparation method of durable self-cure type concrete, it is characterised in that specifically preparation process is:
(1)Weigh 1.0~1.2kg Portland cements to grind, abrasive flour is collected, by abrasive flour, acetone and benzene
Phenol is mixed, and obtains mixed slurry, after Silane coupling reagent KH-570 and mixed slurry are mixed, is placed in drying in baking oven
It is dry, dried object and ground 100 mesh sieve are collected, obtains modified cement granules;
(2)Weigh 6~8g dipotassium hydrogen phosphates, 4~6g potassium dihydrogen phosphates, 8~10g sucrose, 2~4g sodium chloride, 1~3g magnesium sulfate
It is mixed with 2~4g citric acids, obtains mixture, mixture and deionized water is mixed to be placed in mixer and stirred, is obtained
Self-made mixture, and the pH value of Self-made mixture is adjusted, count in parts by weight, weigh 24~36 parts of calcium carbonate and 16~20 respectively
Part Self-made mixture mixing, which is placed in fermentation tank, stirs, then adds 10~12 parts of Bacillus sphaericus bacteria suspensions, is sealed by fermentation, obtains
To tunning, fermentation-derived product, removes ferment filtrate, obtains fermentation filter residue;
(3)Lard and sesame oil are mixed, obtain miscella, continues to add 1~2 times of natural pond of mixing oil quality to miscella
Liquid, is fitted into the fermentation tank with oxygen, is sealed by fermentation and aoxidizes, and after fermentation oxidation, takes out tunning, is to be formed with certainly
Machine acid;
(4)Count in parts by weight, weigh respectively 20~30 parts of modified cement granules, 16~20 parts fermentation filter residues, 10~12 parts from
Organic acid processed and the mixing of 18~24 parts of deionized waters are placed in mixer and stir, then add 3~5 parts of flyash, 4~6 parts of rubbles,
2~4 parts of lignosulfonates, 1~3 part of cement expansive material AEA and 5~7 parts of river sands, continue to be mixed, discharging, you can are made
Durable self-cure type concrete.
Step(1)The time that grinds is 6~8min, and the mass ratio of abrasive flour, acetone and phenol is 1:2:
3, mixing time is 12~16min, and the volume ratio of Silane coupling reagent KH-570 and mixed slurry is 1:4, mixing time for 10~
12min, drying temperature are 65~75 DEG C, and drying time is 24~32min.
Step(2)The mixing time is 6~8min, and the mass ratio of mixture and deionized water is 1:4, whipping temp
For 24~28 DEG C, mixing time is 16~20min, adjust Self-made mixture pH value be 7.0~7.2, be mixed the time be
12~16min, the bacterial content of Bacillus sphaericus bacteria suspension is 107Cfu/mL, fermentation temperature are 35~45 DEG C, and fermentation time is
9~11 days.
Step(3)The lard and the mass ratio of sesame oil are 2:1, mixing time is 4~6min, oxidizing temperature of fermenting
For 30~36 DEG C, fermentation oxidization time is 8~10 days.
Step(4)The mixing time is 20~30min, and continuation mixing time is 1~3h.
Compared with other methods, advantageous effects are the present invention:
(1)The present invention is using calcium carbonate as carrier, and using carrier surface loading microorganisms, acid occurs for grease under microbial action
Lose, and produce organic acid, neutralization reaction occurs with concrete neutral and alkali material, forms crystalline solid not soluble in water, especially exists
In alternation of wetting and drying cyclic process, crystallization process is activated repeatedly, and in the life cycle of concrete structure, crystalline solid is constant
Ground grows and realizes micro-cracks self-healing, so as to achieve the purpose that concrete durability, first with silane coupling agent to general
Logical portland cement surface is modified, and estersil base is formed silanol group, silanol group and ordinary silicon after hydrolysis occurs with water
Hydroxyl reaction occurs for acid salt cement surface, then forms part covalent bond by drying and dehydrating, and final silane coupling agent is in ordinary silicon
Acid salt cement surface forms polymolecular cover layer, changes the intrinsic hydrophilic nmature of Portland cement, at the same to its surface into
Row aluminum coated steel, is entered inside Portland cement stratum granulosum by phenol, and polymerisation occurs in inside, improves material
Interlamellar spacing, improves organic Interface adhesive strength between inorganic particle, makes its modified as interface cohesion agent, particle is to coagulation
Native internal void is effectively filled, simultaneously because two alternate combination power greatly enhance, enables the intensity of concrete effective
Improve, improve the durability of concrete again;
(2)The present invention contains abundant Bacillus sphaericus in calcium carbonate surface loading microorganisms, wherein microorganism, with bacterium spore
Son and nutriment are effectively filled in inside concrete hole as particle, self-healing property protective layer are formd, due in air
Carbon dioxide, there is free carbon dioxide and carbonate ions in water, be easy to occur with the calcium ion that calcium hydroxide provides
Reaction, and calcium carbonate crystal is formed, play the role of blind, filling capillary channel, in addition bacterial spore is in dormancy shape
Under state, crack and them are activated until water enters, and start draw nutrient, produce lime stone, microorganism energy used in particle
Enough make generation organic acid spoiled by rancid oil or fat, effectively bear the high alkalinity of concrete, and produce substantial amounts of heat, be conducive to calcium carbonate
Decomposition, crystallization process activated repeatedly, and in the life cycle of concrete structure, crystalline solid is continuously grown so that
Reach the durability self-healing repairing effect of concrete, be with a wide range of applications.
