CN112142386A - Concrete with good wear resistance and preparation method thereof - Google Patents
Concrete with good wear resistance and preparation method thereof Download PDFInfo
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- CN112142386A CN112142386A CN202011326666.8A CN202011326666A CN112142386A CN 112142386 A CN112142386 A CN 112142386A CN 202011326666 A CN202011326666 A CN 202011326666A CN 112142386 A CN112142386 A CN 112142386A
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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
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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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0691—Polyamides; Polyaramides
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1048—Polysaccharides, e.g. cellulose, or derivatives thereof
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2623—Polyvinylalcohols; Polyvinylacetates
-
- 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
- C04B2111/2038—Resistance against physical degradation
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of concrete, and particularly discloses concrete with good wear resistance and a preparation method thereof. The concrete with good wear resistance is prepared from the following raw materials in parts by weight: 220-250 parts of cement; 78-95 parts of fly ash; 56-72 parts of blast furnace slag; 6.2-7.2 parts of a water reducing agent; 665-690 parts of sand; 1080-1150 parts of crushed stone; 5.6-7.7 parts of polyvinyl alcohol; 1.4-2.3 parts of aramid fiber; 105-122 parts of water; the preparation method comprises the following steps: mixing and stirring fly ash, blast furnace slag, sand, broken stone, polyvinyl alcohol and aramid fiber, then adding cement, continuously mixing and stirring, adding a water reducing agent and water, and continuously mixing and stirring to obtain the concrete with good wear resistance. The concrete has the advantages of improving the wear resistance of the concrete and being energy-saving and environment-friendly.
Description
Technical Field
The application relates to the field of concrete, in particular to concrete with good wear resistance and a preparation method thereof.
Background
The concrete is a common material in construction engineering, plays a role in social construction, has wide application and is applied to house construction, road construction and hydraulic engineering construction; with the continuous improvement of the construction technology of hydraulic engineering, people have higher and higher requirements on the concrete used for construction, and the hydraulic engineering needs to be applied for a long time, so the requirement on the durability of the concrete is higher. One of the factors that characterize the durability of concrete is the wear resistance, which reflects the ability of the concrete surface to resist wear.
At present, in order to improve the wear resistance of concrete, an admixture such as a fiber material is often added into the concrete, and the fiber material is utilized to improve the strength of the concrete, so that the wear resistance of the concrete is improved.
However, the inventor finds that the wear resistance of concrete is not obviously improved by simply adding the fiber material when the fiber material is added, and needs to be further improved.
Disclosure of Invention
In order to improve the wear resistance of concrete, the application provides concrete with good wear resistance and a preparation method thereof.
In a first aspect, the concrete with good wear resistance provided by the application adopts the following technical scheme:
the concrete with good wear resistance is prepared from the following raw materials in parts by weight:
220-250 parts of cement;
78-95 parts of fly ash;
56-72 parts of blast furnace slag;
6.2-7.2 parts of a water reducing agent;
665-690 parts of sand;
1080-1150 parts of crushed stone;
5.6-7.7 parts of polyvinyl alcohol;
1.4-2.3 parts of aramid fiber;
105-122 parts of water.
By adopting the technical scheme, the aramid fiber and the polyvinyl alcohol are adopted, the aramid fiber has higher strength and toughness, and the aramid fiber is filled in the concrete to improve the toughness of the concrete, so that the wear resistance and the crack resistance of the concrete are improved; in addition, the blast furnace slag is added into the concrete, so that the cohesiveness of cement mortar is improved, the blast furnace slag further uses slag generated by the iron-making industry, the damage caused by the fact that the slag is directly discharged into the environment is reduced, and the concrete has better wear resistance and durability, so that the waste of the concrete is reduced, and the concrete is energy-saving and environment-friendly.
