CN111908871A - White fiber high-performance C50 pump concrete - Google Patents
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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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
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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
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/802—White cement
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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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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical Kinetics & Catalysis (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses white fiber high-performance C50 pump concrete which comprises the components of cement, fly ash, slag micro powder, silica fume, basalt fiber, quartz sand, broken stone, an additive, mixing water and a titanium pigment. The white fiber high-performance fair-faced concrete prepared by the invention has the following characteristics: the tensile strength and ductility are high; is white in appearance and does not change with time; the surface performance of the fair-faced concrete is realized; the bubbles are few, and the color is uniform; the concrete provided by the invention is used as a structural concrete base material, mainly plays roles in compression resistance, crack resistance, permeation resistance and attractiveness, and has a high application value in the field of building and bridge structural concrete.
Description
Technical Field
The invention belongs to the field of building and tower column structural materials, relates to high-strength, durable and anti-cracking as-cast finish concrete produced on a large scale, and particularly relates to white fiber high-performance C50 pump concrete suitable for long-span bridge cable tower engineering and other gradient concrete structural engineering.
Background
As a key component of a cable-stayed bridge, a concrete tower column is limited by the performance of the traditional concrete material and is influenced by a severe construction environment, so that pitted surfaces and cracks are easily generated on the surface of the concrete tower column, and the safety, applicability and durability of the concrete tower column in the service period are reduced. Meanwhile, the cable-stayed bridge is mostly used as a landscape mark building, the traditional grey concrete tower column is insufficient in attractiveness, the bridge is influenced to be coordinated with the natural and social environments, secondary protection and decoration are needed, a large amount of manpower, material resources and time cost are increased, and meanwhile, the later maintenance cost of the tower column is high. In view of this, the concrete tower column has comprehensive requirements on mechanical properties, durability and aesthetic property, and how to improve the technologies of crack prevention, durability protection and beautification of the concrete tower column becomes a technical problem to be solved urgently.
Disclosure of Invention
Based on the defects of mechanical property and aesthetic property of the traditional tower column made of fair-faced concrete, the invention provides white fiber high-performance C50 pump concrete which integrates decoration, high strength, fair water and constructability, so that the concrete can be used for concrete structure construction and has better working performance, mechanical property, durability, aesthetic property and construction performance.
The invention solves the technical problem and adopts the following technical scheme:
a white fiber high-performance C50 pump concrete, which is characterized in that the C50 pump concrete comprises the following components: 340-405 kg/m cement325-35 kg/m of fly ash350-89 kg/m of slag micro powder310 to 25kg/m of silica fume33.2-9.2 kg/m basalt fiber3736-786 kg/m of quartz sand31074-1151 kg/m of crushed stone34.5-5.5 kg/m of additive3147-154 kg/m of mixing water3And 3-6 kg/m of titanium dioxide pigment3。
Preferably, the C50 pump concrete comprises the following components: 342kg/m cement328kg/m of fly ash389kg/m of slag micro powder320kg/m of silica fume33.2kg/m of basalt fiber3Quartz sand 747kg/m31074kg/m of crushed stone3Additive of 4.7kg/m3150kg/m of mixing water3Titanium dioxide pigment 3kg/m3。
Preferably, the cement is P.W.52.5-grade white cement, the initial setting time of the cement is not less than 45min, the final setting time of the cement is not more than 600min, the whiteness value of the cement is not less than 87, the 3d mortar compressive strength is not less than 22.0MPa, the flexural strength is not less than 4.0MPa, the 28d mortar compressive strength is not less than 52.5MPa, and the flexural strength is not less than 7.0 MPa.
Preferably, the fly ash is grade I, the water content of the fly ash is less than or equal to 1.0%, and the sulfur trioxide content is less than or equal to 3.0%.
Preferably, the basalt fiber is a stranded basalt chopped fiber, the water content of the basalt fiber is less than or equal to 0.2%, the alkali resistance is greater than or equal to 70%, the tensile strength of a dipped yarn is greater than or equal to 2000Gpa, the tensile elastic modulus is greater than or equal to 85Gpa, and the elongation at break is greater than or equal to 2.5%.
