CN112390586A - High-strength concrete and preparation method thereof - Google Patents
High-strength concrete and preparation method thereof Download PDFInfo
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- CN112390586A CN112390586A CN202011387109.7A CN202011387109A CN112390586A CN 112390586 A CN112390586 A CN 112390586A CN 202011387109 A CN202011387109 A CN 202011387109A CN 112390586 A CN112390586 A CN 112390586A
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- 239000011372 high-strength concrete Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000004567 concrete Substances 0.000 claims abstract description 110
- 239000003365 glass fiber Substances 0.000 claims abstract description 83
- 239000000839 emulsion Substances 0.000 claims abstract description 45
- 239000004568 cement Substances 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 19
- 239000004576 sand Substances 0.000 claims description 15
- 239000010881 fly ash Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 239000012615 aggregate Substances 0.000 claims description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 8
- 229910000077 silane Inorganic materials 0.000 claims description 8
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000006703 hydration reaction Methods 0.000 abstract description 19
- 230000000052 comparative effect Effects 0.000 description 13
- 238000012360 testing method Methods 0.000 description 9
- 108091006146 Channels Proteins 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 230000003487 anti-permeability effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000012466 permeate Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013065 commercial product Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003469 silicate cement Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
-
- 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
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of concrete, and particularly discloses high-strength concrete and a preparation method thereof. The high-strength concrete is prepared by stirring and mixing the following raw materials in parts by weight: 130 parts of cement 110-; the preparation method comprises the following steps: the method comprises the steps of firstly adding hollow glass fibers to promote hydration reaction, improving the strength of concrete, and then adding seed emulsion to plug the hollow glass fiber pipelines after curing. The high-strength concrete has the advantages of high strength and permeation resistance.
Description
Technical Field
The application relates to the technical field of concrete, in particular to high-strength concrete and a preparation method thereof.
Background
The concrete is artificial stone which is prepared by taking cement as a main cementing material, water, aggregate, an additive and an admixture in a proper proportion and carrying out uniform stirring, dense forming, curing and hardening on the mixture. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely concrete mixture; hardened, i.e. hardened concrete or concrete.
Currently, the existing concrete preparation method comprises the following steps:
s1: placing cement, water, aggregate, an additive and an admixture in a concrete mixer and stirring to obtain a concrete mixture;
s2: the initial mixture undergoes hydration reaction and is solidified to obtain hardened concrete.
In view of the above-mentioned related technologies, the inventors believe that the water content of the obtained concrete is not easy to permeate into the concrete after curing, which causes insufficient hydration reaction, so that the strength of the prepared concrete is limited, and higher-strength concrete cannot be obtained.
Disclosure of Invention
In order to improve the strength of concrete, the application provides high-strength concrete.
In order to obtain high-strength concrete, the application provides a preparation method of the high-strength concrete.
In a first aspect, the present application provides a high strength concrete, which adopts the following technical scheme:
the high-strength concrete is prepared by stirring and mixing the following raw materials in parts by weight:
110 portions of cement and 130 portions of cement,
480 parts of aggregate and 520 parts of cement,
400 portions of sand and 420 portions of sand,
110 portions of water and 130 portions of water,
25-35 parts of fly ash,
60-80 parts of hollow glass fiber.
By adopting the technical scheme, in the preparation process of the concrete, cement, aggregate, sand, water, fly ash and hollow glass fiber are required to be added for mixing and stirring, the silicate cement can generate hydration reaction to solidify the concrete, watering maintenance is required to be continued after solidification, the hydration reaction in the concrete is more sufficient, the hydration reaction is more sufficient, the strength of the concrete is higher, the added hollow glass fiber can provide a water guide channel, so that water can enter the solidified concrete more easily, the hydration reaction is promoted, and the strength of the concrete is improved.
Preferably, the concrete curing agent further comprises 30-50 parts of seed emulsion, wherein the seed emulsion is injected into the concrete in a pressurizing mode after the concrete is cured, and the seed emulsion comprises the following raw materials in parts by weight: 1-4 parts of acrylic acid, 30-45 parts of methyl methacrylate, 0.2-1.0 part of ammonium persulfate, 0.5-3 parts of sodium dodecyl sulfate and 50-60 parts of water.
