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CN105070338B - GFRP (glass fiber reinforced Polymer) reinforcement reinforced sacrificial concrete and preparation method thereof - Google Patents

GFRP (glass fiber reinforced Polymer) reinforcement reinforced sacrificial concrete and preparation method thereof Download PDF

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Publication number
CN105070338B
CN105070338B CN201510419388.3A CN201510419388A CN105070338B CN 105070338 B CN105070338 B CN 105070338B CN 201510419388 A CN201510419388 A CN 201510419388A CN 105070338 B CN105070338 B CN 105070338B
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gfrp
sacrificial concrete
water
sacrificial
principal rods
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CN105070338A (en
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李绍纯
金祖权
蒋金洋
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Qingdao University of Technology
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Qingdao University of Technology
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention belongs to the technical field of nuclear power construction, and relates to GFRP (glass fiber reinforced Polymer) bar reinforced sacrificial concrete and a preparation method thereof, wherein the GFRP bar reinforced sacrificial concrete is formed by pouring sacrificial concrete slurry into a GFRP bar framework, a GFRP stirrup binds a first GFRP stress bar and a second GFRP stress bar to form the GFRP bar framework with a cuboid structure, the first GFRP stress bar is uniformly distributed at the top end of the GFRP bar framework, and the second GFRP stress bar is uniformly distributed at the bottom end of the GFRP bar framework; the sacrificial concrete slurry consists of P.I cement, water, a water reducing agent, iron ore, quartz stone, fly ash and fibers, wherein the weight percentages of the components are as follows: 9-20% of P.I cement, 35-45% of iron ore, 20-35% of quartz stone, 3-9% of fly ash, 0.9-2.5% of fiber, 4-7% of water, 0.8-1.2% of water reducing agent and 100% of total amount; simple structure, simple preparation method, low cost, strong crack resistance and long service life.

