WO2011103754A1 - Hollow concrete component and method for preparing the same - Google Patents

Hollow concrete component and method for preparing the same Download PDF

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Publication number
WO2011103754A1
WO2011103754A1 PCT/CN2010/078575 CN2010078575W WO2011103754A1 WO 2011103754 A1 WO2011103754 A1 WO 2011103754A1 CN 2010078575 W CN2010078575 W CN 2010078575W WO 2011103754 A1 WO2011103754 A1 WO 2011103754A1
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Prior art keywords
concrete
hollow
columnar
carbon dioxide
concrete member
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PCT/CN2010/078575
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French (fr)
Chinese (zh)
Inventor
查晓雄
刘轶翔
于福涛
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哈尔滨工业大学深圳研究生院
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Publication of WO2011103754A1 publication Critical patent/WO2011103754A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/02—Methods or machines specially adapted for the production of tubular articles by casting into moulds
    • B28B21/10—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means
    • B28B21/22—Methods or machines specially adapted for the production of tubular articles by casting into moulds using compacting means using rotatable mould or core parts
    • B28B21/30—Centrifugal moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/44—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for treating with gases or degassing, e.g. for de-aerating
    • 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
    • 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
    • C04B40/02—Selection of the hardening environment
    • C04B40/0231—Carbon dioxide hardening

Definitions

  • dry ice is placed in the columnar hollow, and carbon dioxide formed after sublimation of the dry ice reacts with the concrete.
  • the technical solution of the present invention is: Providing a method for preparing a hollow concrete member, comprising the following steps:
  • Preparing concrete mixing concrete aggregate, cement and water in a certain proportion to form concrete; concrete forming columnar hollow: the concrete is poured into the columnar base to form a columnar hollow attached to the inner wall of the columnar base;
  • the concrete in the columnar substrate is centrifugally rotated to form a columnar hollow.
  • the technical effect of the invention is:
  • the hollow concrete member of the invention reacts concrete with carbon dioxide to form a hollow concrete member, and carbon dioxide reacts with calcium hydroxide of the hydration product of the cement to form calcium carbonate, and the calcium carbonate can improve the concrete aggregate and the cement slurry.
  • the contact interface enhances the strength of the concrete and reduces the porosity of the concrete, thereby improving the durability of the concrete.

Abstract

A hollow concrete component and the method for preparing the same are provided. The component comprises concrete (2), a columned base (1) containing the concrete (2) and a columned hollow core (3) formed after the molding of the concrete (2). The preparation method comprises the following steps: a. agitating and mixing concrete aggregate, cement and water to form the concrete (2) based on a certain ratio, b. pouring the concrete (2) which is glued to the internal wall of the columned base (1) into the columned base (1) to form a hollow core (3) by centrifugal rotation, and c. making the concrete (2) to react with carbon dioxide to form the hollow concrete component after the concrete (2) is molded in the columned base (1).

Description

空心混凝土构件及制备方法 技术领域  Hollow concrete member and preparation method
本发明涉及一种混凝土构件及制备方法， 尤其涉及一种利用混凝土骨料制 成空心混凝土构件及制备方法。 背景技术  The invention relates to a concrete member and a preparation method thereof, in particular to a hollow concrete member made of concrete aggregate and a preparation method thereof. Background technique
随着社会的发展， 各类建筑物及建筑工程越来越多， 混凝土构件广泛应用 于建筑工程中： 如冶金工业、 电力工业、 造船工业、 机械制造业及工业或民用 建筑等， 可以用于锅炉构件和送变电构架、 装配车间的柱、 单层或多层工业厂 房、 高层或超高层民用建筑及公路和城市拱桥等结构中， 还应用于杆塔结构、 工业厂房与民用建筑的柱和基础桩中。 在建筑工程中， 混凝土构件中混凝土强 度越高， 其支撑作用越好。 在一些特殊应用领域， 要求使用高强度的混凝土构 件， 这样， 通常的混凝土构件是不符合要求的。 发明内容  With the development of society, more and more types of buildings and construction projects, concrete components are widely used in construction projects: such as metallurgical industry, power industry, shipbuilding industry, machinery manufacturing and industrial or civil construction, etc., can be used Boiler components and power transmission and transformation frameworks, columns in assembly workshops, single or multi-storey industrial plants, high-rise or super-high-rise civil buildings, and highways and urban arches, etc., also applied to columns of tower structures, industrial plants and civil buildings. In the foundation pile. In construction, the higher the concrete strength of the concrete members, the better the support. In some special applications, high-strength concrete components are required, so that the usual concrete components are not satisfactory. Summary of the invention
本发明解决的技术问题是： 本发明的空心混凝土构件及制备方法， 克服现 有技术中， 普通混凝土构件的强度不高的技术问题。  The technical problem solved by the present invention is: The hollow concrete member and the preparation method of the present invention overcome the technical problem that the strength of the ordinary concrete member is not high in the prior art.
