CN105884301A - Vibrating-free, high-strength and self-compacting concrete capable of being pumped for super-large height larger than 620 meters and preparation method of concrete - Google Patents
Vibrating-free, high-strength and self-compacting concrete capable of being pumped for super-large height larger than 620 meters and preparation method of concrete Download PDFInfo
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- CN105884301A CN105884301A CN201610230165.7A CN201610230165A CN105884301A CN 105884301 A CN105884301 A CN 105884301A CN 201610230165 A CN201610230165 A CN 201610230165A CN 105884301 A CN105884301 A CN 105884301A
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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
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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
Abstract
The invention provides vibrating-free, high-strength and self-compacting concrete capable of being pumped for a super-large height larger than 620 meters and a preparation method of the concrete. The concrete is prepared from components of raw materials in percentage by mass as follows: 14%-15% of cement, 3.5%-4.5% of mineral powder, 2.5%-3.5% of ceramic polishing powder, 1%-2% of superfine fly ash, 70% of aggregate, 0.4%-0.6% of a polycarboxylic acid additive and 6.4%-6.6% of mixing water, wherein the aggregate comprises sand and stones, and the sand ratio ranges from 44% to 50%; sand comprises medium sand and fine sand, the stones comprise large stones and small stones, the fineness modulus of the medium sand is 2.4-2.6, and the fineness modulus of the fine sand is 1.9-2.1; the diameter of each large stone is 10-20 mm, and the diameter of each small stone is 5-10 mm. The high-strength concrete can be prepared with a conventional method. The extended degree of the high-strength and self-compacting concrete discharged out of a machine is higher than or equal to 700 mm, T500 is lower than or equal to 4 s, PA is lower than or equal to 20 mm, and SR is lower than or equal to 15%; the concrete is soft and loose and has medium viscosity and excellent self-compaction performance; the loss of the work performance of the concrete pumped for a 621-meter super-large height is as follows: the extended degree is lower than or equal to 10 mm, T50 is lower than or equal to 1 s, PA is lower than or equal to 10 mm, and SR is lower than or equal to 5%; the self-compaction performance at a pumping outlet is realized, and construction of concrete with a complicated structure can be realized without vibration.
Description
Technical field
The invention belongs to engineered building materials technical field, a kind of can 620 meters of super high pump-conveyings exempt from shake high-strength
Self-compacting concrete and preparation method thereof.
Background technology
The product combined as industrialization and urbanization, skyscraper originates from the U.S., various places the most all over the world.
Skyscraper is generally considered the ultimate symbol of urban development and urban economy strength, promote land use intensively,
Form city concentration effect, promote the sides such as city terrestrial reference is vivid, extend space in length and breadth, city, promote spatial landscape interactive
Face all has significant positive effect.Meanwhile, since entering the new century, the height of the first in the world high building constantly refreshes,
The average height of world's high-rise building constantly increases, and according to statistics, 2000, world's high-rise building average height was
375 meters, reaching 439 meters when 2010, and estimate to the year two thousand twenty, high-rise building flat height in the world's is up to 598
Rice.Different from ordinary skill, high-rise building is high due to structure, and concrete once occurs plugging or quality problems by right
High-rise building quality, completion time of project etc. cause obstruction, bring the economic loss huger than ordinary skill simultaneously.
Super-high building structure (Core Walls Structure shear wall, steel pipe column etc.) is generally of that reinforcing bar is intensive, steel plate staggered, empty
Between the characteristics such as narrow and small and structure is intensive, vibrating spear fully cannot vibrate through small gap, needs concrete ultra-high pumping
Rear outlet self-compacting ability, meets the concrete of outlet self-compaction after therefore developing service behaviour excellence, super high pump-conveying
For ensureing that construction quality has important function.
The ceramic industry of China was developed rapidly in recent years, however as the increase of ceramic yield, at pottery
Produce the fertilizer produced in preparation process also to get more and more.Pottery preparation process typically requires and is ground adobe throwing
Light thus remove the superficial layer of its surface 0.5-0.7mm, the most even need the superficial layer removing 1-2mm with satisfied use
Requirement.According to statistics, 1m is often produced2Polished bricks can produce about 1.5kg brick bits, stage property and the mill of grinding tool simultaneously
Damage and also will produce the chip of about 0.6kg, it is estimated that the ceramic polished brick of annual the most millions of tons of China is useless
Material produces.Due to imperfection and the restriction of technical merit of industrial chain, many waste materials can only pass through sides such as simply burying
Formula processes, and the most large-scale pottery mountain is the most far-reaching on the impact of environment, so how to Ceramic Tiles waste material
Carrying out recycling, carrying out recycling treatment turns waste into wealth for urgent problem instantly, its to energy conservation,
Environmental protection is extremely important.