Preferably, the aramid fiber is a modified aramid fiber, and the preparation method of the modified aramid fiber comprises the following steps: mixing and stirring carboxymethyl chitosan, hydroxypropyl chitosan and water to obtain a mixed solution, heating the mixed solution to 50-65 ℃, adding aramid fiber into the mixed solution, then adding glyoxal, stirring for 2-5 min, soaking the aramid fiber in the mixed solution for 1-1.5 h, taking out the aramid fiber, cleaning and drying to obtain the modified aramid fiber, wherein the weight ratio of the carboxymethyl chitosan to the hydroxypropyl chitosan to the glyoxal to the aramid fiber is (0.6-0.9): 0.2-0.4): 0.3-0.5): 40-50): 10.
Through adopting above-mentioned technical scheme, carboxymethyl chitosan and hydroxypropyl chitosan copolymerization combine in aramid fiber surface, play the bonding ability of reinforcing aramid fiber and cement mortar to improve the wear-resisting and anti-cracking performance of concrete.
Preferably, before the aramid fiber is added into the mixed solution, the aramid fiber is pretreated, and the pretreatment steps are as follows: mixing and stirring magnesium chloride and methanol to obtain a pretreatment solution, adding aramid fiber into the pretreatment solution, soaking the aramid fiber in the mixed solution for 30-40 min, taking out the aramid fiber, cleaning and drying to obtain the pretreated aramid fiber, wherein the weight ratio of the magnesium chloride to the methanol to the aramid fiber is (2.6-3.2): 40-50): 10.
By adopting the technical scheme, the aramid fiber subjected to surface treatment by the magnesium chloride methanol solution can be better combined with carboxymethyl chitosan and hydroxypropyl chitosan, and the wear resistance and crack resistance of concrete are further improved.
Preferably, the aramid fiber is para-aramid fiber.
Through adopting above-mentioned technical scheme, para-aramid fiber self intensity is higher, helps improving the intensity and the wear resistance of concrete.
Preferably, the diameter of the aramid fiber is 7-10 mu m, and the length of the aramid fiber is 12-14 mm.
By adopting the technical scheme, the diameter and the length are beneficial to improving the binding force of the aramid fiber on cement mortar and improving the wear resistance and the crack resistance of concrete.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent.
By adopting the technical scheme, the polycarboxylic acid water reducing agent can effectively improve the compactness of concrete and reduce the internal defects of the concrete, thereby improving the wear resistance of the concrete.
Preferably, the particle size of the sand is 2-3.5 mm.
Preferably, the particle size of the crushed stone is 8-12 mm.
Preferably, the fly ash is class I fly ash.
In a second aspect, the present application provides a method for preparing a concrete with good wear resistance, which adopts the following technical scheme:
the preparation method of the concrete with good wear resistance comprises the following steps:
mixing and stirring fly ash, blast furnace slag, sand, broken stone, polyvinyl alcohol and aramid fiber, then adding cement, continuously mixing and stirring, adding a water reducing agent and water, and continuously mixing and stirring to obtain the concrete with good wear resistance.
In summary, the present application has the following beneficial effects:
1. because this application adopts aramid fiber and polyvinyl alcohol, the toughness that aramid fiber filled in the concrete can improve the concrete plays the effect that improves the wear resistance and the crack resistance ability of concrete, the joining of polyvinyl alcohol helps strengthening the firm degree of aramid fiber in cement mortar to the better wear resistance who improves the concrete through aramid fiber, and then improved the durability of concrete, blast furnace slay has been used to the concrete in addition, play energy-concerving and environment-protective effect.
2. Preferably adopt carboxymethyl chitosan and hydroxypropyl chitosan to modify aramid fiber in this application to before the modification, carry out the preliminary treatment through magnesium chloride methanol solution to aramid fiber's surface, thereby improve aramid fiber and cement mortar's bond strength, and then improve the wear resistance of concrete.
Detailed Description
The present application will be described in further detail with reference to examples.
