CN115893955A - Underwater concrete containing high-titanium heavy slag - Google Patents
Underwater concrete containing high-titanium heavy slag Download PDFInfo
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- CN115893955A CN115893955A CN202211713115.6A CN202211713115A CN115893955A CN 115893955 A CN115893955 A CN 115893955A CN 202211713115 A CN202211713115 A CN 202211713115A CN 115893955 A CN115893955 A CN 115893955A
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- 239000002893 slag Substances 0.000 title claims abstract description 135
- 239000004567 concrete Substances 0.000 title claims abstract description 129
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 94
- 239000010936 titanium Substances 0.000 title claims abstract description 94
- 239000000843 powder Substances 0.000 claims abstract description 39
- 239000010881 fly ash Substances 0.000 claims abstract description 35
- 239000004575 stone Substances 0.000 claims abstract description 32
- 239000004576 sand Substances 0.000 claims abstract description 31
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004568 cement Substances 0.000 claims abstract description 27
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000000979 retarding effect Effects 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 239000010754 BS 2869 Class F Substances 0.000 claims description 2
- 239000002910 solid waste Substances 0.000 abstract description 19
- 238000005204 segregation Methods 0.000 abstract description 7
- 239000006185 dispersion Substances 0.000 abstract description 6
- 239000003973 paint Substances 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 15
- 230000000996 additive effect Effects 0.000 description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 13
- 229910052698 phosphorus Inorganic materials 0.000 description 13
- 239000011574 phosphorus Substances 0.000 description 13
- 238000010276 construction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 206010016807 Fluid retention Diseases 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 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 belongs to the technical field of cast-in-place concrete, and particularly relates to underwater concrete containing high-titanium heavy slag. The paint comprises the following components in parts by mass: 250 to 370 portions of cement, 80 to 95 portions of fly ash, 50 to 60 portions of phosphorous slag powder, 970 to 1110 portions of high titanium heavy slag sand, 800 to 865 portions of high titanium heavy slag stone, 190 portions of water and 8.51 to 12.97 portions of admixture; the strength grade of the underwater concrete is C25-C40. The invention uses a large amount of industrial solid wastes of high titanium heavy slag sand, high titanium heavy slag stone, fly ash and phosphorous slag powder, the weight ratio of the solid wastes reaches more than 80 percent, and the solid wastes and cement are effectively combined by adjusting the using amount of each component, so that the obtained underwater concrete not only has high cohesive force, dispersion resistance and segregation resistance, but also has the characteristics of self-leveling and self-compacting under water to form high-quality and uniform concrete.
Description
Technical Field
The invention belongs to the technical field of cast-in-place concrete, and particularly relates to underwater concrete containing high-titanium heavy slag.
Background
In recent years, with the rapid development of the concrete industry, in engineering construction, the application of the concrete technology creates powerful conditions for optimizing engineering construction and improving the engineering construction progress. With the differentiation and specialization of different engineering construction requirements, the requirements on the type and technical performance of concrete are higher. The hole pile formed by impacting or rotary digging is used as the deep foundation of the building engineering, is not limited by geological conditions, the height of underground water level, the size and the length of the pile diameter, has the advantages of high bearing capacity, less pollution, low construction cost and the like, and is increasingly and widely applied to industrial and civil buildings.
A large amount of muddy water is accumulated in the hole pile for punching or rotary digging hole forming, common concrete is adopted for pouring, concrete segregation and dispersion can be caused, quality accidents such as honeycomb, cavity, mud clamping or pile breaking and the like occur on the pile body, the engineering quality is seriously influenced, the construction period is delayed, and great economic loss can be caused. The underwater concrete pouring construction needs to be carried out by adopting underwater concrete for impact hole forming or rotary drilling hole forming, the underwater concrete aims at improving the properties of a material system, and the new concrete technology is more widely applied to pile foundation construction engineering.
