CN108164287B - Durable concrete curing agent - Google Patents
Durable concrete curing agent Download PDFInfo
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- CN108164287B CN108164287B CN201711468435.9A CN201711468435A CN108164287B CN 108164287 B CN108164287 B CN 108164287B CN 201711468435 A CN201711468435 A CN 201711468435A CN 108164287 B CN108164287 B CN 108164287B
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- 239000004567 concrete Substances 0.000 title claims abstract description 59
- 238000002156 mixing Methods 0.000 claims abstract description 62
- 238000003756 stirring Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000001723 curing Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000004575 stone Substances 0.000 claims abstract description 30
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 28
- 235000006040 Prunus persica var persica Nutrition 0.000 claims abstract description 27
- 235000010489 acacia gum Nutrition 0.000 claims abstract description 27
- 239000003094 microcapsule Substances 0.000 claims abstract description 26
- 239000001785 acacia senegal l. willd gum Substances 0.000 claims abstract description 25
- 229920001661 Chitosan Polymers 0.000 claims abstract description 19
- 241000606860 Pasteurella Species 0.000 claims abstract description 19
- 150000003904 phospholipids Chemical class 0.000 claims abstract description 18
- 239000004094 surface-active agent Substances 0.000 claims abstract description 17
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 13
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004202 carbamide Substances 0.000 claims abstract description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 7
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 61
- 244000144730 Amygdalus persica Species 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 18
- 150000004676 glycans Chemical class 0.000 claims description 16
- 229920001282 polysaccharide Polymers 0.000 claims description 16
- 239000005017 polysaccharide Substances 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 12
- 239000012295 chemical reaction liquid Substances 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 8
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 7
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 7
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 claims description 6
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 6
- 239000008103 glucose Substances 0.000 claims description 6
- 239000008347 soybean phospholipid Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 5
- 239000005457 ice water Substances 0.000 claims description 5
- 241000193395 Sporosarcina pasteurii Species 0.000 claims description 4
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 3
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 3
- 229960003237 betaine Drugs 0.000 claims description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000008344 egg yolk phospholipid Substances 0.000 claims description 3
- 229940068998 egg yolk phospholipid Drugs 0.000 claims description 3
- 239000008267 milk Substances 0.000 claims description 3
- 235000013336 milk Nutrition 0.000 claims description 3
- 210000004080 milk Anatomy 0.000 claims description 3
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 claims description 3
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 229920000084 Gum arabic Polymers 0.000 claims description 2
- 239000000205 acacia gum Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 241000193830 Bacillus <bacterium> Species 0.000 abstract description 5
- 239000004566 building material Substances 0.000 abstract description 2
- 240000006413 Prunus persica var. persica Species 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 61
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 16
- 239000011521 glass Substances 0.000 description 14
- 238000005259 measurement Methods 0.000 description 14
- 230000008961 swelling Effects 0.000 description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 description 8
- 239000012065 filter cake Substances 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000006703 hydration reaction Methods 0.000 description 6
- 239000004005 microsphere Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 108010046334 Urease Proteins 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- C04B40/04—Preventing evaporation of the mixing water
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a durable concrete curing agent, and belongs to the technical field of building materials. According to the invention, 20-30 parts of calcium nitrate solution, 40-50 parts of chitosan solution, 10-20 parts of urea and 20-30 parts of pasteurella bacillus liquid are stirred and mixed, then sodium sulfate solution with the volume 0.2-0.3 times of that of the chitosan solution is added, stirring and mixing are continued, the temperature is reduced, glutaraldehyde solution with the volume 0.3-0.4 times of that of the chitosan solution is added dropwise, stirring and mixing are continued, the pH is adjusted, filtering and drying are carried out, and the modified microcapsule is obtained; and stirring and mixing the modified microcapsule, the peach gum solution, the Arabic gum solution, the surfactant, the phospholipid, the silane coupling agent, the modified medical stone and the water to obtain the durable concrete curing agent. The durable concrete curing agent prepared by the technical scheme of the invention has the characteristic of obviously improving the mechanical property and the durability of concrete.
Description
Technical Field
The invention discloses a durable concrete curing agent, and belongs to the technical field of building materials.