By adopting the technical scheme, after the concrete is cured, as the added hollow glass fiber causes the water impermeability of the concrete to be poor, the seed emulsion is injected into the concrete in a pressurizing mode, so that the pore diameter of the hollow glass fiber is blocked, and the water impermeability of the concrete is greatly improved. The seed emulsion forms polymeric particles in an emulsion polymerization mode, the seed emulsion generates a high molecular polymerization reaction and is carried out in the pipe wall of the hollow glass fiber, the pipe diameter of the hollow glass fiber is finally blocked, the water impermeability is improved, and meanwhile, gaps among concrete can be filled by the seed emulsion, so that the water impermeability of the concrete is enhanced.
Preferably, the hollow glass fiber further comprises 90-110 parts of silane coupling agent, the hollow glass fiber is soaked in the silane coupling agent, and the inner side tube wall of the hollow glass fiber is modified by the silane coupling agent.
By adopting the technical scheme, the silane coupling agent is used for modifying the hollow glass fiber, so that the inner side wall surface of the hollow glass fiber is well combined with the seed emulsion, the formed polymeric particles are adhered to the wall surface of the hollow glass fiber in the process of entering the concrete by the seed emulsion, and finally, the channel of the hollow glass fiber is blocked, thereby improving the water seepage resistance.
Preferably, the outer side pipe wall of the hollow glass fiber is modified by a silane coupling agent.
By adopting the technical scheme, silane modification treatment is carried out on the outer side of the hollow glass fiber, so that the hollow glass fiber can be uniformly distributed in the concrete, the crack resistance is improved, the toughness is improved, and the compressive strength of the concrete is enhanced.
Preferably, the hollow glass fiber is soaked in a silane coupling agent for silane treatment, and is kept for 2 hours after being heated to 70 ℃ to obtain the modified hollow glass fiber.
By adopting the technical scheme, the silane coupling agent is used for treating the hollow glass fiber, so that the fiber can be protected from abrasion, and a good interface can be provided for bonding between the hollow glass fiber and the seed emulsion, so that the seed emulsion can stay in the pipe wall of the hollow glass fiber to block the pipe wall, an anti-permeability effect is achieved, and the concrete can have higher strength after being solidified for a longer time.
Preferably, the length of the hollow glass fiber is 140 mm and 160 mm.
By adopting the technical scheme, the hollow glass fiber has the advantages of light weight, high compressive strength and the like, and can be better dispersed in concrete when the length of the hollow glass fiber is 140-160 mm, so that the water guide effect is achieved, and the compressive strength of the concrete is enhanced.
In a second aspect, the present application provides a method for preparing a high-strength concrete, which adopts the following technical scheme:
the preparation method of the high-strength concrete comprises the following steps,
s1: mixing cement, aggregate, water, fly ash, sand and hollow glass fiber to obtain a concrete mixture;
s2: pouring the concrete mixture into a mould for pouring;
s3: maintaining at 20 + -5 deg.C for 28 days; and maintaining under the condition that the humidity is not lower than 95%.
By adopting the technical scheme, the hollow glass fiber is added into the concrete raw material to be stirred and mixed, after the concrete is cured, the concrete still needs to be watered, so that the silicate in the concrete and water generate hydration reaction, the hydration reaction can be more sufficient, the strength of the concrete can be improved, the hollow glass fiber plays a role of a water guide pipeline, and after the concrete is cured, the water can conveniently permeate into the concrete to complete the hydration reaction, so that the strength of the concrete is improved.
Preferably, the method for preparing the high-strength concrete comprises the following steps,
s1: mixing cement, aggregate, water, fly ash, sand and the modified hollow glass fiber to obtain a concrete mixture;
s2: pouring the concrete mixture into a mould for pouring;
s3: maintaining at 20 + -5 deg.C for 28 days; maintaining under the condition that the humidity is not lower than 95%;
s4: and after the concrete is cured, adding the prepared seed emulsion into the cured concrete by pressurization.
By adopting the technical scheme, the hollow glass fiber is treated by silane and then is mixed and cured with other raw materials of concrete together, so that the hollow glass fiber is better dispersed in the concrete, the seed emulsion is added after the concrete is cured, and in the process that the seed emulsion slowly permeates into the concrete, the seed emulsion generates high molecular polymerization reaction to change the seed emulsion from a liquid state to a solid state, so that a channel of the hollow glass fiber is blocked, the impermeability of the concrete is improved, meanwhile, the silane treatment provides a good interface for the bonding between the seed emulsion and the wall surface of the hollow glass fiber pipeline, so that the seed emulsion and the wall surface of the pipeline are better combined, and the impermeability of the concrete is improved.