Flyash is to receive the flue gas after coal combustion to catch the red ash got off, and is that the primary solids that thermal power plant is discharged gives up
Gurry, the flying dust captured by deduster, after discharging with wet row's form, the harmful components in flying dust will be made to dissolve in water,
Final polluted surface water and underground water.The chemical composition of flyash is similar to clay, wherein SiO2With Al2O3Total amount reaches
To about 70～90% (mass percent), can apply in concrete.And superfined flyash is to use electricity to gather dust air-flow
The relatively fine particle that sorting process is collected, it is generally of, and hydration activity is high, physics diminishing effect is notable, the filling of high-quality
The characteristics such as effect, are conducive to it to be applied in concrete production as admixture.
China's Super High concrete improves concrete pump by the fluidity of raising concrete, reduction viscosity mostly at present
Send performance, to obtain higher pumping height.But this mode is after concrete pumping height is more than 400 meters, very
Easily cause concrete that isolation, bleeding, slurry osteodiastasis phenomenon occur along with the increase of pumping pressure, cause aggregate to be piled up
There is plugging, thus cause huge economic loss.
Summary of the invention
For solve prior art exist problem, the present invention propose a kind of can 620 meters of super high pump-conveyings exempt from shake high-strength
Self-compacting concrete and preparation method thereof, this concrete have with low cost, pump-conveying property good, goes out the property of pump self-compaction
Can feature, the method has protection environment, economizes the land resource and the advantage such as energy-saving and emission-reduction simultaneously.
The technical scheme is that
Described a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, it is characterised in that: described coagulation
Soil raw material components and mass fraction proportioning be: 14%-15% cement, 3.5%-4.5% breeze, 2.5%-3.5% pottery throw
Light micro mist, 1%-2% superfined flyash, 70% aggregate, 0.4%-0.6% polycarboxylic admixture, 6.4%-6.6% mixing water；
Described aggregate is made up of sand and stone, and sand coarse aggregate ratio scope is 44%-50%；Described sand is made up of medium sand and fine sand, described stone
Son is made up of great Shi and gravelstone；Described medium sand modulus of fineness is 2.4-2.6, and described fine sand modulus of fineness is 1.9-2.1；Institute
Stating great Shi particle diameter is 10-20mm, and described gravelstone particle diameter is 5-10mm.
Further preferred version, described a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its
It is characterised by: medium sand is 7:3～5:5 with the mass ratio of fine sand.
Further preferred version, described a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its
It is characterised by: great Shi is 7:3～9:1 with the mass ratio of gravelstone.
Further preferred version, described a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its
It is characterised by: described polycarboxylic admixture is adjusted component and gas by collapse component, diminishing component, slow setting component, viscosity of guarantor
Bubble adjusts component and constitutes, and water-reducing rate is 20-25%, and solid content is 15-20%；Polycarboxylic admixture is protected component of collapsing
Mass fraction is 10%-40%, and the mass fraction of slow setting component is 5%-20%.
Further preferred version, described a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its
It is characterised by: ceramic polished powder size range is 1-10 μm, specific surface area >=800m2/kg。
Further preferred version, described a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its
Being characterised by: superfined flyash particle size distribution range is 1～5 μm, particle shape is spherical structure, specific surface area >=600m2/kg。
A kind of can the preparation method of High-strength self-compaction concrete of exempting to shake of 620 meters of super high pump-conveyings, it is characterised in that: bag
Include following steps:
Step 1: weigh raw material according to the raw material components of following concrete and mass fraction proportioning: 14%-15% cement,
3.5%-4.5% breeze, the ceramic polished micro mist of 2.5%-3.5%, 1%-2% superfined flyash, 70% aggregate, 0.4%-0.6%
Polycarboxylic admixture, 6.4%-6.6% mixing water；Described aggregate is made up of sand and stone, and sand coarse aggregate ratio scope is 44%-50%；
Described sand is made up of medium sand and fine sand, and described stone is made up of great Shi and gravelstone；Described medium sand modulus of fineness is 2.4-2.6,
Described fine sand modulus of fineness is 1.9-2.1；Described great Shi particle diameter is 10-20mm, and described gravelstone particle diameter is 5-10mm；
Step 2: the mixing water of great Shi, gravelstone, ceramic polished micro mist and 60%～80% is mixed in stirring container and stirs
Mix 60～90s；Again remaining raw material is poured in stirring container and stir 240～300s, obtain concrete.
