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Performing characteristics on envelope composite of near space airship (NSA) are quite different from that of the low altitude airship essentially. The NSA envelope material should meet excellent applicative characteristics including light weight, high strength, anti-aging, anti-ultraviolet radiation, gas-tightness, weather resistance. Ground simulation test is critical for the envelope design and development process of NSA, and the environmental features of near space is analyzed for NSA, then corresponding ground simulation test methods are proposed to involve mechanical strength of the ground test methods among the changing weather temperature and over pressure changes, materials weather resistance and air tightness test. Finally the coupling relationship between various mechanical test and environmental test methods is also investigated.

In this paper, the durability of the traffic signs at Home and Abroad category and its photometric performance and weather resistance level of retroreflective material standard analysis to explore the scientific correlation between the durability of traffic signs and retroreflective material. Association analysis of the durability of the traffic signs and retroreflective material, the durability of the traffic signs depend on the photometric performance of the retroreflective material should conduct in-depth research for the photometric performance of the retroreflective material attenuation law for the scientific forecast traffic signs service life to provide a theoretical basis.

Building leakage is a chronic and stubborn disease to influence the quality of building engineering. The traditional waterproof coiled material such as asphalt has properties of poor weather resistance, easy to crack and large pollution. GT is a kind of green building material with superior performance. GT materials used in building waterproof can fundamentally solve the problem of waterproofing, impermeability and plugging in construction. In this article, the author discuss performance characteristics, construction technical measures and quality testing standards of GT paint, analysis the technical points of GT waterproof paint applied in construction engineering.

The traditional waterproof membrane on roof such as asphalt membrane, SBS and APP modified bitumen membrane has poor weather resistance and poor durability. So, leakage phenomenon often appears. While GT waterproof material, each property is superior, the construction is simple and efficient, which applied to waterproof of building roof has broad prospects, can thoroughly cure roof leakage problems. According to the properties, characteristics and applicability of GT material, analysis its technology points of base treatment and construction measures applied in roof waterproof.

In this study, carbon fiber/ polypropylene (PP) complex braiding yarn, with its different breaking strength, was prepared. It was designed by braiding polypropylene (PP) wrapped yarn and carbon fiber core yarn using eight and sixteen spindles braiding machines, with change of take-up gear number. Environmental factors, such as pH, temperature and time, were also changed to produce geo-grids with high strength, high modulus and better weather resistance. In order to make stable structure for complex braiding yarn, the heat treatment was also considered. Finally, geo-grids braiding by optimal treatment parameters were cut into single rib and junction specimens for tensile test.

Two camouflage paints were developed respectively on the surface of concrete and metal surface for getting high weather resistance. Different materials and their ratios especially those used in anti-aging agents, pigments and fillers were studied. Results indicated the prepared compound formula could significantly improve the properties of camouflage paints. The useful lives of products were extended and could meet the requirement of military.

The weather resistance of 10CuPRE、10CuP and Q235 steels were studied by dry-wet cyclic immersion test. The corrosion resistance mechanism of rare earth Cu-containing weathering steel was studied through electrochemical polarization test, scanning electron microscope(SEM) and X ray diffraction(XRD). The results show the small and spherical rare earth oxysulfides replace the elongated MnS inclusions in the rare earth weathering steel. Less and fewer rare earth oxysulfides heavily decrease pitting susceptibility and rate of pit propagation. So the electrochemical corrosion of microarea in the steel matrix is weakened after rare earth was added in the Cu-containing weathering steel. The inner rust layer of rare earth weathering steel is more compact and uniform than that of weathering steel without rare earth. The main corrosion product on the rare earth weathering steel is α-FeOOH. The formation of the steady corrosion product is promoted by rare earth, which result in that the protective property of the inner rust layer on weathering steels is enhanced. As a result, the corrosion resistance of Cu-containing weathering steel is improved by rare earth elements.