WO2017203446A1 - Procédé de confection manuelle de béton par suspension mécanique - Google Patents

Procédé de confection manuelle de béton par suspension mécanique Download PDF

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Publication number
WO2017203446A1
WO2017203446A1 PCT/IB2017/053062 IB2017053062W WO2017203446A1 WO 2017203446 A1 WO2017203446 A1 WO 2017203446A1 IB 2017053062 W IB2017053062 W IB 2017053062W WO 2017203446 A1 WO2017203446 A1 WO 2017203446A1
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WO
WIPO (PCT)
Prior art keywords
mixture
concrete
cement
mortar
until
Prior art date
Application number
PCT/IB2017/053062
Other languages
English (en)
Spanish (es)
Inventor
Carlos Mauricio BEDOYA MONTOYA
Original Assignee
Universidad Nacional De Colombia
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
Publication date
Application filed by Universidad Nacional De Colombia filed Critical Universidad Nacional De Colombia
Publication of WO2017203446A1 publication Critical patent/WO2017203446A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/48—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected by vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/02—Controlling the operation of the mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • 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
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability

Definitions

  • the present invention relates to concrete mixtures, mortar mixtures and the process for obtaining them, specifying the order and times in which each mixing component must be added, and the resulting product.
  • MCV Conventional concrete mixtures consists of three essential elements: cement, water, and aggregates that can be thin and / or thick.
  • MCV process MVC preparation process
  • a substantially homogeneous mixture is understood as a mixture that in essence or in a portion greater than 50% of its composition comprises a single phase.
  • the MCV After the MCV is performed, it is arranged in molds that describe a volume that depends on the user's requirements. After depositing the MCV in molds, it enters a process that is called hardened, in which for 28 days it must gradually reach properties and values of compressive strength that are between the ranges of 21 to 25MPa according to the NTC 550 standards of the Icontec, equivalent to ASTM C31.
  • the patent document GB 1053958 A is identified which discloses a method of making mixtures of mortars and concrete, for improve mechanical resistance to compression. Conventional materials are used in this method: water, cement and fine and coarse aggregates.
  • the present invention corresponds to a process for the preparation of concrete and mortar mixtures, in a mixing process with mechanical suspension (hereinafter the MSM process).
  • the MSM process comprises the stages of:
  • step (b) c- add a coarse aggregate to the mortar mixture obtained in step (b), and stir until a concrete mixture with a substantially homogeneous composition is achieved.
  • the invention also comprises the products obtained with the MSM process.
  • the products are an activated paste, a mortar mixture and a concrete mixture.
  • the activated paste comprises water and a cement.
  • the cement and water are stirred and mixed until a substantially homogeneous composition is achieved.
  • the mortar mixture comprises an activated paste and a fine aggregate.
  • the activated pass and the fine aggregate are stirred and mixed until a substantially homogeneous composition is achieved in the plastic state.
  • the concrete mixture comprises a mortar mixture and a coarse aggregate.
  • the mortar mixture and coarse aggregate are stirred and mixed until a substantially homogeneous composition is achieved.
  • FIG. 1 shows a 1000X electronic scanning microscopy performed on the MCV sample prepared using a ⁇ V1CV process. In the figure you can see the porosity areas.
  • the FiG. 2 shows a 1000X electronic scanning microscopy performed on the MSM sample made using an MSM process. In the figure you can see the porosity areas. Detailed description of the invention
  • the present invention corresponds to a process for the preparation of concrete and mortar mixtures, in a mixing process with mechanical suspension (hereinafter the MSM process).
  • the invention also comprises Sos products obtained with the MSM process.
  • the MSM process comprises the following stages:
  • step (a) c- add a coarse aggregate to the mortar mixture obtained in step (b), and stir until a concrete mixture with a substantially homogeneous composition is achieved.
  • step (a) stirring is performed manually. For this, water and cement are placed in a tank, where they are agitated.
  • Step (a) is carried out until a homogeneous substantial composition is obtained, which is called activated pulp. To achieve activated pulp, stirring is carried out in a time T1, where 0 ⁇ T1 ⁇ 2 min.
  • step (b) the activated paste of step (a) and the fine aggregate are mixed and stirred until a substantially homogeneous composition is achieved in a plastic state, which is called mortar mixture.
  • stirring is carried out in a time T2, where 0 ⁇ T2 ⁇ 4 min.
  • stage (c) the mortar mixture from stage (b) and the coarse aggregate are mixed and stirred until a substantially homogeneous composition is achieved, which is called concrete mixing.
  • stirring is carried out in a time T3, where 0 ⁇ T3 ⁇ 4 min.
  • cementing will be understood as compounds that bind fragments of one or more substances and give permanent cohesion to such a set.
  • the union occurs through chemical transformations, which arise from the contact of the cement with water. Therefore, the cementing agent is selected from the group consisting of Portland type I cements (known in Colombia as general purpose cement), Portland type II, Portland type III, Portland type IV, lime, gypsum, ashes, binders and combinations of previous.
  • the plastic state will be understood as the phase where the concrete or mortar mixture acquires properties that allow it, despite its low fluidity, to adequately fill forms or deposits according to the user's requirements.
  • the ratio of the materials for the mixture of water, cement and aggregates (fine aggregate and coarse aggregate) is established by the user according to the requested mixing requirements.
  • the ratio of materials for the mixture of water, cement and aggregates is between 1: 2: 2.5 and 1: 2: 3 respectively.
  • Example 1 A cubic meter of concrete has been developed using the MSM process. The elements used are:
  • voids With respect to the percentage values of voids, it is a condition that falls on the structural properties. A mixture that obtains in its hardening process low percentages of voids, indicates that it has in its structure less porosity. This means that there is a greater number of cohesion channels between fine and coarse aggregates, which allows for higher load transfer capabilities (it has greater compressive strength).
  • the MSM 1 and MSM 2 samples have lower absorption and lower pore volume compared to the MCV 1 and MCV 2 samples. That is, the MSM 1 and MSM 2 samples have higher performance values in terms of durability. concrete to atmospheric agents as dissolved CO 2 in air. CO 2 is the cause of carbonation, a pathology that rapidly degrades the life of the reinforced concrete structures.
  • the "Bla ⁇ ne” property is a property of the cementing agent, which indicates the coating capacity in square centimeters per gram (cm 2 / g), which is measured by optimizing the consumption of the cementing agent and guaranteeing a mixture of greater cohesion for the fine aggregates and thick.
  • the "Bla ⁇ ne” Sa property test can be performed by scanning electron microscopy (SEM) tests. By scanning electron microscopy, areas of porosity and lack of "Bla ⁇ ne” coating are identified.
  • SEM scanning electron microscopy
  • the scanning microscopy of the MCV sample performed at 10.00X shows regions with porosity and lack of "Blaine” which are delimited with black ovals that enclose numbers (1), (2) and (3).

