45results about How to "Good fire resistance and heat resistance" patented technology

The invention provides a high-safety undercutting anchor bolt and a connecting structure thereof. The undercutting anchor bolt comprises a fastening sleeve, and a metal anchor rod of the undercutting anchor bolt is provided with an anti-loose anchoring section. Under the action of a tool, the fastening sleeve tightly presses a connected part, an inner hole of the fastening sleeve shrinks to tightly wrap the anti-loose anchoring section, an concave-convex inner hole surface matching with an anti-loose stripe on the surface of the anti-loose anchoring section is formed, and accordingly permanent connection without welding is formed. A sleeve and an expansion component are two split independent elements, the sleeve of the undercutting anchor bolt is a plastic part, and one or multiple axial grooves are formed in the middle and the front of the outer wall of the sleeve. The undercutting anchor bolt has the advantages that permanent firm connection can be realized without welding, loosening is prevented, connection strength is improved greatly, anti-seismic requirements are met, and labor and cost can be saved; flexible anti-seismic measures are applied, so that anti-seismic performance is improved; by the aid of radial deformability of the sleeve and avoidance of the axial grooves, local bends in holes are penetrated to realize reliable connection, and cost is saved as reperforating is avoided.

The invention provides a load-bearing autoclaved aerated concrete wall material prepared by mixing saponin air-entraining agents, which uses calcium and silicon materials as main raw materials and mixes a small amount of air-entraining agents, regulators and air-entraining Air agent, the autoclaved aerated concrete is made by hydration reaction, pouring into mold, pre-formation, cutting and forming, autoclaving curing, and processing out of the kettle. The product has a dry density of <795 kg / m3, a compressive strength of >10.09 MPa, an average pore diameter of <0.45 mm, a dry thermal conductivity of <0.19 W·m-1·K-1, and a pass rate of >95%, which is higher than the national standard The formulated requirements for high-grade heavy-duty autoclaved aerated concrete blocks are a single wall material that can meet more than 65% of energy-saving requirements in cold regions of my country. By adding a small amount of saponin air-entraining agent, the ratio of water to material in the production process, the gas production per unit of aluminum powder and pouring stability, as well as the volume, strength and quality of the product can be significantly improved. The invention has the advantages of novel conception, abundant raw materials, simple process, low cost, environmental protection and energy saving, convenient implementation and greater popularization.