Embodiment
Weigh 1.0~1.2kg Portland cements and grind 6~8min, collect abrasive flour, be in mass ratio 1:
2:12~16min is mixed in abrasive flour, acetone and phenol by 3, is obtained mixed slurry, is by volume 1:4 is even by silane
After joining 10~12min of agent KH-570 and mixed slurry mixing, it is placed in baking oven, 24 is dried at being 65~75 DEG C in temperature
~32min, collects dried object and ground 100 mesh sieve, obtains modified cement granules;Weigh 6~8g dipotassium hydrogen phosphates, 4~6g
6~8min is mixed in potassium dihydrogen phosphate, 8~10g sucrose, 2~4g sodium chloride, 1~3g magnesium sulfate and 2~4g citric acids, obtains
It is 1 in mass ratio by mixture and deionized water to mixture:4 mixing are placed in mixer, are stirred at being 24~28 DEG C in temperature
16~20min is mixed, obtains Self-made mixture, and the pH value for adjusting Self-made mixture is counted, respectively in parts by weight to 7.0~7.2
Weigh 24~36 parts of calcium carbonate and 16~20 parts of Self-made mixture mixing are placed in 12~16min of stirring in fermentation tank, then add 10
~12 parts of bacterial contents are 107The Bacillus sphaericus bacteria suspension of cfu/mL, 9~11 are sealed by fermentation at being 35~45 DEG C in temperature
My god, tunning is obtained, fermentation-derived product, removes ferment filtrate, obtains fermentation filter residue;It is 2 in mass ratio:1 by lard and
4~6min is mixed in sesame oil, obtains miscella, continues to add mixing 1~2 times of biogas slurry of oil quality to miscella, loads band
Have in the fermentation tank of oxygen, oxidation 8~10 days is sealed by fermentation at being 30~36 DEG C in temperature, after fermentation oxidation, takes out hair
Ferment product, as makes organic acid by oneself;Count in parts by weight, weigh 20~30 parts of modified cement granules, 16~20 parts of fermentations respectively
Filter residue, 10~12 parts of self-control organic acids and 18~24 parts of deionized water mixing are placed in 20~30min of stirring in mixer, then add
3~5 parts of flyash, 4~6 parts of rubbles, 2~4 parts of lignosulfonates, 1~3 part of cement expansive material AEA and 5~7 parts of river sands, after
It is continuous that 1~3h, discharging is mixed, you can durable self-cure type concrete is made.