本发明的技术方案是： 构建一种空心混凝土构件， 包括混凝土骨料、水泥、 水， 将混凝土骨料、 水泥、 水按一定比例搅拌混和形成混凝土， 还包括容纳所 述混凝土的柱状基体， 将所述混凝土灌入所述柱状基体中形成柱状空心贴在所 述柱状基体的内壁， 所述混凝土在所述柱状基体中成形后， 将所述混凝土与二 氧化碳反应后形成空心混凝土构件。  The technical scheme of the present invention is: constructing a hollow concrete member, including concrete aggregate, cement, water, mixing concrete aggregate, cement, water in a certain proportion to form concrete, and further comprising a columnar base body containing the concrete, The concrete is poured into the columnar base to form a columnar hollow attached to the inner wall of the columnar base. After the concrete is formed in the columnar base, the concrete is reacted with carbon dioxide to form a hollow concrete member.
本发明的进一步技术方案是： 所述柱状基体为钢管。  According to a further technical solution of the present invention, the columnar substrate is a steel pipe.
本发明的进一步技术方案是： 所述柱状基体中的混凝土经离心旋转形成柱 状空心。  According to a further technical solution of the present invention, the concrete in the columnar substrate is centrifugally rotated to form a columnar hollow.
本发明的进一步技术方案是：所述二氧化碳置于所述混凝土的柱状空心中， 所述柱状空心密封。  According to a further technical solution of the present invention, the carbon dioxide is placed in a columnar hollow of the concrete, and the columnar hollow seal.
本发明的进一步技术方案是： 所述柱状空心中放入干冰， 所述干冰升华后 生成的二氧化碳与所述混凝土反应。 本发明的技术方案是： 提供一种制备空心混凝土构件的方法， 包括如下步 骤： According to a further technical solution of the present invention, dry ice is placed in the columnar hollow, and carbon dioxide formed after sublimation of the dry ice reacts with the concrete. The technical solution of the present invention is: Providing a method for preparing a hollow concrete member, comprising the following steps:
制备混凝土： 将混凝土骨料、 水泥、 水按一定比例搅拌混和形成混凝土； 混凝土形成柱状空心： 所述混凝土灌入所述柱状基体中形成柱状空心贴在 所述柱状基体的内壁；  Preparing concrete: mixing concrete aggregate, cement and water in a certain proportion to form concrete; concrete forming columnar hollow: the concrete is poured into the columnar base to form a columnar hollow attached to the inner wall of the columnar base;
形成空心混凝土构件： 将所述混凝土与二氧化碳反应。  Forming a hollow concrete member: The concrete is reacted with carbon dioxide.
本发明的进一步技术方案是： 在混凝土形成柱状空心步骤中， 所述柱状基 体中的混凝土经离心旋转形成柱状空心。  According to a further technical solution of the present invention, in the step of forming the columnar hollow of the concrete, the concrete in the columnar substrate is centrifugally rotated to form a columnar hollow.
