CN111333377A - High-tensile-strength concrete and preparation method thereof - Google Patents
High-tensile-strength concrete and preparation method thereof Download PDFInfo
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- CN111333377A CN111333377A CN202010155929.7A CN202010155929A CN111333377A CN 111333377 A CN111333377 A CN 111333377A CN 202010155929 A CN202010155929 A CN 202010155929A CN 111333377 A CN111333377 A CN 111333377A
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- 239000004567 concrete Substances 0.000 title claims abstract description 109
- 238000002360 preparation method Methods 0.000 title abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 60
- 239000000835 fiber Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 37
- 239000004917 carbon fiber Substances 0.000 claims abstract description 37
- 239000010881 fly ash Substances 0.000 claims abstract description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004568 cement Substances 0.000 claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 28
- 239000004576 sand Substances 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims abstract description 22
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract description 22
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 59
- 239000000741 silica gel Substances 0.000 claims description 35
- 229910002027 silica gel Inorganic materials 0.000 claims description 35
- 239000002893 slag Substances 0.000 claims description 28
- 230000002745 absorbent Effects 0.000 claims description 15
- 239000002250 absorbent Substances 0.000 claims description 15
- 239000012615 aggregate Substances 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000002956 ash Substances 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 239000002504 physiological saline solution Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000011372 high-strength concrete Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 16
- 239000002699 waste material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011210 fiber-reinforced concrete Substances 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 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
- 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
-
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
-
- 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
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- 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 invention discloses a high tensile strength concrete and a preparation method thereof, wherein the concrete comprises the following raw materials in parts by weight: 600-850 parts of 42.5-grade ordinary cement, 50-100 parts of fly ash, 60-120 parts of steel fiber, 10-20 parts of carbon fiber, 500-650 parts of coarse aggregate, 250-400 parts of sand, 200-240 parts of water, 8-12 parts of water reducing agent, 4-6 parts of hydroxyethyl cellulose and 8-12 parts of NaOH. The concrete component of the invention is simultaneously doped with the steel fiber and the carbon fiber, the combination of the two fibers can fully play the combined action of the metal fiber and the plastic fiber, and simultaneously the steel fiber and the carbon fiber with different sizes can also play the active hybrid effect, thereby obviously improving the tensile strength of the concrete; the fiber adding mode can play a role in inhibiting micro cracks and macro cracks from a microscopic mode to a macroscopic mode. The method has strong pertinence and operability, can ensure the stability of the quality of the concrete, can improve the durability of the concrete, and has remarkable social benefit, economic benefit and environmental benefit.
Description
Technical Field
The invention belongs to the technical field of concrete materials, and particularly relates to high-tensile-strength concrete and a preparation method thereof.
Background
Concrete is the most widely used engineering material in the field of infrastructure. Concrete is a typical material with high compressive and tensile strength. The fact that the tensile strength of concrete is low is an important factor causing the damage of concrete structures, and the application of the concrete is severely limited. The fiber reinforcement can improve the tensile strength of concrete and the durability of a concrete structure. At present, the fiber reinforced concrete is generally doped with a fiber, and the improvement of the tensile strength is very limited. The preparation technology of the fiber concrete is complex, and the production difficulty is large. The fibers can affect the working performance of fresh concrete to a certain extent, and further affect the strength and durability of the concrete. There are differences in the effect of different types and sizes of fibers on the working properties of concrete.
At present, the preparation of fiber concrete is only aimed at single variety of fiber, and the production process of concrete doped with carbon fiber and steel fiber is more complex. There are many factors affecting the formulation of high fiber concrete, such as the kinds and amounts of raw materials and additives, production process, and the kinds and amounts of fibers, and a reasonable production process is necessary to obtain high tensile strength concrete.
The resource recycling of waste building materials and industrial byproducts is a necessary requirement for environmental protection at present. At present, a large amount of fly ash is generated in coal power plants and other industrial production processes, and serious burden is brought to resources and environment. The steel slag generated in the industrial steel-making process is a waste source which cannot be ignored at present. The problem of waste slag treatment and resource utilization of iron and steel enterprises is also more and more emphasized. The application of the fly ash and the steel slag in the field of building materials is an important way for resource utilization of waste materials.
