CN116003067A - High-strength anti-freezing concrete based on modified cement and preparation method thereof - Google Patents
High-strength anti-freezing concrete based on modified cement and preparation method thereof Download PDFInfo
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- CN116003067A CN116003067A CN202310017579.1A CN202310017579A CN116003067A CN 116003067 A CN116003067 A CN 116003067A CN 202310017579 A CN202310017579 A CN 202310017579A CN 116003067 A CN116003067 A CN 116003067A
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- 239000004567 concrete Substances 0.000 title claims abstract description 93
- 239000004568 cement Substances 0.000 title claims abstract description 82
- 238000007710 freezing Methods 0.000 title claims description 14
- 238000002360 preparation method Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 23
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000002528 anti-freeze Effects 0.000 claims abstract description 21
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 18
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003607 modifier Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 34
- 239000004575 stone Substances 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 10
- 230000000996 additive effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000005751 Copper oxide Substances 0.000 claims description 5
- 235000019738 Limestone Nutrition 0.000 claims description 5
- 229910000431 copper oxide Inorganic materials 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- 239000003469 silicate cement Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010438 granite Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 2
- 230000006378 damage Effects 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000010257 thawing Methods 0.000 description 9
- 230000008014 freezing Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910001653 ettringite Inorganic materials 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- 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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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a high-strength antifreeze concrete based on modified cement and a preparation method thereof, wherein the antifreeze concrete is prepared from the following raw materials in parts by weight: 361-415 parts of modified cement, wherein the modified cement is obtained by mixing cement and a modifier according to the weight part ratio of 350-410:2-11, and the modifier is obtained by mixing yttrium oxide powder and copper oxide powder according to the weight part ratio of 0-11:0-11; 0-60 parts of tuff powder; 640-670 parts of quartz sand; 720-750 parts of coarse aggregate; 11-14 parts of water reducer; 20-50 parts of metal wires; 130-160 parts of water. The concrete provided by the invention has excellent frost resistance, ensures excellent mechanical properties, and can solve the problems of insufficient strength, no frost resistance and easiness in cracking and damage of the concrete in low-temperature areas.
Description
Technical Field
The invention relates to the technical field of concrete materials, in particular to high-strength anti-freezing concrete based on modified cement and a preparation method thereof.
Background
The concrete is used as a special quasi-brittle material and is composed of graded aggregate, cement, mortar, pores and the like, and the concrete has a complex internal structure, multiple scales and unique physical and mechanical properties. With the long-term development of engineering construction, the durability of concrete structures has become a hot spot in research in the field of engineering structures today. The concrete structure damage causes are arranged according to importance, such as steel bar corrosion, freeze thawing damage, physical and chemical effects of corrosion environment, and the like. Therefore, in severe cold areas of China, the freeze thawing cycle effect is often one of the main factors causing concrete damage, and the existing concrete is easy to shrink in winter to cause cracking damage. In order to improve the frost resistance of concrete, an air entraining agent is generally added, but the air entraining agent is added to reduce the compressive strength and the splitting tensile strength of the concrete, so that the concrete with the frost resistance improved and excellent mechanical properties ensured is required.
Disclosure of Invention
The invention aims at solving the problems of cracking and damage and strength reduction of concrete in low-temperature areas and provides high-strength anti-freezing concrete based on modified cement.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-strength antifreeze concrete based on the modified cement is prepared from the following raw materials in parts by weight:
361-415 parts of modified cement, wherein the modified cement is obtained by mixing cement and a modifier according to the weight part ratio of 350-410:2-11, and the modifier is obtained by mixing yttrium oxide powder and copper oxide powder according to the weight part ratio of 0-11:0-11;
0-60 parts of tuff powder;
640-670 parts of quartz sand;
720-750 parts of coarse aggregate;
11-14 parts of water reducer;
20-50 parts of metal wires;
130-160 parts of water.
In the above-mentioned technical scheme, the method comprises the steps of,
the modified cement is obtained by mixing cement and a modifier according to the weight part ratio of 350-410:5-11, and the modifier is obtained by mixing yttrium oxide powder and copper oxide powder according to the weight part ratio of 2-5:3-6;
the weight portion of the tuff powder is 30-60 portions.