The polycarboxylic acid water reducing agent is selected from Guangdong Ruian science and technology industry Co., Ltd, model LS-JS;
the para-aramid fiber is selected from Guangdong Dulvong new material application limited company, and has the diameter of 7-10 mu m, the length of 5-7 mm, the length of 12-14 mm and the length of 18-20 mm;
polyvinyl alcohol was purchased from Beijing Wan Hamming science and technology Co., Ltd, model number 2488;
chitosan, carboxymethyl chitosan and hydroxypropyl chitosan are selected from Chitosan CAS number 9012-76-4, carboxymethyl chitosan CAS number 83512-85-0, and hydroxypropyl chitosan CAS number 104673-29-2, from Hubei, such as Nature engineering Co., Ltd.
Examples
Example 1
A preparation method of concrete with good wear resistance comprises the following steps:
adding 78kg of fly ash, 62kg of blast furnace slag, 690kg of sand, 1080kg of broken stone, 5.6kg of polyvinyl alcohol and 1.4kg of para-aramid fiber into a concrete mixer, mixing and stirring for 4min, then adding 250kg of cement, continuing mixing and stirring for 2min, then adding 6.2kg of water reducing agent and 122kg of water, continuing mixing and stirring for 1min, and obtaining the concrete with good wear resistance.
Wherein the length of the para-aramid fiber is 5-7 mm.
Example 2
A preparation method of concrete with good wear resistance comprises the following steps:
adding 95kg of fly ash, 72kg of blast furnace slag, 665kg of sand, 1150kg of broken stone, 6.9kg of polyvinyl alcohol and 2.3kg of para-aramid fiber into a concrete mixer, mixing and stirring for 3min, then adding 220kg of cement, continuing mixing and stirring for 2min, then adding 7.2kg of water reducing agent and 105kg of water, continuing mixing and stirring for 1min, and obtaining the concrete with good wear resistance.
Wherein the length of the para-aramid fiber is 5-7 mm.
Example 3
A preparation method of concrete with good wear resistance comprises the following steps:
adding 85kg of fly ash, 56kg of blast furnace slag, 680kg of sand, 1120kg of broken stone, 7.7kg of polyvinyl alcohol and 1.8kg of para-aramid fiber into a concrete mixer, mixing and stirring for 3min, then adding 236kg of cement, continuing mixing and stirring for 2min, then adding 6.7kg of water reducing agent and 115kg of water, continuing mixing and stirring for 1min, and obtaining the concrete with good wear resistance.
Wherein the length of the para-aramid fiber is 5-7 mm.
In order to clearly show the differences of examples 1 to 3, the raw material ratios of examples 1 to 3 are shown in table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | |
| Cement (kg) | 250 | 220 | 236 |
| Fly ash (kg) | 78 | 95 | 85 |
| Blast furnace slag (kg) | 62 | 72 | 56 |
| Sand (kg) | 690 | 665 | 680 |
| Gravel (kg) | 1080 | 1150 | 1120 |
| Polyvinyl alcohol (kg) | 5.6 | 6.9 | 7.7 |
| Para-aramid fiber (kg) | 1.4 | 2.3 | 1.8 |
| Water (kg) | 122 | 105 | 115 |
| Polycarboxylic acid water reducing agent (kg) | 6.2 | 7.2 | 6.7 |
Example 4
The present embodiment differs from embodiment 3 only in that, in the present embodiment, the para-aramid fiber is a modified aramid fiber, and the preparation method of the modified aramid fiber is as follows: adding 0.16kg of chitosan and 8kg of water into a reaction container, mixing and stirring for 2min to obtain a mixed solution, heating the mixed solution to 50 ℃, adding 2kg of para-aramid fiber into the mixed solution, then adding 0.06kg of glyoxal, continuing stirring for 2min, soaking the para-aramid fiber in the mixed solution for 1h, taking out the para-aramid fiber, washing with water, and drying in a 50 ℃ oven for 1h to obtain the modified aramid fiber.
