CN107777961B - High-strength self-compacting concrete easy for super high-rise pumping - 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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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
- C04B2111/2015—Sulfate resistance
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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
- C04B2111/40—Porous or lightweight materials
Abstract
The invention discloses high-strength self-compacting concrete easy for super high-rise pumping, which is characterized by comprising the following components in parts by weight: 144 parts of water 127-containing material, 330 parts of cement 230-containing material, 36-60 parts of fly ash, 45-70 parts of mineral powder, 70-100 parts of silica powder, 890 parts of coarse aggregate 860-containing material, 630 parts of fine aggregate 490-containing material, 6-10 parts of air-entraining polycarboxylic acid water reducing agent and 2-3 parts of air-entraining agent. The super-high-rise pumping unit has high strength, is easy for super-high-rise pumping, has good self-compaction performance, and is convenient for super-high-rise construction.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to high-strength self-compacting concrete easy for super high-rise pumping.
Background
The self-compacting concrete is a concrete with high fluidity and proper viscosity, does not segregate, can fill any gap in a template through reinforcing steel bars, is self-compacting under the action of gravity, belongs to a kind of high-performance concrete, and has the outstanding characteristics that a mixture has good working performance, can be uniformly compacted and filled and formed only by self weight without vibration even under the conditions of intensive reinforcing steel bars and complex shapes, brings great convenience for construction operation, simultaneously has the technical and economic effects of improving the quality of the concrete, improving the construction environment, accelerating the construction progress, improving the labor productivity, reducing the engineering cost and the like, and is called as the concrete technology with the most revolutionary development in the last decades.
At present, Chinese patent with the publication number of CN104402325B discloses a high-strength self-compacting heat-insulating concrete which is prepared by scientifically matching sea-mud high-performance spherical high-strength ceramsite as an aggregate with cement, fly ash, graded sand, water, a high-efficiency water reducing agent and cellulose ether on the basis of a self-compacting concrete technology. The dry apparent density of the obtained high-strength self-compacting heat-insulating concrete is 1200-2000kg/m3, the 28-day compressive strength is 15-60MPa, the heat conductivity coefficient is 0.15-0.5W/(m.K), the slump expansion degree is 650-750mm, the expansion time is 3-4 seconds, and the slump is more than or equal to 250 mm; the concrete has the advantages of light weight, high strength, high thermal insulation performance and self-compaction performance during pouring, can solve the problems of floating of light aggregate, segregation during pumping and the like during pouring and vibration of the traditional high-strength thermal insulation concrete, and can be widely applied to cast-in-place and prefabricated components of load-bearing and non-load-bearing walls, floors, roof boards, wallboards and the like in energy-saving buildings.
With the continuous deepening of cities, super high-rise building engineering and the like are more and more common in modern buildings, and super high-rise buildings are buildings with more than 40 floors or more than 100 meters in height, so concrete needs to be pumped to a construction position with a relatively high distance from the ground. The concrete required by the super high-rise buildings needs to have higher strength grade on one hand, and needs to have good working performance on the other hand, and can flow and be compact under the action of self gravity, and the template can be completely filled even if compact steel bars exist, and meanwhile, the concrete obtains good homogeneity without additional vibration, so that the super high-rise building construction is facilitated, and meanwhile, the concrete can be directly pumped to a higher vertical height.
However, the requirement on the pumpability of the concrete is high because the concrete is directly pumped to a higher vertical height, and the concrete has better pumpability, which means that the concrete has the properties of good fluidity, small resistance, no segregation, no bleeding, no pipeline blockage and the like. Therefore, in order to meet the continuous development of construction requirements, the development of concrete which has higher strength, is easy for pumping in an ultra-high layer and has good self-compaction performance is very important.