Preferably, the high-strength antifreeze concrete is prepared from the following raw materials in parts by weight:
361-397 parts of modified cement, wherein the modified cement is prepared by mixing cement, yttrium oxide powder and copper oxide powder according to the weight part ratio of 350-390:3-5:4-6;
40-60 parts of tuff powder;
650-670 parts of quartz sand;
720-740 parts of coarse aggregate;
11-13 parts of water reducer;
30-50 parts of metal wires, preferably a mixture of copper wires and aluminum wires;
140-160 parts of water.
Preferably, the high-strength antifreeze concrete is prepared from the following raw materials in parts by weight:
379-397 parts of modified cement, wherein the modified cement is prepared by mixing cement, yttrium oxide powder and copper oxide powder according to the weight part ratio of 370-390:3-4:4-5;
40-50 parts of tuff powder;
650-660 parts of quartz sand;
730-740 parts of coarse aggregate;
12-13 parts of water reducer;
30-40 parts of metal wires, preferably a mixture of copper wires and aluminum wires;
140-150 parts of water.
The high-strength antifreeze concrete according to any one of the above,
the coarse aggregate is crushed stone, the crushed stone is any one or more selected from basalt crushed stone, limestone crushed stone and granite crushed stone, and the particle size of the crushed stone is 5-20mm continuous grading; preferably, the crushed stone adopts limestone crushed stone;
the cement is silicate cement, and the cement is prepared from the following materials,
the water reducer is a polycarboxylate water reducer;
the yttrium oxide powder and the copper oxide powder are in nanometer level, preferably the average particle size of the nanometer yttrium oxide is 20-30nm, and the average particle size of the nanometer copper oxide is 40-60nm;
the particle size of the fine aggregate is 30-35 mu m;
the particle size of the quartz sand is 0.125-0.85mm;
the metal wire is selected from any one or more of copper wires, aluminum wires, iron wires and stainless steel wires; the length of the metal wire is 3-65mm or 3-55mm or 4-45mm or 4-35mm, and the cross section diameter of the metal wire is 0.2-3.0mm or 0.2-2.5mm or 0.25-2.3mm or 0.3-1.8mm or 0.5-1.5mm or 0.5-1.0mm.
Preferably, the metal wires are selected from copper wires and aluminum wires, and the copper wires and the aluminum wires are mixed according to any weight part ratio, preferably equal mass mixing;
preferably, the metal wire is a waste wire core;
the metal wire is cut into short wires with the length of 4-8mm and/or long wires with the length of 25-35mm,
preferably, the filaments are curved in a wave shape and the filaments are wound into a circle.
The invention also provides a preparation method of the high-strength antifreeze concrete, which comprises the following steps:
firstly, uniformly mixing and stirring the modifier and the cement to obtain modified cement, then adding the modified cement and the rest raw materials into a stirrer, and stirring for 20-90min or 25-50min to obtain the modified cement.
The invention also provides a preparation method of the high-strength antifreeze concrete according to any one of the above steps, which comprises the following steps:
step one, preparing modified cement: mixing the modifier with cement, and stirring and mixing uniformly;
step two, preparing a secondary mixture: pouring quartz sand, coarse aggregate and metal wires into a stirrer, and uniformly stirring to obtain a secondary mixture;
preparing a concrete additive: mixing and stirring the water reducer and tuff powder uniformly to obtain a concrete additive;
and step four, preparing concrete: pouring the obtained modified cement, secondary mixture and concrete admixture into a stirrer, adding water, stirring uniformly, and placing into a mould for curing after stirring is finished to obtain the high-strength antifreeze concrete.
Preferably, in the first step, yttrium oxide powder and silicon cement are mixed, dispersed and stirred uniformly to obtain a primary mixture, and then the primary mixture and copper oxide powder are mixed and stirred uniformly to obtain modified cement.