Example 5
The difference between this example and example 3 is only that, in this example, the para-aramid fiber is modified before being added into the concrete mixer, so as to obtain a modified aramid fiber, and the preparation method of the modified aramid fiber is as follows: adding 0.12kg of carboxymethyl chitosan, 0.04kg of hydroxypropyl chitosan and 8kg of water into a reaction container, mixing and stirring for 2min to obtain a mixed solution, heating the mixed solution to 50 ℃, adding 2kg of para-aramid fiber into the mixed solution, then adding 0.06kg of glyoxal, continuing stirring for 2min, soaking the para-aramid fiber in the mixed solution for 1h, taking out the para-aramid fiber, washing with water, and drying in an oven at 50 ℃ for 1h to obtain the modified aramid fiber.
Example 6
The difference between this example and example 3 is only that, in this example, the para-aramid fiber is modified before being added into the concrete mixer, so as to obtain a modified aramid fiber, and the preparation method of the modified aramid fiber is as follows: adding 0.18kg of carboxymethyl chitosan, 0.08kg of hydroxypropyl chitosan and 10kg of water into a reaction container, mixing and stirring for 2min to obtain a mixed solution, heating the mixed solution to 65 ℃, adding 2kg of para-aramid fiber into the mixed solution, then adding 0.1kg of glyoxal, continuing stirring for 5min, soaking the para-aramid fiber in the mixed solution for 1.5h, taking out the para-aramid fiber, washing with water, and drying in an oven at 50 ℃ for 1h to obtain the modified aramid fiber.
Example 7
The difference between this embodiment and embodiment 3 is only that, in this embodiment, the para-aramid fiber is pretreated before being added into the concrete mixer, and the pretreatment steps are as follows: adding 0.52kg of magnesium chloride and 8kg of methanol into a reaction container, mixing and stirring for 2min to obtain a pretreatment solution, adding 2kg of para-aramid fiber into the pretreatment solution, soaking the para-aramid fiber in the mixed solution for 30min, taking out the para-aramid fiber, washing with water, and drying in a 50 ℃ oven for 1h to obtain the pretreated para-aramid fiber.
Example 8
The difference between this embodiment and embodiment 6 is only that, in this embodiment, the para-aramid fiber is pretreated before the modification treatment, and the pretreatment steps are as follows: adding 0.52kg of magnesium chloride and 8kg of methanol into a reaction container, mixing and stirring for 2min to obtain a pretreatment solution, adding 2kg of para-aramid fiber into the pretreatment solution, soaking the para-aramid fiber in the mixed solution for 30min, taking out the para-aramid fiber, washing with water, and drying in a 50 ℃ oven for 1h to obtain the pretreated para-aramid fiber.
Example 9
The difference between this embodiment and embodiment 6 is only that, in this embodiment, the para-aramid fiber is pretreated before the modification treatment, and the pretreatment steps are as follows: adding 0.64kg of magnesium chloride and 10kg of methanol into a reaction container, mixing and stirring for 2min to obtain a pretreatment solution, adding 2kg of para-aramid fiber into the pretreatment solution, soaking the para-aramid fiber in the mixed solution for 40min, taking out the para-aramid fiber, washing with water, and drying in a 50 ℃ oven for 1h to obtain the pretreated para-aramid fiber.
Example 10
The difference between the embodiment and the embodiment 8 is only that in the embodiment, the length of the para-aramid fiber is 18-20 mm.
Example 11
The difference between the embodiment and the embodiment 8 is only that in the embodiment, the length of the para-aramid fiber is 12-14 mm.
Comparative example
Comparative example 1
The present comparative example differs from example 3 only in that in the present comparative example, the same amount of sand was used instead of the polyvinyl alcohol and the para-aramid fiber.
Comparative example 2
The present comparative example differs from example 3 only in that in the present comparative example, an equal amount of sand was used instead of the para-aramid fiber.
Comparative example 3
The present comparative example differs from example 3 only in that in the present comparative example, an equal amount of sand was used instead of polyvinyl alcohol.
