CN105622009B - A kind of ultra-high performance concrete matrix without silicon ash and preparation method thereof - Google Patents

A kind of ultra-high performance concrete matrix without silicon ash and preparation method thereof Download PDF

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Publication number
CN105622009B
CN105622009B CN201510982409.2A CN201510982409A CN105622009B CN 105622009 B CN105622009 B CN 105622009B CN 201510982409 A CN201510982409 A CN 201510982409A CN 105622009 B CN105622009 B CN 105622009B
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ultra
high performance
silicon ash
concrete
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CN105622009A (en
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黄伟
孙伟
郭丽萍
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Southeast University
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Southeast University
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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
    • C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material

Abstract

The invention discloses a kind of ultra-high performance concrete matrix without silicon ash and preparation method thereof, and in particular to application of the calcined clay in terms of low-carbon environment-friendly, ultra high performance cementitious, and the concrete substrate match ratio is：575.6~825.8kg/m of cement3, 130.0~140.0kg/m of calcined clay3, agstone (thin) 380.2~390.2kg/m3, agstone (thick) 380.2~390.2kg/m3, 424.2~436.8kg/m of quartz sand3, 6.74~12.81kg/m of additive3, 202.3~210.2kg/m of mixing water3.Calcined clay instead of the silicon ash in existing ultra-high performance concrete completely, significantly reduce the production cost of the concrete, and the mechanical property of basic holding concrete.