Background
Concrete is an artificial stone made of cement, fine aggregate (sand), coarse aggregate (broken stone) and water, is the most main component of a building, and the quality of the concrete determines the quality of an engineering building. In order to optimize the performance of concrete, proper curing must be performed to provide sufficient water to ensure cement hydration, thereby minimizing porosity in the concrete and achieving the desired strength and durability. Generally, after concrete is poured, due to the humidity difference between the concrete and the surrounding environment, moisture on the surface of the concrete is evaporated outwards, so that the normal hydration reaction of the concrete is influenced, the preset strength cannot be reached, and even shrinkage cracking is generated. In order to ensure the normal running of the hydration reaction of the concrete, after the concrete is poured, proper temperature and enough humidity need to be kept for a quite long time to meet the good hydration and hardening conditions of the concrete. Curing of concrete is a necessary measure to create such conditions.
The traditional concrete curing method generally adopts water curing, namely, a certain measure is adopted to supplement water to the concrete and prevent water loss, and the concrete after pouring is usually covered with straw bags or paved with wood chips, gunny bags, sand and the like, and is regularly sprayed with water or coated with plastic films, curing paper and the like; there are numerous reports and summaries, and even relevant standards for materials and methods. The existing coating method takes manpower and material resources, and because some people neglect, the watering and the covering maintenance can not be carried out timely according to the requirements and the time limit of relevant standards, the standard of natural maintenance can not be achieved, the early strength development of concrete is influenced, the surface of the concrete is dried and shrunk, cracked and sanded, and sometimes substances seeped from covering materials such as wood chips and the like can pollute the surface of the concrete; more seriously, the whole quality and other performances of the concrete are influenced, and in addition, the coating method cannot meet the construction requirements of beams and columns of high-rise buildings and large buildings with certain inclination angles.
Therefore, how to improve the defect that the traditional concrete curing agent has poor effect of improving the mechanical property and the durability of concrete so as to obtain the concrete curing agent with higher comprehensive performance is a problem to be urgently solved by popularization and application of the concrete curing agent and meeting the industrial production requirement.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the defect that the traditional concrete curing agent has poor effect of improving the mechanical property and the durability of concrete, the durable concrete curing agent is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a durable concrete curing agent is composed of the following raw materials in parts by weight: 20-30 parts of modified microcapsules, 20-30 parts of peach gum liquid, 20-30 parts of Arabic gum liquid, 8-10 parts of surfactant, 8-10 parts of phospholipid, 5-6 parts of silane coupling agent, 8-10 parts of modified medical stone and 30-40 parts of water;
the preparation process of the durable concrete curing agent comprises the following steps: weighing the raw materials according to the composition of the raw materials, and stirring and mixing the modified microcapsule, the peach gum solution, the Arabic gum solution, the surfactant, the phospholipid, the silane coupling agent, the modified medical stone and water to obtain the durable concrete curing agent.
The preparation process of the modified microcapsule comprises the following steps: according to the weight parts, 20-30 parts of calcium nitrate solution, 40-50 parts of chitosan solution, 10-20 parts of urea and 20-30 parts of pasteurella bacillus solution are stirred and mixed, then sodium sulfate solution with the volume 0.2-0.3 times of that of the chitosan solution is added, stirring and mixing are continued, the temperature is reduced, glutaraldehyde solution with the mass fraction of 20-30% and the volume 0.1-0.2 times of that of the chitosan solution is added dropwise, stirring and mixing are continued, the pH is adjusted, and filtering and drying are carried out, so that the modified microcapsule is obtained; the preparation process of the chitosan liquid comprises the following steps: mixing chitosan and water according to a mass ratio of 1: 50-1: 100, heating, stirring and mixing to obtain a chitosan liquid; the bacillus pasteurii bacterial liquid is prepared from the following raw materials in parts by weight: 80-100 parts of deionized water, 10-20 parts of glucose solution, 4-6 parts of bacillus pasteurii, 10-15 parts of glycerol and 8-10 parts of ethylene glycol.
The preparation process of the peach gum solution comprises the following steps: mixing peach gum powder and water according to a mass ratio of 1: 50-1: 100, heating, stirring and mixing to obtain the peach gum solution.
The preparation process of the acacia gum liquid comprises the following steps: mixing Arabic gum powder with water according to a mass ratio of 1: 50-1: 100, heating, stirring and mixing to obtain the arabic gum solution.
