CN108996969B - White self-compacting clear water C40 pump concrete - Google Patents
White self-compacting clear water C40 pump concrete Download PDFInfo
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- CN108996969B CN108996969B CN201811044245.9A CN201811044245A CN108996969B CN 108996969 B CN108996969 B CN 108996969B CN 201811044245 A CN201811044245 A CN 201811044245A CN 108996969 B CN108996969 B CN 108996969B
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- 239000004567 concrete Substances 0.000 title claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 32
- 239000004575 stone Substances 0.000 claims abstract description 10
- 239000006004 Quartz sand Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 7
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims abstract description 6
- 239000001038 titanium pigment Substances 0.000 claims abstract description 6
- 239000004576 sand Substances 0.000 claims description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000004408 titanium dioxide Substances 0.000 claims description 7
- 238000006049 ring expansion reaction Methods 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000011362 coarse particle Substances 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 235000019580 granularity Nutrition 0.000 claims description 2
- 239000011376 self-consolidating concrete Substances 0.000 abstract description 13
- 238000005034 decoration Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 17
- 238000010276 construction Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses white self-compacting clear water C40 pump concrete which comprises the following components of cement 350-43050-80 parts of slag micro powder, 790-830 parts of quartz sand, 5-6 parts of an additive, 155-165 parts of mixing water, 5-8 parts of titanium pigment and 900-940 parts of andesite crushed stone, wherein the unit of each component is kg/m3. The white self-compacting clear water concrete prepared by the invention has high flowing and self-compacting performances of the conventional self-compacting concrete. Meanwhile, the coating has pure white appearance and does not change along with time. Meanwhile, the surface performance of the fair-faced concrete is realized. Less bubbles and uniform color. Has higher application value in the field of decorative concrete. The concrete can be used as a concrete base material for a structure. And (4) integrally forming. The decoration of concrete facing is avoided. The coating is saved, and the labor cost is reduced. Accords with the concept of green buildings in China.
Description
Technical Field
The invention belongs to the field of building materials, and relates to white, high-strength and self-compacting clear water concrete produced on a large scale, in particular to white self-compacting clear water C40 pump concrete.
Background
With the continuous development of economy, the requirements on environment protection and vision of buildings are increasingly improved, the dry concrete technology is rapidly developed to follow the trend, and the dry concrete technology becomes the first choice of large-scale public buildings with the advantages of safety, cleanness, attractiveness, easiness in cleaning and durability. However, the color of the traditional fair-faced concrete is single, and the primary color of the concrete is mainly used. Many architectural designs are beginning to place more demands on the finish of exterior walls. Although the traditional exterior wall decoration hanging plate has rich shapes, the natural color and simplicity of concrete cannot be brought, the construction and maintenance cost is higher, and the service life is shorter.
Meanwhile, the shape of modern public large buildings gradually tends to be complex, and more special-shaped components begin to appear on engineering projects. The concrete reinforcement gap is smaller, the traditional concrete construction performance can not meet the pouring requirement sometimes, and the concrete construction vibration can not be carried out in a part of narrow space.
Disclosure of Invention
The invention aims to overcome the defects in the traditional fair-faced concrete technology, and provides white self-compacting clear water C40 pump concrete which is high-performance concrete integrating decoration, high strength, clear water and constructability. Can be used for concrete structure construction, and has better mechanical property and construction performance.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the white self-compacting clear water C40 pump concrete comprises the following components of 350-430 parts of cement, 50-80 parts of slag micro powder, 790-830 parts of quartz sand, 5-6 parts of additive, 155-165 parts of mixing water, 5-8 parts of titanium pigment and 900-940 parts of andesite gravel, wherein the unit of each component is kg/m3。
The concrete comprises 350-400 parts of cement, 50-60 parts of slag micro powder, 790-800 parts of quartz sand, 5-6 parts of an additive, 155-160 parts of mixing water, 5-7 parts of titanium pigment and 900-920 parts of andesite crushed stone.