Disclosure of Invention
The invention aims to provide high-strength self-compacting concrete easy for super high-rise pumping, which has high strength, easy super high-rise pumping and good self-compacting performance and is convenient for super high-rise construction.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-strength self-compacting concrete easy to pump in an ultra-high layer comprises the following components in parts by weight:
the workability is improved by adding the fly ash, so that the self-compactness is improved, the mineral powder is beneficial to the concrete to resist the corrosion of external sulfate, the generation of concrete cracks and the growth of later length are controlled due to the improvement of the compactness, the cement consumption is reduced by adopting a double-doping method, the hydration heat is effectively reduced, the volume stability of the concrete is improved by utilizing the superposition effect, and the cost is saved; the addition of silica powder with granularity close to nanometer level can improve the pore structure, obviously increase the strength and the cohesion, and increase the capability of resisting layered segregation and preventing bleeding by matching with cement and fly ash with corresponding proportion, so that the concrete is not easy to separate water from aggregate even under the conditions of vibration state and pressure in the pumping process, and the condition of pipe blockage caused by uneven concrete due to segregation and bleeding is prevented, thereby being beneficial to super high-rise pumping; the invention has higher grout-to-bone ratio by matching with coarse aggregate and fine aggregate in corresponding proportion, ensures that the slump constant is more than or equal to 220mm, the expansion degree is more than or equal to 600mm, the filling property H is less than or equal to 5mm, and the fluidity is more than or equal to 700mm, thereby ensuring good self-compaction performance, and being beneficial to super high-rise construction because no vibration or less vibration is needed in the using process; the air entraining agent and the air entraining type polycarboxylate superplasticizer introduce a proper amount of stable and closed tiny bubbles into the concrete, so that the air content is controlled to be 3-5%, the freezing and thawing resistance of the concrete is favorably improved, and the total void ratio is increased after air entraining, but the closed bubbles which are not communicated obstruct a water channel and delay the invasion of water, so the impermeability strength is not reduced, but is improved; the introduced bubbles play a role similar to balls in the concrete, so that the fluidity of the concrete is greatly improved, the increase of the friction resistance of the concrete caused by overlarge cohesion is avoided, the pressure transmitted by a piston through water in the pumping process is enough to push the concrete, the workability of the concrete is improved, the phenomena of bleeding and segregation are reduced, the unit water consumption of the concrete can be reduced due to the improvement of the workability, and partial strength lost due to air entraining can be compensated by matching with silicon powder, so that the pumping of a super high-rise building and the self-compactness are facilitated; the air-entraining type polycarboxylate superplasticizer reduces slump loss and pump loss while reducing water consumption, has a certain viscosity reduction effect during super high-rise pumping, and prevents from being stuck on the pipe wall or even causing pump blockage.
Preferably, the air entraining agent comprises triterpenoid saponin, sodium dodecyl sulfate, and sodium alkyl phenol ether sulfosuccinate.
The stability of the bubbles is improved effectively after the sodium alkyl phenol ether sulfosuccinate is used as a nonionic surfactant and is matched with the sodium dodecyl sulfate, so that the stable and tiny bubbles with different sizes are introduced into the concrete, the bubbles with different sizes are arranged in a staggered manner, the fluidity is further improved, the phenomena of water secretion and segregation are reduced, and the self-compaction and the pumping of an ultra-high layer are improved.
Preferably, the air entraining agent also comprises seaweed powder.
The seaweed powder is a substance extracted from seaweed plants, the main component of hydroxypropyl methyl cellulose is mixed with water to form a colloid, the strength of concrete is increased while bubbles are introduced, and a retarding effect can be generated, so that the self-compaction of the concrete is facilitated.
Preferably, the mass ratio of the triterpenoid saponin to the sodium dodecyl sulfate to the sodium alkyl phenol ether sulfosuccinate to the seaweed powder is 1: 1.1-1.5: 0.3-0.7: 0.1-0.2.
The four components are mixed and added into the concrete according to corresponding proportions, and bubbles which are different in structure, quantity and size and are matched with each other are introduced, so that the distribution of the bubbles is facilitated, the flowability is improved, and meanwhile, the strength can be increased by a small amount of seaweed powder.
Preferably, the high-strength self-compacting concrete easy for ultra-high layer pumping also comprises 3-4 parts of vitrified micro bubbles.
The vitrified micro bubbles are added into concrete as lightweight aggregate, so that the workability, the self-resistance strength and the heat preservation of mortar can be improved, pumping of a super high layer is facilitated, bubbles introduced by matching with an air entraining agent are uniformly dispersed in the concrete, the integral density of the concrete is reduced, the quality of the concrete is lightened, construction of the super high layer is facilitated, and pumping of the super high layer is facilitated.
Preferably, the high-strength self-compacting concrete easy for ultra-high layer pumping also comprises 3-4 parts of an expanding agent.
The concrete is prevented from generating gaps on the side wall of the filling space after pouring, so that the self-compactness and the stability of the whole structure are improved.
Preferably, the fine aggregate comprises sand and ceramic sand, and the mass ratio of the sand to the ceramic sand is 1: 0.1-0.3.
The pottery sand is used as a light aggregate to be mixed with the sand, so that the overall density of the concrete is reduced, the quality of the concrete is reduced, the construction of a super high-rise is facilitated, the pumping of the super high-rise is facilitated, the sand and the pottery sand which are correspondingly proportioned enable the aggregate to have good gradation, the concrete can have good self-compactness, the concrete is guaranteed to be well lubricated in a pump pipe, and the layered segregation is avoided.