本发明的进一步技术方案是： 在形成空心混凝土构件步骤中， 所述混凝土 在所述柱状基体中成形后， 还包括在高于常压的蒸汽中养护。  A further technical solution of the present invention is: in the step of forming a hollow concrete member, after the concrete is formed in the columnar substrate, the concrete is further cured in steam higher than normal pressure.
本发明的进一步技术方案是： 在形成空心混凝土构件步骤中， 放入干冰， 所述干冰升华后生成的二氧化碳与所述混凝土反应。  According to a further technical solution of the present invention, in the step of forming the hollow concrete member, dry ice is placed, and the carbon dioxide formed after the sublimation of the dry ice is reacted with the concrete.
本发明的进一步技术方案是： 在所述混凝土的柱状空心中放入干冰使所述 混凝土的柱状空心压力达到临界状态： 所述临界状态为： 压力大于或等于 A further technical solution of the present invention is: placing dry ice in the columnar hollow of the concrete to bring the columnar hollow pressure of the concrete to a critical state: the critical state is: the pressure is greater than or equal to
7. 4mpa,温度大于或等于 31摄氏度，所述干冰在所述临界状态下升华产生超临 界状态的二氧化碳。 7. 4mpa, the temperature is greater than or equal to 31 degrees Celsius, and the dry ice sublimes in the critical state to produce carbon dioxide in a supercritical state.
本发明的技术效果是： 本发明的空心混凝土构件， 将混凝土与二氧化碳反 应后形成空心混凝土构件， 二氧化碳与水泥的水化产物氢氧化钙反应生成碳酸 钙， 碳酸钙可以改善混凝土骨料与水泥浆的接触界面， 增强混凝土的强度， 减 少混凝土的孔隙， 从而提高混凝土的耐久性。  The technical effect of the invention is: The hollow concrete member of the invention reacts concrete with carbon dioxide to form a hollow concrete member, and carbon dioxide reacts with calcium hydroxide of the hydration product of the cement to form calcium carbonate, and the calcium carbonate can improve the concrete aggregate and the cement slurry. The contact interface enhances the strength of the concrete and reduces the porosity of the concrete, thereby improving the durability of the concrete.
附图说明 DRAWINGS
图 1为本发明的结构剖面图。  Figure 1 is a cross-sectional view showing the structure of the present invention.
图 2为本发明的流程图。 具体实施方式  Figure 2 is a flow chart of the present invention. detailed description
下面结合具体实施例， 对本发明技术方案进一步说明。  The technical solutions of the present invention are further described below in conjunction with specific embodiments.
如图 1所示，本发明的具体实施方式是：构建一种空心混凝土构件，包括混 凝土骨料、 水泥、 水， 将混凝土骨料、 水泥、 水按一定比例搅拌混和形成混凝 土 2，还包括容纳所述混凝土的柱状基体 1，将所述混凝土 2灌入所述柱状基体 1中形成柱状空心 3贴在所述柱状基体 1的内壁， 所述混凝土 2在所述柱状基 体 1中成形后， 将所述混凝土 2与二氧化碳反应后形成空心混凝土构件。 本发 明中， 所述混凝土 2在所述柱状基体 1中成形后， 将所述混凝土 2与二氧化碳 反应后形成空心混凝土构件。 由于混凝土 2中含有大量氢氧化钙（化学式为 Ca (OH ) 2)，再将混凝土 2中的氢氧化钙与二氧化碳反应生成碳酸钙， gp : Ca (OH ) 2+C02=CaC03+H20，由于碳酸钙混在混凝土 2中能改善混凝土骨料与水泥桨的接触 界面， 增强混凝土 2的强度， 减少混凝土 2的孔隙， 从而提高混凝土 2的耐久 性， 这样大大提高了空心混凝土构件的性能和质量。 As shown in FIG. 1 , a specific embodiment of the present invention is: constructing a hollow concrete member, including concrete aggregate, cement, water, mixing concrete aggregate, cement, and water in a certain proportion to form a coagulation. The soil 2 further includes a columnar base body 1 for accommodating the concrete, and the concrete 2 is poured into the columnar base body 1 to form a columnar hollow 3 attached to an inner wall of the columnar base body 1, and the concrete 2 is in the columnar base body After forming in 1 , the concrete 2 is reacted with carbon dioxide to form a hollow concrete member. In the present invention, after the concrete 2 is formed in the columnar base 1, the concrete 2 is reacted with carbon dioxide to form a hollow concrete member. Since concrete 2 contains a large amount of calcium hydroxide (chemical formula is Ca(OH) 2 ), calcium hydroxide in concrete 2 is reacted with carbon dioxide to form calcium carbonate, gp : Ca (OH ) 2 + C0 2 = CaC0 3 + H 20 , because calcium carbonate mixed in concrete 2 can improve the contact interface between concrete aggregate and cement paddle, strengthen the strength of concrete 2, reduce the porosity of concrete 2, thereby improving the durability of concrete 2, thus greatly improving the hollow concrete member Performance and quality.
