CN113135719A - Ultrahigh water-doped hydraulic anti-abrasion concrete and preparation process thereof - Google Patents
Ultrahigh water-doped hydraulic anti-abrasion concrete and preparation process thereof Download PDFInfo
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- CN113135719A CN113135719A CN202110601443.6A CN202110601443A CN113135719A CN 113135719 A CN113135719 A CN 113135719A CN 202110601443 A CN202110601443 A CN 202110601443A CN 113135719 A CN113135719 A CN 113135719A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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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
- 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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- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides ultra-high water-doped anti-abrasion concrete and a preparation process thereof, wherein the ultra-high water-doped anti-abrasion concrete comprises the following components: 87 to 105kg/m of water3142-150 kg/m cement3176-224 kg/m of fly ash335-60 kg/m silica powder3630-700 kg/m of sand31250-1400 kg/m of crushed stone3. C produced by the invention180The 50-grade concrete meets the engineering design requirements, has high impact and abrasion resistance strength, high strength surplus, low water demand, good deformation performance, small dry shrinkage and low heat insulation temperature rise, and the impact and abrasion resistance strength is more than 1.5 times of that of the existing common impact and abrasion resistance concrete. The hydraulic concrete with low water-cement ratio internal stress, low hydration temperature, greatly improved strength and low cost is prepared by using less cement, larger amount of fly ash and silica powder as composite cementing materials.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to ultra-high hydraulic engineering anti-abrasion concrete and a preparation process thereof.
Background
At present, silicon powder series of anti-abrasion concrete, HF, modified epoxy resin mortar and protective coating which are commonly applied in hydropower engineering in China are proved by a great deal of indoor research and engineering application, but due to the limitations of raw materials, composition formula and technical route, the silicon powder series of anti-abrasion concrete, HF, modified epoxy resin mortar and protective coating also expose various weaknesses which are difficult to overcome in engineering construction and application. The conventional silicon powder series anti-abrasion concrete has the defects of over-quick development of early strength, small increase of middle and later strength, concentrated release of hydration heat, large dry shrinkage and self-drying shrinkage and easy occurrence of cracks; HF is doped, so that the workability of concrete is poor, bleeding and segregation are easy to occur, the sand rate is high, the adaptability is poor, and the anti-abrasion performance cannot meet the requirement; the modified epoxy anti-abrasion mortar and the protective coating still contain more volatile solvent components, so that the workability under humid and water environments is not obviously improved, the flexibility is still insufficient, and hollowing, cracking and flaking are easy to occur. Once the concrete cracks, the integrity of the structure is damaged, the durability of the concrete is reduced, the service function of the concrete is partially or completely lost, and a large amount of manpower and material resources are consumed to reinforce and reinforce the concrete or even rebuild the concrete. The scouring and scouring of hydraulic buildings by high-speed water flow, sand-containing water flow and bed load water flow always is a problem which needs long-term attention and needs to be solved urgently for water conservancy and hydropower construction. The problems and difficulties to be solved urgently are that the anti-abrasion performance of concrete at the abrasion part of a hydraulic structure is improved and the service life of the structure is prolonged by adopting simple, economic and effective measures, and further deep research and test on the anti-abrasion concrete have very important significance.
Disclosure of Invention
In order to solve the technical problems, the invention provides ultra-high water-doped anti-abrasion hydraulic concrete and a preparation process thereof.
The technical scheme adopted by the invention is as follows:
the ultra-high water-doped anti-abrasion concrete comprises the following components:
87 to 105kg/m of water3142-150 kg/m cement3176-224 kg/m of fly ash335-60 kg/m silica powder3，
630-700 kg/m of sand31250-1400 kg/m of crushed stone3。
Preferably, the ultra-high water-doped industrial anti-abrasion concrete further comprises the following components:
4.224-6.120 kg/m of water reducing agent30.1478-0.2448 kg/m of air entraining agent3。
Preferably, the ultra-high water-doped industrial anti-abrasion concrete:
concrete slump: 50 mm-90 mm, 3% -5% of gas content, and 180d impact resistance and wear resistance intensity not less than 15.47h/(kg per square meter).
Preferably, the ultra-high water-doped industrial anti-abrasion concrete adopts the following raw materials: cement: ordinary silicate 42.5
Cement; fly ash: class I, II and III fly ash meeting the national standard requirements; the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
Preferably, the sand is medium sand, and the fineness modulus of the medium sand is 2.4-2.8 mm.
Preferably, the broken stone comprises small stones and medium stones, and the particle size of the small stones is 5-20 mm, and the particle size of the medium stones is 20-40 mm.
The preparation process of the ultra-high water-doped hydraulic anti-abrasion concrete comprises the following steps:
and adding cement, fly ash, silicon powder, sand, broken stone, water, a water reducing agent and an air entraining agent into a stirring pot in proportion and stirring to obtain the ultrahigh-doped high-impact-resistance grinding concrete.
Preferably, the stirring time is from 180s to 240 s.
The ultra-high water-doped hydraulic anti-abrasion concrete or the ultra-high water-doped hydraulic anti-abrasion concrete prepared by the process is used for dams in high-cold high-altitude large-temperature-difference areas.