Description

A kind of ultra-high performance concrete matrix without silicon ash and preparation method thereof
Technical field
The present invention relates to the preparing technical field of civil engineering material, more particularly to a kind of low-carbon environment-friendly, superelevation Energy cement-base composite material and preparation method thereof.
Background technology
Ultra-high performance concrete (Ultra-High Performance Concrete, UHPC) is a kind of new cement Sill, its topmost feature be superelevation compression strength (>150MPa) with ultralow permeability.The appropriate steel by filling Fiber (≤4%) can prepare very-high performance fibre reinforced concrete (Ultra-High Performance Fiber Reinforced Concrete, UHPFRC), its have superelevation tensile property (>8MPa) with preferable strain-hardening property (1.5‰).Because with special superperformance, the material can meet the engineer applied under many extreme environments, particularly To the recovery project of already present infrastructure.However, UHPC is but difficult to large-scale use in Practical Project, its is topmost Reason is costly, and substantial amounts of expensive components, such as cement and silicon ash are contained especially in UHPC match ratios.Traditional In UHPC, cement content is 1100-1300kg/m3, silicon ash content is 200-350kg/m3, account for the 18-26% of cement quality.
Due to water content (W/B=0.14-0.20) ultralow UHPC, the degree of hydration of cement only has 30-40%, silicon ash The extent of reaction is about 30%, it means that substantial amounts of unhydrated clinker particles and unreacted silicon ash particle are intended only as costliness Packing material use, waste resource.Therefore, it is necessary to partially or completely be replaced using mineral admixture in UHPC match ratios Cement and silicon ash.However, almost all of researcher will study the cement content that center of gravity is concentrated in reduction UHPC at present And optimization different minerals admixture ratio, from the market visible UHPC finished products and Ke Cha on UHPC patents from the point of view of, Silicon ash is still the important composition composition of one " can not substitute ".
Silicon ash is a kind of ultrafine granular materials, space that can be between filling concrete particle, and due to its master It is amorphous silica to want composition, and reactivity is high, and the calcium hydroxide reaction that can be produced with hydrated cementitious generates aquation silicon Sour calcium gel C-S-H, is favorably improved the intensity of concrete, therefore silicon ash is widely used in high-performance, ultra-high performance concrete In.However, the market price of silicon ash is extremely expensive, it is more than the three times of ordinary cement price.Therefore design a kind of without silicon ash Ultra-high performance concrete and do not lose its excellent mechanical property, as at present further reduction UHPC production costs pass Key.
The content of the invention：
Technical problem：In order to overcome the above-mentioned deficiencies of the prior art and defect, the present invention utilizes calcined clay and different grains The agstone in footpath prepares a kind of ultra-high performance concrete without silicon ash of environment-friendly type as the packing material for substituting silicon ash Matrix, while providing its a kind of preparation method.
The content of the invention：In order to solve the above technical problems, the invention provides a kind of ultra-high performance concrete without silicon ash Matrix, the composition composition and proportioning of the concrete substrate is as follows：
The cement is sulfate-resistant cement CEMI52.5N, and mineral composition is tricalcium silicate C3S 62.35%, silicic acid two Calcium C2S 20.28%, tricalcium aluminate C3A 1.42%, tetra calcium aluminoferrite C4AF 5.83%, specific surface area BET 940m2/ kg, it is close Spend 3150kg/m3, grain graininess D5010.21μm；
The calcined clay SiO2Content=50~55%, Al2O3Content=40~45%, kaolinite content=75%~ 100%, specific surface area BET=9600~15300m2/ kg, grain graininess D505.0~5.5 μm；
The microlith limestone flour CaCO3Content=97.61%, specific surface area BET=3370m2/ kg, density=2700kg/ m3, grain graininess D50=2.57 μm；
Rubble the limestone flour () CaCO3Content=97.61%, specific surface area BET=150m2/ kg, density= 2700kg/m3, grain graininess D50=26.50 μm；
The quartz sand particle granularity D50240.80μm；
The additive is high-efficiency polycarboxylic acid water reducer, and solid content is 25%.
Present invention also offers a kind of preparation method of the ultra-high performance concrete matrix without silicon ash, this method is included such as Lower step：
Step 1：Cement, calcined clay, agstone and quartz sand are weighed by formula rate to pour into agitated kettle, low speed, That is 61.5rpm stirs 3min；
Step 2：Additive and water are weighed by formula rate, is poured slowly into agitated kettle, the stirring of low speed, i.e. 61.5rpm is straight To formation liquid slurry；
Step 3：Powder body material formation liquid slurry is treated, at a high speed, i.e. 123rpm stirrings 3min；
Step 4：After 3min stirrings terminate, continue stirring at low speed 1min；
Step 5：The slurry mixed is poured slowly into punching block, sealed maintenance 1 day；
Step 6：Form removal after 1 day, the matrix test specimen after hardening is placed in the curing box under the conditions of 20 DEG C, is carried out sealing and is supported Shield.