本发明的具体实施例中， 将二氧化碳通入到所述柱状空心 3中， 二氧化碳 通过柱状空心 3壁渗入混凝土 2中， 与混凝土 2中的大量氢氧化钙反应， 根据 水泥使用量， 通入足量的二氧化碳， 使混凝土 2中的氢氧化钙与二氧化碳充分 反应生成碳酸钙。 本发明中， 将二氧化碳通过一定的方法通入到空心混凝土构 件中， 减少了空气中二氧化碳的排放， 改善了环境。 本发明具体实施例中， 所 述所述柱状基体 1为钢管。 在形成柱状空心时， 混凝土 2装入所述柱状基体的 量须根据柱状空心大小的具体要求确定。 将装入混凝土 2的所述柱状基体 1放 到离心机上旋转， 经一定程度的旋转， 所述柱状基体 1中的混凝土 2紧贴所述 柱状基体 1的内壁， 而混凝土柱的中心形成柱状空心 3。  In a specific embodiment of the present invention, carbon dioxide is introduced into the columnar hollow 3, carbon dioxide is infiltrated into the concrete 2 through the columnar hollow 3 wall, and reacts with a large amount of calcium hydroxide in the concrete 2, according to the amount of cement used, The amount of carbon dioxide causes the calcium hydroxide in the concrete 2 to react sufficiently with carbon dioxide to form calcium carbonate. In the present invention, carbon dioxide is introduced into the hollow concrete structure by a certain method, which reduces carbon dioxide emissions in the air and improves the environment. In a specific embodiment of the invention, the columnar substrate 1 is a steel pipe. When the columnar hollow is formed, the amount of the concrete 2 loaded into the columnar substrate is determined according to the specific requirements of the size of the columnar hollow. The columnar substrate 1 loaded with the concrete 2 is placed on a centrifuge and rotated to a certain extent. The concrete 2 in the columnar substrate 1 abuts against the inner wall of the columnar substrate 1, and the center of the concrete column forms a columnar hollow. 3.
如图 1所示，本发明的优选实施方式是： 所述混凝土 2与二氧化碳时，所述 柱状空心 3密封， 这样既可以保证混凝土 2与二氧化碳充分反应， 又不会浪费 二氧化碳。 本发明的具体实施例是： 所述柱状空心 3中放入干冰， 所述干冰升 华后形成高压的二氧化碳， 高压的二氧化碳能使二氧化碳渗入更充分， 二氧化 碳与所述混凝土 2能更充分地反应。  As shown in Fig. 1, a preferred embodiment of the present invention is: When the concrete 2 is made of carbon dioxide, the columnar hollow 3 is sealed, so that the concrete 2 can be sufficiently reacted with carbon dioxide without wasting carbon dioxide. In a specific embodiment of the present invention, dry ice is placed in the columnar hollow 3, and the dry ice is sublimated to form high-pressure carbon dioxide. The high-pressure carbon dioxide can make carbon dioxide infiltrate more fully, and the carbon dioxide can react more fully with the concrete 2.