Preferably, the preparation method comprises the following steps:
step one, preparing modified cement: mixing yttrium oxide powder with cement, dispersing by microwaves and stirring for 3-7 minutes simultaneously to obtain a primary mixture, and mixing and stirring the primary mixture with copper oxide powder for 8-12 minutes to obtain modified cement;
step two, preparing a secondary mixture: pouring quartz sand, coarse aggregate and metal wires into a stirrer, and stirring for 5-10 minutes to obtain a secondary mixture;
preparing a concrete additive: mixing and stirring the polycarboxylate water reducer and tuff powder for 2-4 minutes to obtain a concrete additive;
and step four, preparing concrete: pouring the obtained modified cement, secondary mixture and concrete admixture into a stirrer, adding water in equal quantity for a plurality of times, stirring for 6-9 minutes each time, and placing the mixture into a mould for curing after stirring is finished to obtain the high-strength anti-freezing concrete.
The beneficial effects of the invention are as follows:
1. the invention can achieve the purposes of reducing cement consumption, promoting waste utilization and improving slurry fluidity by adding the finely ground tuff powder as the mineral external admixture, and is beneficial to the development of compressive strength and splitting tensile strength after concrete curing.
2. The invention prepares the modified cement by adopting the common cement, the yttrium oxide powder and the copper oxide powder, the hydration reaction of the modified cement is sufficient, the yttrium oxide powder can induce to generate C-S-H gel, so that the C-S-H gel grows in a columnar direction, the internal pore structure of the concrete is optimized, the small-pore harmful pores are thinned, the improvement effect on the vicinity of a concrete interface transition area is more obvious, the defects are reduced, the crystal orientation is optimized, and the strength and the compactness of the vicinity of the interface transition area are improved; the copper oxide powder is doped to generate more ettringite in the hydration reaction of cement, the morphology is coarse and the product is in a rod shape, and the main reason is that the copper oxide powder can promote the secondary hydration reaction, consume intermediate product calcium hydroxide, form a network interweaved skeleton structure in concrete, improve the mechanical properties of the concrete such as compressive strength, and inhibit water from entering the concrete under the freezing and thawing environment so as to improve the freezing resistance of the concrete.
3. According to the invention, the metal wire is added into the concrete, and the metal wire can adopt the waste wire core, so that the recycling of waste materials is realized, and the environment is protected. Meanwhile, as the volume of the common concrete expands after the internal moisture is frozen in the freezing and thawing cycle process, stress is generated, and the common concrete is damaged due to repeated action or internal stress exceeding the tensile strength of the concrete, the added metal wire can play a role in reinforcing a concrete matrix through the pulling action of the metal wire and the internal structure of the concrete, so that the occurrence of cracks is restrained, and the crack resistance of the concrete is improved; the bent metal wires (such as circles) are mainly used for delaying the expansion of cracks, transmitting and bearing the shearing force at the cracks, relieving the stress and further improving the bearing capacity and the deformability of the concrete. The incorporation of the metal wire greatly improves the splitting tensile strength and the frost resistance of the concrete.
Detailed Description
The technical scheme of the invention is further described below by referring to examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The experimental methods in the following examples are conventional methods unless otherwise specified; the materials used, unless otherwise specified, are all conventional in the art and are commercially available.
Example 1
The main raw materials adopted in the embodiment of the invention are as follows:
portland cement: the relative density of the cement is 3.12g/cm by adopting P.O42.5R ordinary Portland cement (early strength type) 3 Specific surface area of 321m 2 The stability is good;
nano yttrium oxide: average particle diameter of 20-30nm and specific surface area of 61m 2 Per gram, bulk density of 0.2g/cm 3 The crystal form is spherical, and the color is white;
nano copper oxide: average particle diameter of 50nm and specific surface area of 120m 2 Per gram, bulk density of 0.34g/cm 3 The crystal form is spherical, and the color is black;
the grain size of the finely ground tuff powder is between 30 and 35 mu m, and the density is 2.1g/cm 3 Specific surface area of 437m 2 /kg；
The quartz sand has a particle diameter of 0.125-0.85mm and a specific gravity of 2.66g/cm 3 ；
The broken stone adopts limestone broken stone, the grain diameter is 5-20mm, the continuous grading is carried out, and the crushing index is 4.8%;
the water reducer is a polycarboxylic acid high-performance water reducer, so that the workability of the concrete is improved, the water consumption is reduced, and the compressive strength of the concrete is enhanced;
the water is common tap water;
the metal wire adopts a waste wire core mixture and consists of a large number of collected fine copper wires and fine aluminum wires in equal mass ratio.
