Non-Destructive Concrete Stress Evaluation

    公开(公告)号:US20210164945A1

    公开(公告)日:2021-06-03

    申请号:US17263229

    申请日:2019-07-29

    Abstract: A system of monitoring diffuse waves over a concrete beam under different loads. Ultrasound transmitters and receivers are placed over the concrete beam to emit sound waves and collect diffuse waves under different loads. The waveform variations are observed to quantify a decorrelation coefficient (DC) indicating global structural changes and crack position. An inversion of the correlations is applied to estimate distribution density at each localized position following the sensitivity kernel and inversion algorithms. Then, three-dimensional imaging comprised of density values at each localized position are generated to indicate number, position, and depth of multiple cracks.

    Investment casting refractory material
    136.
    发明授权
    Investment casting refractory material 有权
    投资型耐火材料

    公开(公告)号:US09539637B2

    公开(公告)日:2017-01-10

    申请号:US13735770

    申请日:2013-01-07

    CPC classification number: B22C1/02 B22C9/04

    Abstract: An investment casting method involves producing a casting shell by applying a hardenable refractory material to a sacrificial pattern. The casting shell having a plurality of phosphate bonds in the hardenable refractory material, which provide increased structural integrity during casting and improved frangibility during shell removal. The casting shell may also have a plurality of gaseous pockets suspended in the refractory material, which do not degrade the structural integrity during casting and provide improved frangibility during shell removal.

    Abstract translation: 熔模铸造方法涉及通过将可硬化耐火材料应用于牺牲图案来生产铸造壳体。 铸造壳体在可硬化耐火材料中具有多个磷酸盐键,其在铸造过程中提供增加的结构完整性,并且在壳体去除期间提高了易碎性。 铸造壳体还可以具有悬挂在耐火材料中的多个气体袋,其在铸造过程中不降低结构完整性,并且在壳体移除期间提供改进的易碎性。

    Carbon microbeads with hierarchical structure
    140.
    发明授权
    Carbon microbeads with hierarchical structure 有权
    具有分层结构的碳微珠

    公开(公告)号:US09309121B2

    公开(公告)日:2016-04-12

    申请号:US12841466

    申请日:2010-07-22

    Abstract: The preset invention is a hierarchically-structured carbon microbead and method for forming the microbead utilizing hydrothermal carbonization of a biomass/catalyst mixture to produce partially carbonized amorphous microspheres, wherein the biomass is an inexpensive material containing a high oxygen content component (e.g., sugar, starch, alcohol), and the catalyst is a metal or metal-containing compound, preferably a transition metal compound, and more specifically a transition metal selected from Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, and Pt. Subsequently, a heat treatment is performed where the amorphous microspheres are heated to a temperature that is sufficiently high so as to result in carbonization, graphitization, and production of a carbonaceous coating or shell on the core of the microbead.

    Abstract translation: 本发明是利用生物质/催化剂混合物的水热碳化来形成微珠的层级结构的碳微珠和方法,以生产部分碳化的无定形微球,其中生物质是含有高含氧量成分(例如糖, 淀粉,醇),催化剂为金属或金属的化合物,优选为过渡金属化合物,更具体地为选自Fe,Co,Ni,Ru,Rh,Pd,Os,Ir和Pt的过渡金属。 随后,进行热处理,其中无定形微球体被加热至足够高的温度,从而在微珠核心上进行碳化,石墨化和碳质涂层或壳的生产。

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