The underwater concrete is generally poured by a conduit method, and the principle is that the concrete is passed through a rigid pipeline which is vertically arranged in a hole pile and is hermetically connected, the bottom of the pipeline is embedded into the poured concrete mixture at a proper depth, and under the action of a certain drop pressure, the concrete mixture props against the slurry on the concrete mixture to gradually rise to form a continuous and compact concrete pile body. The underwater concrete is formed underwater, the construction conditions are harsh, and continuous construction is required to prevent pile breakage; the underwater concrete for pouring the pile foundation meets the requirements of viscosity, namely, the cement does not run off in water, and the aggregate does not segregate; meanwhile, the underwater concrete cannot be vibrated, and the underwater concrete needs to meet the self-leveling and self-compacting performances, so that the underwater concrete for pouring the pile foundation has good workability, namely good cohesiveness, water retention and fluidity. In conclusion, the underwater concrete is required to have high cohesive force, dispersion resistance and segregation resistance, and has the characteristics of underwater self-leveling, self-compaction and high quality and uniformity.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention provides an underwater concrete containing high-titanium heavy slag, which on one hand largely utilizes industrial solid wastes of high-titanium heavy slag sand, high-titanium heavy slag stone, fly ash and phosphorous slag powder, wherein the weight ratio of the solid wastes reaches more than 80%, and the solid wastes and cement are effectively combined by adjusting the using amount of each component, so that the obtained concrete not only has high cohesive force, dispersion resistance and segregation resistance, but also has the characteristics of high quality and uniformity due to underwater self-leveling and self-compacting. On the other hand, on the premise that more than 80% of industrial solid waste high-titanium heavy slag sandstone, fly ash and phosphorus slag powder are used, the better workability and mechanical property of the concrete are kept, and the underwater pouring requirement of the pile foundation concrete is met.
The invention is realized by the following technical scheme:
the invention provides an underwater concrete containing high-titanium heavy slag, which comprises the following components in parts by mass: 250 to 370 portions of cement, 80 to 95 portions of fly ash, 50 to 60 portions of phosphorous slag powder, 970 to 1110 portions of high titanium heavy slag sand, 800 to 865 portions of high titanium heavy slag stone, 190 portions of water and 8.51 to 12.97 portions of admixture; the strength grade of the underwater concrete is C25-C40.
Further, the underwater concrete also comprises 24-35 parts of an expanding agent.
Further, the grain size range of the high-titanium heavy slag stone is 5-31.5mm continuous gradation, the maximum crushing index is 12-14%, the bulk density is 1350-1400kg/m < 3 >, the apparent density is 2650-2750kg/m < 3 >, the void ratio is 49-50%, and the saturated surface is dry.
Further, the high titanium heavy slag sand has a continuous gradation of 0.15-4.75mm in particle size, a fineness modulus of 2.4-2.6, a slag powder content of 12-16%, a bulk density of 1750-1800kg/m3, and an apparent density of 3300-3350kg/m3.
Further, the fly ash is class F II fly ash.
Further, the phosphorus slag powder is L70 grade phosphorus slag powder.
Further, the additive is a polycarboxylic acid high-efficiency retarding water reducer.
Further, the cement is ordinary portland cement 42.5R.
Further, the swelling agent is a UEA swelling agent.
By adopting the technical scheme, the invention has the following advantages:
1. on one hand, the invention makes use of a large amount of industrial solid wastes of high-titanium heavy slag sand, high-titanium heavy slag stone, fly ash and phosphorous slag powder, the weight ratio of the solid wastes reaches more than 80%, and the solid wastes and cement are effectively combined by adjusting the using amount of each component, so that the obtained concrete not only has high cohesive force, dispersion resistance and segregation resistance, but also has the characteristics of self-leveling and self-compacting under water to form high-quality and uniform concrete. On the other hand, on the premise of using more than 80% of industrial solid waste high-titanium heavy slag sandstone, fly ash and phosphorus slag powder, the concrete keeps better workability and mechanical property, and simultaneously meets the underwater pouring requirement of pile foundation concrete.
2. The invention meets the working performance of the underwater concrete and ensures that the slump, the cohesiveness, the fluidity and the water retention of the underwater concrete are good.
3. The invention largely utilizes industrial solid wastes of high titanium heavy slag sand, high titanium heavy slag stone, fly ash and phosphorous slag powder, reduces the exploitation and use of natural stone, improves the utilization rate of the solid wastes, reduces the production cost and protects environmental resources.