The preparation method of the high-strength antifreeze concrete comprises the following steps:
step one, preparing modified cement: mixing nano yttrium oxide with silicate cement, dispersing by microwave and stirring for 3-7 minutes simultaneously to obtain a primary mixture, and mixing and stirring the primary mixture with nano copper oxide for 8-12 minutes to obtain modified cement;
step two, preparing a secondary mixture: pouring quartz sand, broken stone and waste wire cores into a stirrer, and stirring for 5-10 minutes to obtain a secondary mixture;
preparing a concrete additive: mixing and stirring the polycarboxylic acid high-performance water reducer and the finely ground tuff for 2-4 minutes to obtain a concrete additive;
and step four, preparing concrete: pouring the obtained modified cement, secondary mixture and concrete admixture into a stirrer, adding water in equal amount for three times, stirring for 6-9 minutes each time, and placing into a mould for curing after stirring is finished to obtain the required high-strength anti-freezing concrete.
Concrete materials of experimental groups 1 to 12 in table 1 were prepared by the above method. The formulation of experimental group 12 was the same as experimental group 1, but the preparation method adopted the common preparation method: the modified cement and the rest raw materials are added into a stirrer at one time, and then all water is added for stirring for 25-41min.
The wires in experimental group 2 were: the copper wires are cut into short wires with the length of 4-8mm, the aluminum wires are cut into filaments with the length of 25-35mm, and the filaments are not bent.
The wires in experimental groups 1, 3-12 were: the copper wire is cut into short wires with the length of 4-8mm and is bent into wave shape, and the aluminum wire is cut into long wires with the length of 25-35mm and is wound into a round shape.
The specific formulation is shown in table 1:
TABLE 1
Performance testing of the concrete materials of table 1:
compressive strength and cleavage tensile strength: the compressive strength and the splitting tensile strength of the standard test block for curing 7d and 28d are measured by referring to a standard test block manufactured by GB/T50081-2002 standard method for testing the mechanical properties of common concrete;
anti-freeze performance test: and (3) manufacturing a standard test block by referring to GB/T50082-2009 Standard for test methods of long-term performance and durability of ordinary concrete, testing by adopting a quick freezing method, and evaluating the freezing resistance through the maximum freeze-thawing cycle times.
The test results are shown in Table 2:
TABLE 2
From the experimental results in tables 1 and 2, except that the compressive strength, the splitting tensile strength and the frost resistance of the concrete in the experimental groups 7 and 11 can not meet the performance requirements of the high-strength frost-resistant concrete, the concrete in the other experimental groups can meet the performance requirements of the high-strength frost-resistant concrete, and the concrete can be used in practical engineering application, and has good application prospects. The concrete effect of the experimental groups 2 and 3 is particularly remarkable, and the concrete performance of the experimental group 3 is optimal. The 7d split tensile strength, the 28d split tensile strength, the 7d compressive strength, the 28d compressive strength and the maximum freeze thawing times of the high-strength antifreeze concrete based on the modified cement of the experimental groups 1 to 4 are all superior to the corresponding performances of the experimental groups 5 to 12.
The modified cement component in the experimental group 5 removes nano copper oxide, and the modified cement component in the experimental group 6 removes nano yttrium oxide, so that the cement modification effect is poorer, and the strength and the freezing resistance are reduced compared with the cement modification effect in the experimental group 1; in the experimental group 7, cement is not modified, and compared with the experimental group 1, the cement hydration reaction is insufficient, the quantity of the generated C-S-H gel and rod-shaped ettringite is drastically reduced, so that the compactness of the internal structure of the concrete is reduced, and the compressive strength, the splitting tensile strength and the maximum freeze thawing cycle times are greatly reduced.
