CN109265098A

CN109265098A - A method of self-repair concrete is prepared using egg shell

Info

Publication number: CN109265098A
Application number: CN201811098794.4A
Authority: CN
Inventors: 王敏; 丁春美
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2019-01-25

Abstract

The present invention relates to a kind of methods for preparing self-repair concrete using egg shell, belong to construction material preparation technical field.The present invention is first by egg shell grinds, urea being coated after peach gum heating and melting again, self-control functional stuffing is made, again with being centrifuged after fluid nutrient medium culture yeasts bacterium, saccharomycete freeze-dried powder is made in centrifugation vacuum freeze-drying, eggshell crushed material and self-control functional stuffing and saccharomycete freeze-dried powder and other concrete materials are finally mixed to prepare self-repair concrete, self-repair concrete produced by the present invention can sufficiently in mending concrete depth gap, with splendid selfreparing effect, have a extensive future.

Description

A method of self-repair concrete is prepared using egg shell

Technical field

The present invention relates to a kind of methods for preparing self-repair concrete using egg shell, belong to construction material technology of preparing neck Domain.

Background technique

With the high development of human society, modern architecture proposes new challenge to concrete material, it is desirable that concrete Material not only wants load-bearing, should also have the function of sound, light, electricity, magnetic, heat etc., to adapt to multi-functional and intelligent building needs.It repairs Concrete is present most widely used construction material and structural material, repair concrete due to the constituent of structure itself and Its bearing capacity feature, inside often there are some original microcracks, its during one's term of military service, variation and time with load Passage, internal crackle can be extended to crack, or even extending into surface causes concrete material to crack, and split forming perforation After seam, concrete is subject to the erosion and destruction of external environment and various adverse factors, such as steel bar corrosion, carbonization, chloride ion Erosion and sulfate attack etc., eventually lead to the cracking of concrete material, destroy, are unsatisfactory for requirement, seriously affect coagulation The durability of soil material.From mid-term the 1990s, functional form and intelligent cement-based material are successively carried out both at home and abroad Research, and some valuable achievements are achieved, the cement based conductive composite material such as occurred in succession, cement base magnetic coupling material Material is capable of the cement-base composite material of armoured magnetic field and electromagnetic wave, material stress, strain and damage self-test cement base composite wood Material and Self-temperatuer Sensing cement-base composite material.But how using concrete and its structure can adapt to environment automatically, by Self-heal after damage, and to the mechanism study of self-repair concrete, now only a few countries such as the U.S., Japan are in experiment The room exploratory stage not yet obtains the research achievement with Practical significance.But concrete is in use vulnerable to external environment at present Erosion and destruction, make it impermeability with stability in terms of it is poor, self-reparing capability is to be improved.

Therefore, inventing a kind of new concrete with self-repair function has positive meaning.

Summary of the invention

In-situ repair can only be carried out in the position containing healant for self-repair concrete common at present, for inside The depth gap of gap and not healant is unable to fully the defect of repairing, provides a kind of utilization egg shell preparation selfreparing The method of concrete.

In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:

A method of self-repair concrete is prepared using egg shell, it is characterised in that specific preparation step are as follows:

(1) egg shell is weighed, is first rinsed 3~5 times, then the egg shell after flushing is put into baking oven, is dried to obtain with deionized water Dry egg shell is put into mortar by dry egg shell, crosses 200 meshes after grinding 1~2h, obtains sieving egg shell powder End, it is spare；

(2) it weighs peach gum to be put into beaker, is heated to 70~80 DEG C, stirred in heating with glass bar, until peach gum is complete Fine melt solution, then urea is added into beaker, continue to be stirred 10~15min with glass bar；

(3) after to above-mentioned be stirred, beaker is put into refrigerator, stands solidification, the product after solidification is taken out, powder is put into 20~30min is crushed in broken machine, obtains crushed material, as self-control functional stuffing, it is spare；

(4) according to parts by weight, weigh 1~2 part of glucose, 4~5 parts of molasses, 3~4 parts of wheat brans, 2~3 parts of maize alcohol stillages, 1~ High temperature is put into after 2 parts of yeast extracts, 1~2 part of ammonium sulfate and 3~5 parts of potassium dihydrogen phosphates and 80~90 parts of sterile water mixing to go out In bacterium tank, high-temperature sterilization obtains saccharomycete fluid nutrient medium；