Disclosure of Invention
The invention aims to provide high-tensile-strength concrete using various fibers and certain waste resources as raw materials and a preparation method thereof.
The high tensile strength concrete comprises the following raw materials in parts by weight:
600-850 parts of 42.5-grade ordinary cement, 50-100 parts of fly ash, 60-120 parts of steel fiber, 10-20 parts of carbon fiber, 500-650 parts of coarse aggregate, 250-400 parts of sand, 200-240 parts of water, 8-12 parts of water reducing agent, 4-6 parts of hydroxyethyl cellulose and 8-12 parts of NaOH.
The high tensile strength concrete further comprises 0-200 parts of silica gel according to the mass parts of the raw materials.
The high tensile strength concrete further comprises 0-100 parts of steel slag according to parts by weight of raw materials.
The high tensile strength concrete further comprises 0-10 parts of super absorbent resin according to the mass parts of the raw materials.
The fly ash is I-grade ash meeting the requirements of GB/T1596 fly ash for cement and concrete; the silica gel is fine-pore silica gel, and the specific surface area is 650-750 m2(ii)/g; the water reducing agent is a shrinkage-reducing polycarboxylic acid water reducing agent, and the water reducing rate is 30-45%; the tensile strength of the steel fiber is 1.2GPa, and the length of the steel fiber is 25-40 mm; the tensile strength of the carbon fiber is 3.0GPa, and the length of the carbon fiber is 5-10 mm.
The specific surface area of the steel slag is 300-450 m2Kg, density of 2.8-3.4 g/cm3The activity index meets the technical requirements of GB/T20491-2006 Steel slag powder for cement and concrete; the super absorbent resin is white particles, the particle size distribution is 30-500 mu m, the nominal particle size is 250 mu m, and the water absorption capacity of physiological saline is 50-80 mL/g.
Preferably, the concrete with high tensile strength comprises the following raw materials in percentage by mass: 700-800 parts of 42.5-grade common cement, 80-100 parts of fly ash, 180-200 parts of silica gel, 80-120 parts of steel fiber, 15-20 parts of carbon fiber, 625-650 parts of coarse aggregate, 260-380 parts of sand, 50-100 parts of steel slag, 8-10 parts of super absorbent resin, 200-210 parts of water, 10 parts of water reducer, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH.
Preferably, the concrete with high tensile strength comprises the following raw materials in percentage by mass: 800 parts of 42.5-grade common cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse bone, 260 parts of sand, 100 parts of steel slag, 10 parts of super absorbent resin, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH.
Preferably, 800 parts of 42.5-grade ordinary cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse bone, 260 parts of sand, 100 parts of steel slag, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH.
The preparation method of the concrete with high tensile strength comprises the following steps:
1) mixing cement, coarse aggregate, sand, steel fiber, fly ash, steel slag, super absorbent resin and silica gel according to a set proportion in a formula to obtain a mixture a;
2) mixing water, a water reducing agent, hydroxyethyl cellulose and carbon fibers, and uniformly stirring for 2-4 minutes to obtain a mixed liquid b;
3) adding NaOH into the solution b, and stirring for 2-4 minutes to obtain a solution c;
4) putting the mixture a obtained in the step 1) into a concrete mixer, stirring for 1-3 minutes, adding the solution c into the mixer, and stirring for 4-6 minutes to obtain the high-tensile-strength concrete;
5) curing the fresh concrete prepared in the step 4) according to GB/T50081 and 2002 Standard of mechanical Properties test method of ordinary concrete, and obtaining the hardened concrete test piece.
The invention has the beneficial effects that: 1) NaOH is added into the concrete, so that the NaOH can provide an alkaline environment and promote the hydration of the fly ash and the silica gel in the concrete, thereby improving the strength of the concrete; the steel slag is rich in tricalcium silicate and dicalcium silicate, and can participate in hydration reaction, so that the strength of the concrete is further improved. 2) The concrete component of the invention is simultaneously doped with the steel fiber and the carbon fiber, the combination of the two fibers can fully play the combined action of the metal fiber and the plastic fiber, and simultaneously the steel fiber and the carbon fiber with different sizes can also play the active hybrid effect, thereby obviously improving the tensile strength of the concrete; the fiber adding mode can play a role in inhibiting micro cracks and macro cracks from a microscopic mode to a macroscopic mode. 3) The fly ash, the water reducing agent and the hydroxyethyl cellulose in the components can improve the working performance of concrete, improve the dispersibility of carbon fibers in the concrete, compensate the loss of the working performance of the concrete caused by adding the fibers, improve the resource utilization rate of industrial wastes, reduce the cost of the concrete and be beneficial to environmental protection. 4) The method has strong pertinence and operability, can ensure the stability of the quality of the concrete, can improve the durability of the concrete, and has remarkable social benefit, economic benefit and environmental benefit.