The surfactant is any one of sodium dodecyl benzene sulfonate, dodecyl dimethyl betaine or octadecyl dimethyl betaine.
The phospholipid is any one of soybean phospholipid, milk phospholipid or egg yolk phospholipid.
The silane coupling agent is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
The preparation process of the modified medical stone comprises the following steps: mixing medical stone and sulfuric acid according to a mass ratio of 1: 30-1: 50 stirring to react, filtering and washing to obtain the modified medical stone.
The invention has the beneficial effects that:
(1) the modified microcapsule is added, during the use process, firstly, the pasteurella in the microcapsule breathes to generate carbon dioxide, the generated carbon dioxide enables the microcapsule to expand and offset the expansion and contraction stress in the cement hydration process, thereby effectively avoiding the cracking of concrete, secondly, the pasteurella in the microcapsule generates urease in the metabolism process, the urease can decompose urea in the microcapsule into carbonate ions, as the surface of the cell wall of the pasteurella carries negative charges, calcium ions in the microcapsule can be adsorbed by the cell wall of the pasteurella, thereby taking cells as crystal nucleus, nano calcium carbonate can be generated around the bacteria, the generated nano calcium carbonate is taken as a support to form nano calcium carbonate microspheres, during the cement hydration process, partial microcapsules are broken by the expansion and contraction stress, so that the nano calcium carbonate microspheres seep out, and simultaneously, the carbon dioxide in the microcapsules can assist the diffusion of the nano calcium carbonate microspheres, the internal nano calcium carbonate microspheres are extruded and filled in the system, on one hand, the nano calcium carbonate microspheres are diffused to play an extruding role, so that the pore channels in the system are effectively reduced, capillaries are refined or eliminated, and the bleeding of the system is reduced, so that the mechanical property and the durability of the system are improved, on the other hand, the nano calcium carbonate microspheres are filled in concrete, the porosity in the system is reduced, the density is improved, and the mechanical property and the durability of the system are further improved;
(2) according to the invention, the modified medical stone is added, the medical stone is subjected to acid treatment, soluble metal ions in the medical stone are dissolved out, so that a porous structure is formed inside the medical stone, the peach gum solution and the Arabic gum solution are easy to enter the medical stone in the mixing process, and cross-linking is performed from the inside of the medical stone, so that the porosity in the system is reduced, the density is improved, and the mechanical property of the system is improved.
Detailed Description
Mixing chitosan and water according to a mass ratio of 1: 50-1: adding 100 into a No. 1 beaker, stirring and mixing for 20-30 min by using a glass rod, standing and swelling for 3-4 h, then moving the No. 1 beaker to a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving for 30-50 min under the conditions that the temperature is 90-95 ℃ and the rotating speed is 300-500 r/min to obtain a shell polysaccharide solution; according to the weight parts, 80-100 parts of deionized water, 10-20 parts of glucose solution with the mass fraction of 0.1-0.2%, 4-6 parts of pasteurella, 10-15 parts of glycerol and 8-10 parts of ethylene glycol are placed in a No. 2 beaker, and are stirred and mixed to obtain pasteurella bacteria liquid; according to the weight parts, 20-30 parts of 10-20% calcium nitrate solution, 40-50 parts of shell polysaccharide solution, 10-20 parts of urea and 20-30 parts of pasteurella bacteria solution are placed in a single-neck flask, stirred and mixed for 30-50 min under the condition that the rotating speed is 400-500 r/min, then sodium sulfate solution with the mass fraction of 0.2-0.3 times of the volume of the shell polysaccharide solution is added into the single-neck flask, stirred and mixed for 30-50 min under the condition that the rotating speed is 400-500 r/min, then the single-neck flask is placed in an ice water bath, the temperature in the single-neck flask is reduced to 10-15 ℃, then a rubber head dropper is used for dropwise adding 20-30% glutaraldehyde solution with the mass fraction of 0.1-0.2 times of the volume of the shell polysaccharide solution into the single-neck flask, and after the dropwise adding of the glutaraldehyde solution is finished, stirred and mixed for 20-30 min under the condition that the rotating speed is 200-300 r/min, dropwise adding a sodium hydroxide solution with the mass fraction of 20-30% into a single-neck flask by using a rubber head dropper to adjust the pH value to 8.8-9.2, stirring and mixing for 20-30 min under the condition that the rotating speed is 100-200 r/min to obtain a reaction liquid, filtering the reaction liquid to obtain filter residue, placing the filter residue in an oven, and drying to constant weight under the condition that the temperature is 105-110 ℃ to obtain the modified microcapsule; mixing peach gum powder and water according to a mass ratio of 1: 50-1: adding 100 of the mixture into a No. 3 beaker, stirring