WO2015055878A1 - Béton autocompactant à haute résistance et son procédé d'obtention - Google Patents

Béton autocompactant à haute résistance et son procédé d'obtention Download PDF

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Publication number
WO2015055878A1
WO2015055878A1 PCT/ES2014/070775 ES2014070775W WO2015055878A1 WO 2015055878 A1 WO2015055878 A1 WO 2015055878A1 ES 2014070775 W ES2014070775 W ES 2014070775W WO 2015055878 A1 WO2015055878 A1 WO 2015055878A1
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WIPO (PCT)
Prior art keywords
proportion
composition
concrete
composition according
aggregate
Prior art date
Application number
PCT/ES2014/070775
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English (en)
Spanish (es)
Inventor
Edouard Gonzalez Roubaud
David Perez Osorio
Cristina Prieto Rios
José RODRIGUEZ MONTERO
Lázaro José BAILÓN PÉREZ
Original Assignee
Abengoa Solar New Technologies, S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Abengoa Solar New Technologies, S.A. filed Critical Abengoa Solar New Technologies, S.A.
Publication of WO2015055878A1 publication Critical patent/WO2015055878A1/fr

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Classifications

    • 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
    • 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
    • C04B2111/00103—Self-compacting mixtures
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to the composition of a self-compacting concrete of high compressive strength. This concrete reaches compressive strengths greater than 100 MPa at 28 days while maintaining its self-compacting property.
  • the present invention relates to the process of obtaining high-strength self-compacting concrete and its use as structural concrete for structures such as prestressed and post-tensioned structures, bridges, tunnels, foundations, buildings, nuclear reactors, accumulators, tanks and tanks. storage. Therefore, the invention could be framed in the field of construction, in architectural and engineering works.
  • compositions that combine properties of high compressive strength and self-compactability:
  • US20080153942 describes a polymer concrete that combines the properties of self-compactability and compressive strength, and which is characterized by the total removal of Portland cement as a binding or bonding agent, and the total removal of water as a catalyst or hardening agent.
  • This composition represents an alternative to concrete rather than being considered a type of concrete, since it forms a compound that does not contain the usual component materials of a concrete.
  • EP0934915 describes a self-compacting calcined bauxite concrete reinforced with steel fibers that reaches up to 200 MPa at 28 days.
  • the present invention relates to a composition of a self-compacting concrete of high compressive strength, greater than 100 MPa at 28 days, and the method of obtaining said composition. It is composed of materials of economic cost for what supposes a very profitable product. Regarding the procedure for obtaining, one of the advantages to highlight is that this procedure is carried out at room temperature, specifically at temperatures between 10 and 35 ° C.
  • the present invention relates to the use of this composition as structural concrete structures such as prestressed and post-tensioned structures, bridges, tunnels, foundations, buildings, nuclear reactors, accumulators, tanks and storage tanks.
  • the present invention relates to a composition of a high strength concrete, greater than 100 MPa at 28 days, and self compacting comprising:
  • metacaolin in a proportion between 40 to 80 kg / m 3 ,
  • composition of the invention contain washed sand, a term known to any person skilled in the art, where the sand has a very low fine content, preferably less than about 15%.
  • fine aggregate means one with a grain size of less than 4 mm and "coarse aggregate” means one with a grain size of less than 1.2 mm.
  • the aggregate is preferably a limestone aggregate.
  • the aggregate is a combination of washed sand with a granulometry of 0 to 4 mm (0/4 sand) and gravel with a granulometry of 2 to 8 mm (gravel 2/8). More preferably, it is a combination of between 650 and 950 kg / m 3 of washed sand, preferably 0/4 sand and between 850 and 1 100 kg / m 3 of gravel, preferably gravel 2/8. Even more preferably, it is a combination of 788 kg / m 3 of washed sand 0/4 and 928 kg / m 3 of gravel 2/8.
  • conventional or common cement is understood in the present invention as that cement with a low alkali content that has a low chemical vulnerability and a high compressive strength.
  • CEM I 52.5R / SR cement which is a high-strength 52.5 MPa Portland Type I cement at 28 days with high initial resistance R and sulfate / SR resistant.