Description

A kind of GFRP tendons enhancing sacrificial concrete and preparation method thereof
Technical field:
The invention belongs to nuclear power construction technical field, and it is mixed to be related to a kind of GFRP (fiberglass reinforced plastics) muscle enhancing sacrifice Solidifying soil and preparation method thereof.
Background technology:
Sacrificial concrete component is the important component of third generation EPR nuclear power plant reactor cores.When nuclear power station occurs sternly During weight accident, reactor core element can melt in the case of cooling not in time, and melt temperature may be up to 3000~ 4000 DEG C, fusant causes lower head of pressure vessel to fail, and then flows into reactor cavity and concrete material reaction concrete Melt decomposition temperature and there was only 1100 DEG C or so, fusant starts down-cutting errosion bottom plate, produces a large amount of non-condensable gas, improves safety The pressure of shell, once bottom plate is fused, the integrality of containment is lost, and a large amount of emissivity rays will leak, it is possible to cause difficulty With the consequence of appraisal.In order to improve the security of nuclear power station, sacrificial concrete component must have enough stability to provide Time needed for fusant aggregation, the temperature of fusant is reduced by chemically reacting, and is fired with reducing the density of oxide and core The radiation value of material.Therefore, sacrificial concrete component not only needs very high intensity, cracking resistance, and is needed on component Meet certain requirement (especially Fe2O3And SiO2Component), experimental molten oxide experiment display, existing common building It can only meet intensity requirement with concrete component, and be difficult to meet sacrificial concrete component in terms of crack resistance, chemical composition It is required that, it is difficult to reactor core is played a role.
The content of the invention:
It is an object of the invention to overcome shortcoming existing in the prior art, design provides a kind of GFRP tendons enhancing and sacrifices coagulation Soil and preparation method thereof, makes the reactor core that it is constructed to improve reactor core fusant when major accident occurs for nuclear power station Characteristic is cooled down with its heat flow density, quickening reactor core fusant is reduced, and alleviates the serious consequence of nuclear accident.
To achieve these goals, GFRP tendons of the present invention enhancing sacrificial concrete by sacrificial concrete slurry pour in Formed in GFRP tendons skeleton, the first GFRP principal rods and the 2nd GFRP principal rods are bound to form rectangular parallelepiped structure by GFRP stirrups GFRP tendons skeleton, the first GFRP principal rods are evenly distributed on the top of GFRP tendons skeleton, and the 2nd GFRP principal rods are evenly distributed on The bottom of GFRP tendons skeleton;Sacrificial concrete is starched by P.I cement, water, water-reducing agent, iron ore, quartz, flyash and fiber group Into the percentage by weight of each component is:P.I cement 9~20%, iron ore 35~45%, quartz 20~35%, flyash 3 ~9%, fiber 0.9~2.5%, water 4~7%, water-reducing agent 0.8~1.2%, total amount 100%.
Fiber of the present invention includes glass fibre, PP fibers and basalt fibre.
The method that the present invention prepares GFRP tendons enhancing sacrificial concrete includes template construct, the binding of GFRP tendons skeleton, sacrifices Prepared by concrete grout and sacrificial concrete slurry pours four steps, its detailed process is:
(1), template construct:Use template frame of the wooden template construct size for 172mm × 172mm × 900mm:
(2), GFRP tendons skeleton is bound:The position of the first GFRP principal rods and the 2nd GFRP principal rods is fixed, is bound round with GFRP Muscle binds the first GFRP principal rods and the 2nd GFRP principal rods into the GFRP tendons skeleton that size is 72mm × 72mm × 800mm, Then GFRP tendons skeleton is positioned over inside template frame:First GFRP principal rods and the 2nd GFRP principal rods are used using a diameter of The GFRP principal rods of 12mm;
(3), prepared by sacrificial concrete slurry:According to the raw material proportioning of regulation, by P.I cement, iron ore, quartz and fine coal 2min is mixed in ash, adds fiber stirring 1min, is eventually adding water-reducing agent and water stirring 2min, sacrifice coagulation is prepared Soil paste;
(4), sacrificial concrete slurry pours:Sacrificial concrete slurry is poured into the template frame for placing GFRP tendons skeleton, is shaken 24h is stood after smashing 1min, template frame of then dismantling, that is, be made GFRP tendons enhancing sacrificial concrete.
Compared with prior art, the present invention has the following advantages:First, the main component SiO of GFRP2Formed at high temperature Glassy matrix, can not only contain has radioactive fission product, prevents it from diffusing in external environment, moreover it is possible to further The activity that fusant (zirconium) carries out energy response with water is reduced, avoids generation nuclear power generating sets hydrogen caused by zirconium is reacted with water quick-fried It is fried;Second, the fiber in sacrificial concrete slurry is split with the resistance of stronger cracking resistance and toughening effect, concrete component is significantly improved Shrinkage cracking cracks with thermal shock, and component is had good ductility and shock resistance, increases substantially nuclear power sacrificial concrete Performance;Third, organically combined GFRP tendons and the characteristic of sacrificial concrete, can at high temperature with the other meltings of reactor core Thing interacts, and reduces the temperature of reactor core fusant, the preliminary characteristic for changing molten mixture, and the height for reducing reactor core fusant is put Penetrating property component, reduces the increase of containment internal pressure, meets the requirements as reactor core construction material;Its structure Simply, preparation method is easy, and cost is low, and cracking resistance is strong, service life length.
Brief description of the drawings:
Fig. 1 strengthens the agent structure principle schematic of sacrificial concrete, including the first GFRP for GFRP tendons of the present invention Principal rod 1, sacrificial concrete slurry 2,3 and the 2nd GFRP principal rods 4 of GFRP stirrups.
Embodiment:
The invention will be further described by way of example and in conjunction with the accompanying drawings.
GFRP tendons enhancing sacrificial concrete is poured in shape in GFRP tendons skeleton by sacrificial concrete slurry 2 described in the present embodiment Into, the first GFRP principal rods 1 and the binding of the 2nd GFRP principal rods 4 are formed the GFRP tendons skeleton of rectangular parallelepiped structure by GFRP stirrups 3, First GFRP principal rods 1 are evenly distributed on the top of GFRP tendons skeleton, and the 2nd GFRP principal rods 4 are evenly distributed on GFRP tendons skeleton Bottom;Sacrificial concrete slurry 2 is made of P.I cement, water, water-reducing agent, iron ore, quartz, flyash and fiber, each component Percentage by weight be:P.I cement 9~20%, iron ore 35~45%, quartz 20~35%, flyash 3~9%, fiber 0.9~2.5%, water 4~7%, water-reducing agent 0.8~1.2%.
Fiber described in the present embodiment includes glass fibre, PP fibers and basalt fibre.
The method that the present embodiment prepares GFRP tendons enhancing sacrificial concrete includes template construct, GFRP tendons skeleton binds, is sacrificial Prepared by domestic animal concrete grout and sacrificial concrete slurry pours four steps, its detailed process is:
(1), template construct:Use template frame of the wooden template construct size for 172mm × 172mm × 900mm:
(2), GFRP tendons skeleton is bound:The position of the first GFRP principal rods 1 and the 2nd GFRP principal rods 4 is fixed, uses GFRP First GFRP principal rods 1 and the 2nd GFRP principal rods 4 are bound into the GFRP tendons that size is 72mm × 72mm × 800mm by stirrup 3 GFRP tendons skeleton, is then positioned over inside template frame by skeleton:First GFRP principal rods 1 and the 2nd GFRP principal rods 4 are adopted With the GFRP principal rods of a diameter of 12mm;
(3), prepared by sacrificial concrete slurry:According to the raw material proportioning of regulation, by P.I cement, iron ore, quartz and fine coal 2min is mixed in ash, adds fiber stirring 1min, is eventually adding water-reducing agent and water stirring 2min, sacrifice coagulation is prepared Soil paste;
(4), sacrificial concrete slurry pours:Sacrificial concrete slurry is poured into the template frame for placing GFRP tendons skeleton, is shaken 24h is stood after smashing 1min, template frame of then dismantling, that is, be made GFRP tendons enhancing sacrificial concrete.
Embodiment 1:
The present embodiment makes GFRP tendons enhancing sacrificial concrete component according to Fig. 1, and sacrificial concrete slurry 2 is by P.I cement, iron Ore, quartz, flyash, miberal powder, glass fibre, water-reducing agent, water, which are stirred, to be formed, and the percentage by weight of each component is: P.I cement 13%, iron ore 41.1%, quartz 33%, flyash 5%, glass fibre 1%, water 6%, water-reducing agent 0.9%, Template first is made according to GFRP tendons enhancing sacrificial concrete scantling, then binds GFRP tendons skeleton, finally pours sacrifice coagulation Soil paste, is tested after maintenance, during test, reference《Standard for test methods of mechanical properties of ordinary concrete》(GB/T 50081- 2002) strength test, reference are carried out《Standard for test methods of longterm performance and durability of ordinary concrete standard》(GB/T 50082- 2009) cracking performance test is carried out, result of the test surface, which is IV grades, by 1000 DEG C of height After temperature processing, there is microcrack and roomy crack, but there is no Decrepitation Phenomena, residual strength is the 31% of initial strength, The integrality of self structure can be kept completely.
Embodiment 2:
The present embodiment makes GFRP tendons enhancing sacrificial concrete component according to Fig. 1, and the sacrificial concrete slurry is by P.I water Mud, iron ore, quartz, flyash, PP fibers, water-reducing agent, water are stirred and form, and the percentage by weight of each component is:P.I Cement 17%, iron ore 37.5%, quartz 33%, flyash 3%, PP fibers 1.5%, water 7%, water-reducing agent 1.0%, first according to Template is made according to GFRP tendons enhancing sacrificial concrete scantling, then binds GFRP tendons skeleton, finally pours sacrificial concrete slurry, Tested after maintenance, during test, reference《Standard for test methods of mechanical properties of ordinary concrete》(GB/T 50081-2002) into Row strength test, reference《Standard for test methods of longterm performance and durability of ordinary concrete standard》(GB/T50082-2009) carry out Cracking performance is tested.Result of the test surface, which is IV grades, after 1000 DEG C of high-temperature process, Only occur microcrack on surface, Decrepitation Phenomena does not occur, residual strength is the 27% of initial strength, can be kept completely The integrality of self structure.
Embodiment 3:
The present embodiment makes GFRP tendons enhancing sacrificial concrete component according to Fig. 1, and the sacrificial concrete slurry 2 is by P.I water Mud, iron ore, quartz, flyash, basalt fibre, water-reducing agent, water, which are stirred, to be formed, the percentage by weight of each component For:P.I cement 14%, iron ore 42.1%, quartz 34%, flyash 2%, basalt fibre 0.9%, water 6%, water-reducing agent 1.0%, template first is made according to GFRP tendons enhancing sacrificial concrete scantling, then GFRP tendons skeleton is bound, finally pour sacrificial Domestic animal concrete grout, is tested after maintenance, during test, reference《Standard for test methods of mechanical properties of ordinary concrete》(GB/ T50081-2002 strength test, reference) are carried out《Standard for test methods of longterm performance and durability of ordinary concrete standard》(GB/T 50082-2009) carry out cracking performance test.Result of the test surface, which is IV grades, by 1000 DEG C high-temperature process after, there is microcrack, but there is no Decrepitation Phenomena, residual strength is the 18% of initial strength, completely It can keep the integrality of self structure.