Performance test
According to GB/T50081-2002 standard of mechanical property test method of common concrete, the concrete obtained by the method is subjected to a compressive strength test and a flexural strength test after being cured for 28 days, and test results are recorded in a table 2.
According to JTG E30-2005, Cement concrete abrasion resistance test method, the abrasion resistance of the concrete obtained by the application is tested, and the test results are recorded in Table 2.
According to GB/T50082-2009 test method standards for long-term performance and durability of common concrete, the concrete obtained by the method is subjected to early crack resistance test, the total crack area of the concrete in unit area is tested, and the test results are recorded in Table 2.
TABLE 2
| Compressive strength (MPa) | Flexural strength (MPa) | Amount of wear (kg/m)2) | Total area of cracking (mm)2/m2) | |
| Example 1 | 62.3 | 8.5 | 1.56 | 253 |
| Example 2 | 62.7 | 8.6 | 1.52 | 252 |
| Example 3 | 63 | 8.9 | 1.5 | 248 |
| Example 4 | 64.3 | 9.2 | 1.48 | 245 |
| Example 5 | 65.2 | 10.2 | 1.26 | 233 |
| Example 6 | 65.5 | 10.3 | 1.23 | 236 |
| Example 7 | 63.4 | 9.1 | 1.47 | 242 |
| Example 8 | 67.2 | 11.5 | 1.16 | 227 |
| Example 9 | 66.8 | 11.1 | 1.17 | 229 |
| Example 10 | 67.1 | 10.8 | 1.19 | 224 |
| Examples11 | 67.5 | 12.1 | 0.97 | 210 |
| Comparative example 1 | 56.2 | 6.7 | 2.54 | 464 |
| Comparative example 2 | 57.3 | 7.2 | 2.41 | 441 |
| Comparative example 3 | 58.1 | 7.5 | 2.17 | 351 |
As shown in Table 2, in comparative example 1, no polyvinyl alcohol and para-aramid fiber are added, in comparative example 2, only polyvinyl alcohol is added and no para-aramid fiber is added, in comparative example 3, only para-aramid fiber is added and no polyvinyl alcohol is added, in comparison between comparative examples 1 and 3, the compressive strength and the flexural strength of comparative examples 2 and 3 are higher than those of comparative example 1, the abrasion loss and the total crack area are smaller than those of comparative example 1, in addition, the difference range of comparative example 2 and comparative example 1 is smaller, in comparison with comparative example 3, in comparative examples 1 and 3, the compressive strength and the flexural strength of example 3 are higher, the abrasion loss and the total crack area are smaller, in comparison with example 1, and the difference range of example 3 and comparative example 1 is far larger than that of comparative example 2 and comparative example 1, which shows that the polyvinyl alcohol and the para-aramid fiber are both helpful for improving the strength, The polyvinyl alcohol and the para-aramid fiber have a better effect of improving the performance of the concrete when the polyvinyl alcohol and the para-aramid fiber are added simultaneously, and the reason is that the para-aramid fiber can improve the toughness of the concrete, fill up cracks in the concrete and reduce the defects in the concrete, so that the wear resistance and the crack resistance of the concrete are improved; polyvinyl alcohol can make cement mortar more closely knit to the contact degree of reinforcing para-aramid fiber and cement mortar, thereby strengthen the stability of para-aramid fiber in cement mortar, better performance is to para-aramid fiber's effect.