  • the conventional cement used in the present invention is a Portland cement, even more preferably a CEM I 52.5R / SR category Portland cement. More preferably the composition of the invention contains between 400 and 600 kg / m 3 of Portland cement CEM I 52.5R / SR. Even more preferably, the composition of the invention contains 500 kg / m 3 of Portland cement CEM I 52.5R / SR.
  • Fly ash comes from the combustion residues of pulverized coal, for example, from thermal power plants producing electricity. In a preferred embodiment, the composition of the invention contains between 75 and 125 kg / m 3 of fly ash. More preferably, the composition of the invention contains 100 kg / m 3 of fly ash.
  • the limestone filler of the invention has a particle size that complies with article 28.4.1 of instruction EHE-08 and that corresponds to a 90% effective separation in a 0.063 sieve.
  • the composition of the invention contains between 20 and 50 kg / m 3 of limestone filler. More preferably, the composition of the invention contains 30 kg / m 3 of limestone filler.
  • Silica smoke is composed in the present invention of microscopic particles of reactive silica, of approximately 0.1 microns, are spherical particles caused by the reduction of quartz with coal in blast furnaces.
  • the composition of the invention contains between 45 and 75 kg / m 3 of silica smoke. More preferably, the composition of the invention contains 55 kg / m 3 of silica smoke.
  • ground metacaolin is used, preferably it is a dehydroxylated aluminosilicate.
  • the composition of the invention contains between 45 and 75 kg / m 3 of metacaolin. More preferably, the composition of the invention contains 55 kg / m 3 of metacaolin.
  • active dispersing agent is understood as that additive capable of strongly reducing the water content of a given composition without modifying the consistency.
  • a concrete superplasticizer is used that is capable of giving the fresh concrete a better performance in terms of workability and pumpability.
  • This superplasticizer can be of the type lignosulfonates, naphthalene sulfonates, melamine sulfonates or polycarboxylates.
  • the composition of the present invention preferably contains between 12 and 18 kg / m 3 of superplasticizer and more preferably between 12 and 15 kg / m 3 .
  • the polypropylene fibers of the composition of the invention are multifilaments of lengths less than 20 mm, more preferably 12 mm.
  • the composition of the invention contains between 0.2 and 1 kg / m 3 of polypropylene fibers. More preferably, the composition of the invention contains 0.6 kg / m 3 of polypropylene fibers.
  • the composition further comprises at least one setting retarder in a proportion less than or equal to 10 kg / m 3 .
  • the composition of the invention contains between 2 and 8 kg / m 3 of setting retarder, more preferably it contains 5 kg / m 3 of setting retarder.
  • the present invention relates to a method of obtaining the composition of the invention described above, at temperatures between 10 and 35 ° C comprising the following steps: a) measure the moisture of the aggregate and adjust the amount of water and aggregate with respect to the final composition;
  • step c) add, in the order described, polypropylene fibers, conventional cement, silica smoke, fly ash and metacaolin over the mixture obtained in step c),
  • the moisture of the aggregate Before proceeding with the preparation of the composition of the invention, for its use as concrete the moisture of the aggregate must be measured previously, that is, the humidity of the washed sand and the gravel that form it, in order to, in case of if necessary, adjust or correct the dosage of the final composition by redosing the sand, gravel and water in the mixture. If these had moisture, the excess of it must be deducted from the total amount of water necessary to obtain the composition and, in turn, replace it with more washed sand and gravel in the same amount, until the amount of water is obtained, Washed sand and gravel mentioned corresponding to the final composition.
  • the humidity of the aggregate is corrected by determining its moisture content, for example by burning aggregates or scales hygrometric of a previous sample. Subsequently, the dosage of the amount of water, sand and gravel is adjusted or readjusted. This adjustment or readjustment of the dosage consists in deducting from the dosage water added in steps (c) and (f), the amount measured in determining the degree of moisture in the aggregate. That same amount, by weight, will be added to the corresponding aggregate that is added in step (b).
  • the kneading device of step b) is selected from the list comprising a planetary mixer with vertical axis or concrete mixer, concrete mixer truck or concrete plant.