Claims (1)

1. a kind of GFRP tendons strengthen sacrificial concrete, it is characterised in that are poured by sacrificial concrete slurry in shape in GFRP tendons skeleton Into, the first GFRP principal rods and the 2nd GFRP principal rods are bound the GFRP tendons skeleton to form rectangular parallelepiped structure by GFRP stirrups, the One GFRP principal rods are evenly distributed on the top of GFRP tendons skeleton, and the 2nd GFRP principal rods are evenly distributed on the bottom of GFRP tendons skeleton End;Sacrificial concrete slurry is stirred by P.I cement, iron ore, quartz, flyash, glass fibre, water-reducing agent, water to be formed, The percentage by weight of each component is:P.I cement 13%, iron ore 41.1%, quartz 33%, flyash 5%, glass fibre 1%, water 6%, water-reducing agent 0.9%;Include template construct during preparation, GFRP tendons skeleton is bound, prepared by sacrificial concrete slurry and sacrificial Four steps of domestic animal concreting, its detailed process are:
(1), template construct:Use template frame of the wooden template construct size for 172mm × 172mm × 900mm:
(2), GFRP tendons skeleton is bound:The position of the first GFRP principal rods and the 2nd GFRP principal rods is fixed, will with GFRP stirrups The GFRP tendons skeleton of first GFRP principal rods and the binding of the 2nd GFRP principal rods into size for 72mm × 72mm × 800mm, then GFRP tendons skeleton is positioned over inside template frame:First GFRP principal rods and the 2nd GFRP principal rods use a diameter of 12mm GFRP principal rods;
(3), prepared by sacrificial concrete slurry:According to the percentage by weight of each component, by P.I cement, iron ore, quartz and fine coal 2min is mixed in ash, adds glass fibre stirring 1min, is eventually adding water-reducing agent and water stirring 2min, sacrifice is prepared Concrete grout;
(4), sacrificial concrete slurry pours:Sacrificial concrete slurry is poured into the template frame for placing GFRP tendons skeleton, is vibrated 24h is stood after 1min, template frame of then dismantling, that is, be made GFRP tendons enhancing sacrificial concrete.
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CN108751868B (en) * 2018-07-17 2020-12-08 南京林业大学 Siliceous nuclear power sacrificial material and preparation method thereof
CN108840626B (en) * 2018-07-17 2021-02-02 南京林业大学 Ferrosilicon nuclear electricity sacrificial material and preparation method thereof
CN112960951A (en) * 2021-03-01 2021-06-15 中冶建筑研究总院有限公司 Precast structure combined by concrete and fiber composite bars and concrete preparation method

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