Preferably, the admixture is a polycarboxylic acid high-performance water reducing agent, the water reducing rate of the admixture is not less than 25%, the slump loss resistant time to concrete is not less than 2 hours, and the bleeding rate in 3 hours is not more than 5%.
Preferably, the quartz sand is prepared by compounding three granularities of coarse-grain-size sand, medium-grain-size sand and fine-grain-size sand; the particle size range of the coarse-particle-size sand is 2.36-3.75 mm, the particle size range of the medium-particle-size sand is 0.6-1.18 mm, the particle size range of the fine-particle-size sand is 0.15-0.3, the content of the super-particle-size particles in the coarse-particle-size sand, the medium-particle-size sand and the fine-particle-size sand is not more than 5%, the coarse-particle-size sand, the medium-particle-size sand and the fine-particle-size sand are compounded until the fineness modulus is 2.6-2.9, and the porosity of the compounded sand is not more than 43%.
Preferably, the titanium pigment is rutile titanium pigment, and the whiteness is not lower than 98.
Preferably, the crushed stone is in continuous gradation with the particle diameter of 5-25mm, and the apparent density of the crushed stone is not less than 2650kg/m3The porosity is not more than 42%, wherein the needle sheet content is not more than 5%.
The manufacturing method of the white fiber high-performance C50 pump concrete comprises the following steps: sequentially adding broken stone, slag micro powder, fly ash, quartz sand, basalt fiber, silica fume, cement and titanium pigment into a concrete mixer, mixing until all components are uniformly mixed, adding mixing water and an additive, and continuously mixing uniformly to obtain a mixture; and finally, sequentially pouring, vibrating and maintaining to obtain the white fiber high-performance C50 pump concrete.
The C50 pump concrete 28d standard curing compressive strength obtained by the invention is more than 60Mpa, the tensile strength is more than 6.0Mpa, and the gas content is not more than 3%; the obtained C50 pump concrete has the expansion degree of 520 +/-40 mm and the slump of 200 +/-20 mm.
The white fiber high-performance fair-faced concrete prepared by the invention has the following characteristics: the tensile strength and ductility are high; is white in appearance and does not change with time; the surface performance of the fair-faced concrete is realized; less bubbles and uniform color. The concrete provided by the invention is used as a structural concrete base material, mainly plays roles in compression resistance, crack resistance, permeation resistance and attractiveness, and has a high application value in the field of building and bridge structural concrete.
Compared with the prior art, the invention has the beneficial effects that:
1. the white fiber high-performance C50 pump concrete has whiteness and working performance which are not possessed by the traditional fair-faced concrete, can be used in bridge towers and building structures with the pump height of 200 m or more, enriches the decoration effect of the traditional fair-faced concrete, and has beautiful, elegant and white decorative effect.
2. The concrete has higher mechanical strength, the 28d standard curing compressive strength of the concrete is more than 60Mpa, the tensile strength is more than 6.0Mpa, the concrete can be directly used for structural pouring of bridges and towers and buildings, secondary decoration is omitted, chiseling and repairing are not required, plastering is not required, the environment is protected, and resources are saved.
3. The concrete has good construction pumping performance, the concrete expansion can be controlled to be 480-560 mm, the slump can be controlled to be 180-220 mm, and the cross section of the structure of the tower column or the pier body can be rectangular, circular or scalene special-shaped cross section and various special-shaped complex structures.
4. The concrete of the invention comprises: the basalt fiber is added, so that the ductility and tensile strength of concrete can be effectively improved, and cracks caused by temperature, shrinkage and the like are avoided; the superfine powder silica fume is added, so that the impermeability of a concrete structure can be improved, and the durability is improved; the titanium dioxide and the white cement are used, so that the ornamental value of the concrete structure can be improved.
Detailed Description
The white fiber high performance C50 concrete of the present invention is further illustrated in detail with reference to the following specific examples. The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation procedures are given, but the scope of the invention is not limited to the following examples.