The concrete comprises the following components of cement 420, slag micro powder 60, quartz sand 820, an additive 5.3, mixing water 165, titanium pigment 6 and andesite crushed stone 930.
The cement is white P.W.42.5, the initial setting time of the cement is not less than 45min, the final setting time of the cement is less than 600min, the whiteness value of the cement is not less than 87, the 28d mortar compressive strength is more than 48MPa, the water consumption of the standard consistency of the cement is not more than 27%, the content of tricalcium aluminate mineral component in the cement is not more than 7.0%, and the specific surface area of the cement is not more than 380m2/kg。
The admixture is a polycarboxylic acid high-performance water reducing agent, the water reducing rate of the admixture is more than 25%, the slump loss prevention time of the admixture to concrete is more than or equal to 2 hours, and the admixture has certain viscosity reduction and thickening effects (the Marsh tube test is less than 10s when the admixture is mixed at 220 +/-20 mm according to the cement paste fluidity of JGJT 283 and 2012, namely, the homogeneity test method of the concrete admixture); the bleeding rate in 3 hours is not more than 5 percent, the total air bubble number and the air bubble form in the concrete need to be controlled, the total air content of the concrete needs to be controlled to be not more than 3 percent, and the air bubble form is uniform and dense. The maximum bubble diameter should be controlled below 2 mm.
The quartz sand is prepared by compounding three granularities, wherein the coarse grain diameter sand: 1.25 mm-0.63 mm; medium-particle-size sand: 0.63 mm-0.315 mm; fine grain size sand: 0.315-0.16 mm, wherein the content of ultra-grain-size grains in the coarse-grain-size sand, the medium-grain-size sand and the fine-grain-size sand is not more than 5%, the coarse-grain-size sand, the medium-grain-size sand and the fine-grain-size sand are compounded until the fineness modulus is 2.3-2.5, and the porosity of the compounded sand is not more than 43%.
The titanium dioxide pigment mainly comprises titanium dioxide, and the content of effective titanium dioxide is more than 90%. The whiteness value is not less than 98.
The andesite crushed stone is continuous grading andesite shaping crushed stone with the particle size of 5-20mm, and the apparent density of the andesite shaping crushed stone is not less than 2650kg/m3The porosity is not more than 42%, wherein the needle sheet content is less than 5%.
The 28d standard curing compressive strength of the concrete is more than 48MPa, the gas content is not more than 3%, and the overall whiteness of the concrete is not less than 90%.
The concrete expansion degree is 650 +/-50 mm, the time of T500 (when the slump expansion degree is measured by using a slump cone, the time from lifting of the slump cone to timing is started until the diameter of a slump expansion surface of a mixture reaches 500 mm) is within 5s, the difference between the expansion degree and J ring expansion degree (in a J ring expansion degree test, after the mixture stops flowing, the average value of the maximum diameter of the expansion surface and the diameter perpendicular to the maximum diameter) is within 25mm, the time of a V-shaped groove (a test method for testing the segregation resistance of self-compacting concrete by adopting the V-shaped funnel), the concrete mixture is filled into the V-shaped funnel, the time from opening of a bottom cover of a discharge port is counted, the time of the mixture flowing out of the discharge port completely is recorded) is 10-20s, the height difference of the U-shaped groove (a specified U-shaped box is adopted, the self-compacting concrete mixture is detected to pass through a steel bar gap, and self-filling to various parts in the box. ) Within 20mm, and two ends H of an L-shaped box (adopting an L-shaped box test, the ratio of the height of the concrete at the frontmost end to the height of the concrete at the endmost end)2/H1The height ratio is 0.8-1.0. Has better self-leveling and compact performance.
Compared with the prior art, the invention has the beneficial effects that:
1. the white fair-faced self-compacting concrete has whiteness which is not possessed by the traditional fair-faced concrete, and can be used for large-scale decorative members and decorative surfaces. Enriching the decorative effect of the traditional fair-faced concrete. Has the characteristics of beautiful appearance and elegant appearance. Its unique white decorative effect. Has the advantages of stable and simple concrete decorative surface. Has unique charm.
