WO2017082747A1 - Béton à hautes performances préparé sans agrégats naturels et sa préparation - Google Patents

Béton à hautes performances préparé sans agrégats naturels et sa préparation Download PDF

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Publication number
WO2017082747A1
WO2017082747A1 PCT/PT2016/000014 PT2016000014W WO2017082747A1 WO 2017082747 A1 WO2017082747 A1 WO 2017082747A1 PT 2016000014 W PT2016000014 W PT 2016000014W WO 2017082747 A1 WO2017082747 A1 WO 2017082747A1
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WO
WIPO (PCT)
Prior art keywords
aggregates
concretes
recycled
concrete
minutes
Prior art date
Application number
PCT/PT2016/000014
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English (en)
Inventor
Diogo André GOMES PEDRO
Jorge Manuel CALIÇO LOPES DE BRITO
Luís Manuel FARIA DA ROCHA EVANGELISTA
Original Assignee
Instituto Superior Técnico
Instituto Superior De Engenharia De Lisboa
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.)
Filing date
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Application filed by Instituto Superior Técnico, Instituto Superior De Engenharia De Lisboa filed Critical Instituto Superior Técnico
Publication of WO2017082747A1 publication Critical patent/WO2017082747A1/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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/16—Waste materials; Refuse from building or ceramic industry
    • C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same materials
    • 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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/02—Agglomerated materials, e.g. artificial aggregates
    • 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
    • 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 belongs to the technical field of construction products.
  • the invention refers to high- performance concretes produced without any natural aggregates and with possible application in situations where special characteristics are required.
  • High-performance concretes are characterized by having better mechanical properties, higher workability and better resistance to chemical attacks compared to those of conventional concretes.
  • the term "high-performance” is based on the quantification of some of the properties in accordance with the literature. In this context, there are in the literature requirements of 76-124 MPa and of 33-44 GPa, respectively for compressive strength and elastic modulus [1], and the use of slump class S4 in the fresh state is also recommended [2] .
  • the replacement of natural aggregates with recycled aggregates, when performed, has been limited only to low added-value purposes, like non ⁇ structural concrete or road bases.
  • recycled concrete aggregate's (RCA) performance The main cause of this situation is a negative perception of recycled concrete aggregate's (RCA) performance.
  • recycled aggregates in concrete are, in principle, of lower quality than that of natural aggregates. This is due to the presence of adhered mortar in the recycled aggregates, which is responsible for decreasing the density
  • the present invention intends to fully incorporate recycled aggregates, without prior treatment, in high-performance concrete. Although it has been commonly used in non-structural concrete, the truth is that concrete structures in many countries, including Portugal, continue to be produced with natural aggregates only. The high variability of recycled aggregates, caused by the presence of varying amounts of adhered mortar, has contributed to this reality.
  • the present invention refers to a new type of high- performance concretes in which the natural fraction is totally replaced with recycled aggregates, not subjected to any previous treatment.
  • this component in its composition there is cement and fly ash that form a binder, and superplasticizers characterized by being water reducers, which allow the increase of plasticity of the paste by increasing the workability of concrete, or a reduction of the amount of water maintaining the workability, and preferably exhibit a chemical basis resulting of the combination of modified polycarboxylates.
  • the concretes may also contain silica fume. These concretes have an excellent performance and are suitable for situations requiring special needs like strength and durability. They can be applied in buildings, bridges, precast elements, among many other applications.
  • the concretes object of this invention that is intended to be protected are innovative within the technical field since, in its composition, recycled aggregates are used instead of natural aggregates.
  • the recycled aggregates used must be subjected to a crushing process identical to that of the natural aggregates and should not be subjected to any previous treatment.
  • the maximum size of these aggregates corresponding to the smallest mesh opening of the NP EN 12620 sieve, through which an amount of aggregates superior or equal to 90% passes, should be of 16 mm and its water absorption values must be between 3.5% and 6.5%.
  • the aggregates In terms of dry density the aggregates must have values between 2300 kg/m 3 and 2600 kg/m 3 .
  • concretes Compared to the total mass of the mix, concretes have the following constituents:
  • the preparation process of the proposed invention comprises the following steps: switch on a vertical-shaft cement mixer; place 4-16 mm recycled aggregate particles with or without addition of silica fume and 75% of the total water; wait for two minutes and thirty seconds and insert the recycled aggregates with a particle size of 0-4 mm; wait again two minutes and thirty seconds and insert the cement, fly ash and the remaining 25% of the total water mixed with the superplasticizer; wait five minutes to achieve a homogenized mix, and stop the cement mixer for three minutes; switch on the cement mixer again for a period of three minutes and remove the resulting concrete.
  • these concretes have a compressive strength within class C70/85, suitable for the described applications.
  • NP EN 206-1 [13] for a concrete to be classified as high-strength it must correspond to strength classes higher than C50/60.
  • the above norms do not include the designation of high- performance, whose concept includes features beyond those mechanical-related .
  • Fresh concrete has a good workability, with slump values between 160 and 210 mm, complying with the existing recommendations for their application in construction sites [2] .
  • the concretes have an excellent performance, particularly in terms of the carbonation depths and the chloride diffusion coefficients, respectively at 91 days, close to 0 mm and 4xl0 ⁇ 12 m 2 /s.
  • the new product presented has conditions to boost the recycling and construction materials markets.
  • Example 1 Preparation of 1 m 3 of high-performance concrete made with no natural aggregates, according to the invention, with addition of silica fume
  • Example 2 Preparation of 1 m 3 of high-performance concrete made with no natural aggregates, according to the invention, without addition of silica fume
  • Patent CN103588404 (B) . Lijing, W., Jianyong, L., Xueying, M., Baiyu, S., Donghui, C. Method for processing recycled aggregate and method for preparing high performance concrete using same, 2015.
  • Patent CN 102786243 (B) . Xing, F . , Kou, S. Modified recycled aggregate and recycled aggregate high-performance concrete, 2014.
  • Patent CN 102898086 (B) . Longquan, J., Quantang, L., Liangshu, Q., Yuansheng, J. Preparation method of high- performance recycled aggregate concrete, 2015.