Preferably, the mass of the fine aggregate passing through the 0.3mm sieve and the 0.15mm sieve in the fine aggregate accounts for 15-30% and 5-10% of the total mass of the fine aggregate respectively.
The fine aggregate has larger influence on pumpability than the coarse aggregate, and the fine aggregate passing through the 0.3mm sieve and the 0.15mm sieve in the fine aggregate has great influence on the fluidity, segregation, bleeding, cohesiveness and air content of the mortar, and the control of the content of the fine aggregate is favorable for improving the pumpability of the concrete.
Preferably, the coarse aggregate is crushed stone with continuous particle size of 5-25mm, and the content of needle and flaky particles is less than 5%.
The broken stone with low needle and flake particle content can ensure that the coarse aggregate has good spherical particle shape, the continuous particle fraction ensures that the porosity of the aggregate is small, the impermeability is improved, the concrete is ensured to be well lubricated in a pump pipe, and the layered segregation is avoided.
Preferably, the high-strength self-compacting concrete easy for ultra-high layer pumping comprises the following components in parts by weight: 135 parts of water, 280 parts of cement, 46 parts of fly ash, 55 parts of mineral powder, 100 parts of silicon powder, 870 parts of coarse aggregate, 580 parts of fine aggregate, 8 parts of air-entraining polycarboxylic acid water reducing agent, 3 parts of air entraining agent, 4 parts of vitrified micro bubbles and 3 parts of expanding agent.
The invention has the advantages that:
1. the concrete is favorable for resisting the corrosion of external sulfate, and the generation of concrete cracks and the increase of later length are favorably controlled due to the improvement of compactness;
2. the strength and the cohesion are obviously improved, the capability of resisting layered segregation and preventing bleeding is improved, so that the concrete is not easy to separate water from aggregate even under the vibration state and the pressure condition in the pumping process, the condition of pipe blockage caused by uneven concrete due to segregation and bleeding is prevented, and the pumping of an ultra-high layer is facilitated;
3. the introduced bubbles play a role similar to balls in the concrete, so that the fluidity of the concrete is greatly improved, the increase of the friction resistance of the concrete caused by overlarge cohesion is avoided, the pressure transmitted by water by a piston in the pumping process is enough to push the concrete, the workability of the concrete is improved, and the phenomena of bleeding and segregation are reduced;
4. the mortar can improve the workability, the self-resistance strength and the heat preservation of the mortar, is beneficial to pumping of a super high layer, is matched with air entraining agents to introduce bubbles to be uniformly dispersed in concrete, simultaneously reduces the integral density of the concrete, lightens the quality of the concrete, is beneficial to super high layer construction and is beneficial to super high layer pumping.
Detailed Description
The invention is further illustrated by the following examples. It should be understood that the preparation methods described in the examples are only for illustrating the present invention and are not to be construed as limiting the present invention, and that the simple modifications of the preparation methods of the present invention based on the concept of the present invention are within the scope of the present invention as claimed.
All materials referred to in the examples of the present invention are commercially available.
Specific raw materials referred to in the examples are as in table 1:
TABLE 1 specification and manufacturer of each raw material
Example 1:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 70kg of silicon powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand, 10kg of an air-entraining polycarboxylic acid water reducing agent, 0.8kg of triterpenoid saponin, 0.9kg of sodium dodecyl sulfate and 0.25kg of sodium alkylphenol ether sulfosuccinate.
Example 2:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 70kg of silicon powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand, 10kg of an air-entraining polycarboxylic acid water reducing agent, 0.8kg of triterpenoid saponin, 0.9kg of sodium dodecyl sulfate, 0.25kg of sodium alkylphenol ether sulfosuccinate and 0.1kg of seaweed meal.
Example 3:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 70kg of silicon powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand, 10kg of an air-entraining polycarboxylic acid water reducing agent, 0.8kg of triterpenoid saponin, 0.9kg of sodium dodecyl sulfate, 0.25kg of sodium alkylphenol ether sulfosuccinate and 3.5kg of an expanding agent.
Example 4:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 70kg of silicon powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand, 10kg of an air-entraining polycarboxylic acid water reducing agent, 0.8kg of triterpenoid saponin, 0.9kg of sodium dodecyl sulfate, 0.25kg of sodium alkylphenol ether sulfosuccinate and 3.5kg of vitrified micro bubbles.