4. The underwater concrete adopts the high-titanium heavy slag sand and the high-titanium heavy slag stone as aggregates, and the high-titanium heavy slag sand stone has porous surface and large void ratio, generates large friction resistance and large water absorption rate, and influences the properties of slump, fluidity and the like of the underwater concrete. In order to solve the problems of great slump loss and poor fluidity of underwater concrete, the invention utilizes phosphorus slag powder and fly ash as composite admixture of high-titanium heavy slag sand and high-titanium heavy slag stone through a great deal of experimental research, and carries out blending and various performance tests on the raw materials of the high-titanium heavy slag sand, the admixture, cement, an additive and water consumption, thereby obtaining the underwater concrete with good workability and mechanical properties meeting the standard requirements, and realizing the utilization of more than 80 percent of solid waste resources.
5. The mixing proportion of the underwater concrete containing the high-titanium heavy slag has the following advantages: on the premise of using more than 80% of industrial solid waste high-titanium heavy slag sand stone, fly ash and phosphorus slag powder, the concrete still maintains better workability and mechanical property, and simultaneously meets the underwater pouring requirement of pile foundation concrete.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The high titanium heavy slag is a stone material with certain strength formed by naturally cooling or hot splashing molten slag generated in the process of smelting vanadium titano-magnetite, and contains 20-25% of TiO 2 And is called high titanium heavy slag. The high titanium heavy slag has the characteristics of porous surface, high strength, good chemical stability, no alkali activity and the like, is processed into aggregates with different grades, can be used as production materials of concrete and cement products through long-term experimental research and practical application, can replace natural gravels to prepare high titanium heavy slag aggregate concrete, utilizes solid waste resources, can save natural resources and reduce the concrete cost.
The fly ash is mainly power plant boiler fly ash, the fly ash obtained by deep processing powder collected from a flue of a thermal power plant has certain activity, and the fly ash can be used as an admixture of concrete to improve the workability of the concrete.
The phosphorus slag is an industrial byproduct in the process of preparing yellow phosphorus by an electric furnace method, and the main chemical components of the phosphorus slag are CaO and SiO 2 (about 80% or more) and a small amount of Al 2 O 3 、P 2 O 5 And CaF 2 The phosphorus slag powder processed by the components is used as the concrete admixture, the hydration heat of the concrete can be reduced, and the later strength of the concrete is greatly improved.
The invention provides an underwater concrete containing high-titanium heavy slag, which comprises the following components in parts by mass: 250 to 370 portions of cement, 80 to 95 portions of fly ash, 50 to 60 portions of phosphorous slag powder, 970 to 1110 portions of high titanium heavy slag sand, 800 to 865 portions of high titanium heavy slag stone, 190 portions of water and 8.51 to 12.97 portions of admixture; the strength grade of the underwater concrete is C25-C40.
Because of the construction particularity and the use functionality of the underwater concrete, the underwater concrete is different from other concrete, and the underwater concrete needs to have high cohesive force, dispersion resistance and segregation resistance, and has the characteristics of high quality and uniformity due to underwater self-leveling and self-compaction; in order to enable the underwater concrete to have the characteristics, the underwater concrete meeting the advantages is obtained by limiting the components and the content ratio of the components.
Meanwhile, on the premise that more than 80% of industrial solid waste high-titanium heavy slag sandstone, fly ash and phosphorus slag powder are used, the invention also keeps better workability and mechanical property of concrete and simultaneously meets the underwater pouring requirement of pile foundation concrete.
The invention uses more than 80% of industrial solid waste, can reduce the exploitation and use of natural stone, improve the utilization rate of the solid waste, reduce the production cost and protect the environmental resources.
Further, the underwater concrete also comprises 24-35 parts of an expanding agent. The expansion agent is added to the underwater concrete with the anti-seepage grade, so that the shrinkage cracking of the concrete can be prevented or reduced, the concrete is more densified, and the anti-cracking and anti-seepage capabilities of a concrete structure are improved.
Further, the particle size range of the high-titanium heavy slag stone is5-31.5mm continuous gradation, maximum crushing index of 12-14%, and bulk density of 1350-1400kg/m 3 The apparent density is 2650-2750kg/m 3 The porosity is 49-50%, and the noodle is saturated. Based on the method, the high-titanium heavy slag stone has larger crushing index and high strength; the high-titanium heavy slag stone aggregate has porous surface, high water absorption rate and dry saturated surface, and can reduce the slump loss of the high-titanium heavy slag concrete over time.