如图 2所示， 本发明的具体实施方式是： 提供一种制备空心混凝土构件的 方法， 包括如下步骤：  As shown in FIG. 2, a specific embodiment of the present invention is: Provided a method for preparing a hollow concrete member, comprising the following steps:
步骤 100 : 制备混凝土 2 : 本发明中， 将混凝土骨料、 水泥、 水按一定比例 搅拌混和形成混凝土 2， 具体比例根据混凝土的使用要求及混凝土骨料和水泥 的种类进行配比。  Step 100: Preparation of concrete 2: In the present invention, concrete aggregate, cement, and water are mixed and mixed in a certain proportion to form concrete 2, and the specific ratio is matched according to the use requirements of the concrete and the types of concrete aggregate and cement.
步骤 200 : 混凝土形成柱状空心： 先将制备好的混凝土 2灌入所述柱状基 体 1中，混凝土 2装入所述柱状基体的量须根据柱状空心大小的具体要求确定。 再将灌入所述柱状基体中的所述混凝土形成柱状空心贴在所述柱状基体的内 壁。 本发明的具体实施例中， 将装入混凝土 2的所述柱状基体 1放到离心机上 旋转， 经一定程度的旋转， 所述柱状基体 1中的混凝土 2紧贴所述柱状基体 1 的内壁， 而混凝土柱的中心形成柱状空心 3。 Step 200: The concrete forms a columnar hollow: The prepared concrete 2 is first poured into the columnar base 1, and the amount of the concrete 2 loaded into the columnar substrate is determined according to the specific requirements of the size of the columnar hollow. The concrete poured into the columnar matrix is then formed into a columnar hollow attached to the inner wall of the columnar substrate. In a specific embodiment of the present invention, the columnar substrate 1 loaded with the concrete 2 is placed on a centrifuge for rotation, and the concrete 2 in the columnar substrate 1 abuts against the inner wall of the columnar substrate 1 after a certain degree of rotation. The center of the concrete column forms a columnar hollow 3.
步骤 300 : 形成空心混凝土构件： 将所述混凝土与二氧化碳反应， gP : 所 述混凝土 2在所述柱状基体 1中成形后， 将所述混凝土 2与二氧化碳反应后形 成空心混凝土构件。 由于混凝土 2中含有大量氢氧化钙（化学式为 Ca (OH) 2)， 再将混凝土 2与二氧化碳反应生成碳酸钙， gp : Ca (OH ) 2+C02=CaC03+H20, 由于 碳酸钙混在混凝土 2中能改善混凝土骨料与水泥桨的接触界面， 增强混凝土 2 的强度， 减少混凝土 2的孔隙， 从而提高混凝土 2的耐久性。 本发明的具体实 施例中， 将二氧化碳通入到所述柱状空心 3中， 二氧化碳通过柱状空心 3壁渗 入混凝土 2中， 与混凝土 2中的大量氢氧化钙反应。 本发明中， 将二氧化碳通 过一定的方法通入到空心混凝土构件中， 减少了空气中二氧化碳的排放， 改善 了环境。 Step 300: Forming a hollow concrete member: reacting the concrete with carbon dioxide, gP: After the concrete 2 is formed in the columnar substrate 1, the concrete 2 is reacted with carbon dioxide to form a hollow concrete member. Since concrete 2 contains a large amount of calcium hydroxide (chemical formula is Ca(OH) 2 ), concrete 2 is reacted with carbon dioxide to form calcium carbonate, gp : Ca (OH ) 2 + C0 2 = CaC0 3 + H 2 0, due to carbonic acid The mixing of calcium in the concrete 2 can improve the contact interface between the concrete aggregate and the cement paddle, enhance the strength of the concrete 2, and reduce the porosity of the concrete 2, thereby improving the durability of the concrete 2. In a specific embodiment of the present invention, carbon dioxide is introduced into the columnar hollow 3, and carbon dioxide is infiltrated into the concrete 2 through the columnar hollow 3 wall to react with a large amount of calcium hydroxide in the concrete 2. In the present invention, carbon dioxide is introduced into the hollow concrete member by a certain method, which reduces carbon dioxide emissions in the air and improves the environment.
