Recently, eight scientific and technological achievements of the First Company and the Eighth Company affiliated to the Western Construction of China Construction have been granted national patents.
01 "a low-grade mixed sand concrete, test block forming device and strength testing method"
, a technical achievement declared by the company, "a low-grade mixed sand concrete, test block forming device and strength testing method", was authorized by the State Intellectual Property Office. By optimizing the mix proportion, the fluidity, anti-dispersion and underwater pouring stability of low-grade mixed sand concrete are significantly improved, and the problems of bleeding segregation and rapid slump loss are effectively solved. The strength testing device and method developed to simulate the underwater forming environment ensure the accuracy of strength testing and provide a reliable quality control scheme for underwater concrete engineering.
02 "High slump and high fluidity concrete based on fully recycled coarse aggregate and its mixing process"
a technical achievement declared by the eighth company, "High slump and high fluidity concrete based on fully recycled coarse aggregate and its mixing process", was authorized by the State Intellectual Property Office. In order to solve the problems of rapid slump loss, poor fluidity and low substitution rate of recycled coarse aggregate concrete, the slump retention of recycled coarse aggregate concrete is greatly improved through the synergistic effect of "large amount of mineral admixture technology", "admixtur e composite technology", "recycled coarse aggregate pretreatment technology" and "mixing process design technology". And that defect of an interface transition zone is improve, so that the concrete has high slump loss resistance and high fluidity, and the regenerate coarse aggregate is completely replaced, and the method is suitable for popularization and application in ready-mixed concrete.
03 "a Curing Agent for Environment-friendly Conductive Cement-based Materials and Its Preparation Method and Application"
, a technical achievement declared by the Eighth Company, "a Curing Agent for Environment-friendly Conductive Cement-based Materials and Its Preparation Method and Application", was authorized by the State Intellectual Property Office for invention patents. In order to solve the problems of slow development of early strength of concrete in winter construction, carbonization and environmental pollution caused by industrial by-products such as steel slag and rice husk ash, this achievement innovatively exerts the physical and chemical characteristics of industrial solid wastes such as ground steel slag powder, metakaolin and modified rice husk ash, and uses alkali-activated technology to significantly improve the low temperature carbonization resistance, early strength and durability of concrete. This achievement not only meets the needs of high strength and high carbonization resistance of concrete in winter construction, but also provides a new path for the efficient utilization of industrial solid waste.
04 "a kind of fair-faced concrete for chimney of power plant and its preparation method"
a technical achievement declared by the eighth company, "a kind of fair-faced concrete for chimney of power plant and its preparation method" was authorized by the State Intellectual Property Office. In order to solve the problems of cracking, corrosion and surface pollution of chimney concrete in power plant under high temperature and acidic environment, the high temperature resistance, acid corrosion resistance, self-cleaning function and durability of concrete were significantly improved by introducing by-products such as metakaolin and fly ash, and combining with shale ceramsite loaded photocatalytic materials and polydimethylsiloxane emulsion protection technology. This achievement not only meets the requirements of chimney structure for high strength and durability of concrete, but also provides a new path for efficient utilization of industrial solid waste and environmental protection.
05 "a kind of admixture for building formwork concrete"
, a technical achievement declared by eight companies, "a kind of admixture for building formwork concrete" was authorized by the State Intellectual Property Office. Aiming at the problems of insufficient thixotropy, slurry leakage, weak interfacial bonding and shrinkage cracking in the construction of building formwork concrete, this achievement innovatively introduces chitosan modified metakaolin to construct a synergistic mechanism of "thixotropy regulation, interfacial enhancement and anti-cracking compensation", which significantly improves the rheological properties, interfacial bonding strength and anti-cracking durability of concrete. This achievement effectively solves the problem of dry shrinkage cracking caused by high binder consumption, ensures the dense filling of complex formwork structure, and realizes the efficient utilization of industrial solid waste such as metakaolin, which provides support for the development of green high performance concrete, and has significant engineering value and environmental protection significance.
06 "a Test Device for Concrete Resistance to Chloride Ion Penetration"
a technical achievement declared by the Eighth Company, "a Test Device for Concrete Resistance to Chloride Ion Penetration", was granted a utility model patent by the State Intellectual Property Office. In order to solve the problems of large data deviation, complex device installation, poor sealing performance and low working efficiency caused by no load influence in the existing concrete chloride ion penetration resistance test, a slidable rectangular strip is innovatively arranged to connect with an electrolytic cell, a loading device is added in the middle, and the technology of fastening buckles and pins and sealing rings is combined. It significantly improves the accuracy of chloride ion penetration testing under load, and achieves the effect of saving time and labor in loading and unloading of test blocks and good sealing of the device. This achievement not only meets the needs of data accuracy and operation convenience of concrete chloride ion penetration test, but also provides new support for improving the work efficiency of relevant technical personnel and optimizing concrete durability research.
07 "a Portable Concrete Slump Detection Device"
a technical achievement declared by the Eighth Company, "a Portable Concrete Slump Detection Device", was granted a utility model patent by the State Intellectual Property Office. In order to solve the problems of large numerical deviation and complex measurement operation caused by the need of secondary calculation in the existing concrete slump detection, the intuitive and accurate reading of the slump value is significantly improved by setting a pre-positioned sleeve and scale plate matching structure and combining the technologies of traction spring reset, extension plate adjustment and guide rail movement. The adaptation of that device to slump cylinder with different heights and the convenience of operation are realize. This achievement not only meets the requirements of concrete slump detection for data accuracy and operation efficiency, but also provides a new choice for on-site rapid evaluation of concrete mixture workability.
08 "a Machine-made Sand Concrete Pumping Device"
a technical achievement declared by the Eighth Company, "a Machine-made Sand Concrete Pumping Device", was granted a utility model patent by the State Intellectual Property Office. Aiming at the problems of fixed structure, large pressure fluctuation and easy blockage of the existing machine-made sand concrete pumping device, this achievement effectively reduces the risk of sudden increase of pumping pressure and improves the stability and safety of the equipment by designing a detachable delivery pipe and flange quick-assembly structure, and combining with the pressure regulation system composed of buffer and container tank. Meanwhile, the inverted L-shaped and C-shaped combined support is adopted, so that the stability is enhanced, the disassembly and the transportation are convenient, the construction convenience is greatly improved, the reliable guarantee is provided for the concrete pumping under complex working conditions, and the engineering application prospect is wide.
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