Furthermore, the high titanium heavy slag sand has a continuous grading with a particle size range of 0.15-4.75mm, a fineness modulus of 2.4-2.6, a slag powder content of 12-16% (slag powder refers to particles with a particle size of less than 75um in the high titanium heavy slag sand), a bulk density of 1750-1800kg/m < 3 >, and an apparent density of 3300-3350kg/m < 3 >. The high-titanium heavy slag sand adopts medium sand, has larger slag powder content, has stronger filling property in concrete, and improves the compactness and the workability of the concrete.
Further, the fly ash is F-class II-grade fly ash. The admixture used as the concrete can improve the workability of the concrete and lead the concrete to be uniform and dense, thereby improving the strength and durability of the concrete, reducing the segregation and bleeding of the concrete and reducing the hydration heat of the concrete.
Further, the phosphorus slag powder is L70 grade phosphorus slag powder. As a concrete admixture, the workability of the concrete is improved, and the strength of the concrete is improved; has certain retardation, and the concrete doped with the phosphorus slag powder has high later strength and large strength increase rate.
Further, the additive is a polycarboxylic acid high-efficiency retarding water reducer. The workability of concrete is improved, the mixing amount is low, the water reducing rate is high, the slump loss is low, and the hydration heat release of cement is delayed.
Further, the cement is ordinary portland cement 42.5R. The common cement has early strength, high early hardness, great hydration heat and less dryness, and is favorable for underwater concrete engineering.
Further, the swelling agent is a UEA swelling agent. The composite expanding agent can offset the shrinkage force formed in the concrete hardening process, reduce the drying shrinkage cracks and improve the cracking resistance and the impermeability of the concrete.
Under the condition that cement, fly ash, phosphorous slag powder, high-titanium heavy slag sand, high-titanium heavy slag stone, water, an additive and an expanding agent have different contents, the strength grades of the obtained underwater concrete are different, and the concrete comprises the following examples:
example 1:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 260 parts of cement, 90 parts of fly ash, 55 parts of phosphorous slag powder, 1100 parts of high-titanium heavy slag sand, 835 parts of high-titanium heavy slag stone, 190 parts of water and 8.51 parts of an additive. Underwater concrete with strength grade C25.
Example 2:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 295 parts of cement, 85 parts of fly ash, 55 parts of phosphorous slag powder, 1060 parts of high-titanium heavy slag sand, 845 parts of high-titanium heavy slag stone, 190 parts of water and 9.57 parts of an additive. Underwater concrete with strength grade of C30.
Example 3:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 330 parts of cement, 80 parts of fly ash, 55 parts of phosphorous slag powder, 1020 parts of high-titanium heavy slag sand, 855 parts of high-titanium heavy slag stone, 190 parts of water and 10.70 parts of an additive. The strength grade is C35 underwater concrete.
Example 4:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 370 parts of cement, 80 parts of fly ash, 50 parts of phosphorous slag powder, 975 parts of high-titanium heavy slag sand, 865 parts of high-titanium heavy slag stone, 190 parts of water and 12.00 parts of an additive. The strength grade is C40 underwater concrete.
Example 5:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 250 parts of cement, 95 parts of fly ash, 60 parts of phosphorous slag powder, 1110 parts of high-titanium heavy slag sand, 800 parts of high-titanium heavy slag stone, 190 parts of water, 9.02 parts of an additive and 24 parts of an expanding agent. The strength grade is C25P6 underwater concrete.
Example 6:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 285 parts of cement, 90 parts of fly ash, 60 parts of phosphorous slag powder, 1065 parts of high-titanium heavy slag sand, 815 parts of high-titanium heavy slag stone, 190 parts of water, 10.14 parts of an additive and 26 parts of an expanding agent. The strength grade is C30P6 underwater concrete.