and mixing the mixture for 20-30 min by using a glass rod, standing and swelling the mixture for 3-4 h, then moving the No. 3 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 30-50 min under the conditions that the temperature is 90-95 ℃ and the rotating speed is 300-500 r/min to obtain peach gum solution; mixing Arabic gum powder with water according to a mass ratio of 1: 50-1: 100, adding the mixture into a No. 4 beaker, stirring and mixing the mixture for 20-30 min by using a glass rod, standing and swelling the mixture for 3-4 h, then moving the No. 4 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 30-50 min under the conditions that the temperature is 90-95 ℃ and the rotating speed is 300-500 r/min to obtain Arabic gum liquid; mixing medical stone and 40-50% of sulfuric acid in a mass ratio of 1: 30-1: 50, placing the mixture into a No. 5 beaker, stirring and reacting for 40-60 min at the rotating speed of 400-500 r/min to obtain a mixed solution, filtering the mixed solution to obtain a filter cake, and washing the filter cake for 3-5 times by using deionized water to obtain modified medical stone; according to the weight parts, 20-30 parts of modified microcapsules, 20-30 parts of peach gum liquid, 20-30 parts of Arabic gum liquid, 8-10 parts of surfactant, 8-10 parts of phospholipid, 5-6 parts of silane coupling agent, 8-10 parts of modified medical stone and 30-40 parts of water are placed in a mixer, and are stirred and mixed for 40-60 min under the condition that the rotating speed is 500-600 r/min, so that the durable concrete curing agent is obtained. The surfactant is any one of sodium dodecyl benzene sulfonate, dodecyl dimethyl betaine or octadecyl dimethyl betaine. The phospholipid is any one of soybean phospholipid, milk phospholipid or egg yolk phospholipid. The silane coupling agent is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
Example 1
Mixing chitosan and water according to a mass ratio of 1: 100, adding the mixture into a No. 1 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing the mixture for swelling for 4h, moving the No. 1 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain a chitosan liquid; putting 100 parts of deionized water, 20 parts of a glucose solution with the mass fraction of 0.2%, 6 parts of pasteurella, 15 parts of glycerol and 10 parts of ethylene glycol into a No. 2 beaker, and stirring and mixing to obtain pasteurella bacteria liquid; according to the weight portion, 30 portions of 20 percent calcium nitrate solution, 50 portions of shell polysaccharide solution, 20 portions of urea and 30 portions of pasteurella bacillus bacterial solution are placed in a single-neck flask, stirred and mixed for 50min under the condition of 500r/min of rotating speed, then sodium sulfate solution with the mass fraction of 15 percent which is 0.3 times of the volume of the shell polysaccharide solution is added into the single-neck flask, stirred and mixed for 50min under the condition of 500r/min of rotating speed, then the single-neck flask is placed in an ice water bath, the temperature in the single-neck flask is reduced to 15 ℃, then a rubber head dropper is used for dropwise adding 30 percent glutaraldehyde solution with the mass fraction of 0.2 times of the volume of the shell polysaccharide solution into the single-neck flask, after the dropwise adding of the glutaraldehyde solution is finished, the mixture is stirred and mixed for 30min under the condition of 300r/min of rotating speed, then a rubber head dropper is used for dropwise adding 30 percent sodium hydroxide solution with the mass fraction into the single-neck flask to adjust the pH to 9.2, stirring and mixing for 30min at the rotation speed of 200r/min to obtain reaction liquid, filtering the reaction liquid to obtain filter residue, placing the filter residue in an oven, and drying at the temperature of 110 ℃ to constant weight to obtain modified microcapsule; mixing peach gum powder and water according to a mass ratio of 1: 100, adding the mixture into a No. 3 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 3 beaker to a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain peach gum solution; mixing Arabic gum powder with water according to a mass ratio of 1: 100, adding the mixture into a No. 4 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 4 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain Arabic gum liquid; mixing medical stone and 50% sulfuric acid according to a mass ratio of 1: 50, placing the mixture in a No. 5 beaker, stirring and reacting for 60min at the rotating speed of 500r/min to obtain a mixed solution, filtering the mixed solution to obtain a filter cake, and washing the filter cake for 5 times by using deionized water to obtain the modified medical stone; according to the weight parts, 30 parts of modified microcapsules, 30 parts of peach gum liquid, 30 parts of Arabic gum liquid, 10 parts of surfactant, 10 parts of phospholipid, 6 parts of silane coupling agent, 10 parts of modified medical stone and 40 parts of water are placed in a mixer, and are stirred and mixed for 60min under the condition that the rotating speed is 600r/min, so that the durable concrete curing agent is obtained. The surfactant is sodium dodecyl benzene sulfonate. The phospholipid is soybean phospholipid. The silane coupling agent is a silane coupling agent KH-550.
