PERFORMANCE TESTING METHOD AND SYSTEM FOR POLYCARBOXYLATE SUPERPLASTICIZER IN CONCRETE SYSTEM

    公开(公告)号:US20240369528A1

    公开(公告)日:2024-11-07

    申请号:US18030180

    申请日:2022-02-22

    Abstract: The present disclosure provides a performance testing method and system for a polycarboxylate superplasticizer in a concrete system. An interface model is constructed based on a calcium silicate hydrate (C—S—H) gel model and a molecular dynamics model of a polycarboxylate superplasticizer, which can cover complexity of a cement particle interface and variability of the polycarboxylate superplasticizer, and can also establish a link between a microstructure of the polycarboxylate superplasticizer and a macroscopic fluidity of a cement across multiple scales. Meanwhile, friction resistance is accurately calculated based on the constructed interface model to accurately test a performance of the polycarboxylate superplasticizer, thereby shortening a screening cycle of the polycarboxylate superplasticizer and improving a performance optimization efficiency.

    ROBOT WELDING METHOD AND SYSTEM BASED ON SEMANTIC FEATURE CLUSTERING

    公开(公告)号:US20240367323A1

    公开(公告)日:2024-11-07

    申请号:US18287115

    申请日:2021-05-20

    Abstract: A robot welding method based on semantic feature clustering; the method comprises: acquiring an image of a workpiece, and generating an image training sample set; performing semantic annotation on the image of the workpiece to generate a semantic training sample set; establishing a semantic clustering model, and training same by using the image training sample set and the semantic training sample set; by using the trained semantic clustering model, identifying an image of a workpiece to be welded, so as to obtain data of the workpiece to be welded; on the basis of the data of the workpiece to be welded and by using parameterized online programming, generating a welding program for the workpiece to be welded; and on the basis of the welding program, executing welding of the workpiece to be welded. By means of the robot welding method based on semantic feature clustering, neither teaching programming nor offline programming is required, thereby improving the precision, efficiency, universality and flexibility. Further provided is a robot welding system based on semantic feature clustering.

    Flexible layer support structure and retractable device

    公开(公告)号:US12103812B2

    公开(公告)日:2024-10-01

    申请号:US18534405

    申请日:2023-12-08

    CPC classification number: B65H75/4465 B65H75/4471 B65H2701/1133

    Abstract: A flexible layer support structure and a retractable device is disclosed. The flexible layer support structure includes a first thin sheet and a second thin sheet arranged in parallel with each other, as well as and a folding spring group sandwiched between the first thin sheet and the second thin sheet and arranged in parallel. The curved elastic pieces in the folding spring group are smoothly overlapped and connected with the thin sheets, so as to enclose a hollow thin-walled elastic structure that can be overlapped and rolled up, can be automatically straightened and has a flat surface. The retractable device includes a winding shaft, a pressure roller, and a flexible layer support structure installed on the winding shaft. The flexible layer support structure of the present disclosure has the advantages in lightweight, high storage ratio, large unfolded area, simple winding, large load bearing capacity, and less damage.

    USE OF SILANE COMPOSITE EMULSION AS ANTI-CRACKING ENHANCER

    公开(公告)号:US20240254047A1

    公开(公告)日:2024-08-01

    申请号:US18004560

    申请日:2021-07-27

    CPC classification number: C04B24/42 C04B22/066 C04B40/0046 C04B2103/408

    Abstract: Provided is the use of a silane composite emulsion as an anti-cracking enhancer in a cement-based material. In the present disclosure, active groups on an isobutyltriethoxysilane molecule react with hydroxyl groups on a surface of a mortar to form a layered hydrophobic structure, slowing down a water loss inside the mortar of a cement-based material. The dehydration of butyl acrylate forms a network structure, which fills pores of the cement-based material, inhibits shrinkage of the cement-based material, and reduces the cracking caused by the shrinkage. Tetraethoxysilane can undergo hydrolysis at a room temperature to generate nano-silica with a large number of hydroxyl groups on a surface; and the nano-silica can undergo secondary hydration with calcium hydroxide in the cement to form a secondary hydration product C—S—H gel, thereby filling most of voids to make a structure of the cement hydration product denser, to increase a strength of the mortar.

    METHOD FOR MODIFYING INTERFACE OF CARBON FIBER REINFORCED THERMOPLASTIC RESIN MATRIX COMPOSITE MATERIAL

    公开(公告)号:US20240246261A1

    公开(公告)日:2024-07-25

    申请号:US18328578

    申请日:2023-06-02

    CPC classification number: B29B15/125 B29C70/443 B29K2307/04

    Abstract: A method with which mechanical properties of the interface of the fiber reinforced thermoplastic resin matrix composite material can be improved by conducting grafting on surfaces of materials. A carbon fiber (CF) and a polymethyl methacrylate resin (PMMA) are subjected to interface modification treatment to introduce active carboxyl groups to the surfaces of the materials. Then, hexamethylene diisocyanate (HDI) is used as a coupling layer for connecting the carboxyl groups on the surfaces of the carbon fiber and on the surfaces of the polymethyl methacrylate resin to form a “molecular bridge”. Accordingly, the interface binding force between the resin and the fiber is improved by chemical grafting. A modified carbon fiber reinforced polymethyl methacrylate composite material sample (CF/PMMA) is prepared by a thin film lamination method, and the composite material sample prepared is subjected to a microscopic verification testing of the validity of the method provided in the present disclosure.

    Concrete interface agent
    140.
    发明授权

    公开(公告)号:US12030821B1

    公开(公告)日:2024-07-09

    申请号:US18522139

    申请日:2023-11-28

    CPC classification number: C04B41/4922 C04B41/463 C04B41/5035

    Abstract: A concrete interface agent relates to the technical field of concrete surface protection, an ingredient of the concrete interface agent comprises 55 to 100 parts by weight of a nano-calcium salt solution and a nano-SiO2 precursor, 0.1 to 0.4 parts by weight of a surfactant, 30 to 60 parts by weight of a silane coupling agent and 10 to 40 parts by weight of a polydimethylsilane, an ingredient of the nano-calcium salt solution comprises 2 to 5 parts by weight of a calcium hydroxide, 2 to 5 parts by weight of an acid catalyst and 200 to 500 parts by weight of an alcohol-based organic solvent, which can form a coating layer with higher hydrophobic angle on the concrete surface, reduce the water absorption of the concrete, and is not easy to crack after drying, which has more protective effect and longer service life than the existing TEOS interface agent.

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