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This is to certify that your paper entitled «Analysis of the Influence of Nanosilica and Industrial By-Products on the Durability of Concrete Using Intelligent Modeling.» was indexed with 20 pages, in the CIVILICA citation database, code COI:IDEACONF14_017, after evaluation and approval of the referees of the "the 14th International Conference on Strategic Ideas in Architecture, Civil Engineering and Urban Planning in Iran held in Mashhad 2025.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.