2. The white fair-faced self-compacting concrete has higher mechanical strength, and the 28d compressive strength is above C40 concrete. Can be directly used for the structural casting of buildings. The wall upright posts and the like in the building can be directly used for decoration, and chemical products such as paint, veneering and the like are omitted; is beneficial to environmental protection: the clean water concrete structure is formed in one step, chiseling and repairing are not required, plastering is not required, a large amount of construction waste is reduced, the environment is protected, and resources are saved.
3. The white clear water self-compacting concrete has better construction pumping performance, and the plastic viscosity of the concrete can be controlled below 40mPa ∙ s. Can face various special-shaped complex structures. The self-compaction and self-leveling can be realized for the area with small gap of the reinforcing bar and unable to be vibrated. Without adding additional labor costs. The self-compaction performance is excellent, the concrete expansion degree is 650 +/-50 mm, the T500 time is within 5s, the difference between the expansion degree and the J-ring expansion degree is within 25mm, the time of a V-shaped groove is 10-20s, the height difference of a U-shaped groove is within 20mm, and H-shaped grooves at two ends of an L-shaped box are H-shaped2/H1The height ratio is 0.8-1.0.
4. The self-compacting fair-faced concrete can well solve the problem. The construction performance of the self-leveling vibration-free concrete can greatly reduce the labor cost. Compared with the traditional fair-faced concrete, the surface quality of the fair-faced concrete is also greatly improved. Because the traditional fair-faced concrete needs to be vibrated, more air holes may exist on the surface which is not vibrated in place in the construction process, the diameter of the air bubbles is larger, more admixture of the traditional concrete exists, and color difference may occur locally. The problem can be better solved by the clear water self-compacting concrete.
5. The white clear water self-compacting concrete provided by the invention integrates white, clear water and self-compacting performances. Has the excellent construction performance of the self-compacting concrete and the white decorative effect. And embodies the simple, luxurious, natural and stable appearance lingering charm of the concrete to a certain extent. Meanwhile, the series of concrete has a higher concrete strength standard, and the 28d strength is higher than 48 MPa. Can be used for one-time pouring and tamping of the whole structure. The stability of the building structure is greatly improved. The project construction cost can be reduced to a certain extent. Greatly improving the utilization efficiency of resources.
Detailed Description
The C40 white clear water self-compacting concrete of the present invention will be further described in detail with reference to the following specific examples to provide a more thorough understanding of the present invention, but should not be construed as limiting the scope of the present invention.
The white self-compacting clear water C40 pump concrete comprises the following components, by weight, 350-430 parts of cement, 50-80 parts of slag micro powder, 790-830 parts of quartz sand, 5-6 parts of additives, 155-165 parts of mixing water, 5-8 parts of titanium pigment and 900-940 parts of andesite gravel, wherein the unit of each component is kg/m3。
Preferably, the cement of the embodiment is white P.W.42.5, the initial setting time of the cement is not less than 45min, the final setting time of the cement is less than 600min, the whiteness value of the cement is not less than 87, the 28d mortar compressive strength is greater than 48MPa, the water consumption of the standard consistency of the cement (the water consumption of the standard consistency of the cement refers to the ratio of the water consumption to the mass of the cement when the cement is completely slurried with the standard consistency) is not more than 27%, the content of the tricalcium aluminate mineral component in the cement is not more than 7.0%, and the specific surface area of the cement is not more than 380m2/kg。
Preferably, the admixture of the embodiment is a polycarboxylic acid high-performance water reducing agent, the water reducing rate of the admixture is more than 25%, the slump loss resistant time of the admixture to concrete is not less than 2 hours, and the bleeding rate of the admixture in 3 hours is not more than 5%.