本发明的优选实施方式是： 所述混凝土 2 与二氧化碳时，所述柱状空心 3 密封， 这样既可以保证混凝土 2与二氧化碳充分反应， 又不会浪费二氧化碳。 本发明的具体实施例是： 所述柱状空心 3中放入干冰， 所述干冰升华后生成的 二氧化碳与所述混凝土 2反应。  According to a preferred embodiment of the present invention, the columnar hollow 3 is sealed when the concrete 2 is combined with carbon dioxide, so that the concrete 2 can be sufficiently reacted with carbon dioxide without wasting carbon dioxide. In a specific embodiment of the present invention, dry ice is placed in the columnar hollow 3, and carbon dioxide formed after sublimation of the dry ice reacts with the concrete 2.
本发明的优选实施方式是： 在形成空心混凝土构件步骤中， 所述混凝土 2 在所述柱状基体 1中成形后， 还包括在高于常压的蒸汽中养护。 即将空心混凝 土构件放置于高于常压的环境中， 再通过加热的方式进行养护， 这样可以缩短 空心混凝土构件的形成时间， 加快空心混凝土构件的形成。 而这个阶段中， 也 可以同时使混凝土 2与二氧化碳充分反应。  A preferred embodiment of the present invention is: In the step of forming the hollow concrete member, the concrete 2 is further cured in the steam above the normal pressure after being formed in the columnar substrate 1. The hollow concrete member is placed in an environment higher than normal pressure, and then heated by means of heating, which can shorten the formation time of the hollow concrete member and accelerate the formation of the hollow concrete member. At this stage, concrete 2 can also be fully reacted with carbon dioxide.
本发明的优选实施方式是： 在所述混凝土 2的柱状空心 3中放入干冰使所 述混凝土 2 的柱状空心 3 压力达到临界状态， 所述临界状态为： 压力大于 7. 4mpa,温度大于 31摄氏度，所述干冰在所述临界状态下升华产生超临界状态 的二氧化碳。 具体来说， 通过干冰质量多少控制柱状空心 3中的压力达到临界 压力， 再通过外部加热使温度达到临界温度， 从而使干冰变成超临界状态的二 氧化碳， 在超临界状态下的二氧化碳同时具有液体与气体的性质， 这样与 Ca (0H) 2的反应速度将会加快， 有利于碳酸钙的形成。 以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通 技术人员来说， 在不脱离本发明构思的前提下， 还可以做出若干简单推演或替 换， 都应当视为属于本发明的保护范围。 The temperature is greater than 7. 4mpa, the temperature is greater than 31. The pressure is greater than 7. 4mpa, the temperature is greater than 31, the pressure is greater than 7. 4mpa, the temperature is greater than 31 Celsius, the dry ice sublimes in the critical state to produce carbon dioxide in a supercritical state. Specifically, the pressure in the columnar hollow 3 is controlled to reach a critical pressure by the quality of the dry ice, and the temperature is brought to a critical temperature by external heating, so that the dry ice becomes a supercritical carbon dioxide, and the carbon dioxide in the supercritical state simultaneously has a liquid. With the nature of the gas, the reaction rate with Ca(0H) 2 will be accelerated, which is conducive to the formation of calcium carbonate. The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

权利要求书 Claim
1.一种空心混凝土构件， 包括混凝土骨料、 水泥、 水， 将混凝土骨料、 水 泥、 水按一定比例搅拌混和形成混凝土， 还包括容纳所述混凝土的柱状基体， 将所述混凝土灌入所述柱状基体中形成柱状空心贴在所述柱状基体的内壁， 所 述混凝土在所述柱状基体中成形后， 将所述混凝土与二氧化碳反应后形成空心 混凝土构件。  A hollow concrete member, comprising concrete aggregate, cement, water, mixing concrete aggregate, cement, water in a certain proportion to form concrete, and further comprising a columnar base body containing the concrete, pouring the concrete into the concrete A columnar hollow body is formed on the inner wall of the columnar base body, and after the concrete is formed in the columnar base body, the concrete is reacted with carbon dioxide to form a hollow concrete member.