Beneficial effect
The invention has the beneficial effects as follows:
A super high pump-conveying that () uses the inventive method to prepare exempts from High-strength self-compaction concrete of shaking, and it utilizes pottery to throw in a large number
Light micro mist, superfined flyash, have protection environment, economize the land resource and the advantage such as energy-saving and emission-reduction.
B () present invention utilizes ceramic polished micro mist replacement tradition silica flour to prepare super high pump-conveying High-strength self-compaction concrete, tool
There are economic advantages with low cost；Utilize ceramic polished micro mist and superfined flyash structure adjusting concrete viscosity, prevent
Viscosity is too high or too low.
C () unique stirring technique (utilizes stone, ceramic polished micro mist and the independent mix and blend of water, utilizes stone corner angle
Friction is clashed into ceramic polished micro mist) ceramic polished micro mist dispersiveness can be improved, uniformly it is filled in concrete, ensures
Concrete performance is stable.
D () present invention utilizes aggregate to unify continuous grading to optimize super high pump-conveying High-strength self-compaction concrete aggregate of exempting to shake and divide
Cloth, forms minimum porosity, and aggregate porosity ranges is 30%～38%, saves Binder Materials, improve pump-conveying property.
E super high pump-conveying that () uses the present invention to prepare exempts from High-strength self-compaction concrete of shaking, and pump-conveying property is excellent, through implementing
In example, after 621 meters of super high pump-conveyings, performance loss is little, divergence≤10mm, T500≤ 1s, PA≤10mm, SR≤5%, go out
Mouth concrete reaches can reach self-compaction, and high throwing pours lower concrete and do not disperses, and good fluidity can realize without vibration and cut
Power wall complexity concreting, construction quality is protected.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the embodiment of description is exemplary, it is intended to be used for explaining the present invention,
And be not considered as limiting the invention.
Following example are successful Application in Tianjin Gao Yin 117 mansion concrete construction, and 117 mansion steel plate shear force walls mix
Solidifying soil construction has the following characteristics that (1) shear wall structure is complicated, and internal steel slab muscle interlocks, and reinforcing bar is densely distributed,
Vibrating spear cannot fully vibrate；(2) pour drop big, more than more than 10 meters, for concrete require higher viscosity and
Anti-isolation ability；(3) tumbling barrel fixing point pours, and concrete flow distance is long, needs the good reinforcing bar property passed through.General
The most easily there is the phenomenon such as leakiness, honeycomb hole in logical concrete.By present invention, Tianjin 117
Concrete not only pouring quality in mansion is excellent, is successfully completed shear wall Core Walls Structure and binds, and it is disposable to create concrete
Pump Guiness World Records of 621 meters.
Embodiment 1:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14%, breeze 3.5%, ceramic polished micro mist 3.5%, superfined flyash 2%, aggregate
70%, polycarboxylic admixture 0.5%, mixing water 6.5%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 44%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 7:3, big gravelstone matter
Amount ratio is 7:3.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 820m2/ kg, 28d activity 93.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 93%,
28d activity 105, specific surface area 630m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.4, clay content 0.8%, fine sand modulus of fineness is 2.1, clay content 1.8%.Sand porosity is 42%.
In the present embodiment, coarse aggregate used is green stone, crush index 9%, clay content 0.9%.Use great Shi and gravelstone 2
Level particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity
It is 43%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 24%, and solid content is 19%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 10%, slow setting component is 20%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 80%
Stir；Remaining raw material is poured into stirring 240s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 2:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14.5%, breeze 4%, ceramic polished micro mist 3%, superfined flyash 1.5%, aggregate
70%, polycarboxylic admixture 0.5%, mixing water 6.5%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 44%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 7:3, big gravelstone matter
Amount ratio is 7:3.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 810m2/ kg, 28d activity 99.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 92%,
28d activity 100, specific surface area 600m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.5, clay content 0.9%, fine sand modulus of fineness is 2.0, clay content 2.0%.Sand porosity is 42%.