In example 4, the para-aramid fiber is modified by chitosan, and in examples 5 to 6, the strength, toughness, wear resistance and crack resistance of concrete are not greatly improved by carboxymethyl chitosan and hydroxypropyl chitosan, compared with example 3, the strength, toughness, wear resistance and crack resistance of concrete are greatly improved by example 4, while the strength, toughness, wear resistance and crack resistance of concrete are greatly improved by examples 5 to 6, which indicates that the modification effect of carboxymethyl chitosan and hydroxypropyl chitosan on the para-aramid fiber is more remarkable, probably because in a cement mortar system, the stability of carboxymethyl chitosan and hydroxypropyl chitosan copolymerized and combined on the surface of the aramid fiber is greater than that of chitosan, and the combination of carboxymethyl chitosan and hydroxypropyl chitosan on the aramid fiber plays a role in enhancing the bonding capacity of the para-aramid fiber and cement mortar, and improving the toughness of concrete, the wear resistance and crack resistance of the concrete are improved.
In example 7, the para-aramid fiber is pretreated by using a magnesium chloride methanol solution, and compared with example 3, the concrete in example 7 has small changes in strength, toughness, wear resistance and crack resistance, which indicates that the difference of the influence of the para-aramid fiber on the concrete before and after pretreatment is small; in the examples 8 to 9, after the para-aramid fiber is pretreated with the magnesium chloride methanol solution, the para-aramid fiber is modified with the carboxymethyl chitosan and the hydroxypropyl chitosan, compared with the example 6, the concrete of the examples 8 to 9 has greatly improved strength, toughness, wear resistance and crack resistance, probably because the crystalline structure of the para-aramid fiber is changed after the pretreatment, so that the binding force between the para-aramid fiber and the carboxymethyl chitosan after the copolymerization of the carboxymethyl chitosan and the hydroxypropyl chitosan is stronger, and the binding capacity between the para-aramid fiber and cement mortar is further improved.
The lengths of the para-aramid fibers of the embodiments 8, 10 and 11 are respectively 5 to 7mm, 18 to 20mm and 12 to 14mm, and compared with the embodiments 8 and 10, the concrete of the embodiment 11 has higher toughness, wear resistance and crack resistance, probably because when the length of the para-aramid fibers is 12 to 14mm, the para-aramid fibers can form a fiber mesh structure with stronger constraint force on cement mortar, thereby improving the stability of the concrete.
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 (10)
1. The concrete with good wear resistance is characterized by comprising the following raw materials in parts by weight:
220-250 parts of cement;
78-95 parts of fly ash;
56-72 parts of blast furnace slag;
6.2-7.2 parts of a water reducing agent;
665-690 parts of sand;
1080-1150 parts of crushed stone;
5.6-7.7 parts of polyvinyl alcohol;
1.4-2.3 parts of aramid fiber;
105-122 parts of water.
2. The concrete with good wear resistance as claimed in claim 1, wherein: the aramid fiber is modified aramid fiber, and the preparation method of the modified aramid fiber comprises the following steps: mixing and stirring carboxymethyl chitosan, hydroxypropyl chitosan and water to obtain a mixed solution, heating the mixed solution to 50-65 ℃, adding aramid fiber into the mixed solution, then adding glyoxal, stirring for 2-5 min, soaking the aramid fiber in the mixed solution for 1-1.5 h, taking out the aramid fiber, cleaning and drying to obtain the modified aramid fiber, wherein the weight ratio of the carboxymethyl chitosan to the hydroxypropyl chitosan to the glyoxal to the aramid fiber is (0.6-0.9): 0.2-0.4): 0.3-0.5): 40-50): 10.
3. The concrete with good wear resistance as claimed in claim 2, wherein: before the aramid fiber is added into the mixed liquid, the aramid fiber is pretreated, and the pretreatment steps are as follows: mixing and stirring magnesium chloride and methanol to obtain a pretreatment solution, adding aramid fiber into the pretreatment solution, soaking the aramid fiber in the mixed solution for 30-40 min, taking out the aramid fiber, cleaning and drying to obtain the pretreated aramid fiber, wherein the weight ratio of the magnesium chloride to the methanol to the aramid fiber is (2.6-3.2): 40-50): 10.
4. The concrete with good wear resistance as claimed in claim 1, wherein: the aramid fiber is para-aramid fiber.
5. The concrete with good wear resistance as claimed in claim 1, wherein: the diameter of the aramid fiber is 7-10 mu m, and the length of the aramid fiber is 12-14 mm.