The raw materials of the experimental group 8 are not added with the fine ground limestone powder, so that the workability of the concrete during mixing is reduced, and compared with the experimental group 1, the mechanical property and the durability are reduced; only fine copper wires are in the experimental group 9, only fine aluminum wires are in the experimental group 10, and the experimental group shows poorer compression resistance, splitting tensile strength and freezing resistance when only one metal wire is used compared with the experimental group 1; the waste wire core mixture is removed from the raw materials of the experiment group 11, and on the basis of the experiment group 9 and the experiment group 8, the concrete strength and the maximum freeze thawing cycle times are further reduced, which shows that the mixed wire cores are scattered in the concrete and are mutually attached with the internal structure, so that the crack resistance of the mixed wire cores in the freeze thawing environment is improved; in the preparation method of the experimental group 12, except that the preparation of the modified cement is the same as that of the experimental group 1, the modified cement and other materials are added into a stirrer at one time by adopting a common preparation method, and all water is added for stirring.
Claims (10)
1. The high-strength antifreeze concrete based on the modified cement is characterized by being prepared from the following raw materials in parts by weight:
361-415 parts of modified cement, wherein the modified cement is obtained by mixing cement and a modifier according to the weight part ratio of 350-410:2-11, and the modifier is obtained by mixing yttrium oxide powder and copper oxide powder according to the weight part ratio of 0-11:0-11;
0-60 parts of tuff powder;
640-670 parts of quartz sand;
720-750 parts of coarse aggregate;
11-14 parts of water reducer;
20-50 parts of metal wires;
130-160 parts of water.
2. The high strength antifreeze concrete of claim 1, wherein: wherein,,
the modified cement is obtained by mixing cement and a modifier according to the weight part ratio of 350-410:5-11, and the modifier is obtained by mixing yttrium oxide powder and copper oxide powder according to the weight part ratio of 2-5:3-6;
the weight portion of the tuff powder is 30-60 portions.
3. The high strength antifreeze concrete of claim 1, wherein: the composite material is prepared from the following raw materials in parts by weight:
361-397 parts of modified cement, wherein the modified cement is prepared by mixing cement, yttrium oxide powder and copper oxide powder according to the weight part ratio of 350-390:3-5:4-6;
40-60 parts of tuff powder;
650-670 parts of quartz sand;
720-740 parts of coarse aggregate;
11-13 parts of water reducer;
30-50 parts of metal wires, preferably a mixture of copper wires and aluminum wires;
140-160 parts of water.
4. The high strength antifreeze concrete of claim 1, wherein: the composite material is prepared from the following raw materials in parts by weight:
379-397 parts of modified cement, wherein the modified cement is prepared by mixing cement, yttrium oxide powder and copper oxide powder according to the weight part ratio of 370-390:3-4:4-5;
40-50 parts of tuff powder;
650-660 parts of quartz sand;
730-740 parts of coarse aggregate;
12-13 parts of water reducer;
30-40 parts of metal wires, preferably a mixture of copper wires and aluminum wires;
140-150 parts of water.
5. The high strength antifreeze concrete of any of claims 1 to 4, wherein:
the coarse aggregate is crushed stone, the crushed stone is any one or more selected from basalt crushed stone, limestone crushed stone and granite crushed stone, and the particle size of the crushed stone is 5-20mm continuous grading; preferably, the crushed stone adopts limestone crushed stone;
the cement is silicate cement, and the cement is prepared from the following materials,
the water reducer is a polycarboxylate water reducer;
the yttrium oxide powder and the copper oxide powder are in nanometer level, preferably the average particle size of the nanometer yttrium oxide is 20-30nm, and the average particle size of the nanometer copper oxide is 40-60nm;
the particle size of the fine aggregate is 30-35 mu m;
the particle size of the quartz sand is 0.125-0.85mm;
the metal wire is selected from any one or more of copper wires, aluminum wires, iron wires and stainless steel wires; the length of the metal wire is 3-65mm or 3-55mm or 4-45mm or 4-35mm, and the cross section diameter of the metal wire is 0.2-3.0mm or 0.2-2.5mm or 0.25-2.3mm or 0.3-1.8mm or 0.5-1.5mm or 0.5-1.0mm.