Example 5:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 70kg of silicon powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand, 10kg of an air-entraining polycarboxylic acid water reducing agent, 0.8kg of triterpenoid saponin, 0.9kg of sodium dodecyl sulfate, 0.25kg of alkylphenol ether sulfosuccinate sodium salt, 0.1kg of seaweed meal, 3.5kg of vitrified micro-beads and 3.5kg of an expanding agent.
Example 6:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 127kg of water, 230kg of cement, 54kg of fly ash, 64kg of mineral powder, 85kg of silicon powder, 890kg of broken stone, 500kg of sand, 130kg of ceramic sand, 6kg of an air-entraining polycarboxylic acid water reducing agent, 0.9kg of triterpenoid saponin, 1kg of sodium dodecyl sulfate, 0.3 kg of alkylphenol ether sulfosuccinate sodium salt, 0.1kg of seaweed meal, 3kg of vitrified micro bubbles and 4kg of an expanding agent.
Example 7:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 135kg of water, 280kg of cement, 46kg of fly ash, 55kg of mineral powder, 100kg of silicon powder, 870kg of broken stone, 480kg of sand, 100kg of ceramic sand, 8kg of an air-entraining polycarboxylic acid water reducing agent, 1kg of triterpenoid saponin, 1.2kg of sodium dodecyl sulfate, 0.6 kg of alkylphenol ether sulfosuccinate sodium salt, 0.2kg of seaweed powder, 4kg of vitrified micro bubbles and 3kg of an expanding agent.
Example 2 differs from example 1 in that seaweed meal is added; example 3 differs from example 1 in that a swelling agent is added; example 4 differs from example 1 in that vitrified micro beads are added; examples 5-7 differ from example 1 in the addition of seaweed meal, bulking agent and vitrified micro bubbles in different proportions. The results of performance testing of the high strength self-compacting concretes of examples 1-7 susceptible to ultra-high pumping according to the concrete quality control Standard (GB50164) are shown in Table 2:
TABLE 2 Performance testing of the high strength self-compacting concretes of examples 1-7 susceptible to ultra-high-rise pumping
Combining the above test results, example 7 has better performance, so the example is a more preferable scheme. The high strength self-compacting concrete susceptible to ultra-high layer pumping in example 7 comprises the following components in parts by weight: 135 parts of water, 280 parts of cement, 46 parts of fly ash, 55 parts of mineral powder, 100 parts of silicon powder, 870 parts of coarse aggregate, 580 parts of fine aggregate, 8 parts of air-entraining polycarboxylic acid water reducing agent, 3 parts of air entraining agent, 4 parts of vitrified micro bubbles and 3 parts of expanding agent.
Comparative example 1:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 70kg of silica powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand and 10kg of air-entraining polycarboxylic acid water reducing agent.
Comparative example 2:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand, 10kg of an air-entraining polycarboxylate water reducer, 0.8kg of triterpenoid saponin, 0.9kg of sodium dodecyl sulfate and 0.25kg of sodium alkylphenol ether sulfosuccinate.
Comparative example 3:
the high-strength self-compacting concrete easy to pump in the super high layer comprises the following components in parts by weight: 144kg of water, 330kg of cement, 36kg of fly ash, 70kg of mineral powder, 860kg of broken stone, 400kg of sand, 70kg of ceramic sand and 10kg of air-entraining polycarboxylic acid water reducing agent.
The comparative example differs from the examples in that:
comparative example 1 is different from example 1 in that triterpenoid saponin, sodium lauryl sulfate, and sodium alkylphenol ether sulfosuccinate as an air-entraining agent were not added in comparative example 1; comparative example 2 differs from example 1 in that no silicon powder was added in comparative example 1; comparative example 3 differs from example 1 in that no silicon powder and no triterpenoid saponin, sodium lauryl sulfate, sodium alkylphenol ether sulfosuccinate as air entraining agent were added in comparative example 1. The results of the performance tests according to the concrete quality control Standard (GB50164) on the high strength self-compacting concrete susceptible to ultra-high pumping of comparative examples 1 to 3 and examples 1 and 7 are shown in Table 3:
TABLE 3 Performance testing of high Strength self-compacting concretes susceptible to ultra-high layer Pumping for comparative examples 1-3 and examples 1, 7
It can be known from comparison of table 3 that only adding silica flour has a slight effect on improving strength, only adding air entraining agent has a slight effect on improving pumpability such as slump, expansion blocking, filling property and fluidity, but adding silica flour and air entraining agent simultaneously greatly improves various performances of concrete, remarkably improves strength and cohesion, increases the capability of resisting layered segregation and preventing bleeding, makes the concrete not easy to separate water from aggregate even under vibration state and pressure condition in the pumping process, prevents the condition of pipe blocking caused by nonuniform concrete due to segregation and bleeding, and is favorable for super high-rise pumping.