Example 2
Mixing peach gum powder and water according to a mass ratio of 1: 100, adding the mixture into a No. 3 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 3 beaker to a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain peach gum solution; mixing Arabic gum powder with water according to a mass ratio of 1: 100, adding the mixture into a No. 4 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 4 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain Arabic gum liquid; mixing medical stone and 50% sulfuric acid according to a mass ratio of 1: 50, placing the mixture in a No. 5 beaker, stirring and reacting for 60min at the rotating speed of 500r/min to obtain a mixed solution, filtering the mixed solution to obtain a filter cake, and washing the filter cake for 5 times by using deionized water to obtain the modified medical stone; according to the weight parts, 30 parts of peach gum liquid, 30 parts of Arabic gum liquid, 10 parts of surfactant, 10 parts of phospholipid, 6 parts of silane coupling agent, 10 parts of modified medical stone and 40 parts of water are placed in a mixer, and are stirred and mixed for 60min under the condition that the rotating speed is 600r/min, so that the durable concrete curing agent is obtained. The surfactant is sodium dodecyl benzene sulfonate. The phospholipid is soybean phospholipid. The silane coupling agent is a silane coupling agent KH-550.
Example 3
Mixing chitosan and water according to a mass ratio of 1: 100, adding the mixture into a No. 1 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing the mixture for swelling for 4h, moving the No. 1 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain a chitosan liquid; putting 100 parts of deionized water, 20 parts of a glucose solution with the mass fraction of 0.2%, 6 parts of pasteurella, 15 parts of glycerol and 10 parts of ethylene glycol into a No. 2 beaker, and stirring and mixing to obtain pasteurella bacteria liquid; according to the weight portion, 30 portions of 20 percent calcium nitrate solution, 50 portions of shell polysaccharide solution, 20 portions of urea and 30 portions of pasteurella bacillus bacterial solution are placed in a single-neck flask, stirred and mixed for 50min under the condition of 500r/min of rotating speed, then sodium sulfate solution with the mass fraction of 15 percent which is 0.3 times of the volume of the shell polysaccharide solution is added into the single-neck flask, stirred and mixed for 50min under the condition of 500r/min of rotating speed, then the single-neck flask is placed in an ice water bath, the temperature in the single-neck flask is reduced to 15 ℃, then a rubber head dropper is used for dropwise adding 30 percent glutaraldehyde solution with the mass fraction of 0.2 times of the volume of the shell polysaccharide solution into the single-neck flask, after the dropwise adding of the glutaraldehyde solution is finished, the mixture is stirred and mixed for 30min under the condition of 300r/min of rotating speed, then a rubber head dropper is used for dropwise adding 30 percent sodium hydroxide solution with the mass fraction into the single-neck flask to adjust the pH to 9.2, stirring and mixing for 30min at the rotation speed of 200r/min to obtain reaction liquid, filtering the reaction liquid to obtain filter residue, placing the filter residue in an oven, and drying at the temperature of 110 ℃ to constant weight to obtain modified microcapsule; mixing peach gum powder and water according to a mass ratio of 1: 100, adding the mixture into a No. 3 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 3 beaker to a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain peach gum solution; mixing Arabic gum powder with water according to a mass ratio of 1: 100, adding the mixture into a No. 4 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 4 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain Arabic gum liquid; mixing medical stone and 50% sulfuric acid according to a mass ratio of 1: 50, placing the mixture in a No. 5 beaker, stirring and reacting for 60min at the rotating speed of 500r/min to obtain a mixed solution, filtering the mixed solution to obtain a filter cake, and washing the filter cake for 5 times by using deionized water to obtain the modified medical stone; according to the weight parts, 30 parts of modified microcapsules, 30 parts of peach gum liquid, 30 parts of Arabic gum liquid, 10 parts of surfactant, 6 parts of silane coupling agent, 10 parts of modified medical stone and 40 parts of water are placed in a mixer, and are stirred and mixed for 60min under the condition that the rotating speed is 600r/min, so that the durable concrete curing agent is obtained. The surfactant is sodium dodecyl benzene sulfonate.