Preferably, the elevation of the dam in the alpine and high-altitude high-temperature difference area is more than 3000 m, the temperature difference between the morning and the evening is more than 20 ℃, the water flow is more than 40 m/s, and the water flow drop is more than 20 m.
The beneficial effects of the invention include the following:
1. c produced by the invention180The 50-grade concrete meets the engineering design requirements, has high impact and abrasion resistance strength, high strength surplus, low water demand, good deformation performance, small dry shrinkage and low heat insulation temperature rise, and the impact and abrasion resistance strength is more than 1.5 times of that of the existing common impact and abrasion resistance concrete. The unit water consumption breaks through the conventional concrete consumption, the concrete consumption of each formula is less by more than 40kg, the consumption of cementing materials, particularly the cement consumption is greatly reduced, the cost is reduced, the hydration temperature rise is reduced, and the anti-cracking effect is achieved. The hydraulic concrete with low water-cement ratio internal stress, low hydration temperature, greatly improved strength and low cost is prepared by using less cement, larger amount of fly ash and silica powder as composite cementing materials.
2. The ultra-high water-doped hydraulic anti-abrasion concrete or the ultra-high water-doped hydraulic anti-abrasion concrete prepared by the process is used for dams in high-cold high-altitude large-temperature-difference areas. The altitude of the high-cold high-altitude area with large temperature difference is more than 3000 m, the morning and evening temperature difference is more than 20 ℃, the water flow is more than 40 m/s, and the water flow fall is more than 20 m. The concrete has the advantages of high erosion resistance, wear resistance, high integral strength, crack resistance, good compactness, high temperature control and crack resistance and high durability. The adiabatic temperature rise is lower than that of the common abrasion-resistant concrete by about 10 ℃, the dry shrinkage is small, the abrasion-resistant strength is higher by more than 1.5 times, the strength is high, and the cracking resistance is good, so that the concrete can meet the use requirement of the dam in cold and high-altitude areas with large temperature difference.
Detailed Description
The technical solutions of the present invention will be described in detail below with reference to specific examples, but the present invention should not be construed as being limited to the applicable scope thereof.
Example 1
The super high water content anti-abrasion concrete is optimized in compounding ratio. The performance proportion in the table 1 is adopted to optimize the parameters of the ultra-high water-doped hydraulic anti-abrasion concrete.
TABLE 1 comparison result table for laboratory test of high fly ash blending property
TABLE 2 table of the results of the comparative test of the compressive strength of highly doped fly ash and common concrete
TABLE 3 impact-resistant comparative abrasion strength test result table for highly doped fly ash and common concrete
TABLE 4 Experimental results of the comparison of the antifreeze performance test of the highly doped fly ash and the common concrete
TABLE 5 table of comparative tests on deformation performance of highly doped fly ash and common concrete
From the 1-5 test results, the blending ratio design method of the 'equal slurry volume method' is adopted, and the measures of raw material optimization, material combination grading optimization, high-performance water reducing agent doping and the like are combined, so that the blending amount of the prepared fly ash is more than 50%, the blending amount of the micro-bead powder is more than 10%, and the requirements of the dam C are met18040、C18050 impact-resistant and wear-resistant concrete required by concrete. The proportioning effect of 10, 12 is optimal from the viewpoint of abrasion resistance.
Example 2
The ultra-high water-doped anti-abrasion concrete comprises the following components:
90kg/m water3146kg/m cement3182kg/m of fly ash345kg/m of silicon powder3680kg/m of sand31290kg/m of broken stone3。
Preferably, the ultra-high water-doped industrial anti-abrasion concrete further comprises the following components:
4.5kg/m of water reducing agent30.17kg/m of air entraining agent3。
Preferably, the ultra-high water-doped industrial anti-abrasion concrete:
concrete slump: 60mm, 4 percent of gas content and 180d of impact resistance and abrasion resistance which are not less than 15.47h/(kg per square meter).
Example 3
The ultra-high water-doped anti-abrasion concrete comprises the following components:
95kg/m water3148kg/m cement3184kg/m of fly ash355kg/m of silicon powder3690kg/m of sand31390kg/m of crushed stone3。
Preferably, the ultra-high water-doped industrial anti-abrasion concrete further comprises the following components:
water reducing agent 5.120kg/m30.1891kg/m of air entraining agent3。
Preferably, the ultra-high water-doped industrial anti-abrasion concrete:
concrete slump: 80mm, 3 to 5 percent of gas content and 180d of impact resistance and abrasion resistance which are not less than 15.47h/(kg per square meter).
Example 4
The ultra-high water-doped anti-abrasion concrete comprises the following components:
87kg/m of water3Cement 141kg/m3176kg/m of fly ash335kg/m of silicon powder3654kg/m of sand3684kg/m of small stone3684kg/m of medium stone34.224kg/m of water reducing agent30.1478kg/m of air entraining agent3。
4.224-6.120 kg/m of water reducing agent30.1478-0.2448 kg/m of air entraining agent3。
The ultra-high water-doped anti-abrasion hydraulic concrete is prepared from the following raw materials: cement: ordinary Portland 42.5 cement; fly ash: class I, II and III fly ash meeting the national standard requirements; the water reducing agent is a polycarboxylic acid high-performance water reducing agent. The water reducing agent and the air entraining agent are both produced by Jiangsu Subo new material Co.
