Intumescent Silicate Coatings with the Addition of Alkali-Activated Materials

Polymers

Aurelian Cristian Boscornea¹  Nicoleta Florentina Cirstea²  Alina Badanoiu² 

[1] Department of Bioresources and Polymers Science, Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, Polizu 1–7, 011061 Bucharest, Romania;Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University “Politehnica” of Bucharest, Polizu 1–7, 011061 Bucharest, Romania;

关键词: alkali silicate paint;    intumescence;    waste glass;    slag;    alkaline activators;    fire behavior;   

DOI  :  10.3390/polym14101937

来源: DOAJ

【 摘 要 】

Fireproof inorganic coatings based on sodium silicate solution with intumescent additions were prepared and tested to assess their ability to limit the negative effect of a fire. The intumescent materials were obtained by the alkali activation of waste glass powder (obtained by the grinding of recycled soda-lime culet) and slag (waste resulting from the metallurgical industry). The replacement of talc (used as filler in paint formulation) with the intumescent materials obtained by the alkaline activation of waste glass powder (WGP), determined an increase in the intumescence coefficient (up to 65%) and decreased the activation temperature of this process. To evaluate these coatings’ abilities to prevent or delay the temperature increase in metal structures, the paints were applied on steel plates and tested in direct contact with the flame of a butane burner for 60 min. The coatings prevented the increase in the steel substrate temperature over one considered critical (500°C) for steel mechanical properties; the combination of two coatings, with different intumescence activation temperatures, correlated with the increase in the coating’s thickness, sensibly reduced the rate of temperature increase (up to 75%) in the steel substrate.

【 授权许可】

Unknown