Detailed Description
In all embodiments of the invention the fly ash is class i fly ash; the sand is medium sand, and the fineness modulus is 2.3-3.0; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the water reducing rate is 40%; the water is ordinary tap water. The tensile strength of the steel fiber is 1.2GPa, and the length is 40 mm; the tensile strength of the carbon fiber is 3.0GPa, and the length is 10 mm. The silica gel is fine-pore silica gel with a specific surface area of 700m2(ii)/g; the specific surface area of the steel slag is 411m2Kg, density 3.2 g/cm.
The preparation process of the concrete of the invention comprises the following steps:
1) selecting carbon fiber and steel fiber with proper sizes;
2) mixing cement, coarse aggregate, sand, steel fiber, fly ash, steel slag, silica gel and super absorbent resin according to a set proportion to obtain a mixture a;
3) mixing water, a water reducing agent, hydroxyethyl cellulose and carbon fibers, and uniformly stirring for 3 minutes to obtain a mixed liquid b;
4) adding NaOH into the solution a, and stirring for 3 minutes to obtain a solution c;
5) putting the mixture a obtained in the step 2) into a concrete mixer for stirring for 2 minutes, adding the solution c into the mixer, and stirring for 5 minutes to obtain the high-tensile-strength concrete;
6) curing the fresh concrete prepared in the step 5) according to GB/T50081 and 2002 Standard of mechanical Properties test method of ordinary concrete, and obtaining the hardened concrete test piece.
Example 1
The concrete with high tensile strength in the embodiment comprises the following raw materials in percentage by mass: 800 parts of 42.5-grade ordinary cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse aggregate, 360 parts of sand, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
Example 2
The concrete with high tensile strength in the embodiment comprises the following raw materials in percentage by mass: 700 parts of 42.5-grade common cement, 80 parts of fly ash, 180 parts of silica gel, 120 parts of steel fiber, 15 parts of carbon fiber, 650 parts of coarse aggregate, 380 parts of sand, 200 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
Example 3
The concrete with high tensile strength in the embodiment comprises the following raw materials in percentage by mass: 825 parts of 42.5-grade ordinary cement, 135 parts of fly ash, 0 part of silica gel, 120 parts of steel fiber, 15 parts of carbon fiber, 650 parts of coarse aggregate, 380 parts of sand, 200 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
The difference from example 2 is that no silica gel is added in example 3, the total amount of cement, fly ash and silica gel is the same in examples 2 and 3, and the content of other components is the same in examples 2 and 3.
Example 4
The concrete with high tensile strength in the embodiment comprises the following raw materials in percentage by mass: 800 parts of 42.5-grade common cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse aggregate, 260 parts of sand, 100 parts of steel slag, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
The difference from example 1 is that 100 parts of steel slag was used in place of 100 parts of sand in example 4, and the remaining components were the same as in example 1.
Example 5
The concrete with high tensile strength in the embodiment comprises the following raw materials in percentage by mass: 700 parts of 42.5-grade common cement, 80 parts of fly ash, 180 parts of silica gel, 120 parts of steel fiber, 15 parts of carbon fiber, 650 parts of coarse aggregate, 330 parts of sand, 50 parts of steel slag, 200 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
The difference from example 2 is that 50 parts of steel slag was used in place of 50 parts of sand in example 5, and the remaining components were the same as in example 2.
Example 6
The concrete with high tensile strength in the embodiment comprises the following raw materials in percentage by mass: 800 parts of 42.5-grade common cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse bone, 260 parts of sand, 100 parts of steel slag, 10 parts of super absorbent resin, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
The difference from example 4 is that 10 parts of super absorbent resin was added in example 6 and the remaining components were the same.