Example 1
Weigh 1.0kg Portland cements and grind 6min, collect abrasive flour, be in mass ratio 1:2:3 by grounds travel
12min is mixed in end, acetone and phenol, obtains mixed slurry, is by volume 1:4 by Silane coupling reagent KH-570 and mixing
After 10min is mixed in slurry, it is placed in baking oven, 24min is dried at being 65 DEG C in temperature, collection dried object is simultaneously ground
100 mesh sieves, obtain modified cement granules;Weigh 6g dipotassium hydrogen phosphates, 4g potassium dihydrogen phosphates, 8g sucrose, 2g sodium chloride, 1g sulfuric acid
6min is mixed in magnesium and 2g citric acids, obtains mixture, is 1 in mass ratio by mixture and deionized water:4 mixing, which are placed in, stirs
Mix in machine, stir 16min at being 24 DEG C in temperature, obtain Self-made mixture, and the pH value for adjusting Self-made mixture is pressed to 7.0
Parts by weight meter, weighs 24 parts of calcium carbonate respectively and 16 parts of Self-made mixture mixing are placed in fermentation tank and stir 12min, then adds
10 parts of bacterial contents are 107The Bacillus sphaericus bacteria suspension of cfu/mL, is sealed by fermentation 9 days at being 35 DEG C in temperature, is fermented
Product, fermentation-derived product, removes ferment filtrate, obtains fermentation filter residue;It is 2 in mass ratio:1 stirs lard and sesame oil mixing
4min is mixed, obtains miscella, continues to add mixing 1 times of biogas slurry of oil quality to miscella, is fitted into the fermentation tank with oxygen,
Temperature is that oxidation 8 days is sealed by fermentation at 30 DEG C, after fermentation oxidation, takes out tunning, as makes organic acid by oneself;By weight
Number meter, weighs 20 parts of modified cement granules, 16 parts of fermentation filter residues, 10 parts of self-control organic acids and 18 parts of deionized water mixing respectively
It is placed in mixer and stirs 20min, then adds 3 parts of flyash, 4 parts of rubbles, 2 parts of lignosulfonates, 1 portion of cement expansive material
AEA and 5 part of river sand, continues that 1h, discharging is mixed, you can durable self-cure type concrete is made.
Example 2
Weigh 1.1kg Portland cements and grind 7min, collect abrasive flour, be in mass ratio 1:2:3 by grounds travel
14min is mixed in end, acetone and phenol, obtains mixed slurry, is by volume 1:4 by Silane coupling reagent KH-570 and mixing
After 11min is mixed in slurry, it is placed in baking oven, 28min is dried at being 70 DEG C in temperature, collection dried object is simultaneously ground
100 mesh sieves, obtain modified cement granules;Weigh 7g dipotassium hydrogen phosphates, 5g potassium dihydrogen phosphates, 9g sucrose, 3g sodium chloride, 2g sulfuric acid
7min is mixed in magnesium and 3g citric acids, obtains mixture, is 1 in mass ratio by mixture and deionized water:4 mixing, which are placed in, stirs
Mix in machine, stir 18min at being 26 DEG C in temperature, obtain Self-made mixture, and the pH value for adjusting Self-made mixture is pressed to 7.1
Parts by weight meter, weighs 30 parts of calcium carbonate respectively and 18 parts of Self-made mixture mixing are placed in fermentation tank and stir 14min, then adds
11 parts of bacterial contents are 107The Bacillus sphaericus bacteria suspension of cfu/mL, is sealed by fermentation 10 days at being 40 DEG C in temperature, is fermented
Product, fermentation-derived product, removes ferment filtrate, obtains fermentation filter residue;It is 2 in mass ratio:1 stirs lard and sesame oil mixing
5min is mixed, obtains miscella, continues to add mixing 1 times of biogas slurry of oil quality to miscella, is fitted into the fermentation tank with oxygen,
Temperature is that oxidation 9 days is sealed by fermentation at 33 DEG C, after fermentation oxidation, takes out tunning, as makes organic acid by oneself;By weight
Number meter, weighs 25 parts of modified cement granules, 18 parts of fermentation filter residues, 11 parts of self-control organic acids and 21 parts of deionized water mixing respectively
It is placed in mixer and stirs 25min, then adds 4 parts of flyash, 5 parts of rubbles, 3 parts of lignosulfonates, 2 portions of cement expansive materials
AEA and 6 part of river sand, continues that 2h, discharging is mixed, you can durable self-cure type concrete is made.