Example 4
Mixing chitosan and water according to a mass ratio of 1: 100, adding the mixture into a No. 1 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing the mixture for swelling for 4h, moving the No. 1 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain a chitosan liquid; putting 100 parts of deionized water, 20 parts of a glucose solution with the mass fraction of 0.2%, 6 parts of pasteurella, 15 parts of glycerol and 10 parts of ethylene glycol into a No. 2 beaker, and stirring and mixing to obtain pasteurella bacteria liquid; according to the weight portion, 30 portions of 20 percent calcium nitrate solution, 50 portions of shell polysaccharide solution, 20 portions of urea and 30 portions of pasteurella bacillus bacterial solution are placed in a single-neck flask, stirred and mixed for 50min under the condition of 500r/min of rotating speed, then sodium sulfate solution with the mass fraction of 15 percent which is 0.3 times of the volume of the shell polysaccharide solution is added into the single-neck flask, stirred and mixed for 50min under the condition of 500r/min of rotating speed, then the single-neck flask is placed in an ice water bath, the temperature in the single-neck flask is reduced to 15 ℃, then a rubber head dropper is used for dropwise adding 30 percent glutaraldehyde solution with the mass fraction of 0.2 times of the volume of the shell polysaccharide solution into the single-neck flask, after the dropwise adding of the glutaraldehyde solution is finished, the mixture is stirred and mixed for 30min under the condition of 300r/min of rotating speed, then a rubber head dropper is used for dropwise adding 30 percent sodium hydroxide solution with the mass fraction into the single-neck flask to adjust the pH to 9.2, stirring and mixing for 30min at the rotation speed of 200r/min to obtain reaction liquid, filtering the reaction liquid to obtain filter residue, placing the filter residue in an oven, and drying at the temperature of 110 ℃ to constant weight to obtain modified microcapsule; mixing peach gum powder and water according to a mass ratio of 1: 100, adding the mixture into a No. 3 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 3 beaker to a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain peach gum solution; mixing Arabic gum powder with water according to a mass ratio of 1: 100, adding the mixture into a No. 4 beaker, stirring and mixing the mixture for 30min by using a glass rod, standing and swelling the mixture for 4h, moving the No. 4 beaker into a digital display speed measurement constant-temperature magnetic stirrer, and heating, stirring and dissolving the mixture for 50min under the conditions that the temperature is 95 ℃ and the rotating speed is 500r/min to obtain Arabic gum liquid; according to the weight parts, 30 parts of modified microcapsules, 30 parts of peach gum liquid, 30 parts of Arabic gum liquid, 10 parts of surfactant, 10 parts of phospholipid, 6 parts of silane coupling agent and 40 parts of water are placed in a mixer, and are stirred and mixed for 60min under the condition that the rotating speed is 600r/min, so that the durable concrete curing agent is obtained. The surfactant is sodium dodecyl benzene sulfonate. The phospholipid is soybean phospholipid. The silane coupling agent is a silane coupling agent KH-550.
Comparative example: a concrete curing agent produced by Shandong building materials Co.
The durable concrete curing agent obtained in examples 1 to 4 and the comparative product were subjected to performance tests, which were as follows:
1. mechanical properties: coating a curing agent test piece according to the standard requirement of JC901, coating a test piece curing agent on the exposed surface, then curing indoors with a mold, wherein the environmental temperature is (20 +/-5) DEG C, the relative humidity is (50 +/-10)%, and detecting the compressive strength of the concrete after 7d and 28 d;
2. durability: and (5) performing a carbonization experiment on the concrete coated with the test piece curing agent by referring to GB/T50082, and detecting the carbonization depth.