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

Abstract

La présente invention concerne un béton à hautes performances préparé sans incorporation d'agrégats naturels. Le terme « hautes performances » est basé sur la quantification de certaines des propriétés conformément à l'étude bibliographique. Dans ce contexte, selon la littérature, des paramètres de 76 à 124 MPa et de 33 à 44 GPa sont nécessaires, respectivement pour la résistance à la compression et le module d'élasticité, et l'utilisation d'une classe d'affaissement S4 à l'état frais est également recommandée. Ces bétons sont produits avec du ciment Portland et des cendres volantes (liant), des agrégats de béton recyclé (RCA), des superplastifiants et éventuellement de la fumée de silice. L'invention est présentée en tant que nouveau produit dans le marché des matériaux de construction recyclés, offrant une solution pour la gestion des déchets et la raréfaction des ressources naturelles. Avec l'augmentation de l'utilisation de béton à hautes performances, la substitution de tous les agrégats naturels par des agrégats recyclés est fondamentale pour la réduction de tous les impacts environnementaux associés.
PCT/PT2016/000014 2015-11-13 2016-11-14 Béton à hautes performances préparé sans agrégats naturels et sa préparation WO2017082747A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PTPT108957 2015-11-13
PT108957A PT108957B (pt) 2015-11-13 2015-11-13 Betões de elevado desempenho sem incorporação de agregados naturais e o seu processo de preparação.