The quality specifications of the raw materials used in the following examples are as follows:
the cement used was a grade p.w.52.5 (low alkali) white cement, purchased from albert blue cement plant: water consumption for standard consistency: 28.8 percent; stability: qualified; initial setting: 142 min; final setting: 205 min; breaking strength: 3 d: 7.1MPa, 28 d: 8.9 MPa; compressive strength: 3 d: 44.3MPa, 28 d: 67.5 MPa; content of chloride ion: 0.02 percent; alkali content: 0.48 percent; fineness: 0.04 percent; sulfur trioxide: 2.18 percent; content of magnesium oxide: 2.06 percent; whiteness: 90.
the used fly ash is the I-grade fly ash of the Maanshan universal power plant: fineness: 9.3 percent; water demand ratio: 92 percent; loss on ignition: 2.3 percent; water content: 0.2 percent; sulfur trioxide: 1.36 percent; content of calcium oxide: 6.42 percent; alkali content: 0.43 percent; free calcium oxide: 0.54 percent; whiteness: 56.9.
the slag micro powder is S95 level mineral powder of a novel Maanshan Zhongtian building material company Limited, and the mineral powder has the following activity indexes: 7 d: 78%, 28 d: 96%, sulfur trioxide: 0.82%, loss on ignition: 1.77%, water content: 0.1%, fluidity ratio: 100%, specific surface area: 421m2Kg, density: 2.89g/cm2Whiteness: 68.
the used silica fume is 900D-grade silica fume of Shanghai Tianki silica powder material company Limited: water requirement: 123 percent; activity index (28 d): 95 percent; specific surface area: 22.6m2(ii)/g; water content (powder): 1.0 percent; SiO 22The content is as follows: 95.26 percent; 28d ratio of electric flux: 30 percent; total alkali amount: 0.57 percent; content of chloride ion: 0.02 percent; loss on ignition: 2.7 percent.
The basalt fiber is 17-12-501YF6 grade twisted basalt chopped fiber of Anhui Menggu fiber materials science and technology Limited company: water content: 0.076%; linear density: 202 tet; alkali resistance: 80.0 percent; and (3) the tensile strength of the gum dipping sand is as follows: 2160 MPa; tensile modulus of elasticity: 85.1 GPa; elongation at break: 2.58 percent.
The additive is a polycarboxylic acid high-performance water reducing agent (PCAI high-efficiency water reducing agent): the water content is 29 percent; the gas content is 2.9%; the bleeding rate is 12%; compressive strength ratio 7 d: 155%, 28 d: 147 percent; shrinkage ratio: 73 percent; content of chloride ion: 0.03; total alkali amount: 0.58.
the quartz sand is compounded by three granularities of coarse-grain-size sand, medium-grain-size sand and fine-grain-size sand; the particle size range of the coarse-particle-size sand is 2.36-3.75 mm, the particle size range of the medium-particle-size sand is 0.6-1.18 mm, the particle size range of the fine-particle-size sand is 0.15-0.3, the content of the super-particle-size particles in the coarse-particle-size sand, the medium-particle-size sand and the fine-particle-size sand is not more than 5%, the coarse-particle-size sand, the medium-particle-size sand and the fine-particle-size sand are compounded until the fineness modulus is 2.6-2.9, and the porosity of the compounded sand is not more than 43%.
The titanium dioxide pigment is ATR-312 rutile type titanium dioxide: content of titanium dioxide: 93.26 percent; achromatism force: 100 percent; 105 ℃ volatiles: 0.35; water soluble substance: 0.15 percent; pH of the aqueous suspension: 7.69; oil absorption g/100 g: 18; screen residue: 0.01; resistivity of water extract: 6024; the rutile crystal form content: 99.12 of the total weight of the powder; dispersibility: 6.5; the whiteness is not lower than 98.
The crushed stone is in continuous gradation with the particle size of 5-25mm, the apparent density of the crushed stone is not less than 2650kg/m3, the porosity is not more than 42 percent, and the needle sheet content is not more than 5 percent.
The mixing water is well water: the pH value is 6.99; insoluble matter 186 mg/L; soluble 206 mg/L; the content of chloride ions is 32.49 mg/L; sulfide 62.46 mg/L; the alkali content was 22.10 mg/L.