(5) yeast seeds are accessed into above-mentioned yeast liquid body culture medium, carry out shaking flask culture, and removal is filtered after culture Filter residue obtains filtrate, puts the filtrate into ultrasonic centrifuge, centrifugal treating, collects lower sediment, lower sediment is put into vacuum It is lyophilized in instrument, vacuum freeze-drying obtains saccharomycete freeze-dried powder；

(6) according to parts by weight, weigh 80~90 parts of ordinary portland cements, 20~30 parts of quartz sands, 10~20 parts it is spare Be sieved egg shell powder, 15~20 parts of self-control functional stuffings, 5~8 parts of above-mentioned saccharomycete freeze-dried powders, 3~5 parts of polyvinyl alcohol, 200 ~300 parts of river sands and 150~200 parts of deionized waters are sequentially loaded into concrete mixer, and discharging is after stirring to get compound is reviewed one's lessons by oneself Solidifying soil.

The temperature of drying as described in step (1) is 105~110 DEG C, and the dry time is 30~40min.

The additional amount of urea described in step (2) is melt peach gum quality 30%.

The cured temperature of standing described in step (3) is 4~6 DEG C, and standing the cured time is 1~2h.

The temperature of high-temperature sterilization described in step (4) is 200~220 DEG C, and the time of high-temperature sterilization is 10~15min.

The inoculum concentration of saccharomycete described in step (5) is 5%, and the revolving speed of shaking flask culture is 100~150r/min, shaking flask The temperature of culture is 35~40 DEG C, time of shaking flask culture is 20~for 24 hours, the revolving speed of centrifugal treating is 4000~5000r/min, The time of centrifugal treating is 10~15min, and the temperature of vacuum freeze-drying is -70~-60 DEG C, the pressure of vacuum freeze-drying is 0.5~ 1.0MPa, the time of vacuum freeze-drying are 12~14h.

The revolving speed of stirring described in step (6) is 80~100r/min, and the temperature of stirring is 45~55 DEG C, stirring when Between be 120~150s.

The beneficial effects of the present invention are:

(1) self-control functional stuffing is made first by egg shell grinds, then by urea is coated after peach gum heating and melting in the present invention, then With being centrifuged after fluid nutrient medium culture yeasts bacterium, saccharomycete freeze-dried powder is made in centrifugation vacuum freeze-drying, finally by egg-shell meal It minces and makes by oneself functional stuffing and saccharomycete freeze-dried powder and other concrete materials are mixed to prepare self-repair concrete, the present invention Concrete obtained after solidification, if the later period during one's term of military service concrete with load variation and the time passage, Internal crack propagation is at crack, and extraneous rainwater can be infiltrated from distress in concrete at this time, and the moisture infiltrated encounters saccharomycete It can be restored to normal metabolic state from dormant state after freeze-dried powder, and using peach gum as nutrient source, carry out eubolism production Raw carbon dioxide, while peach gum is exposed internal urea after microorganism feeding degradation, urea and the contact with moisture infiltrated are sent out Unboiled water solution can also generate great amount of carbon dioxide, then with carbon dioxide and under conditions of water, the meeting of egg shell calcium carbonate and water And carbon dioxide reacts and generates water-soluble calcium bicarbonate, calcium bicarbonate is deeper as the chance water infiltrated immerses concrete In the internal interstices of layer, heat and internal interstices that the calcium bicarbonate of internal interstices can be generated in saccharomycete metabolism are immersed Again inverse chemical reaction occurs under conditions of low pressure and generates insoluble tosca in internal interstices, plays and crams coagulation Native gap, has the function that selfreparing, since reparation ingredient of the invention can be any to inside concrete in company with rain infiltration Place, therefore depth gap that can sufficiently in mending concrete has splendid selfreparing effect, has a extensive future.