  • a third aspect of the invention relates to the use of the composition described above as structural concrete due to its high strength and self-compacting properties.
  • the concrete of the invention is used as structural concrete in prestressed and post-tensioned structures, bridges, tunnels, foundations, buildings, nuclear reactors, accumulators, warehouses and storage tanks.
  • the composition of the invention is used as the structural concrete of a storage tank of a pressurized fluid.
  • the last aspect of the invention relates to a thermal storage tank of a pressurized fluid, either liquid or gas, comprising an external layer of post-tensioned concrete and an internal layer of refractory concrete with a characteristic resistance greater than 10 MPa acting as a thermal barrier between the fluid and the post-tensioned concrete, characterized in that the external layer of post-tensioned concrete is manufactured with the high-strength and self-compacting concrete composition described above.
  • Figure 1 Vertical section and side view of the accumulator tank of example 2.
  • Figure 2 90 ° cross section made to the accumulator tank of example 2.
  • the invention will now be illustrated by tests carried out by the inventors, which shows the self-compactability and compressive strength of more than 100 MPa at a 28-day age of the concrete of the invention.
  • Example 1 Composition and method of obtaining a self-compacting concrete with a compressive strength greater than 100 MPa at an age of 28 days.
  • a concrete was prepared whose composition is that indicated in Table 1 according to the procedure for obtaining detailed below.
  • Segregation resistance test according to ASTM C 161 1 These tests allow verifying and certifying whether the concrete is self-compacting, in addition to checking the homogeneity of the concrete from segregation.
  • Table 2 Shows the results of the runoff, V-funnel, L-box and J-ring tests and the results of compressive strength at the ages of 7 and 28 days performed for the concrete example of the invention with different proportions of additives superplasticizer and setting retarder. Self-compactability is considered when ensuring compliance with the parameters set out in Table 3:
  • Table 3 Permissible ranges to consider the self-compactability of a concrete according to runoff tests, V funnel, L-box and J ring.
  • the compressive strengths have been determined, mainly at the ages of 7 and 28 days.
  • the results are shown in Table 4, those kneaded that meet the requirements of Table 3 as well as compressive strengths greater than 100 MPa being acceptable.
  • the kneaded ones are listed from 1 to 19 because they were prepared on different days; a humidity adjustment was made every day.
  • Table 4 Shows the results of the runoff and J-ring tests and the results of compressive strength at the ages of 7 and 28 days performed for the concrete example of the invention.
  • Example 2 Use of the composition of the invention as structural concrete of a thermal storage tank of a pressurized fluid.
  • composition of the invention of the previous example can be used as structural concrete for the manufacture of a thermal storage tank, and as a preferred embodiment example for a tank such as that described in the Spanish patent application with application number P201200796, dated of application 6 August 2012, is a cylindrical steam accumulator tank that is formed by two layers, an outer layer of post-tensioned concrete and an inner layer of refractory concrete.
  • Figure 1 shows the vertical section of a steam accumulator comprising the concrete composition of the invention.
  • This cylindrical shape has two semi-ellipsoids at its ends, the semi-ellipsoidal body of post-tensioned concrete composed of the composition of the invention, in particular the composition of the previous example, (3) and the semi-ellipsoidal body of a refractory concrete (4), so that it allows a better distribution of the tensions generated by the pressure and the temperature inside the accumulator as well as minimizing the loss of useful volume with respect to the spherical cap.
  • Figure 2 shows the 90 ° cross-section made to the concrete accumulator where the post-tensioned concrete base composed of the composition of the invention, in particular the composition of the previous example (5), can be seen.
  • the use of the post-tensioned concrete of the invention with high compression resistance allows to achieve the necessary vacuum compression state, that is, without pressure or temperature taking into account that the forces acting on the inner wall produce expansions and tractions in the layer internal composed of a refractory concrete.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