In summary, the present application has the following beneficial effects:
1. in the concrete preparation process, cement, aggregate, sand, water, fly ash and hollow glass fiber are required to be added for mixing and stirring, portland cement can generate hydration reaction to solidify the concrete, watering and curing are required to be carried out continuously after solidification, hydration reaction in the concrete is more sufficient, the hydration reaction is more sufficient, the strength of the concrete is higher, the added hollow glass fiber can provide a water guide channel, water can enter the solidified concrete more easily, the hydration reaction is promoted, and the strength of the concrete is improved.
2. The seed emulsion is preferably adopted in the application, and the anti-seepage performance of the concrete is reduced by adding the hollow glass fiber, so that the seed emulsion is injected into the concrete in a pressurizing mode, and the seed emulsion is subjected to high molecular polymerization reaction after entering the hollow glass fiber to change the liquid state into the solid state, so that the pore diameter of the hollow glass fiber is blocked, and the anti-seepage performance of the concrete is greatly improved.
3. According to the method, the hollow glass fiber is added to promote the hydration reaction, so that the strength of the concrete is improved, and then the seed emulsion is added to plug the pipeline of the hollow glass fiber after curing, so that the concrete with high strength is obtained.
Detailed Description
The raw material sources are as follows:
the cement is a commercial product of Jinnan Xinsen chemical Co., Ltd, has the granularity of 325 meshes, the brand number of 1344-09-8 and the cement strength grade of 42.5.
The aggregate is a commercial product of Zhengzhou ze energy-saving technology limited company.
The fly ash is a product sold in markets of mineral processing factories in Taiyue of Lingshu county.
Sand is a commercially available product from wuhanxin paint asia limited.
Hollow glass fibers are commercially available from Shanghai Michelin Biochemical technology, Inc.
Gamma-aminopropyltriethoxysilane is a commercially available product from Shanghai-derived leaf Biotechnology, Inc.
In the case of the example 1, the following examples are given,
the high-strength concrete is prepared by stirring and mixing the following raw materials in parts by weight:
125 parts of cement, namely, 125 parts of cement,
500 parts of aggregate, 2 cm of average grain diameter,
410 portions of sand with the average grain diameter of 0.8 cm,
125 parts of water, namely, water,
30 parts of fly ash, namely 30 parts of fly ash,
75 parts of hollow glass fiber with the length of 150 mm,
100 parts of a silane coupling agent, namely,
40 parts of seed emulsion, namely 40 parts of seed emulsion,
wherein the silane coupling agent is gamma-aminopropyl triethoxysilane (KH-550);
the seed emulsion comprises the following raw materials in parts by weight: 3 parts of acrylic acid, 38 parts of methyl methacrylate, 0.8 part of ammonium persulfate, 2 parts of sodium dodecyl sulfate and 55 parts of water.
Wherein the modification step of the hollow glass fiber is as follows,
preparing silane coupling agent and water into silane treating fluid according to the proportion of 1:1, adding 75kg of hollow glass fiber and soaking in 50m3And introducing nitrogen into the silane treatment solution for protection, heating to 70 ℃, keeping for 2h, taking out and drying to obtain the modified hollow glass fiber.
The preparation method of the high-strength concrete comprises the following steps:
s1: mixing cement, aggregate, water, fly ash, sand and the modified hollow glass fiber to obtain a concrete mixture;
s2: pouring the concrete mixture into a mould for pouring.
S3: maintaining at 20 deg.C for 28 days; and maintaining under the condition that the humidity is not lower than 95%.
S4: and after the concrete is cured, adding the prepared seed emulsion into the cured concrete by pressurization.
The concrete in this example is a square concrete block of 1m, and the amount of the seed emulsion per unit area is 10kg/m3。
In the examples 2 to 5, the following examples were conducted,
based on example 1, the high-strength concrete is different in raw material dosage.
The amounts of the raw materials used in examples 1 to 5 are shown in the table below.