Example 3
Weigh 1.2kg Portland cements and grind 8min, collect abrasive flour, be in mass ratio 1:2:3 by grounds travel
16min is mixed in end, acetone and phenol, obtains mixed slurry, is by volume 1:4 by Silane coupling reagent KH-570 and mixing
After 12min is mixed in slurry, it is placed in baking oven, 32min is dried at being 75 DEG C in temperature, collection dried object is simultaneously ground
100 mesh sieves, obtain modified cement granules;Weigh 8g dipotassium hydrogen phosphates, 6g potassium dihydrogen phosphates, 10g sucrose, 4g sodium chloride, 3g sulphur
8min is mixed in sour magnesium and 4g citric acid, obtains mixture, is 1 in mass ratio by mixture and deionized water:4 mixing are placed in
In mixer, 20min is stirred at being 28 DEG C in temperature, obtains Self-made mixture, and adjust the pH value of Self-made mixture to 7.2,
Count in parts by weight, weigh 36 parts of calcium carbonate respectively and 20 parts of Self-made mixture mixing are placed in fermentation tank and stir 16min, then add
It is 10 to add 12 parts of bacterial contents7The Bacillus sphaericus bacteria suspension of cfu/mL, is sealed by fermentation 11 days at being 45 DEG C in temperature, is sent out
Ferment product, fermentation-derived product, removes ferment filtrate, obtains fermentation filter residue;It is 2 in mass ratio:1 mixes lard and sesame oil
6min is stirred, obtains miscella, continues to add mixing 2 times of biogas slurries of oil quality to miscella, is fitted into the fermentation tank with oxygen,
Oxidation 10 days is sealed by fermentation at being 36 DEG C in temperature, after fermentation oxidation, tunning is taken out, as makes organic acid by oneself;Press
Parts by weight meter, weighs 30 parts of modified cement granules, 20 parts of fermentation filter residues, 12 parts of self-control organic acids and 24 parts of deionized waters respectively
Mixing, which is placed in mixer, stirs 30min, then adds 5 parts of flyash, 6 parts of rubbles, 4 parts of lignosulfonates, 3 parts of concrete expansions
Agent AEA and 7 parts of river sands, continue that 3h, discharging is mixed, you can durable self-cure type concrete is made.
Comparative example
With the self-cure type concrete of company of Zhengzhou City production as a comparison case to durable self-cure type concrete produced by the present invention
It is detected with the self-cure type concrete in comparative example, testing result is as shown in table 1:
1st, mechanical strength is tested
It is measured using universal testing machine.
2nd, crackle self-healing contrast test
Example 1~3 and comparative example prepared by the present invention digs out 0.4mm cracks, observes crack healing time.
3rd, alkali resistance test
Example 1~3 and comparative example test block prepared by the present invention put into the Mgcl of saturation after maintenance2Soak, carry out in solution
Observation.Test block is water-tight, illustrates the CaSiO that reaction produces3With Barbiturates in seawater(The wherein Mgcl of most causticity2)But do not occur
Reaction, thus the concrete have prevent the effect of sea water intrusion and alkaline-resisting effect.
4th, endurancing
According to GB/T50476-2008《Durability design specification》It is detected.
Table 1
Test event | Example 1 | Example 2 | Example 3 | Comparative example |
Intensity level(MPa) | 179 | 183 | 185 | 162 |
The self-healing time(d) | 20 | 19 | 17 | 65 |
Alkali resistance test(Range estimation) | Test block not water outlet | Test block not water outlet | Test block not water outlet | There is water outlet phenomenon in test block |
Durability | Free from flaw produces | Free from flaw produces | Free from flaw produces | Internal a little crack produces |
According to data in table 1, durable self-cure type concrete mechanics intensity produced by the present invention is high, crackle self-healing speed is fast,
Alkali resistance is strong, hence it is evident that better than comparative example.Therefore, there is wide prospect of the application.
Claims (5)
1. a kind of preparation method of durable self-cure type concrete, it is characterised in that specifically preparation process is:
(1)Weigh 1.0~1.2kg Portland cements to grind, abrasive flour is collected, by abrasive flour, acetone and benzene
Phenol is mixed, and obtains mixed slurry, after Silane coupling reagent KH-570 and mixed slurry are mixed, is placed in drying in baking oven
It is dry, dried object and ground 100 mesh sieve are collected, obtains modified cement granules;
(2)Weigh 6~8g dipotassium hydrogen phosphates, 4~6g potassium dihydrogen phosphates, 8~10g sucrose, 2~4g sodium chloride, 1~3g magnesium sulfate
It is mixed with 2~4g citric acids, obtains mixture, mixture and deionized water is mixed to be placed in mixer and stirred, is obtained
Self-made mixture, and the pH value of Self-made mixture is adjusted, count in parts by weight, weigh 24~36 parts of calcium carbonate and 16~20 respectively
Part Self-made mixture mixing, which is placed in fermentation tank, stirs, then adds 10~12 parts of Bacillus sphaericus bacteria suspensions, is sealed by fermentation, obtains
To tunning, fermentation-derived product, removes ferment filtrate, obtains fermentation filter residue;
(3)Lard and sesame oil are mixed, obtain miscella, continues to add 1~2 times of natural pond of mixing oil quality to miscella
Liquid, is fitted into the fermentation tank with oxygen, is sealed by fermentation and aoxidizes, and after fermentation oxidation, takes out tunning, is to be formed with certainly
Machine acid;
(4)Count in parts by weight, weigh respectively 20~30 parts of modified cement granules, 16~20 parts fermentation filter residues, 10~12 parts from
Organic acid processed and the mixing of 18~24 parts of deionized waters are placed in mixer and stir, then add 3~5 parts of flyash, 4~6 parts of rubbles,
2~4 parts of lignosulfonates, 1~3 part of cement expansive material AEA and 5~7 parts of river sands, continue to be mixed, discharging, you can are made
Durable self-cure type concrete.