Comparative example 1
The concrete with high tensile strength in the comparative example comprises the following raw materials in percentage by mass: 800 parts of 42.5-grade common cement, 100 parts of fly ash, 200 parts of silica gel, 0 part of steel fiber, 0 part of carbon fiber, 625 parts of coarse aggregate, 360 parts of sand, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
The difference compared to example 1 is that this comparative example does not contain steel fibers and carbon fibers, and the remaining components are the same.
Comparative example 2
The concrete with high tensile strength in the comparative example comprises the following raw materials in percentage by mass: 960 parts of 42.5-grade common cement, 0 part of fly ash, 0 part of silica gel, 120 parts of steel fiber, 15 parts of carbon fiber, 650 parts of coarse aggregate, 380 parts of sand, 200 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
The difference compared to example 2 is that the comparative example does not contain fly ash and silica gel, but the mass of cement in the comparative example is the same as the total mass of cement, fly ash and silica gel in example 2.
Comparative example 3
The concrete with high tensile strength in the comparative example comprises the following raw materials in percentage by mass: 700 parts of 42.5-grade common cement, 100 parts of fly ash, 180 parts of silica gel, 120 parts of steel fiber, 0 part of carbon fiber, 650 parts of coarse aggregate, 380 parts of sand, 200 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH. Concrete test pieces were prepared according to the above method.
Table 1 table of raw material composition in examples
The concrete prepared in examples 1 to 6 and comparative examples 1 to 3 were subjected to the working properties and flexural strength tests for 3 days and 28 days, and the test results are shown in Table 2:
TABLE 2 working Properties and tensile Strength of the tensile Strength concretes
As can be seen from the experimental results, comparing example 1 with comparative example 1, it can be seen that comparative example 1 has higher concrete slump without adding carbon fiber and steel fiber, but the flexural strength was significantly reduced in 3 days and 28 days; comparing example 2 with comparative example 2, it can be seen that in comparative example 2, the slump of the concrete is reduced and the flexural strength of the concrete is also reduced in 3 days and 28 days without adding fly ash and silica gel; comparing example 2 with comparative example 3, it can be seen that the slump of comparative example 3 is increased without adding carbon fiber, but the flexural strength is decreased for 3 days and 28 days; comparing example 2 with example 3, it can be seen that the flexural strength of example 3 is reduced to some extent in both 3 days and 28 days without adding silica gel, which indicates that silica gel has a certain increasing effect on the tensile strength of concrete; comparing example 1 with example 4, it can be seen that the flexural strength of example 4 is improved to a certain extent in 3 days and 28 days after the steel slag is added, and the same conclusion can be drawn in comparison example 2 and example 5; comparing example 4 with example 6, it can be seen that the flexural strength was somewhat reduced after 3 days but was somewhat improved after 28 days after the incorporation of the super absorbent resin.
In conclusion, the invention provides a design method and a preparation method of high tensile strength concrete. The silica gel and the steel slag are added in the method, so that the tensile strength of the concrete can be effectively improved; the utilization rate of the industrial waste is effectively improved by using the fly ash and the steel slag. The super absorbent resin improves the later tensile strength of the concrete. The concrete prepared by the method overcomes the defect of doping single type and single size of fiber, and fully improves the tensile strength of the concrete. The complex doping of different types and sizes of fibers (steel fibers and carbon fibers) can inhibit the occurrence and the propagation of cracks from a macro-microscopic angle, and can effectively improve the durability of concrete.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The high-tensile-strength concrete is characterized by comprising the following raw materials in parts by mass:
600-850 parts of 42.5-grade ordinary cement, 50-100 parts of fly ash, 60-120 parts of steel fiber, 10-20 parts of carbon fiber, 500-650 parts of coarse aggregate, 250-400 parts of sand, 200-240 parts of water, 8-12 parts of water reducing agent, 4-6 parts of hydroxyethyl cellulose and 8-12 parts of NaOH.
2. The concrete with high tensile strength as claimed in claim 1, further comprising 0-200 parts by weight of silica gel.
3. The concrete with high tensile strength as claimed in claim 1 or 2, wherein the concrete with high tensile strength further comprises 0-100 parts of steel slag according to parts by weight of raw materials.
4. The concrete with high tensile strength as claimed in claim 3, wherein the concrete with high tensile strength further comprises 0-10 parts by mass of super absorbent resin.