Claims (5)
1. A high-strength self-compacting concrete easy to pump in an ultra-high layer is characterized by comprising the following components in parts by weight:
the water is 127-144 parts by weight,
the cement is 230-330 parts,
36-60 parts of fly ash,
45-70 parts of mineral powder,
70-100 parts of silicon powder,
860 and 890 portions of coarse aggregate,
630 portions of fine aggregate 490 and 630 portions of fine aggregate,
6-10 parts of an air-entraining polycarboxylic acid water reducing agent,
2-3 parts of an air entraining agent;
the air entraining agent comprises triterpenoid saponin, sodium dodecyl sulfate and sodium alkyl phenol ether sulfosuccinate;
the air entraining agent also comprises seaweed powder;
the mass ratio of the triterpenoid saponin to the sodium dodecyl sulfate to the alkylphenol ether sulfosuccinate sodium salt to the seaweed powder is 1: 1.1-1.5: 0.3-0.7: 0.1-0.2;
the fine aggregate comprises sand and ceramic sand, and the mass ratio of the sand to the ceramic sand is 1: 0.1-0.3;
the mass of the fine aggregate passing through the 0.3mm sieve and the 0.15mm sieve respectively accounts for 15-30% and 5-10% of the total mass of the fine aggregate.
2. The high strength self-compacting concrete susceptible to ultra-high layer pumping of claim 1, wherein: the high-strength self-compacting concrete easy for super high-rise pumping also comprises 3-4 parts of vitrified micro bubbles.
3. The high strength self-compacting concrete susceptible to ultra-high layer pumping of claim 1, wherein: the high-strength self-compacting concrete easy for super high-rise pumping also comprises 3-4 parts of an expanding agent.
4. The high strength self-compacting concrete susceptible to ultra-high layer pumping of claim 1, wherein: the coarse aggregate is crushed stone with a continuous particle size of 5-25mm, and the content of needle and flaky particles is less than 5%.
5. The high strength self-compacting concrete susceptible to ultra-high layer pumping according to any one of claims 1-4, wherein: the high-strength self-compacting concrete easy for ultra-high layer pumping comprises the following components in parts by weight: 135 parts of water, 280 parts of cement, 46 parts of fly ash, 55 parts of mineral powder, 100 parts of silicon powder, 870 parts of coarse aggregate, 580 parts of fine aggregate, 8 parts of air-entraining polycarboxylic acid water reducing agent, 3 parts of air entraining agent, 4 parts of vitrified micro bubbles and 3 parts of expanding agent.
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| CN102320794A (en) * | 2011-08-25 | 2012-01-18 | 暨南大学 | High-strength concrete prepared by sea sand |
| CN103086668A (en) * | 2013-01-15 | 2013-05-08 | 北方工业大学 | Design method for mixing ratio of C60-grade pumping self-compacting steel tube recycled concrete |
| CN104310906A (en) * | 2014-10-16 | 2015-01-28 | 成都建工成新混凝土工程有限公司 | Structural lightweight aggregate concrete |
| CN104891908A (en) * | 2015-04-21 | 2015-09-09 | 中国十七冶集团有限公司 | C60 micro-expansive and self-compacted concrete |
| CN105859224A (en) * | 2016-05-13 | 2016-08-17 | 广州大学 | High-strength easily-pumped concrete prepared from hill sand |
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| EP2935143B1 (en) * | 2012-12-21 | 2017-09-27 | EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt | Fire resistant concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320794A (en) * | 2011-08-25 | 2012-01-18 | 暨南大学 | High-strength concrete prepared by sea sand |
| CN103086668A (en) * | 2013-01-15 | 2013-05-08 | 北方工业大学 | Design method for mixing ratio of C60-grade pumping self-compacting steel tube recycled concrete |
| CN104310906A (en) * | 2014-10-16 | 2015-01-28 | 成都建工成新混凝土工程有限公司 | Structural lightweight aggregate concrete |
| CN104891908A (en) * | 2015-04-21 | 2015-09-09 | 中国十七冶集团有限公司 | C60 micro-expansive and self-compacted concrete |
| CN105859224A (en) * | 2016-05-13 | 2016-08-17 | 广州大学 | High-strength easily-pumped concrete prepared from hill sand |
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