Specific embodiment

Egg shell is weighed, is first rinsed 3~5 times with deionized water, then the egg shell after flushing is put into baking oven, is in temperature Dry 30~40min obtains dry egg shell at 105~110 DEG C, and dry egg shell is put into mortar, 1~2h is ground 200 meshes are crossed afterwards, obtain sieving egg shell powder end, it is spare；It weighs peach gum to be put into beaker, is heated to 70~80 DEG C, side Heating side is stirred with glass bar, until peach gum melts completely, then the urea for melting peach gum quality 30% is added into beaker, is continued 10~15min is stirred with glass bar；It is to be mixed that beaker is put into refrigerator after mixing, solidification 1 is stood at 4~6 DEG C ~2h takes out the product after solidification, is put into 20~30min of crushing in pulverizer, obtains crushed material, and as self-control function is filled out Material, it is spare；According to parts by weight, 1~2 part of glucose, 4~5 parts of molasses, 3~4 parts of wheat brans, 2~3 parts of maize alcohol stillages, 1 are weighed High temperature is put into after~2 parts of yeast extracts, 1~2 part of ammonium sulfate and 3~5 parts of potassium dihydrogen phosphates and 80~90 parts of sterile water mixing In sterilization tank, 10~15min of high-temperature sterilization obtains saccharomycete fluid nutrient medium at 200~220 DEG C；It is upward by 5% inoculum concentration It states in saccharomycete fluid nutrient medium and accesses yeast seeds, the item in the case where revolving speed is 100~150r/min, temperature is 35~40 DEG C Shaking flask culture 20 under part~for 24 hours, filtering removal filter residue, obtains filtrate, puts the filtrate into ultrasonic centrifuge after culture, with The revolving speed of 4000~5000r/min is centrifuged 10~15min, collects lower sediment, lower sediment is put into vacuum freeze-drying instrument, Temperature is -70~-60 DEG C, and pressure is 12~14h of vacuum freeze-drying under conditions of 0.5~1.0MPa, obtains saccharomycete freeze-dried powder；It presses Parts by weight meter weighs 80~90 parts of ordinary portland cements, 20~30 parts of quartz sands, 10~20 parts of spare sieving egg shells Powder, 15~20 parts of self-control functional stuffings, 5~8 parts of above-mentioned saccharomycete freeze-dried powders, 3~5 parts of polyvinyl alcohol, 200~300 parts of rivers Sand and 150~200 parts of deionized waters are sequentially loaded into concrete mixer, are stirred at 45~55 DEG C with 80~100r/min revolving speed Discharging is after mixing 120~150s to get self-repair concrete.

Example 1

Egg shell is weighed, is first rinsed 3 times with deionized water, then the egg shell after flushing is put into baking oven, in the case where temperature is 105 DEG C Dry 30min obtains dry egg shell, and dry egg shell is put into mortar, crosses 200 meshes after grinding 1h, is sieved Egg shell powder, it is spare；It weighs peach gum to be put into beaker, is heated to 70 DEG C, stirred in heating with glass bar, until peach Glue melts completely, then the urea for melting peach gum quality 30% is added into beaker, continues to be stirred 10min with glass bar；Wait stir It mixes after mixing, beaker is put into refrigerator, solidification 1h is stood at 4 DEG C, the product after solidification is taken out, is put into pulverizer 20~30min is crushed, crushed material is obtained, as self-control functional stuffing, it is spare；According to parts by weight, 1 part of glucose, 4 parts are weighed Molasses, 3 parts of wheat brans, 2 parts of maize alcohol stillages, 1 part of yeast extract, 1 part of ammonium sulfate and 3 parts of potassium dihydrogen phosphates and 80 parts of sterile waters are mixed It is put into after conjunction in high-temperature sterilization tank, high-temperature sterilization 10min obtains saccharomycete fluid nutrient medium at 200 DEG C；By 5% inoculum concentration Yeast seeds are accessed into above-mentioned yeast liquid body culture medium, under conditions of revolving speed is 100r/min, temperature is at 35 DEG C Shaking flask culture 20h, filtering removal filter residue, obtains filtrate, puts the filtrate into ultrasonic centrifuge, with 4000r/ after culture The revolving speed of min is centrifuged 10min, collects lower sediment, lower sediment is put into vacuum freeze-drying instrument, is -70 DEG C in temperature, pressure For vacuum freeze-drying 12h under conditions of 0.5MPa, saccharomycete freeze-dried powder is obtained；According to parts by weight, 80 parts of normal silicates are weighed Cement, 20 parts of quartz sands, 10 parts of spare sieving egg shell powder, 15 parts of self-control functional stuffings, 5 parts of above-mentioned saccharomycete freeze-dryings Powder, 3 parts of polyvinyl alcohol, 200 parts of river sands and 150 parts of deionized waters are sequentially loaded into concrete mixer, are existed with 80r/min revolving speed Discharging is after stirring 120s at 45 DEG C to get self-repair concrete.