5. The high tensile strength concrete according to claim 2, wherein the fly ash is grade I ash meeting the requirements of GB/T1596 fly ash for use in cement and concrete; the silica gel is fine-pore silica gel, and the specific surface area is 650-750 m2(ii)/g; the water reducing agent is a shrinkage-reducing polycarboxylic acid water reducing agent, and the water reducing rate is 30-45%; the tensile strength of the steel fiber is 1.2GPa, and the length of the steel fiber is 25-40 mm; the tensile strength of the carbon fiber is 3.0GPa, and the length of the carbon fiber is 5-10 mm.
6. The concrete with high tensile strength as claimed in claim 4, wherein the specific surface area of the steel slag is 300-450 m2Kg, density of 2.8-3.4 g/cm3The activity index meets the technical requirements of GB/T20491-2006 Steel slag powder for cement and concrete; the super absorbent resin is white particles, the particle size distribution is 30-500 mu m, the nominal particle size is 250 mu m, and the water absorption capacity of physiological saline is 50-80 mL/g.
7. The high tensile strength concrete according to claim 4, wherein the high tensile strength concrete comprises the following raw materials in percentage by mass: 700-800 parts of 42.5-grade common cement, 80-100 parts of fly ash, 180-200 parts of silica gel, 80-120 parts of steel fiber, 15-20 parts of carbon fiber, 625-650 parts of coarse aggregate, 260-380 parts of sand, 50-100 parts of steel slag, 8-10 parts of super absorbent resin, 200-210 parts of water, 10 parts of water reducer, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH.
8. The high tensile strength concrete according to claim 7, wherein the high tensile strength concrete comprises the following raw materials in percentage by mass: 800 parts of 42.5-grade common cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse bone, 260 parts of sand, 100 parts of steel slag, 10 parts of super absorbent resin, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH.
9. The concrete with high tensile strength as claimed in claim 3, wherein the concrete comprises 800 parts of 42.5-grade ordinary cement, 100 parts of fly ash, 200 parts of silica gel, 80 parts of steel fiber, 20 parts of carbon fiber, 625 parts of coarse bone, 260 parts of sand, 100 parts of steel slag, 210 parts of water, 10 parts of water reducing agent, 5 parts of hydroxyethyl cellulose and 10 parts of NaOH.
10. A method of preparing the high strength concrete according to claim 4, comprising the steps of:
1) mixing cement, coarse aggregate, sand, steel fiber, fly ash, steel slag, super absorbent resin and silica gel according to a set proportion in a formula to obtain a mixture a;
2) mixing water, a water reducing agent, hydroxyethyl cellulose and carbon fibers, and uniformly stirring for 2-4 minutes to obtain a mixed liquid b;
3) adding NaOH into the solution b, and stirring for 2-4 minutes to obtain a solution c;
4) putting the mixture a obtained in the step 1) into a concrete mixer, stirring for 1-3 minutes, adding the solution c into the mixer, and stirring for 4-6 minutes to obtain the high-tensile-strength concrete;
5) curing the fresh concrete prepared in the step 4) according to GB/T50081 and 2002 Standard of mechanical Properties test method of ordinary concrete, and obtaining the hardened concrete test piece.