In the present embodiment, coarse aggregate used is green stone, crush index 8%, clay content 1%.Use great Shi and gravelstone 2 grades
Particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity is
43%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 20%, and solid content is 15%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 25%, slow setting component is 13%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 80%
Stir；Remaining raw material is poured into stirring 240s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 3:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 15%, breeze 4.5%, ceramic polished micro mist 2.5%, superfined flyash 1%, aggregate
70%, polycarboxylic admixture 0.5%, mixing water 6.5%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 44%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 7:3, big gravelstone matter
Amount ratio is 7:3.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 800m2/ kg, 28d activity 95.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 90%,
28d activity 105, specific surface area 610m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.6, clay content 1.0%, fine sand modulus of fineness is 1.9, clay content 1.9%.Sand porosity is 42%.
In the present embodiment, coarse aggregate used is green stone, crush index 10%, clay content 1%.Use great Shi and gravelstone 2
Level particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity
It is 43%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 25%, and solid content is 20%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 40%, slow setting component is 5%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 80%
Stir；Remaining raw material is poured into stirring 240s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 4:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14.5%, breeze 4%, ceramic polished micro mist 3%, superfined flyash 1.5%, aggregate
70%, polycarboxylic admixture 0.5%, mixing water 6.5%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 47%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 7:3, big gravelstone matter
Amount ratio is 7:3.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 810m2/ kg, 28d activity 100.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 95%,
28d activity 103, specific surface area 630m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.4, clay content 0.7%, fine sand modulus of fineness is 2.0, clay content 1.8%.Sand porosity is 42%.
In the present embodiment, coarse aggregate used is green stone, crush index 8%, clay content 0.7%.Use great Shi and gravelstone 2
Level particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity
It is 43%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 24%, and solid content is 19%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 25%, slow setting component is 13%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 80%
Stir；Remaining raw material is poured into stirring 240s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 5:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14.5%, breeze 4%, ceramic polished micro mist 3%, superfined flyash 1.5%, aggregate
70%, polycarboxylic admixture 0.5%, mixing water 6.5%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 50%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 7:3, big gravelstone matter
Amount ratio is 7:3.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 840m2/ kg, 28d activity 98.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 94%,
28d activity 102, specific surface area 640m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.6, clay content 0.8%, fine sand modulus of fineness is 2.0, clay content 1.6%.Sand porosity is 42%.
In the present embodiment, coarse aggregate used is green stone, crush index 10%, clay content 0.9%.Use great Shi and gravelstone 2
Level particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity
It is 43%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 22%, and solid content is 18%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 25%, slow setting component is 13%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 80%
Stir；Remaining raw material is poured into stirring 240s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 6:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14.5%, breeze 4%, ceramic polished micro mist 3%, superfined flyash 1.5%, aggregate
70%, polycarboxylic admixture 0.5%, mixing water 6.5%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 47%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 6:4, big gravelstone matter
Amount ratio is 8:2.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 830m2/ kg, 28d activity 97.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 90%,
28d activity 102, specific surface area 630m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.4, clay content 0.9%, fine sand modulus of fineness is 2.1, clay content 1.8%.Sand porosity is 38%.
In the present embodiment, coarse aggregate used is green stone, crush index 7%, clay content 1%.Use great Shi and gravelstone 2 grades
Particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity is
40%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 22%, and solid content is 18%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 25%, slow setting component is 13%.
By mixing water mix and blend 75s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 80%
Stir；Remaining raw material is poured into stirring 270s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 7:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14.5%, breeze 4%, ceramic polished micro mist 3%, superfined flyash 1.5%, aggregate
70%, polycarboxylic admixture 0.4%, mixing water 6.6%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 47%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 5:5, big gravelstone matter
Amount ratio is 9:1.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 820m2/ kg, 28d activity 95.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 93%,
28d activity 105, specific surface area 640m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.5, clay content 0.9%, fine sand modulus of fineness is 2.0, clay content 1.9%.Sand porosity is 44%.
In the present embodiment, coarse aggregate used is green stone, crush index 9%, clay content 0.6%.Use great Shi and gravelstone 2
Level particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity
It is 46%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 25%, and solid content is 19%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 25%, slow setting component is 13%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 70%
Stir；Remaining raw material is poured into stirring 300s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Embodiment 8:
In the present embodiment, preparation can the shake raw material of High-strength self-compaction concrete of exempting from of 620 meters of super high pump-conveyings be: cement,
Breeze, ceramic polished micro mist, superfined flyash, aggregate, polycarboxylic admixture, mixing water.The matter of feed components
Amount mark proportioning is: cement 14.5%, breeze 4%, ceramic polished micro mist 3%, superfined flyash 1.5%, aggregate
70%, polycarboxylic admixture 0.6%, mixing water 6.4%.Described aggregate is made up of sand and stone, sand coarse aggregate ratio 47%；Institute
Stating sand to be made up of medium sand and fine sand, described stone is made up of great Shi and gravelstone；Medium-fine sand mass ratio is 5:5, big gravelstone matter
Amount ratio is 9:1.