Landscapes

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

Abstract

La présente invention concerne un procédé pour la préparation de mélanges de béton et de mélanges de mortier. Le procédé comprend les étapes consistant à : a) mélanger et agiter un agent de cimentation avec de l'eau jusqu'à obtenir une pâte activée; b) additionner un agrégat fin à la pâte activée de l'étape (a) et agiter jusqu'à obtenir un mélange de mortier; et, c) additionner un agrégat grossier au mélange obtenu de l'étape (b), et agiter jusqu'à obtenir un mélange de béton. En outre, la présente invention concerne une pâte activée, un mélange de mortier et un mélange de béton.
PCT/IB2017/053062 2016-05-25 2017-05-24 Procédé de confection manuelle de béton par suspension mécanique WO2017203446A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CO16136903 2016-05-25
CO16-136903 2016-05-25

Publications (1)

Publication Number Publication Date
WO2017203446A1 true WO2017203446A1 (fr) 2017-11-30

Family

ID=60412804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2017/053062 WO2017203446A1 (fr) 2016-05-25 2017-05-24 Procédé de confection manuelle de béton par suspension mécanique

Country Status (1)

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WO (1) WO2017203446A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986620A (en) * 1960-07-26 1965-03-17 Takabayashi Toshiaki Improvement in production method for cement mortar or concrete
CN1396048A (zh) * 2002-03-29 2003-02-12 许虎贤 快速制浆法多步混凝土搅拌工艺
CN101028727A (zh) * 2007-04-10 2007-09-05 长安大学 水泥混凝土单速二次搅拌工艺
CA2619370A1 (fr) * 2007-01-30 2008-07-30 Construction Research & Technology Gmbh Trousse et methode de preparation d'une composition cimentaire durcissable
DE102007027080B4 (de) * 2007-06-12 2011-06-30 Lörke, Paul, Dr., 51109 Verfahren zum Herstellen von Betonmischungen
AU2015200172A1 (en) * 2011-11-11 2015-02-05 Romeo Ilarian Ciuperca Concrete mix composition, mortar mix composition and method of making and curing concrete or mortar and concrete or mortar objects and structures
US20150202794A1 (en) * 2012-07-18 2015-07-23 Aizawa Concrete Corporation Producing method of concrete

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB986620A (en) * 1960-07-26 1965-03-17 Takabayashi Toshiaki Improvement in production method for cement mortar or concrete
CN1396048A (zh) * 2002-03-29 2003-02-12 许虎贤 快速制浆法多步混凝土搅拌工艺
CA2619370A1 (fr) * 2007-01-30 2008-07-30 Construction Research & Technology Gmbh Trousse et methode de preparation d'une composition cimentaire durcissable
CN101028727A (zh) * 2007-04-10 2007-09-05 长安大学 水泥混凝土单速二次搅拌工艺
DE102007027080B4 (de) * 2007-06-12 2011-06-30 Lörke, Paul, Dr., 51109 Verfahren zum Herstellen von Betonmischungen
AU2015200172A1 (en) * 2011-11-11 2015-02-05 Romeo Ilarian Ciuperca Concrete mix composition, mortar mix composition and method of making and curing concrete or mortar and concrete or mortar objects and structures
US20150202794A1 (en) * 2012-07-18 2015-07-23 Aizawa Concrete Corporation Producing method of concrete

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Concrete A Material for The New Stone Age. Module", MATERIAL SCIENCE AND TECHNOLOGY DEPARTMENT OF MATERIALS SCIENCE AND ENGINEERING, 1995, Retrieved from the Internet <URL:http://matse1.matse.illinois.edu/concrete/bm.> *

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