6. The high strength antifreeze concrete of claim 5, wherein:
the metal wires are selected from copper wires and aluminum wires, and the copper wires and the aluminum wires are mixed according to any weight part ratio, preferably equal mass mixing;
preferably, the metal wire is a waste wire core;
the metal wire is cut into short wires with the length of 4-8mm and/or long wires with the length of 25-35mm,
preferably, the filaments are curved in a wave shape and the filaments are wound into a circle.
7. A method for preparing the high-strength antifreeze concrete according to any one of claims 1 to 6, comprising the steps of:
firstly, uniformly mixing and stirring the modifier and the cement to obtain modified cement, then adding the modified cement and the rest raw materials into a stirrer, and stirring for 20-90min or 25-50min to obtain the modified cement.
8. A method for preparing the high-strength antifreeze concrete according to any one of claims 1 to 6, comprising the steps of:
step one, preparing modified cement: mixing the modifier with cement, and stirring and mixing uniformly;
step two, preparing a secondary mixture: pouring quartz sand, coarse aggregate and metal wires into a stirrer, and uniformly stirring to obtain a secondary mixture;
preparing a concrete additive: mixing and stirring the water reducer and tuff powder uniformly to obtain a concrete additive;
and step four, preparing concrete: pouring the obtained modified cement, secondary mixture and concrete admixture into a stirrer, adding water, stirring uniformly, and placing into a mould for curing after stirring is finished to obtain the high-strength antifreeze concrete.
9. The method of manufacturing according to claim 8, wherein:
in the first step, yttrium oxide powder and silicon cement are mixed, dispersed and stirred uniformly to obtain a primary mixture, and then the primary mixture and copper oxide powder are mixed and stirred uniformly to obtain modified cement.
10. The method of preparing as claimed in claim 9, comprising the steps of:
step one, preparing modified cement: mixing yttrium oxide powder with cement, dispersing by microwaves and stirring for 3-7 minutes simultaneously to obtain a primary mixture, and mixing and stirring the primary mixture with copper oxide powder for 8-12 minutes to obtain modified cement;
step two, preparing a secondary mixture: pouring quartz sand, coarse aggregate and metal wires into a stirrer, and stirring for 5-10 minutes to obtain a secondary mixture;
preparing a concrete additive: mixing and stirring the polycarboxylate water reducer and tuff powder for 2-4 minutes to obtain a concrete additive;
and step four, preparing concrete: pouring the obtained modified cement, secondary mixture and concrete admixture into a stirrer, adding water in equal quantity for a plurality of times, stirring for 6-9 minutes each time, and placing the mixture into a mould for curing after stirring is finished to obtain the high-strength anti-freezing concrete.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186901A (en) * | 2016-06-29 | 2016-12-07 | 长江水利委员会长江科学院 | A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities |
| CN106698992A (en) * | 2017-01-10 | 2017-05-24 | 广西壮族自治区水利科学研究院 | Anti-crack corrosion-resistant concrete admixture as well as preparation and application of anti-crack corrosion-resistant concrete admixture |
-
2023
- 2023-01-06 CN CN202310017579.1A patent/CN116003067A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106186901A (en) * | 2016-06-29 | 2016-12-07 | 长江水利委员会长江科学院 | A kind of tuff-powder grinding coagulation soil being applicable to high altitude localities |
| CN106698992A (en) * | 2017-01-10 | 2017-05-24 | 广西壮族自治区水利科学研究院 | Anti-crack corrosion-resistant concrete admixture as well as preparation and application of anti-crack corrosion-resistant concrete admixture |
Non-Patent Citations (3)
| Title |
|---|
| 吴福飞等: "纳米金属氧化物对水泥基材料力学性能的增强效应", 《科学技术与工程》, vol. 20, no. 25, 8 September 2020 (2020-09-08), pages 10437 - 10443 * |
| 杨深，天津科技翻译出版公司: "《建筑七千年》", vol. 1, 31 July 1990, pages: 348 * |
| 赵再琴等，北京理工大学出版社: "《建筑材料》", vol. 1, 31 October 2020, pages: 96 - 97 * |
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