Example 2

Egg shell is weighed, is first rinsed 4 times with deionized water, then the egg shell after flushing is put into baking oven, in the case where temperature is 108 DEG C Dry 35min obtains dry egg shell, and dry egg shell is put into mortar, crosses 200 meshes after grinding 1h, is sieved Egg shell powder, it is spare；It weighs peach gum to be put into beaker, is heated to 75 DEG C, stirred in heating with glass bar, until peach Glue melts completely, then the urea for melting peach gum quality 30% is added into beaker, continues to be stirred 13min with glass bar；Wait stir It mixes after mixing, beaker is put into refrigerator, stand solidification 1h at 5 DEG C, the product after solidification is taken out, is put into pulverizer 25min is crushed, crushed material is obtained, as self-control functional stuffing, it is spare；According to parts by weight, 1 part of glucose, 4 portions of sugar are weighed Honey, 3 parts of wheat brans, 3 parts of maize alcohol stillages, 2 parts of yeast extracts, 1 part of ammonium sulfate and 5 parts of potassium dihydrogen phosphates and 85 parts of sterile water mixing After be put into high-temperature sterilization tank, high-temperature sterilization 13min obtains saccharomycete fluid nutrient medium at 210 DEG C；By 5% inoculum concentration to Yeast seeds are accessed in above-mentioned saccharomycete fluid nutrient medium, are shaken under conditions of revolving speed is 130r/min, temperature is at 38 DEG C Bottle culture 22h, filtering removal filter residue, obtains filtrate, puts the filtrate into ultrasonic centrifuge, with 4500r/min after culture Revolving speed be centrifuged 13min, collect lower sediment, lower sediment be put into vacuum freeze-drying instrument, be -65 DEG C in temperature, pressure is Vacuum freeze-drying 13h under conditions of 0.8MPa obtains saccharomycete freeze-dried powder；According to parts by weight, 85 parts of normal silicate water are weighed Mud, 25 parts of quartz sands, 15 parts of spare sieving egg shell powder, 18 parts of self-control functional stuffings, 7 parts of above-mentioned saccharomycete freeze-dried powders, 4 Part polyvinyl alcohol, 250 parts of river sands and 180 parts of deionized waters are sequentially loaded into concrete mixer, with 90r/min revolving speed at 50 DEG C Discharging is after lower stirring 135s to get self-repair concrete.

Example 3

Egg shell is weighed, is first rinsed 5 times with deionized water, then the egg shell after flushing is put into baking oven, in the case where temperature is 110 DEG C Dry 40min obtains dry egg shell, and dry egg shell is put into mortar, crosses 200 meshes after grinding 2h, is sieved Egg shell powder, it is spare；It weighs peach gum to be put into beaker, is heated to 80 DEG C, stirred in heating with glass bar, until peach Glue melts completely, then the urea for melting peach gum quality 30% is added into beaker, continues to be stirred 15min with glass bar；Wait stir It mixes after mixing, beaker is put into refrigerator, solidification 2h is stood at 6 DEG C, the product after solidification is taken out, is put into pulverizer 30min is crushed, crushed material is obtained, as self-control functional stuffing, it is spare；According to parts by weight, 2 parts of glucose, 5 portions of sugar are weighed Honey, 4 parts of wheat brans, 3 parts of maize alcohol stillages, 2 parts of yeast extracts, 2 parts of ammonium sulfate and 5 parts of potassium dihydrogen phosphates and 90 parts of sterile water mixing After be put into high-temperature sterilization tank, high-temperature sterilization 15min obtains saccharomycete fluid nutrient medium at 220 DEG C；By 5% inoculum concentration to Yeast seeds are accessed in above-mentioned saccharomycete fluid nutrient medium, are shaken under conditions of revolving speed is 150r/min, temperature is at 40 DEG C For 24 hours, filtering removal filter residue, obtains filtrate, puts the filtrate into ultrasonic centrifuge, with 5000r/min after culture for bottle culture Revolving speed be centrifuged 15min, collect lower sediment, lower sediment be put into vacuum freeze-drying instrument, be -60 DEG C in temperature, pressure is Vacuum freeze-drying 14h under conditions of 1.0MPa obtains saccharomycete freeze-dried powder；According to parts by weight, 90 parts of normal silicate water are weighed Mud, 30 parts of quartz sands, 20 parts of spare sieving egg shell powder, 20 parts of self-control functional stuffings, 8 parts of above-mentioned saccharomycete freeze-dried powders, 5 parts of polyvinyl alcohol, 300 parts of river sands and 200 parts of deionized waters are sequentially loaded into concrete mixer, with 100r/min revolving speed 55 Discharging is after stirring 150s at DEG C to get self-repair concrete.