Example 7:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 285 parts of cement, 95 parts of fly ash, 60 parts of phosphorous slag powder, 1055 parts of high-titanium heavy slag sand, 815 parts of high-titanium heavy slag stone, 190 parts of water, 10.36 parts of an additive and 31 parts of an expanding agent. The strength grade is C30P8 underwater concrete.
Example 8:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 320 parts of cement, 90 parts of fly ash, 55 parts of phosphorous slag powder, 1025 parts of high-titanium heavy slag sand, 825 parts of high-titanium heavy slag stone, 190 parts of water, 11.34 parts of an additive and 28 parts of an expanding agent. The strength grade is C35P6 underwater concrete.
Example 9:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 320 parts of cement, 90 parts of fly ash, 60 parts of phosphorous slag powder, 1015 parts of high-titanium heavy slag sand, 820 parts of high-titanium heavy slag stone, 190 parts of water, 11.57 parts of an additive and 33 parts of an expanding agent. The strength grade is C35P8 underwater concrete.
Example 10:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 360 parts of cement, 85 parts of fly ash, 55 parts of phosphorous slag powder, 980 parts of high-titanium heavy slag sand, 830 parts of high-titanium heavy slag stone, 190 parts of water, 12.72 parts of an additive and 30 parts of an expanding agent. The strength grade is C40P6 underwater concrete.
Example 11:
the underwater concrete containing the high-titanium heavy slag comprises the following components in parts by mass: 360 parts of cement, 90 parts of fly ash, 55 parts of phosphorous slag powder, 970 parts of high-titanium heavy slag sand, 830 parts of high-titanium heavy slag stone, 190 parts of water, 12.97 parts of an additive and 35 parts of an expanding agent. The strength grade is C40P8 underwater concrete.
The component proportion of the 11 groups of underwater concrete provided above can be seen in the following table:
TABLE 1 component proportion of high titanium heavy slag-containing underwater concrete
In the C25P6, C25 represents the strength grade of concrete, and P6 represents the impervious grade of concrete.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The underwater concrete containing the high-titanium heavy slag is characterized by comprising the following components in parts by mass: 250 to 370 portions of cement, 80 to 95 portions of fly ash, 50 to 60 portions of phosphorous slag powder, 970 to 1110 portions of high titanium heavy slag sand, 800 to 865 portions of high titanium heavy slag stone, 190 portions of water and 8.51 to 12.97 portions of admixture; the strength grade of the underwater concrete is C25-C40.
2. The underwater concrete containing high titanium heavy slag according to claim 1, further comprising 24 to 35 parts of an expansive agent.
3. The underwater concrete containing high titanium heavy slag according to claim 1, wherein the high titanium heavy slag stone has a continuous gradation of particle size ranging from 5 to 31.5mm, a maximum crush index of 12 to 14%, a bulk density of 1350 to 1400kg/m3, an apparent density of 2650 to 2750kg/m3, a void ratio of 49 to 50%, and a saturated surface dry state.
4. The underwater concrete containing high titanium heavy slag of claim 1, wherein the high titanium heavy slag sand has a continuous gradation in a particle size range of 0.15 to 4.75mm, a fineness modulus of 2.4 to 2.6, a slag powder content of 12 to 16%, a bulk density of 1750 to 1800kg/m3, and an apparent density of 3300 to 3350kg/m3.
5. The underwater concrete containing high titanium heavy slag according to claim 1, wherein the fly ash is class F class ii fly ash.
6. The underwater concrete containing high titanium heavy slag according to claim 1, wherein the phosphorous slag powder is grade L70 phosphorous slag powder.
7. The underwater concrete containing high titanium heavy slag according to claim 1, wherein the admixture is a polycarboxylic acid high efficiency retarding water reducing agent.
8. The underwater concrete containing high titanium heavy slag according to claim 1, wherein the cement is Portland cement 42.5R.
9. The underwater concrete containing high titanium heavy slag according to claim 2, wherein the expansive agent is a UEA concrete expansive agent.
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| CN107032692A (en) * | 2016-11-17 | 2017-08-11 | 攀钢集团工程技术有限公司 | A kind of high-titanium dry slag concrete of use flyash and phosphorus slag powder dual mixing technology |
| KR101912626B1 (en) * | 2018-03-26 | 2018-10-29 | 주식회사 부원지에프씨 | Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same |
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