The cement used in the present embodiment is P O42.5 Portland cement, and breeze used is S95 breeze.Utilize
Ceramic polished micro mist replaces expensive silicon ash preparation High-strength self-compaction concrete, and ceramic polished micro mist is ceramic polished
Rear waste material grinding forms, and its particle size range concentrates between 1-10 μm, specific surface area 830m2/ kg, 28d activity 96.
Superfined flyash particle size distribution range concentrates in 1～5 μ m, and particle shape is spherical structure, and water demand ratio is 94%,
28d activity 101, specific surface area 610m2/kg.The present invention utilizes ceramic polished micro mist and superfined flyash to adjust coagulation
The viscosity of soil and service behaviour, ceramic polished micro mist has the effect increasing concrete viscosity, and superfined flyash has fall
The effect of low concrete viscosity.
In the present embodiment, fine aggregate used is river sand, uses medium sand and fine sand compound use, and wherein medium sand modulus of fineness is
2.6, clay content 0.5%, fine sand modulus of fineness is 2.1, clay content 2.0%.Sand porosity is 44%.
In the present embodiment, coarse aggregate used is green stone, crush index 10%, clay content 0.6%.Use great Shi and gravelstone 2
Level particle diameter stone compound use, wherein great Shi particle diameter is 10-20mm, and gravelstone particle diameter is 5-10mm.Stone porosity
It is 46%.
Polycarboxylic admixture is adjusted component and bubble adjusted component by collapse component, diminishing component, slow setting component, viscosity of guarantor
Constituting, its water-reducing rate is 23%, and solid content is 17%.Collapse component and the control of slow setting component is protected by polycarboxylic admixture
Concrete slump loss, wherein protecting component of collapsing and accounting for polycarboxylic admixture mass fraction is 10%-40%, and slow setting component accounts for
Polycarboxylic admixture mass fraction is 5%-20%.As shown in the table:
| Guarantor is collapsed component (%) | Slow setting component (%) | 5h concrete divergence loss (mm) |
| 10-20 | 15-20 | Free of losses |
| 20-30 | 10-15 | Free of losses |
| 30-40 | 5-10 | Free of losses |
And protecting component of collapsing in the present embodiment in polycarboxylic admixture is 25%, slow setting component is 13%.
By mixing water mix and blend 90s in agitated kettle of the great Shi weighed, gravelstone, ceramic polished micro mist and 60%
Stir；Remaining raw material is poured into stirring 300s in agitated kettle again, obtains concrete.Concrete performance such as following table institute
Show.Concrete construction is functional, without the phenomenon such as hole, honeycomb after form removal.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to be interpreted as limitation of the present invention, those of ordinary skill in the art without departing from the present invention principle and
Above-described embodiment can be changed within the scope of the invention in the case of objective, revise, replace and modification.
Claims (7)
1. one kind can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, it is characterised in that: described concrete
Raw material components and mass fraction proportioning be: 14%-15% cement, 3.5%-4.5% breeze, and 2.5%-3.5% pottery is thrown
Light micro mist, 1%-2% superfined flyash, 70% aggregate, 0.4%-0.6% polycarboxylic admixture, 6.4%-6.6% mix
Water；Described aggregate is made up of sand and stone, and sand coarse aggregate ratio scope is 44%-50%；Described sand is made up of medium sand and fine sand,
Described stone is made up of great Shi and gravelstone；Described medium sand modulus of fineness is 2.4-2.6, and described fine sand modulus of fineness is
1.9-2.1；Described great Shi particle diameter is 10-20mm, and described gravelstone particle diameter is 5-10mm.
A kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its feature
It is: medium sand is 7:3～5:5 with the mass ratio of fine sand.
The most according to claim 1 or claim 2 a kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its
It is characterised by: great Shi is 7:3～9:1 with the mass ratio of gravelstone.
A kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its feature
It is: described polycarboxylic admixture is adjusted component and gas by collapse component, diminishing component, slow setting component, viscosity of guarantor
Bubble adjusts component and constitutes, and water-reducing rate is 20-25%, and solid content is 15-20%；Polycarboxylic admixture is protected component of collapsing
Mass fraction be 10%-40%, the mass fraction of slow setting component is 5%-20%.
A kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its feature
It is: ceramic polished powder size range is 1-10 μm, specific surface area >=800m2/kg。
A kind of can 620 meters of super high pump-conveyings exempt from High-strength self-compaction concrete of shaking, its feature
Being: superfined flyash particle size distribution range is 1～5 μm, particle shape is spherical structure, specific surface area >=600m2/kg。
7. one kind can the preparation method of High-strength self-compaction concrete of exempting to shake of 620 meters of super high pump-conveyings, it is characterised in that: bag
Include following steps:
Step 1: weigh raw material according to the raw material components of following concrete and mass fraction proportioning: 14%-15% cement,
3.5%-4.5% breeze, the ceramic polished micro mist of 2.5%-3.5%, 1%-2% superfined flyash, 70% aggregate, 0.4%-0.6%
Polycarboxylic admixture, 6.4%-6.6% mixing water；Described aggregate is made up of sand and stone, and sand coarse aggregate ratio scope is 44%-50%；
Described sand is made up of medium sand and fine sand, and described stone is made up of great Shi and gravelstone；Described medium sand modulus of fineness is 2.4-2.6,
Described fine sand modulus of fineness is 1.9-2.1；Described great Shi particle diameter is 10-20mm, and described gravelstone particle diameter is 5-10mm；
Step 2: the mixing water of great Shi, gravelstone, ceramic polished micro mist and 60%～80% is mixed in stirring container and stirs
Mix 60～90s；Again remaining raw material is poured in stirring container and stir 240～300s, obtain concrete.
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| CN107721314A (en) * | 2017-11-10 | 2018-02-23 | 重庆富皇建筑工业化制品有限公司 | A kind of ready-mixed concrete containing seven graded aggregates and application thereof |
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| CN117125930A (en) * | 2023-08-24 | 2023-11-28 | 广州兴业混凝土搅拌有限公司 | C80 high-polishing self-compacting concrete and preparation method thereof |
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| CN106587711A (en) * | 2016-12-16 | 2017-04-26 | 上海建工材料工程有限公司 | Special additive for self-compacting concretes for concrete pouring in closed space |
| CN106587711B (en) * | 2016-12-16 | 2019-06-07 | 上海建工材料工程有限公司 | Special additive for self-dense concrete is used in a kind of perfusion of enclosure space |
| CN107721314A (en) * | 2017-11-10 | 2018-02-23 | 重庆富皇建筑工业化制品有限公司 | A kind of ready-mixed concrete containing seven graded aggregates and application thereof |
| CN108529975A (en) * | 2018-05-11 | 2018-09-14 | 郑涛涛 | A kind of concrete and preparation method thereof |
| CN109369114A (en) * | 2018-12-18 | 2019-02-22 | 中建西部建设(天津)有限公司 | A kind of self-compacting concrete |
| CN110606709A (en) * | 2019-04-12 | 2019-12-24 | 重庆建工建材物流有限公司 | Ultrahigh-strength self-compacting concrete for giant special-shaped steel pipe column and preparation method thereof |
| CN110451896A (en) * | 2019-09-18 | 2019-11-15 | 重庆大学 | The high-strength concrete of mixture viscosity is reduced based on admixture grain composition |
| CN117125930A (en) * | 2023-08-24 | 2023-11-28 | 广州兴业混凝土搅拌有限公司 | C80 high-polishing self-compacting concrete and preparation method thereof |
| CN117125930B (en) * | 2023-08-24 | 2024-03-08 | 广州兴业混凝土搅拌有限公司 | C80 high-polishing self-compacting concrete and preparation method thereof |
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Address after: 710199 Room 102, 10th Floor, Golden Antelope Building, 59 Aerospace Avenue, Xi'an Space Base, Shaanxi Province Co-patentee after: China Construction West Construction (Tianjin) Co., Ltd. Patentee after: Construction of North Ltd in West China Address before: 710199 Room 102, 10th Floor, Golden Antelope Building, 59 Aerospace Avenue, Xi'an Space Base, Shaanxi Province Co-patentee before: China State Construction Engre.(Tianjin) Corp. Ltd. Patentee before: CHINA STATE CONSTRUCTION READY MIX CONCRETE XI'AN CO., LTD. |