Reference examples

Using traditional concrete as reference examples, the concrete in self-repair concrete produced by the present invention and reference examples is carried out Impermeability pressure and compression strength detection；

Test method: impermeability pressure test: " normal concrete long-term behaviour and durability test method standard " GB/T50082 is pressed Pressurization step by step the measurement of anti-permeability performance is carried out to same group of test specimen；

Intensity test: pressure resistance is carried out by GB/T 11837-2009 Test methods of the concrete compressive strength of concrete pipes for water Degree measurement；

1 performance test results of table

Detection project	Example 1	Example 2	Example 3	Reference examples
					Impermeability pressure (MPa)	5.29	5.35	5.48	3.20
Compression strength (MPa)	34.2	34.8	36.2	30.1
					Voidage (%)	4	4	3	7

Wherein anti-permeability strength indicate when concrete impermeability test in one group of 6 test specimen 4 test specimens when not seeping water it is different most Big water pressure, impermeability pressure is bigger, illustrates that impervious effect is better, inside concrete gap is fewer；

Self-repair concrete produced by the present invention can depth sufficiently in mending concrete it can be seen from detection data in upper table Gap is spent, there is splendid selfreparing effect, have a extensive future.

Claims

1. a kind of method for preparing self-repair concrete using egg shell, it is characterised in that specific preparation step are as follows:

2. a kind of method for preparing self-repair concrete using egg shell according to claim 1, it is characterised in that: step (1) temperature of the drying described in is 105~110 DEG C, and the dry time is 30~40min.

3. a kind of method for preparing self-repair concrete using egg shell according to claim 1, it is characterised in that: step (2) additional amount of the urea described in is melt peach gum quality 30%.

4. a kind of method for preparing self-repair concrete using egg shell according to claim 1, it is characterised in that: step (3) the cured temperature of standing described in is 4~6 DEG C, and standing the cured time is 1~2h.

5. a kind of method for preparing self-repair concrete using egg shell according to claim 1, it is characterised in that: step (4) temperature of the high-temperature sterilization described in is 200~220 DEG C, and the time of high-temperature sterilization is 10~15min.

6. a kind of method for preparing self-repair concrete using egg shell according to claim 1, it is characterised in that: step (5) inoculum concentration of the saccharomycete described in is 5%, and the revolving speed of shaking flask culture is 100~150r/min, and the temperature of shaking flask culture is 35~40 DEG C, time of shaking flask culture is 20~for 24 hours, and the revolving speed of centrifugal treating is 4000~5000r/min, centrifugal treating when Between be 10~15min, the temperature of vacuum freeze-drying is -70~-60 DEG C, and the pressure of vacuum freeze-drying is 0.5~1.0MPa, vacuum freeze-drying Time be 12~14h.

7. a kind of method for preparing self-repair concrete using egg shell according to claim 1, it is characterised in that: step (6) revolving speed of the stirring described in is 80~100r/min, and the temperature of stirring is 45~55 DEG C, the time of stirring is 120~ 150s。