6. The concrete with good wear resistance as claimed in claim 1, wherein: the water reducing agent is a polycarboxylic acid water reducing agent.
7. The concrete with good wear resistance as claimed in claim 1, wherein: the particle size of the sand is 2-3.5 mm.
8. The concrete with good wear resistance as claimed in claim 1, wherein: the particle size of the crushed stone is 8-12 mm.
9. The concrete with good wear resistance as claimed in claim 1, wherein: the fly ash is I-grade fly ash.
10. The preparation method of the concrete with good wear resistance is characterized by comprising the following steps:
mixing and stirring fly ash, blast furnace slag, sand, broken stone, polyvinyl alcohol and aramid fiber, then adding cement, continuously mixing and stirring, adding a water reducing agent and water, and continuously mixing and stirring to obtain the concrete with good wear resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326666.8A CN112142386B (en) | 2020-11-24 | 2020-11-24 | Concrete with good wear resistance and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105533A (en) * | 2021-11-23 | 2022-03-01 | 深圳市中天元实业有限公司 | Energy-saving and environment-friendly concrete and preparation method thereof |
| CN114349429A (en) * | 2022-01-18 | 2022-04-15 | 无锡交通建设工程集团有限公司 | Lightweight concrete |
| CN114956713A (en) * | 2022-03-31 | 2022-08-30 | 昭通市宜昭高速公路投资开发有限公司 | Nonmetal fiber reinforced ultra-high performance concrete |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908483A (en) * | 2016-06-02 | 2016-08-31 | 江苏顺远新材料科技股份有限公司 | Surface grafting modification method of aramid fiber |
| CN109279843A (en) * | 2018-12-08 | 2019-01-29 | 曙光装配式建筑科技（浙江）有限公司 | A kind of environmental friendly regenerated concrete and preparation method thereof |
| CN109898328A (en) * | 2019-03-14 | 2019-06-18 | 赵鑫飚 | A kind of modification of aramid fiber and its processing technology |
| CN111635189A (en) * | 2020-05-19 | 2020-09-08 | 南京紫晶藤节能科技有限公司 | Energy-saving environment-friendly light wallboard and preparation method thereof |
-
2020
- 2020-11-24 CN CN202011326666.8A patent/CN112142386B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908483A (en) * | 2016-06-02 | 2016-08-31 | 江苏顺远新材料科技股份有限公司 | Surface grafting modification method of aramid fiber |
| CN109279843A (en) * | 2018-12-08 | 2019-01-29 | 曙光装配式建筑科技（浙江）有限公司 | A kind of environmental friendly regenerated concrete and preparation method thereof |
| CN109898328A (en) * | 2019-03-14 | 2019-06-18 | 赵鑫飚 | A kind of modification of aramid fiber and its processing technology |
| CN111635189A (en) * | 2020-05-19 | 2020-09-08 | 南京紫晶藤节能科技有限公司 | Energy-saving environment-friendly light wallboard and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 何建新主编: "《新型纤维材料学》", 31 July 2014, 东华大学出版社 * |
| 殷和平等: "《土木工程材料（第2版）》", 31 March 2019, 武汉大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114105533A (en) * | 2021-11-23 | 2022-03-01 | 深圳市中天元实业有限公司 | Energy-saving and environment-friendly concrete and preparation method thereof |
| CN114349429A (en) * | 2022-01-18 | 2022-04-15 | 无锡交通建设工程集团有限公司 | Lightweight concrete |
| CN114349429B (en) * | 2022-01-18 | 2022-09-23 | 无锡交通建设工程集团有限公司 | Lightweight concrete |
| CN114956713A (en) * | 2022-03-31 | 2022-08-30 | 昭通市宜昭高速公路投资开发有限公司 | Nonmetal fiber reinforced ultra-high performance concrete |
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