As a further preferred example, the quartz sand of the present embodiment is compounded by three kinds of particle sizes, coarse particle size sand: 1.25 mm-0.63 mm; medium-particle-size sand: 0.63 mm-0.315 mm; fine grain size sand: 0.315-0.16 mm, wherein the content of ultra-grain-size grains in the coarse-grain-size sand, the medium-grain-size sand and the fine-grain-size sand is not more than 5%, the coarse-grain-size sand, the medium-grain-size sand and the fine-grain-size sand are compounded until the fineness modulus is 2.3-2.5, and the porosity of the compounded sand is not more than 43%.
Preferably, the whiteness of the titanium dioxide pigment is not less than 98, and the purity of the titanium dioxide pigment is more than 90%.
More preferably, the crushed andesite of the present embodiment is a crushed andesite plastic with a continuous gradation of 5 to 20mm in particle size, and has an apparent density of 2650kg/m or more3The porosity is not more than 42%, wherein the needle sheet content is less than 5%.
More preferably, the standard curing compressive strength of the concrete 28d of the embodiment is more than 48MPa, the gas content is not more than 3%, and the overall whiteness of the concrete is not less than 90.
In the embodiment, the concrete expansion degree is 650 +/-50 mm, the T500 (when the slump expansion degree is measured by using a slump cone, the time from the lifting of the slump cone to the time when the diameter of a slump expansion surface of a mixture reaches 500 mm) is within 5s, the time difference between the expansion degree and the J ring expansion degree (in a J ring expansion degree test, after the mixture stops flowing, the average value of the maximum diameter of the expansion surface and the diameter perpendicular to the maximum diameter) is within 25mm, the V-shaped groove time (a test method for testing the segregation resistance of self-compacting concrete by adopting a V-shaped funnel), the concrete mixture is filled into the V-shaped funnel, the time from the opening of a discharge port bottom cover is counted, the time of the mixture flowing out of a discharge port completely is recorded) is 10-20s, the height difference of the U-shaped groove (a specified U-shaped box is adopted, the self-compacting concrete mixture is detected to pass through a steel bar gap, and self-filling to various parts in the box. ) Within 20mm, and two ends H of an L-shaped box (adopting an L-shaped box test, the ratio of the height of the concrete at the frontmost end to the height of the concrete at the endmost end)2/H1The height ratio is 0.8-1.0.
Table 1 shows three specific examples of the composition and application of a C40 white fair-faced self-compacting concrete. Meanwhile, the water-cement ratio is floated by 0.02 up and down, three groups of test mixture ratios are correspondingly generated, and the specific compositions and applications of the three groups of test mixture ratios are shown as follows. In this example, the single component ratio (kg/m) of each component is3) The following were used:
TABLE 1 white self-compacting clear water C40 Pump concrete
Note: the data units in Table 1 are all kg/m3。
Corresponding data of the sample concrete after trial mixing of the concrete mix proportions in the three examples are shown in table 2:
TABLE 2 trial results
Under the condition of the 3 groups of mixture ratios, the preferable mixture ratio 1 is used for mass production and pouring a concrete wall surface, the required performance index test of the concrete is carried out in the formal production process,
example 1 is the most preferred solution, the overall performance effect is the best, and the hardened concrete surface has no air bubbles larger than 2 mm. No obvious crack and powdering trace. Has better decorative effect.