A kind of 2. preparation method of durable self-cure type concrete according to claim 1, it is characterised in that:Step(1)Institute
The time that grinds stated is 6~8min, and the mass ratio of abrasive flour, acetone and phenol is 1:2:3, mixing time for 12~
The volume ratio of 16min, Silane coupling reagent KH-570 and mixed slurry is 1:4, mixing time is 10~12min, and drying temperature is
65~75 DEG C, drying time is 24~32min.
A kind of 3. preparation method of durable self-cure type concrete according to claim 1, it is characterised in that:Step(2)Institute
The mixing time stated is 6~8min, and the mass ratio of mixture and deionized water is 1:4, whipping temp is 24~28 DEG C, during stirring
Between be 16~20min, the pH value for adjusting Self-made mixture is 7.0~7.2, and the mixing time is 12~16min, spherical gemma
The bacterial content of bacillus bacteria suspension is 107Cfu/mL, fermentation temperature are 35~45 DEG C, and fermentation time is 9~11 days.
A kind of 4. preparation method of durable self-cure type concrete according to claim 1, it is characterised in that:Step(3)Institute
The lard and the mass ratio of sesame oil stated are 2:1, mixing time is 4~6min, and fermentation oxidizing temperature is 30~36 DEG C, fermentation oxygen
It is 8~10 days to change the time.
A kind of 5. preparation method of durable self-cure type concrete according to claim 1, it is characterised in that:Step(4)Institute
The mixing time stated is 20~30min, and continuation mixing time is 1~3h.
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CN110386794A (en) * | 2019-08-28 | 2019-10-29 | 沈华初 | A kind of self-reinforcing building concrete and preparation method |
CN111056806A (en) * | 2019-12-23 | 2020-04-24 | 解正祥 | Preparation method of compression-resistant recycled concrete |
CN111138107A (en) * | 2020-01-15 | 2020-05-12 | 浙江海洋大学 | Microorganism immobilization method for self-repairing of concrete cracks |
CN112030660A (en) * | 2020-09-19 | 2020-12-04 | 王荃 | Construction method of anti-freezing pavement |
CN113121145A (en) * | 2021-04-15 | 2021-07-16 | 同济大学 | Concrete crack self-repairing material based on microbial collaborative mineralization and application |
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CN110386794A (en) * | 2019-08-28 | 2019-10-29 | 沈华初 | A kind of self-reinforcing building concrete and preparation method |
CN110386794B (en) * | 2019-08-28 | 2020-12-15 | 罗芳芳 | Self-reinforced building concrete and preparation method thereof |
CN111056806A (en) * | 2019-12-23 | 2020-04-24 | 解正祥 | Preparation method of compression-resistant recycled concrete |
CN111138107A (en) * | 2020-01-15 | 2020-05-12 | 浙江海洋大学 | Microorganism immobilization method for self-repairing of concrete cracks |
CN111138107B (en) * | 2020-01-15 | 2021-11-23 | 浙江海洋大学 | Microorganism immobilization method for self-repairing of concrete cracks |
CN112030660A (en) * | 2020-09-19 | 2020-12-04 | 王荃 | Construction method of anti-freezing pavement |
CN112030660B (en) * | 2020-09-19 | 2021-04-02 | 王荃 | Construction method of anti-freezing pavement |
CN113121145A (en) * | 2021-04-15 | 2021-07-16 | 同济大学 | Concrete crack self-repairing material based on microbial collaborative mineralization and application |
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