What is the fine-grained topic of the following text: Sabancı Holding affiliate Kordsa, known as "the Reinforcer" in the tire, construction and composite industries, has participated in the 40th Turkeybuild Exhibition held at TÜYAP Beylikdüzü exhibition center between May 23–27 and shared its innovative concrete reinforcement synthetic fiber product KraTos with construction industry professionals. Only return the topic.
Kordsa's participation in the 40th Turkeybuild Exhibition and its presentation of the KraTos product.