Publications (1)

Publication Number Publication Date
WO2017082747A1 true WO2017082747A1 (fr) 2017-05-18

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CN109020390A (zh) * 2018-09-04 2018-12-18 上海建工集团股份有限公司 一种低坍落度损失的100%取代率再生骨料混凝土
CN109665772A (zh) * 2018-12-17 2019-04-23 南京工程学院 一种掺再生混凝土砌块砖骨料的透水混凝土及其制备方法
CN109928684A (zh) * 2019-04-11 2019-06-25 咸阳天力商品混凝土有限公司 混凝土及其制备工艺
WO2020249141A1 (fr) * 2019-06-14 2020-12-17 ERC-TECH a.s. Procédé de préparation de béton frais et béton frais obtenu par ce procédé
WO2020249145A1 (fr) * 2019-06-14 2020-12-17 ERC-TECH a.s. Mélange sec pour la préparation de béton, béton frais et procédé de préparation de béton frais
US20210002174A1 (en) * 2017-12-27 2021-01-07 Walter Aurelio MORI PEREZ Method for obtaining recycled aggregates, materials and products for construction by the recycling of construction and demolition waste
WO2021047696A1 (fr) * 2019-09-13 2021-03-18 ERC-TECH a.s. Mélange sec pour la préparation de béton, béton frais et procédé pour la préparation de béton frais
CN113075100A (zh) * 2021-02-26 2021-07-06 重庆交通大学 基于碱骨料反应的再生骨料评估及强化方法
CN113087465A (zh) * 2021-03-31 2021-07-09 湖北工业大学 全组分利用建筑垃圾制备绿色超高性能混凝土的方法
CN114685103A (zh) * 2022-03-31 2022-07-01 云浮市建设工程质量检测站 一种掺杂改性制得的高性能混凝土及其制备方法
EP4282843A1 (fr) * 2022-05-26 2023-11-29 Red-Beton s.r.o. Procédé de préparation d'un matériau composite lié à un liant hydraulique et matériau composite frais lié à un liant hydraulique et contenant un agrégat recyclé

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CN112777970A (zh) * 2021-01-11 2021-05-11 佛山格耐特新型建筑材料科技有限公司 一种用于路面砖的再生骨料混凝土材料及其制备方法

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210002174A1 (en) * 2017-12-27 2021-01-07 Walter Aurelio MORI PEREZ Method for obtaining recycled aggregates, materials and products for construction by the recycling of construction and demolition waste
CN109020390A (zh) * 2018-09-04 2018-12-18 上海建工集团股份有限公司 一种低坍落度损失的100%取代率再生骨料混凝土
CN109665772A (zh) * 2018-12-17 2019-04-23 南京工程学院 一种掺再生混凝土砌块砖骨料的透水混凝土及其制备方法
CN109928684A (zh) * 2019-04-11 2019-06-25 咸阳天力商品混凝土有限公司 混凝土及其制备工艺
WO2020249141A1 (fr) * 2019-06-14 2020-12-17 ERC-TECH a.s. Procédé de préparation de béton frais et béton frais obtenu par ce procédé
WO2020249145A1 (fr) * 2019-06-14 2020-12-17 ERC-TECH a.s. Mélange sec pour la préparation de béton, béton frais et procédé de préparation de béton frais
WO2021047696A1 (fr) * 2019-09-13 2021-03-18 ERC-TECH a.s. Mélange sec pour la préparation de béton, béton frais et procédé pour la préparation de béton frais
CN113075100A (zh) * 2021-02-26 2021-07-06 重庆交通大学 基于碱骨料反应的再生骨料评估及强化方法
CN113075100B (zh) * 2021-02-26 2022-08-26 重庆交通大学 基于碱骨料反应的再生骨料评估及强化方法
CN113087465A (zh) * 2021-03-31 2021-07-09 湖北工业大学 全组分利用建筑垃圾制备绿色超高性能混凝土的方法
CN113087465B (zh) * 2021-03-31 2023-03-10 湖北工业大学 全组分利用建筑垃圾制备绿色超高性能混凝土的方法
CN114685103A (zh) * 2022-03-31 2022-07-01 云浮市建设工程质量检测站 一种掺杂改性制得的高性能混凝土及其制备方法
CN114685103B (zh) * 2022-03-31 2022-11-11 云浮市建设工程质量检测站 一种掺杂改性制得的高性能混凝土及其制备方法
EP4282843A1 (fr) * 2022-05-26 2023-11-29 Red-Beton s.r.o. Procédé de préparation d'un matériau composite lié à un liant hydraulique et matériau composite frais lié à un liant hydraulique et contenant un agrégat recyclé

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