Specific detection results are shown in table 1:
table 1: specific detection results of mechanical properties and durability
The detection results in table 1 show that the durable concrete curing agent prepared by the technical scheme of the invention has the characteristic of remarkably improving the mechanical property and the durability of concrete, and has a wide prospect in the development of the concrete curing agent industry.
Claims (7)
1. A durable concrete curing agent is characterized in that: the composite material is prepared from the following raw materials in parts by weight: 20-30 parts of modified microcapsules, 20-30 parts of peach gum liquid, 20-30 parts of Arabic gum liquid, 8-10 parts of surfactant, 8-10 parts of phospholipid, 5-6 parts of silane coupling agent, 8-10 parts of modified medical stone and 30-40 parts of water;
the preparation process of the durable concrete curing agent comprises the following steps: weighing the raw materials according to the composition of the raw materials, and stirring and mixing the modified microcapsule, the peach gum solution, the Arabic gum solution, the surfactant, the phospholipid, the silane coupling agent, the modified medical stone and water to obtain the durable concrete curing agent;
the preparation process of the modified microcapsule comprises the following steps: according to the weight parts, 20-30 parts of 10-20% calcium nitrate solution, 40-50 parts of shell polysaccharide solution, 10-20 parts of urea and 20-30 parts of pasteurella bacteria solution are placed in a single-neck flask, stirred and mixed for 30-50 min under the condition that the rotating speed is 400-500 r/min, then sodium sulfate solution with the mass fraction of 0.2-0.3 times of the volume of the shell polysaccharide solution is added into the single-neck flask, stirred and mixed for 30-50 min under the condition that the rotating speed is 400-500 r/min, then the single-neck flask is placed in an ice water bath, the temperature in the single-neck flask is reduced to 10-15 ℃, then a rubber head dropper is used for dropwise adding 20-30% glutaraldehyde solution with the mass fraction of 0.1-0.2 times of the volume of the shell polysaccharide solution into the single-neck flask, and after the dropwise adding of the glutaraldehyde solution is finished, stirred and mixed for 20-30 min under the condition that the rotating speed is 200-300 r/min, dropwise adding a sodium hydroxide solution with the mass fraction of 20-30% into a single-neck flask by using a rubber head dropper to adjust the pH value to 8.8-9.2, stirring and mixing for 20-30 min under the condition that the rotating speed is 100-200 r/min to obtain a reaction liquid, filtering the reaction liquid to obtain filter residue, placing the filter residue in an oven, and drying to constant weight under the condition that the temperature is 105-110 ℃ to obtain the modified microcapsule; the preparation process of the chitosan liquid comprises the following steps: mixing chitosan and water according to a mass ratio of 1: 50-1: 100, heating, stirring and mixing to obtain a chitosan liquid; the bacillus pasteurii bacterial liquid is prepared from the following raw materials in parts by weight: 80-100 parts of deionized water, 10-20 parts of glucose solution, 4-6 parts of bacillus pasteurii, 10-15 parts of glycerol and 8-10 parts of ethylene glycol.
2. The durable concrete curing agent of claim 1, wherein: the preparation process of the peach gum solution comprises the following steps: mixing peach gum powder and water according to a mass ratio of 1: 50-1: 100, heating, stirring and mixing to obtain the peach gum solution.
3. The durable concrete curing agent of claim 1, wherein: the preparation process of the acacia gum liquid comprises the following steps: mixing Arabic gum powder with water according to a mass ratio of 1: 50-1: 100, heating, stirring and mixing to obtain the arabic gum solution.
4. The durable concrete curing agent of claim 1, wherein: the surfactant is any one of sodium dodecyl benzene sulfonate, dodecyl dimethyl betaine or octadecyl dimethyl betaine.
5. The durable concrete curing agent of claim 1, wherein: the phospholipid is any one of soybean phospholipid, milk phospholipid or egg yolk phospholipid.
6. The durable concrete curing agent of claim 1, wherein: the silane coupling agent is any one of a silane coupling agent KH-550, a silane coupling agent KH-560 or a silane coupling agent KH-570.
7. The durable concrete curing agent of claim 1, wherein: the preparation process of the modified medical stone comprises the following steps: mixing medical stone and sulfuric acid according to a mass ratio of 1: 30-1: 50 stirring to react, filtering and washing to obtain the modified medical stone.
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