The ultra-high performance concrete matrix without silicon ash prepared by the present invention, can be used for preparing bridge member, football Ceiling is big across prefabricated components such as thin-wall construction, the concrete components of Special complex shape, can also as a kind of repair materials, For damaged bridge floor and road surface, or as a kind of protective materials, for the concrete facility under adverse circumstances, such as in ocean Beacon pedestal on islands and reefs.
Beneficial effect：The present invention compared with prior art, with advantages below：
The present invention is based on particle packing model, instead of the silicon in existing ultra-high performance concrete completely using calcined clay Ash, significantly reduces the production cost of the concrete, while keeping basic mechanical property, such as compression strength is constant.It is logical The agstone of admixture different-grain diameter is crossed, the particle packing of concrete substrate is optimized.In simple molding technological condition and close Close under curing condition, successfully prepared the ultra-high performance concrete matrix that 28 days compression strength reaches 150MPa or so.
Compared with domestic and international similar technique, changing an achievement has following characteristic：(1) cost performance is high.The present invention has cast out biography The silicon ash for ultra-high performance concrete " can not substitute " and the costliness of uniting, significantly reduces the production cost of concrete, and basic energy The mechanical property for keeping the concrete excellent.(2) raw material are simple and easy to get.Raw material used in the present invention come from common Cement-base composite material prepares required conventional material, and does not need complicated PROCESS FOR TREATMENT.(3) easy construction.The present invention The ultra-high performance concrete good fluidity of preparation, matrix can play good synergy with steel fibre, can reach self-compaction State, can be applied in the engineering of complicated special shape.(4) ecological, environmental protective, energy-saving and emission-reduction.Superelevation prepared by the present invention Performance concrete matrix is not needed in steam curing and water and conserved, it is only necessary to the curing in airtight condition under normal temperature condition, while can drop The production cost of low carbon dioxide emission amount and concrete.
Embodiment
The ultra-high performance concrete matrix without silicon ash of the present invention, can enter according to practical application needs to match ratio Row fine setting, the performance required for obtaining.
Following examples are provided with reference to present invention, but the invention is not restricted to following examples：
A kind of ultra-high performance concrete matrix without silicon ash that the present invention is provided, the concrete substrate composition composition and Proportioning is as follows：
The cement is sulfate-resistant cement CEMI52.5N, and mineral composition is tricalcium silicate C3S 62.35%, silicic acid two Calcium C2S 20.28%, tricalcium aluminate C3A 1.42%, tetra calcium aluminoferrite C4AF 5.83%, specific surface area BET 940m2/ kg, it is close Spend 3150kg/m3, grain graininess D5010.21μm；
The calcined clay SiO2Content=50~55%, Al2O3Content=40~45%, kaolinite content=75%~ 100%, specific surface area BET=9600~15300m2/ kg, grain graininess D505.0~5.5 μm；
The microlith limestone flour CaCO3Content=97.61%, specific surface area BET=3370m2/ kg, density=2700kg/ m3, grain graininess D50=2.57 μm；
Rubble the limestone flour () CaCO3Content=97.61%, specific surface area BET=150m2/ kg, density= 2700kg/m3, grain graininess D50=26.50 μm；
The quartz sand particle granularity D50240.80μm；
The additive is high-efficiency polycarboxylic acid water reducer, and solid content is 25%.
The present invention also provides a kind of preparation method of the ultra-high performance concrete matrix without silicon ash, and this method includes as follows Step：
Step 1：Cement, calcined clay, agstone and quartz sand are weighed by formula rate to pour into agitated kettle, low speed, That is 61.5rpm stirs 3min；
Step 2：Additive and water are weighed by formula rate, is poured slowly into agitated kettle, the stirring of low speed, i.e. 61.5rpm is straight To formation liquid slurry；
Step 3：Powder body material formation liquid slurry is treated, at a high speed, i.e. 123rpm stirrings 3min；
Step 4：After 3min stirrings terminate, continue stirring at low speed 1min；
Step 5：The slurry mixed is poured slowly into punching block, sealed maintenance 1 day；
Step 6：Form removal after 1 day, the matrix test specimen after hardening is placed in the curing box under the conditions of 20 DEG C, is carried out sealing and is supported Shield.
Embodiment 1
Wherein, calcined clay SiO2Content 52.0%, Al2O3Content 43.8%, kaolinite content is 95%, specific surface area (BET)=9650m2/ kg, grain graininess (D50)=5.1 μm.The surpassing without silicon ash that said components are prepared by previous process High performance concrete matrix, measure its mix slurry divergence and hard solids mechanical property it is as follows：
Divergence 360.0mm, matrix compression strength 14 days is 134.1MPa, and 28 days are 138.2MPa, are within 56 days 141.1MPa。
Embodiment 2
Wherein, calcined clay SiO2Content 51.8%, Al2O3Content 42.4%, kaolinite content is 79%, specific surface area (BET)=15250m2/ kg, grain graininess (D50)=5.1 μm.Said components by previous process prepare without silicon ash Ultra-high performance concrete matrix, measure its mix slurry divergence and hard solids mechanical property it is as follows：
Divergence 390.0mm, matrix compression strength 14 days is 141.9MPa, and 28 days are 150.7MPa, are within 56 days 154.1MPa。

