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Sulfur concrete is a composite construction material, composed mainly of sulfur and aggregate (generally a coarse aggregate made of gravel or crushed rocks and a fine aggregate such as sand). Cement and water, important compounds in normal concrete, are not part of sulfur concrete. The concrete is heated above the melting point of sulfur ca. 140 °C. After cooling the concrete reaches a high strength, not needing a prolonged curing like normal concrete. Sulfur concrete is resistant to some compounds like acids which attack normal concrete. Sulfur concrete was developed and promoted as building material to get rid of large amounts of stored sulfur produced by hydrodesulfurization of gas and oil. Sulfur concrete is also a possible building material for a lunar base. As of 2011, sulfur concrete has only been used in small quantities when fast curing or acid resistance is necessary.
Sulfur concrete steel bar bonding anticorrosion structure and preparation method
This invention discloses a sulfur-bonded anti-corrosion structure for reinforced concrete and its preparation method. Through the chemical bonding effect of the sacrificial anode anti-corrosion layer and the bonding layer, the mechanical interlocking effect of the rough surface of the reinforced concrete, and the interface densification achieved by preheating and synergistic casting, the interface bonding strength reaches ≥3.0 MPa, an improvement of over 60% compared to traditional processes, effectively solving problems such as debonding and hollowing. The sacrificial anode anti-corrosion layer provides dual protection functions of physical shielding and electrochemical protection. Even if the coating is partially damaged, the reinforced concrete can still be protected through the sacrificial anode effect, fundamentally preventing electrochemical corrosion between the reinforced concrete and sulfur. The anti-corrosion life is more than twice that of traditional processes, making it suitable for harsh environments such as chemical plants and high-salt-spray environments. The coating application and preheating casting processes are simple to operate, requiring no complex equipment, and can meet the needs of rapid setting and early strength projects. It is applicable to various engineering scenarios such as roads, bridges, hydraulic structures, and chemical industrial park floors.
Owner:DALIAN OCEAN UNIV