Pavers and block composite materials and methods of preparation thereof

    公开(公告)号:US11225438B2

    公开(公告)日:2022-01-18

    申请号:US16597666

    申请日:2019-10-09

    Abstract: The invention provides novel paving stones and construction block composite materials and methods for preparation thereof. The paving stones and construction block composite materials can be readily produced from widely available, low cost precursor materials by a production process that involves compacting in a mold that is suitable for large-scale production. The precursor materials include calcium silicate, for example, wollastonite, and particulate filler materials which can comprise silicon dioxide-rich materials. Additives can include calcium carbonate-rich and magnesium carbonate-rich materials. Various additives can be used to fine-tune the physical appearance and mechanical properties of the composite material, such as colorants such as particles of colored materials, such as, and pigments (e.g., black iron oxide, cobalt oxide and chromium oxide). These paving stones and construction block composite materials exhibit visual patterns similar to stone as well as display compressive strength and water absorption equal to or better than that of stone.

    Cement chemistries
    36.
    发明授权

    公开(公告)号:US10233127B2

    公开(公告)日:2019-03-19

    申请号:US15409352

    申请日:2017-01-18

    Inventor: Vahit Atakan

    Abstract: A cementitious composition comprising a crystalline phase and an amorphous phase, and an activator selected from the group of materials comprising inorganic bases. In some cases the crystalline phase is gehlenite. In some cases the crystalline phase is anorthite. In some cases the amorphous phase is amorphous calcium aluminum silicate. In some cases the activator is elected from OPC (1-70 wt %), free lime (1-20 wt %), calcium hydroxide (1-20 wt %), and alkali hydroxides (NaOH, KOH 1 to 10 wt %), individually or in combination. A low lime cementitious material is cured by reaction with a curing reagent that includes a reagent chemical that is synthesized from CO2. Examples of such a reagent are oxalic acid and tartaric acid.

    LIGHTWEIGHT COMPOSITE MATERIALS PRODUCED FROM CARBONATABLE CALCIUM SILICATE AND METHODS THEREOF
    38.
    发明申请
    LIGHTWEIGHT COMPOSITE MATERIALS PRODUCED FROM CARBONATABLE CALCIUM SILICATE AND METHODS THEREOF 审中-公开
    由碳酸钙生产的轻质复合材料及其制备方法

    公开(公告)号:US20160340261A1

    公开(公告)日:2016-11-24

    申请号:US14715497

    申请日:2015-05-18

    Abstract: An aerated composite material produced from carbonatable calcium silicate compositions (carbonation cured AAC) that has a compressive strength equivalent to autoclaved aerated concrete (ordinary AAC) at substantially the same density and a process of production of the same are provided. The composite material of the present invention comprises: a plurality of bonding elements, each including a core comprising calcium silicate, a first layer which partially or fully surrounds the core and is rich in SiO2, and a second layer which partially or fully surrounds the first layer and is rich in CaCO3; a plurality of filler particles having their particle sizes ranging from 0.1 μm to 1000 μm; and a plurality of voids; wherein the plurality of bonding elements and plurality of filler particles together form a bonding matrix and are substantially evenly dispersed in the matrix and bonded together, the plurality of voids are bubble-shaped and/or interconnected channels, a pore volume with a radius of 0.004 μm to 10.0 μm in the plurality of voids is 0.30 ml/composite material 1 g or less, and a estimated compressive strength expressed by the following formula (1): estimated compressive strength (absolute dry density=0.50)=compressive strength×(0.50÷absolute dry density)2 is 2.0 N/mm2 or greater.

    Abstract translation: 提供了一种由具有与基本相同密度的高压消毒加气混凝土(普通AAC)相当的抗压强度的碳酸钙硅酸盐组合物(碳化固化AAC)生产的充气复合材料及其生产方法。 本发明的复合材料包括:多个结合元件,每个结合元件包括一个包含硅酸钙的芯,第一层,其部分或完全包围该芯并且富含SiO 2;以及第二层,其部分地或完全地围绕第一 层,富含CaCO3; 多个粒径为0.1μm〜1000μm的填料粒子; 和多个空隙; 其中所述多个接合元件和多个填料颗粒一起形成接合基质并且基本均匀地分散在基质中并结合在一起,所述多个空隙是气泡形和/或互连通道,半径为0.004的孔体积 在多个空隙中的微米至10.0μm为0.30ml /复合材料1g或以下,由下式(1)表示的估计抗压强度:估计的抗压强度(绝对干密度= 0.50)=抗压强度×(0.50 ÷绝对干密度)2为2.0N / mm2以上。

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