Example 1
The C50 pump concrete of this example comprises the following components: cement 405kg/m325kg/m of fly ash350kg/m of slag micro powder310kg/m of silica fume33.2kg/m of basalt fiber3736kg/m of quartz sand31151kg/m of crushed stone35.5kg/m of additive3147kg/m of mixing water3Titanium dioxide pigment 3kg/m3。
The performance parameters of the C50 pump concrete obtained in this example are shown in Table 1.
Example 2
The C50 pump concrete of this example comprises the following components: 386kg/m cement325kg/m of fly ash350kg/m of slag micro powder320kg/m of silica fume3Basalt fiber 4.6kg/m3786kg/m of quartz sand31131kg/m of crushed stone35.0kg/m of additive3150kg/m of mixing water3Titanium dioxide pigment 4kg/m3。
The performance parameters of the C50 pump concrete obtained in this example are shown in Table 1.
Example 3
The C50 pump concrete of this example comprises the following components: cement 347kg/m335kg/m of fly ash358kg/m of slag micro powder3Silica fume 25kg/m36.9kg/m basalt fiber3780kg/m of quartz sand31075kg/m of crushed stone3Additive of 4.5kg/m3154kg/m of mixing water36kg/m of titanium dioxide pigment3。
The performance parameters of the C50 pump concrete obtained in this example are shown in Table 1.
Example 4
The C50 pump concrete of this example comprises the following components: 342kg/m cement325kg/m of fly ash389kg/m of slag micro powder3Silica fume 25kg/m39.2kg/m basalt fiber3Quartz sand 747kg/m31074kg/m of crushed stone3Additive of 4.7kg/m3150kg/m of mixing water3Titanium dioxide pigment 9kg/m3。
The performance parameters of the C50 pump concrete obtained in this example are shown in Table 1.
Example 5
The C50 pump concrete of this example comprises the following components: cement 250kg/m325kg/m of fly ash3150kg/m of slag micro powder3Silica fume 25kg/m33.2kg/m of basalt fiber3Quartz sand 747kg/m31074kg/m of crushed stone3Additive of 4.3kg/m3150kg/m of mixing water36kg/m of titanium dioxide pigment3。
The performance parameters of the C50 pump concrete obtained in this example are shown in Table 1.
TABLE 1 Properties of the concretes obtained in the examples
Note: in table 1, a white fiber high-performance concrete specimen is cast for 24 hours, then is demoulded, is maintained for 28 days under standard conditions and then is tested, and the compression strength and the splitting tensile strength are tested according to the standard ' standard of testing methods for mechanical properties of ordinary concrete ' (GB/T50081-2002), and the chloride ion permeation resistance, the water permeability and the carbonization depth are tested according to the standard of testing methods for long-term performance and durability of ordinary concrete ' (GB/T50082-2009).
The test results of 200 groups show that the C50 pump concrete with good workability, high mechanical strength, good crack resistance and high durability is prepared by reasonably matching the raw materials. The white fiber high-performance concrete mainly plays roles in cracking resistance, attractiveness and structural layer concrete protection, and can improve the tensile strength, the anti-permeability performance and the attractiveness of the surface layer concrete of the tower column. The concrete of the invention is successfully applied to the entity engineering of the Yangtze bridge in the pool state, the appearance of the tower column is white and flat, the crack resistance and the durability of the tower column are embodied in practice, the service life of the tower column is prolonged, the comprehensive cost of a project is reduced, social resources are saved, good social and economic effects are achieved, and a certain technical reference is provided for the popularization and the use of the white fiber high-performance concrete in bridge tower columns and building structures in the future.