la présente invention se rapporte à la composition d'un béton autocompactant présentant une haute résistance à la compression. Ce béton atteint des résistances à la compression supérieures à 100 MPa à 28 jours, en conservant sa propriété autocompactante. La présente invention concerne en outre un procédé d'obtention du béton autocompactant à haute résistance, et l'utilisation de celui-ci comme béton de structure pour des structures telles que des structures précontraintes par pré-tension et par post-tension, des ponts, des tunnels, des fondations, des bâtiments, des réacteurs nucléaires, des accumulateurs, des dépôts et des cuves de stockage.
PCT/ES2014/070775 2013-10-14 2014-10-13 Béton autocompactant à haute résistance et son procédé d'obtention WO2015055878A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201331509 2013-10-14
ES201331509A ES2535782B1 (es) 2013-10-14 2013-10-14 Hormigón autocompactable de alta resistencia y su procedimiento de obtención

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WO2015055878A1 true WO2015055878A1 (fr) 2015-04-23

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106431147A (zh) * 2016-10-12 2017-02-22 中建三局集团有限公司 微环箍约束增强混凝土
CN106431039A (zh) * 2016-09-13 2017-02-22 清华大学 一种增强混凝土抗盐渍土侵蚀能力的复合掺合料
RU2632795C1 (ru) * 2016-05-04 2017-10-09 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский государственный архитектурно-строительный университет" КГАСУ Самоуплотняющаяся бетонная смесь
CN109650810A (zh) * 2019-01-07 2019-04-19 川铁国际经济技术合作有限公司 一种自密实高性能混凝土及其制备方法
CN110563407A (zh) * 2019-09-30 2019-12-13 中建西部建设新疆有限公司 一种绿色环保型桥梁盖梁用高强自密实清水混凝土及其制备工艺
US12037286B2 (en) 2022-01-07 2024-07-16 Universite Laval High-strength concrete and method of producing same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114436580A (zh) * 2020-10-30 2022-05-06 贵州成智重工科技有限公司 一种绿色机制集料普通超高性能砼
CN113636794A (zh) * 2021-08-16 2021-11-12 贵州工程应用技术学院 一种大掺量粉煤灰混凝土及其制备方法
CN114349432B (zh) * 2022-01-21 2023-02-07 中建西部建设新疆有限公司 一种混杂纤维增强自密实高强混凝土及其制备方法

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EP2543648A1 (fr) * 2010-03-01 2013-01-09 Denki Kagaku Kogyo Kabushiki Kaisha Composé ferro-aluminate de calcium, adjuvant de ciment et son procédé de fabrication, et composition de ciment
WO2013072454A1 (fr) * 2011-11-18 2013-05-23 Commissariat à l'énergie atomique et aux énergies alternatives Mortier auto-plaçant, son procédé de préparation et ses utilisations

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GB2425532A (en) * 2005-04-27 2006-11-01 Univ Sheffield Concrete compositions containing glass powder with a particle size between 1mm and less than 35 microns
EP2543648A1 (fr) * 2010-03-01 2013-01-09 Denki Kagaku Kogyo Kabushiki Kaisha Composé ferro-aluminate de calcium, adjuvant de ciment et son procédé de fabrication, et composition de ciment
WO2013072454A1 (fr) * 2011-11-18 2013-05-23 Commissariat à l'énergie atomique et aux énergies alternatives Mortier auto-plaçant, son procédé de préparation et ses utilisations

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GÜNEYESI ET AL.: "PErmetaion Properties of Self-Consolidating Concretes with Mineral Admixtures.", ACI MATERIALS JOURNAL, March 2011 (2011-03-01), pages 150 A 158 *
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2632795C1 (ru) * 2016-05-04 2017-10-09 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский государственный архитектурно-строительный университет" КГАСУ Самоуплотняющаяся бетонная смесь
CN106431039A (zh) * 2016-09-13 2017-02-22 清华大学 一种增强混凝土抗盐渍土侵蚀能力的复合掺合料
CN106431147A (zh) * 2016-10-12 2017-02-22 中建三局集团有限公司 微环箍约束增强混凝土
CN109650810A (zh) * 2019-01-07 2019-04-19 川铁国际经济技术合作有限公司 一种自密实高性能混凝土及其制备方法
CN109650810B (zh) * 2019-01-07 2021-05-18 川铁国际经济技术合作有限公司 一种自密实高性能混凝土及其制备方法
CN110563407A (zh) * 2019-09-30 2019-12-13 中建西部建设新疆有限公司 一种绿色环保型桥梁盖梁用高强自密实清水混凝土及其制备工艺
US12037286B2 (en) 2022-01-07 2024-07-16 Universite Laval High-strength concrete and method of producing same

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ES2535782B1 (es) 2016-02-16
ES2535782A1 (es) 2015-05-14

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