2.根据权利要求 1所述的空心混凝土构件， 其特征在于， 所述柱状基体为  The hollow concrete member according to claim 1, wherein the columnar base is
3.根据权利要求 1所述的空心混凝土构件， 其特征在于， 所述柱状基体中 的混凝土经离心旋转形成柱状空心。 The hollow concrete member according to claim 1, wherein the concrete in the columnar base is centrifugally rotated to form a columnar hollow.
4.根据权利要求 1所述的空心混凝土构件， 其特征在于， 所述二氧化碳置 于所述混凝土的柱状空心中， 所述柱状空心密封。  The hollow concrete member according to claim 1, wherein the carbon dioxide is placed in a columnar hollow of the concrete, and the columnar hollow seal.
5.根据权利要求 1所述的空心混凝土构件， 其特征在于， 所述柱状空心中 放入干冰， 所述干冰升华后生成的二氧化碳与所述混凝土反应。  The hollow concrete member according to claim 1, wherein dry air is placed in the columnar hollow, and carbon dioxide generated after sublimation of the dry ice reacts with the concrete.
6.一种制备空心混凝土构件的方法， 包括如下步骤：  6. A method of making a hollow concrete member comprising the steps of:
制备混凝土： 将混凝土骨料、 水泥、 水按一定比例搅拌混和形成混凝土； 混凝土形成柱状空心： 所述混凝土灌入所述柱状基体中形成柱状空心贴在 所述柱状基体的内壁；  Preparing concrete: mixing concrete aggregate, cement and water in a certain proportion to form concrete; concrete forming columnar hollow: the concrete is poured into the columnar base to form a columnar hollow attached to the inner wall of the columnar base;
形成空心混凝土构件： 将所述混凝土与二氧化碳反应。  Forming a hollow concrete member: The concrete is reacted with carbon dioxide.
7.根据权利要求 5所述的制备空心混凝土构件的方法， 其特征在于， 在混 凝土形成柱状空心步骤中，所述柱状基体中的混凝土经离心旋转形成柱状空心。  The method of preparing a hollow concrete member according to claim 5, wherein in the step of forming the columnar hollow of the concrete, the concrete in the columnar base is centrifugally rotated to form a columnar hollow.
8.根据权利要求 5所述的制备空心混凝土构件的方法， 其特征在于， 在形 成空心混凝土构件步骤中， 所述混凝土在所述柱状基体中成形后， 还包括在高 于常压的蒸汽中养护。  The method of preparing a hollow concrete member according to claim 5, wherein in the step of forming the hollow concrete member, the concrete is formed in the columnar substrate and further included in steam higher than normal pressure. Conservation.
9.根据权利要求 5所述的制备空心混凝土构件的方法， 其特征在于， 在形 成空心混凝土构件步骤中， 放入干冰， 所述干冰升华后生成的二氧化碳与所述 混凝土反应。  The method of producing a hollow concrete member according to claim 5, wherein in the step of forming the hollow concrete member, dry ice is placed, and the carbon dioxide formed after the sublimation of the dry ice reacts with the concrete.
10.根据权利要求 9所述的制备空心混凝土构件的方法，其特征在于，在所 述混凝土的柱状空心中放入干冰使所述混凝土的柱状空心压力达到临界状态： 所述临界状态为： 压力大于或等于 7. 4mPa， 温度大于或等于 31摄氏度， 所述 干冰在所述临界状态下升华产生超临界状态的二氧化碳。 10. The method of preparing a hollow concrete member according to claim 9, wherein the columnar hollow pressure of the concrete is brought to a critical state by placing dry ice in the columnar hollow of the concrete: The critical state is: the pressure is greater than or equal to 7. 4m P a, the temperature is greater than or equal to 31 degrees Celsius, and the dry ice sublimes in the critical state to generate carbon dioxide in a supercritical state.
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