A large number of tests show that the white fair-faced concrete with high mechanical strength, good self-compacting construction performance and certain novel facing effect is prepared by reasonably matching the raw materials. The application range of the traditional fair-faced concrete is enlarged. Enriches the appearance form of the finish surface of the fair-faced concrete. And resources are saved from a certain angle. So that the decorative layer has higher durability. The service life of the device is prolonged. The comprehensive cost of the project is reduced. Saves social resources and has good social and economic effects. Provides a certain technical reference for the popularization and the use of the fair-faced concrete in the future.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (2)
1. The white self-compacting clear water C40 pump concrete is characterized by comprising 350-400 parts of cement, 50-60 parts of slag micro powder, 790-800 parts of quartz sand, 5-6 parts of an additive, 155-160 parts of mixing water, 5-7 parts of titanium pigment and 900-920 parts of andesite crushed stone, wherein the units of all the components are kg/m3，
The cement is white P.W.42.5, the initial setting time of the cement is not less than 45min, the final setting time of the cement is less than 600min, the whiteness value of the cement is not less than 87, the 28d mortar compressive strength is more than 48MPa, the water consumption of the standard consistency of the cement is not more than 27%, the content of tricalcium aluminate mineral component in the cement is not more than 7.0%, and the specific surface area of the cement is not more than 380m2The additive is a polycarboxylic acid high-performance water reducing agent, the water reducing rate is more than 25%, the slump retaining time for concrete is not less than 2 hours, the bleeding rate in 3 hours is not more than 5%, the quartz sand is prepared by compounding three granularities, and the sand with a coarse particle size is as follows: 1.25 mm-0.63 mm; medium-particle-size sand: 0.63 mm-0.315 mm; fine grain size sand: 0.315-0.16 mm, wherein the content of ultra-grain-size grains in the coarse-grain-size sand, the medium-grain-size sand and the fine-grain-size sand is not more than 5%, the coarse-grain-size sand, the medium-grain-size sand and the fine-grain-size sand are compounded until the fineness modulus is 2.3-2.5, and the porosity of the compounded sand is not more than 43%;
the whiteness of the titanium dioxide pigment is not less than 98, the purity of the titanium dioxide pigment is more than 90%, the andesite crushed stone is continuous graded andesite shaped crushed stone with the particle size of 5-20mm, and the apparent density of the andesite shaped crushed stone is not less than 2650kg/m3The porosity is not more than 42%, wherein the content of needle sheets is less than 5%, the concrete expansion degree is 650 +/-50 mm, the T500 time is within 5s, the difference between the expansion degree and the J ring expansion degree is within 25mm, the time of a V-shaped groove is 10-20s, the height difference of a U-shaped groove is within 20mm, and H-shaped grooves at two ends of an L-shaped box are arranged in the height direction of the U-shaped groove2/H1The height ratio is 0.8-1.0.
2. The white self-compacting clear water C40 pump concrete according to claim 1, wherein the concrete 28d standard curing compressive strength is greater than 48MPa, the air content is not greater than 3%, and the overall whiteness of the concrete is not less than 90%.
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| CN110981342B (en) * | 2019-12-17 | 2022-03-08 | 广西四维材料科技股份有限公司 | High-strength white concrete |
| CN113800827A (en) * | 2020-06-17 | 2021-12-17 | 海南兆诚混凝土有限公司 | Pigment C40 ordinary concrete and preparation method thereof |
| CN111908871A (en) * | 2020-08-13 | 2020-11-10 | 合肥工业大学 | White fiber high-performance C50 pump concrete |
| CN113788654A (en) * | 2021-09-10 | 2021-12-14 | 同济大学 | Self-compacting fair-faced concrete based on volcanic limestone powder and preparation method thereof |
| CN113773022A (en) * | 2021-09-27 | 2021-12-10 | 明阳智慧能源集团股份公司 | White clear water finish concrete for prefabricated parts and preparation method thereof |
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| CN101955342A (en) * | 2010-10-19 | 2011-01-26 | 浙江省建工集团有限责任公司 | Formula for preparing white faced as-cast finish concrete composition |
| CN102643063A (en) * | 2012-04-06 | 2012-08-22 | 浙江省建工集团有限责任公司 | Slag powder-doped composition for preparing white facing as-cast finish concrete |
| CN105036625A (en) * | 2015-07-13 | 2015-11-11 | 王培培 | High-performance bare concrete and application thereof |
| CN105272020A (en) * | 2015-11-20 | 2016-01-27 | 上海建工材料工程有限公司 | C40 pump concrete with heat resisting temperature of 500 DEG C |
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| CN108996969A (en) | 2018-12-14 |
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