The ultra-high water-doped hydraulic anti-abrasion concrete or the ultra-high water-doped hydraulic anti-abrasion concrete prepared by the process is used for dams in high-cold high-altitude large-temperature-difference areas.
The altitude of the high-cold high-altitude area with large temperature difference is more than 3000 m, the morning and evening temperature difference is more than 20 ℃, the water flow is more than 40 m/s, and the water flow fall is more than 20 m.
The concrete proportion is shown in table 1 when compared with common concrete.
From the results in tables 6 to 10, C produced by the present invention180The 50-level concrete meets the engineering design requirements, the 180-day compressive strength is close to 90MPa, the impact abrasion strength is more than 15h/(kg per square meter), the strength is high, the water demand is low, the deformation performance is good, the shrinkage on drying is small, the adiabatic temperature rise is low, and the impact abrasion strength is more than 1.5 times of that of the existing common impact abrasion-resistant concrete. The cement consumption of each concrete is reduced by about more than 150kg, the total gelled material consumption is reduced by about 80kg, and the cost of each concrete is saved by about 20 yuan on average; and compared with dam anti-abrasion common concrete, the temperature rise of the concrete in the 28d age is reduced by about 10 ℃, so that the heat productivity of hydraulic large-volume concrete is greatly reduced, temperature control investment measures can be reduced, and the engineering cost is saved. The hydraulic concrete with low water-cement ratio internal stress, low hydration temperature, greatly improved strength and low cost is prepared by using less cement, larger amount of fly ash and silica powder as composite cementing materials.
TABLE 6 comparison of strength results between ordinary and ultra-high-mix anti-abrasion concrete
TABLE 7 table of the results of the comparison of the deformation properties of ordinary anti-abrasion concrete and ultra-high-doped anti-abrasion concrete
TABLE 8 table of the results of the comparison of the deformation properties of ordinary anti-abrasion concrete and ultra-high-doped anti-abrasion concrete
TABLE 9 adiabatic temperature rise comparison of ordinary anti-abrasion concrete and ultra-high-doped anti-abrasion concrete
TABLE 10 comparison of the impact and wear resistance of ordinary and ultra-high blended impact and wear resistant 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 ultra-high water-doped anti-abrasion concrete is characterized by comprising the following components:
87 to 105kg/m of water3142-150 kg/m cement3176-224 kg/m of fly ash335-60 kg/m silica powder3630-700 kg/m of sand31250-1400 kg/m of crushed stone3。
2. The ultra-high water-blended impact-resistant concrete according to claim 1, further comprising the following components:
4.224-6.120 kg/m of water reducing agent30.1478-0.2448 kg/m of air entraining agent3。
3. The ultra-high water-blended anti-abrasion concrete according to claim 1, wherein the ultra-high water-blended anti-abrasion concrete
Concrete slump: 50 mm-90 mm, 3-5% of gas content and 180d of impact resistance and wear resistance strength not less than 15.47h/(kg per square meter).
4. The ultra-high water-doped impact-resistant concrete according to claim 1, which is prepared from the following raw materials: cement: ordinary Portland 42.5 cement; fly ash: class I, II and III fly ash meeting the national standard requirements; the water reducing agent is a polycarboxylic acid high-performance water reducing agent.
5. The ultra-high water-doped impact-resistant concrete according to claim 1, wherein the sand is medium sand, and the fineness modulus of the medium sand is 2.4-2.8 mm.
6. The ultra-high water-doped impact-resistant concrete according to claim 1, wherein the crushed stones comprise small stones and medium stones, and the particle size of the small stones is 5-20 mm, and the particle size of the medium stones is 20-40 mm.
7. The process for preparing the ultra-high water-doped impact-abrasion-resistant concrete according to any one of claims 1 to 6, wherein the concrete preparation process comprises the following steps:
and adding cement, fly ash, silicon powder, sand, broken stone, water, a water reducing agent and an air entraining agent into a stirring pot in proportion and stirring to obtain the ultrahigh-doped high-impact-resistance grinding concrete.
8. The process for preparing ultra-high water-blended impact-resistant concrete according to claim 7, wherein the stirring time is 180s to 240 s.
9. The ultra-high water-blended anti-impact concrete as claimed in any one of claims 1 to 6 or the ultra-high water-blended anti-impact concrete prepared by the process as claimed in any one of claims 7 to 8 is used for dams in high-temperature difference areas with high cold and high altitude.
10. The use of claim 9, wherein the dam in the alpine and high-altitude high temperature difference area has an altitude of more than 3000 m, a morning and evening temperature difference of more than 20 ℃, a water flow of more than 40 m/s and a water flow drop of more than 20 m.
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Cited By (2)
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| CN116553888A (en) * | 2023-05-10 | 2023-08-08 | 西部机场集团建设工程(西安)有限公司 | Anti-scouring wear-resistant concrete and preparation method and application thereof |
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