Claims (2)

1. a kind of ultra-high performance concrete matrix without silicon ash, it is characterised in that：The composition of the concrete substrate is constituted and matched somebody with somebody Than as follows：
The cement is sulfate-resistant cement CEM I 52.5N, and mineral composition is tricalcium silicate C3S 62.35%, dicalcium silicate C2S 20.28%, tricalcium aluminate C3A 1.42%, tetra calcium aluminoferrite C4AF 5.83%, specific surface area BET=940m2/ kg, it is close Spend for 3150kg/m3, grain graininess D50=10.21 μm；
The calcined clay SiO2Content=50~55%, Al2O3Content=40~45%, kaolinite content=75%~ 100%, specific surface area BET=9600~15300m2/ kg, grain graininess D50=5.0~5.5 μm；
CaCO in the microlith limestone flour3Content=97.61%, specific surface area BET=3370m2/ kg, density=2700kg/m3, Grain graininess D50=2.57 μm；
CaCO in the rubble limestone flour3Content=97.61%, specific surface area BET=150m2/ kg, density=2700kg/m3, Grain graininess D50=26.50 μm；
The quartz sand particle granularity D50=240.80 μm；
The additive is high-efficiency polycarboxylic acid water reducer, and solid content is 25%.
2. a kind of preparation method of the ultra-high performance concrete matrix as claimed in claim 1 without silicon ash, it is characterised in that This method comprises the following steps：
Step 1：Cement, calcined clay, agstone and quartz sand are weighed by formula rate to pour into agitated kettle, low speed, i.e., 61.5rpm stirs 3min；
Step 2：Additive and water are weighed by formula rate, is poured slowly into agitated kettle, the stirring of low speed, i.e. 61.5rpm is until shape Into liquid slurry；
Step 3：Powder body material formation liquid slurry is treated, at a high speed, i.e. 123rpm stirrings 3min；
Step 4：After 3min stirrings terminate, continue stirring at low speed 1min；
Step 5：The slurry mixed is poured slowly into punching block, sealed maintenance 1 day；
Step 6：Form removal after 1 day, the matrix test specimen after hardening is placed in the curing box under the conditions of 20 DEG C, carries out sealed maintenance.
CN201510982409.2A 2015-12-23 2015-12-23 A kind of ultra-high performance concrete matrix without silicon ash and preparation method thereof Active CN105622009B (en)

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CH714974A1 (en) * 2018-05-09 2019-11-15 Baustoffe Schollberg Ag Ultra-high-performance concrete.
CN110281392A (en) * 2019-07-08 2019-09-27 黄贺明 A kind of ultra-high performance concrete vacuum stirring technique
CN110281393A (en) * 2019-07-08 2019-09-27 黄贺明 A kind of ultra-high performance concrete frequency conversion type stirring technique
CN110317022B (en) * 2019-07-15 2021-09-10 广东盖特奇新材料科技有限公司 Vacuum variable-frequency stirring process for ultrahigh-performance concrete
CN110835251A (en) * 2019-12-10 2020-02-25 华东交通大学 Ultrahigh-performance concrete and preparation method thereof
CN113620672B (en) * 2021-09-09 2022-10-28 武汉理工大学 Partially calcined limestone-calcined clay cement-based material and preparation method thereof
CN115057674A (en) * 2022-05-27 2022-09-16 中建西部建设湖南有限公司 Preparation method of low-carbon type ultrahigh-performance concrete
CN115772020A (en) * 2023-01-31 2023-03-10 北京城建集团有限责任公司 Novel ultra-high performance concrete for large member and large volume structure

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JP3975087B2 (en) * 2001-01-30 2007-09-12 太平洋セメント株式会社 High performance concrete
CN101215138A (en) * 2008-01-04 2008-07-09 东南大学 Slag mixed active powder concrete
CN103524093B (en) * 2013-08-22 2015-09-02 厦门天润锦龙建材有限公司 A kind of super high strength concrete
CN103553450B (en) * 2013-09-29 2015-09-09 江苏名和集团有限公司 A kind of lightweight self-compacting concrete and preparation method thereof

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