The Influence of Cavitation Synthesis Nanodiamonds on the Properties of Self-Compacting Concrete

This study focuses on the influence of chemically pure nanodiamonds produced by cavitation synthesis on structure formation and physical and mechanical properties of self-compacting concrete (SCC) using an analytical approach. The objective of this research was to develop a high-performance, self-compacting concrete with enhanced properties suitable for the construction sector. Chemically pure nanodiamonds produced by cavitation synthesis (KHA-HC) were added to SCC at weight percentages of 0%, 0.15%, 0.3%, 0.45%, 0.6%, and 0.75% of the binder mass. Fresh SCC modified with nanodiamonds was evaluated for density and cone spread diameter. Hardened SCC with KHA-HC was tested for density, water absorption, compressive strength, and axial compressive strength. The most effective KHA-HC content was established at 0.3%, correlating with 13.5% greater compressive strength, 15.1% higher axial compressive strength, and 19.6% lower water absorption. Incorporating KHA-HC into SCC resulted in a wider spread cone as the additive content was raised. The microstructure of SCC containing KHA-HC was found to be more homogeneous with a decrease in void content within the cement matrix. Polynomial relationships for changes in SCC properties as a function of nanodiamond content were proposed. The effectiveness of nanodiamond additives for modifying SCC was demonstrated. Highly effective self-compacting concretes with improved performance properties have been developed, which are suitable for construction.