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| CN202010155929.7A CN111333377A (en) | 2020-03-09 | 2020-03-09 | High-tensile-strength concrete and preparation method thereof |
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| CN202010155929.7A CN111333377A (en) | 2020-03-09 | 2020-03-09 | High-tensile-strength concrete and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718161A (en) * | 2020-07-03 | 2020-09-29 | 苏州工业园区园林绿化工程有限公司 | Concrete with multiple doped steel wastes |
| CN112939562A (en) * | 2021-04-02 | 2021-06-11 | 陕西实丰混凝土有限公司 | Crack-resistant concrete and preparation method thereof |
| CN113620662A (en) * | 2021-08-04 | 2021-11-09 | 业之固工程技术(苏州)有限公司 | Ultrahigh-toughness cement-based composite material |
| CN116553881A (en) * | 2023-03-15 | 2023-08-08 | 东北林业大学 | High-toughness comb plate expansion joint filling concrete |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811884A (en) * | 2010-04-02 | 2010-08-25 | 建研建材有限公司 | High-performance foam concrete and preparation method thereof |
| CN102001846A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Mineral polymeric material based active powder concrete and preparation method thereof |
| CN103819221A (en) * | 2014-01-17 | 2014-05-28 | 北京奥润开元环保科技研究院有限公司 | Concrete block enhancing liquid as well as preparation method and application thereof |
| CN108191351A (en) * | 2018-03-08 | 2018-06-22 | 同济大学 | A kind of ultra-high performance concrete for mixing assorted fibre |
| CN108249862A (en) * | 2018-02-07 | 2018-07-06 | 河南城建学院 | A kind of high rigidity construction material and preparation method |
| CN109553352A (en) * | 2018-12-25 | 2019-04-02 | 广西青龙化学建材有限公司 | High-intensity fiber composite material and its preparation method for decoration element |
| CN110467391A (en) * | 2019-07-11 | 2019-11-19 | 上海复培新材料科技有限公司 | Bridge connecting sewing concrete special powder, its preparation and construction method |
-
2020
- 2020-03-09 CN CN202010155929.7A patent/CN111333377A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001846A (en) * | 2010-03-29 | 2011-04-06 | 中国铁道科学研究院铁道建筑研究所 | Mineral polymeric material based active powder concrete and preparation method thereof |
| CN101811884A (en) * | 2010-04-02 | 2010-08-25 | 建研建材有限公司 | High-performance foam concrete and preparation method thereof |
| CN103819221A (en) * | 2014-01-17 | 2014-05-28 | 北京奥润开元环保科技研究院有限公司 | Concrete block enhancing liquid as well as preparation method and application thereof |
| CN108249862A (en) * | 2018-02-07 | 2018-07-06 | 河南城建学院 | A kind of high rigidity construction material and preparation method |
| CN108191351A (en) * | 2018-03-08 | 2018-06-22 | 同济大学 | A kind of ultra-high performance concrete for mixing assorted fibre |
| CN109553352A (en) * | 2018-12-25 | 2019-04-02 | 广西青龙化学建材有限公司 | High-intensity fiber composite material and its preparation method for decoration element |
| CN110467391A (en) * | 2019-07-11 | 2019-11-19 | 上海复培新材料科技有限公司 | Bridge connecting sewing concrete special powder, its preparation and construction method |
Non-Patent Citations (7)
| Title |
|---|
| ZHENHAI XU: "Effects of nano-silica on hydration properties of tricalcium silicate", 《CONSTRUCTION AND BUILDING MATERIALS》 * |
| 何小维: "《碳水化合物功能材料》", 31 January 2007, 中国轻工业出版社 * |
| 夏冬桃: "混杂纤维增强高性能混凝土断裂能研究", 《混凝土》 * |
| 姚燕: "《水泥与混凝土研究进展 第14届国际水泥化学大会论文综述》", 30 October 2016, 中国建材工业出版社 * |
| 林建好等: "《土木工程材料 第2版》", 31 August 2017, 哈尔滨工程大学出版社 * |
| 王宝民: "《纳米二氧化碳高性能混凝土性能及机理》", 31 May 2012, 辽宁科学技术出版社 * |
| 谢友均: "矿物掺合料对混凝土中氯离子渗透性的影响", 《硅酸盐学报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111718161A (en) * | 2020-07-03 | 2020-09-29 | 苏州工业园区园林绿化工程有限公司 | Concrete with multiple doped steel wastes |
| CN111718161B (en) * | 2020-07-03 | 2022-08-02 | 苏州工业园区园林绿化工程有限公司 | Concrete with multiple doped steel wastes |
| CN112939562A (en) * | 2021-04-02 | 2021-06-11 | 陕西实丰混凝土有限公司 | Crack-resistant concrete and preparation method thereof |
| CN112939562B (en) * | 2021-04-02 | 2022-03-15 | 陕西实丰混凝土有限公司 | Crack-resistant concrete and preparation method thereof |
| CN113620662A (en) * | 2021-08-04 | 2021-11-09 | 业之固工程技术(苏州)有限公司 | Ultrahigh-toughness cement-based composite material |
| CN116553881A (en) * | 2023-03-15 | 2023-08-08 | 东北林业大学 | High-toughness comb plate expansion joint filling concrete |
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