Claims (10)
1. A white fiber high-performance C50 pump concrete, which is characterized in that the C50 pump concrete comprises the following components: 340-405 kg/m cement325-35 kg/m of fly ash350-89 kg/m of slag micro powder310 to 25kg/m of silica fume3Basalt fiber reinforced cement3.2-9.2 kg/m rock fiber3736-786 kg/m of quartz sand31074-1151 kg/m of crushed stone34.5-5.5 kg/m of additive3147-154 kg/m of mixing water3And 3-9 kg/m of titanium dioxide pigment3。
2. The white fiber high performance C50 pump concrete according to claim 1, wherein the C50 pump concrete comprises the following components: cement 405kg/m325kg/m of fly ash350kg/m of slag micro powder310kg/m of silica fume33.2kg/m of basalt fiber3736kg/m of quartz sand31151kg/m of crushed stone35.5kg/m of additive3147kg/m of mixing water3Titanium dioxide pigment 3kg/m3。
3. The white fiber high performance C50 pump concrete according to claim 1 or 2, wherein: the cement is P.W.52.5-grade white cement, the initial setting time of the cement is not less than 45min, the final setting time of the cement is not more than 600min, the whiteness value of the cement is not less than 87, the compressive strength of 3d mortar is not less than 22.0MPa, the flexural strength is not less than 4.0MPa, the compressive strength of 28d mortar is not less than 52.5MPa, and the flexural strength is not less than 7.0 MPa.
4. The white fiber high performance C50 pump concrete according to claim 1 or 2, wherein: the coal ash is I-grade, the water content of the coal ash is less than or equal to 1.0%, and the sulfur trioxide content is less than or equal to 3.0%.
5. The white fiber high performance C50 pump concrete according to claim 1 or 2, wherein: the basalt fiber is a stranded basalt chopped fiber, the water content of the basalt fiber is less than or equal to 0.2%, the alkali resistance is more than or equal to 70%, the tensile strength of a dipped yarn is more than or equal to 2000Gpa, the tensile elastic modulus is more than or equal to 85Gpa, and the elongation at break is more than or equal to 2.5%.
6. The white fiber high performance C50 pump concrete according to claim 1 or 2, wherein: the additive is a polycarboxylic acid high-performance water reducing agent, the water reducing rate of the additive is not less than 25%, the slump loss resistant time to concrete is not less than 2 hours, and the bleeding rate in 3 hours is not more than 5%.
7. The white fiber high performance C50 pump concrete according to claim 1, wherein: the quartz sand is prepared by compounding three granularities of coarse-grain-size sand, medium-grain-size sand and fine-grain-size sand; the particle size range of the coarse-particle-size sand is 2.36-3.75 mm, the particle size range of the medium-particle-size sand is 0.6-1.18 mm, the particle size range of the fine-particle-size sand is 0.15-0.3, the content of the super-particle-size particles in the coarse-particle-size sand, the medium-particle-size sand and the fine-particle-size sand is not more than 5%, the coarse-particle-size sand, the medium-particle-size sand and the fine-particle-size sand are compounded until the fineness modulus is 2.6-2.9, and the porosity of the compounded sand is not more than 43%.
8. The white fiber high performance C50 pump concrete according to claim 1, wherein: the titanium pigment is rutile titanium pigment with whiteness not lower than 98.
9. The white fiber high performance C50 pump concrete according to claim 1, wherein: the crushed stone is in continuous gradation with the particle size of 5-25mm, and the apparent density of the crushed stone is not less than 2650kg/m3The porosity is not more than 42%, wherein the needle sheet content is not more than 5%.
10. The white fiber high performance C50 pump concrete according to claim 1, wherein: the standard curing compressive strength of the C50 pump concrete 28d is more than 60Mpa, the tensile strength is more than 6.0Mpa, and the gas content is not more than 3%; the expansion degree of the C50 pump concrete is 520 +/-40 mm, and the slump is 200 +/-20 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113045256A (en) * | 2021-04-23 | 2021-06-29 | 中建七局第四建筑有限公司 | Manufacturing process of clean water concrete |
| CN113060994A (en) * | 2021-04-12 | 2021-07-02 | 贵州省公路工程集团有限公司 | Basalt fiber concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060994A (en) * | 2021-04-12 | 2021-07-02 | 贵州省公路工程集团有限公司 | Basalt fiber concrete |
| CN113045256A (en) * | 2021-04-23 | 2021-06-29 | 中建七局第四建筑有限公司 | Manufacturing process of clean water concrete |
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