TABLE 1 raw material usage of examples 1 to 5
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Cement/kg | 110 | 120 | 123 | 128 | 130 |
| Aggregate/kg | 480 | 490 | 498 | 510 | 520 |
| Sand/kg | 400 | 409 | 413 | 415 | 420 |
| Water/kg | 110 | 115 | 120 | 126 | 130 |
| Fly ash/kg | 25 | 28 | 30 | 32 | 35 |
| Hollow glass fiber/kg | 60 | 65 | 70 | 75 | 80 |
| Silane coupling agent/kg | 90 | 95 | 100 | 105 | 110 |
| Seed emulsion/kg | 30 | 35 | 40 | 43 | 50 |
In the comparative example 1,
a high-strength concrete, based on example 3, is distinguished by the use of 0kg of hollow glass fibers.
The concrete of examples 1 to 5 and comparative example 1 were tested.
The test comprises the following steps:
1. and (3) testing the compressive strength: the compressive strength of the concrete 28d, 72d was measured according to the method specified in GB/T50081-2019.
2. And (3) testing the impermeability: the 72d impermeability was measured according to the stepwise pressure method specified in GB/T50082-2009.
The test results are given in the table below.
TABLE II concrete test results for examples 1-5 and comparative example 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 | |
| 28d compressive strength (Mpa) | 39 | 39.5 | 40 | 39.2 | 38.6 | 32.5 |
| 72d compressive Strength (Mpa) | 49.2 | 48.9 | 51 | 49.3 | 48.7 | 42.5 |
| Impermeability grade P | P10 | P10 | P10 | P10 | P10 | P8 |
The compressive strength of the embodiments 1 to 5 is superior to that of the comparative example 1, so that the hollow glass fiber, the cement, the aggregate, the sand, the water and the fly ash are added to be mixed and stirred, the silicate cement can generate hydration reaction to cure the concrete, the watering maintenance needs to be continued after the curing, the hydration reaction in the concrete is more sufficient, the hydration reaction is more sufficient, the higher the strength of the concrete is, the added hollow glass fiber can provide a water guide channel, the water can more easily enter the cured concrete, and the hydration reaction is promoted to be carried out, so that the strength of the concrete can be effectively improved by adding the hollow glass fiber.
In the case of the example 6, it is shown,
a high-strength concrete is based on example 3, with the difference that the amount of the seed emulsion is 0.
In the case of the example 7, the following examples are given,
a high-strength concrete, based on example 3, is distinguished by the use of 0 silane coupling agent.
In the case of the example 8, the following examples are given,
based on example 3, the high-strength concrete is characterized in that hollow glass fibers are modified by a silane coupling agent, and then the outer pipe wall of the hollow glass fibers is sprayed and cleaned.
In the case of the example 9, the following examples are given,
a high-strength concrete, based on example 3, is distinguished by a length of the hollow glass fibers of 300 mm.
The concrete of examples 6-9 was tested.
The test results are given in the table below.
TABLE III, examples 6-9 concrete test results
| Example 6 | Example 7 | Example 8 | Example 9 | |
| 28d compressive strength (Mpa) | 35.2 | 33.9 | 34.3 | 38.3 |
| 72d compressive Strength (Mpa) | 45.3 | 43.6 | 44.1 | 48.3 |
| Impermeability grade P | P8 | P8 | P8 | P10 |
Combining example 3 and example 6 with table two and table three, it can be seen that in the present application, the seed emulsion forms polymeric microparticles by emulsion polymerization, the high molecular polymerization reaction of the seed emulsion is performed in the tube wall of the hollow glass fiber, the seed emulsion is changed from liquid to solid, and finally the tube diameter of the hollow glass fiber is blocked, so as to improve the water impermeability, and meanwhile, the seed emulsion can fill the gap between the concrete, so as to enhance the water impermeability of the concrete.
Combining the example 3 and the example 7 and combining the second and third tables, it can be seen that in the present application, the silane coupling agent is used to modify the hollow glass fiber, so that the inner side wall surface of the hollow glass fiber is well combined with the seed emulsion, and the formed polymeric particles are adhered to the wall surface of the hollow glass fiber when the seed emulsion enters the concrete, and finally the channel of the hollow glass fiber is blocked, so as to enhance the anti-permeability performance.
By combining the example 3 and the example 8 and combining the second and third tables, it can be seen that the silane modification treatment of the outer side of the hollow glass fiber in the application can ensure that the hollow glass fiber is uniformly distributed in the concrete, the crack resistance is improved, the toughness is improved, and the compressive strength of the concrete is enhanced.
