Determination of surface properties of different formwork release agents on strength concrete

DURMUŞ G., ÇELİK D. N., K. Demircan R., Ç. Demirci E.

Materials Today: Proceedings, 2023 (Scopus) identifier

  • Publication Type: Article / Article
  • Publication Date: 2023
  • Doi Number: 10.1016/j.matpr.2022.12.263
  • Journal Name: Materials Today: Proceedings
  • Journal Indexes: Scopus, INSPEC
  • Keywords: Carbonatization, Compressive strength, Formwork oil, Ultrasound velocity, Wood formwork
  • Gazi University Affiliated: Yes


© 2023In this study, concrete samples were poured into mold using three different formwork oils and the impact of formwork oil on concrete surface hardness and carbonatization was investigated. 60x60x10 cm3 sized wood formworks were produced by class II pine timber. Three kinds of formwork oils were used such as standard (K1), concentrate (K2) and plywood formwork oils (K3). Concrete blocks were developed by pouring the C20 strength class of concrete into formworks. Concrete surface hardness and carbonatization depths were measured by taking cores giving dimensions of ϕ50x100 mm. The results revealed that the highest surface hardness and carbonatization values were obtained from concentrate formwork oil. The surface hardness was 10 % higher and the carbonatization was 49 % least than oil-free formworks.