It can be seen by combining example 3 and example 9 and combining tables two and three, the hollow glass fiber has the advantages of light weight, high compressive strength and the like, and when the length of the hollow glass fiber is shorter, the hollow glass fiber can be better dispersed in concrete, so that the water guide effect is achieved, and the compressive strength of the concrete is enhanced.
In a comparative example 2,
a high strength concrete, based on example 3, is distinguished by the fact that the seed emulsion is injected into the concrete without pressurization, and the seed emulsion slowly penetrates into the concrete by coating on the surface of the concrete.
In a comparative example 3,
a high strength concrete based on example 3, except that the modifier for the hollow glass fibers is a titanate modifier.
The concrete of comparative examples 2-3 was tested.
The test results are given in the table below.
TABLE IV, comparative examples 2-3 concrete test results
| Comparative example 2 | Comparative example 3 | |
| 28d compressive strength (Mpa) | 36.5 | 34 |
| 72d compressive Strength (Mpa) | 46.6 | 44 |
| Impermeability grade P | P10 | P8 |
It can be seen from the combination of example 3 and comparative example 2 and the second and fourth tables that, in the application, after the concrete is cured, the water seepage resistance of the concrete is deteriorated due to the added hollow glass fibers, so that the seed emulsion is injected into the concrete in a pressurizing manner, the pore diameter of the hollow glass fibers is blocked, and the water seepage resistance of the concrete is greatly improved.
As can be seen by combining example 3 and comparative example 2 and combining tables two and four, the treatment of the hollow glass fiber with the silane coupling agent in the present application can protect the fiber from abrasion, and can also provide a good interface for the adhesion between the hollow glass fiber and the seed emulsion, so that the seed emulsion can stay in the tube wall of the hollow glass fiber to block the inner tube wall of the hollow glass fiber, thereby achieving the anti-permeability effect.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The high-strength concrete is characterized by being prepared by stirring and mixing the following raw materials in parts by weight:
110 portions of cement and 130 portions of cement,
480 parts of aggregate and 520 parts of cement,
400 portions of sand and 420 portions of sand,
110 portions of water and 130 portions of water,
25-35 parts of fly ash,
60-80 parts of hollow glass fiber.
2. The high-strength concrete according to claim 1, wherein: the concrete curing and curing agent also comprises 30-50 parts of seed emulsion, wherein the seed emulsion is injected into concrete in a pressurizing mode after the concrete is cured and cured, and the seed emulsion comprises the following raw materials in parts by weight: 1-4 parts of acrylic acid, 30-45 parts of methyl methacrylate, 0.2-1.0 part of ammonium persulfate, 0.5-3 parts of sodium dodecyl sulfate and 50-60 parts of water.
3. The high-strength concrete according to claim 1, wherein: the hollow glass fiber is soaked in the silane coupling agent, and the inner side pipe wall of the hollow glass fiber is modified by the silane coupling agent.
4. A high strength concrete according to claim 3, wherein: the outer side pipe wall of the hollow glass fiber is modified by a silane coupling agent.
5. A high strength concrete according to claim 3, wherein: and soaking the hollow glass fiber in a silane coupling agent for silane treatment, heating to 70 ℃, and keeping for 2 hours to obtain the modified hollow glass fiber.
6. The high-strength concrete according to claim 1, wherein: the length of the hollow glass fiber is 140-160 mm.
7. The method for preparing high-strength concrete according to claim 1, wherein: comprises the following steps of (a) carrying out,
s1: mixing cement, aggregate, water, fly ash, sand and the modified hollow glass fiber to obtain a concrete mixture;
s2: pouring the concrete mixture into a mould for pouring;
s3: maintaining at 20 + -5 deg.C for 28 days; and maintaining under the condition that the humidity is not lower than 95%.
8. The method for producing a high-strength concrete according to any one of claims 2 to 7, characterized in that: comprises the following steps of (a) carrying out,
s1: mixing cement, aggregate, water, fly ash, sand and the modified hollow glass fiber to obtain a concrete mixture;
s2: pouring the concrete mixture into a mould for pouring;
s3: maintaining at 20 + -5 deg.C for 28 days; maintaining under the condition that the humidity is not lower than 95%;
s4: and after the concrete is cured, adding the prepared seed emulsion into the cured concrete by pressurization.
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| CN115385628A (en) * | 2022-08-26 | 2022-11-25 | 鸿厦建设有限公司 | High-strength concrete for building construction and processing technology thereof |
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