RILEM Report on Self Compacting Concrete (Part 1)-Final report of RILEM Technical Committee 188-CSC Casting of Self Compacting Concrete (PDF)

Final report of RILEM Technical Committee 188-CSC Casting of Self Compacting Concrete (PDF)

Pdf Summary

The final report of the RILEM Technical Committee 188-CSC delves into the casting of Self-Compacting Concrete (SCC). SCC represents a substantial innovation within the concrete industry, eliminating the need for vibration for compaction, thereby enhancing productivity and improving the working environment. This report discusses the key aspects of SCC, including its development, constituents, mix design, and quality assurance.<br /><br />The introduction of SCC has considerably optimized the concrete production process. Fresh SCC, unlike traditional concrete, requires a distinct workability performance which includes filling and passing ability, and segregation resistance. This means SCC must effectively fill forms and pass through obstacles without segregating or losing homogeneity.<br /><br />SCC advancements are attributed to nanoscale tailoring of molecules in surface-active admixtures, enhanced understanding of particle packing, and the role of mineral surfaces in cementitious matrices. The report emphasizes the importance of evaluating rheological behavior for designing SCC, which requires analyzing yield stress, viscosity, and thixotropy—factors influenced by the nano and microstructure of materials.<br /><br />The process for creating SCC requires precision in mixing and transporting, starting with the handling of constituent materials. Accurate control of moisture in aggregates, precise batching, and optimal mixing techniques are crucial for maintaining the consistency and quality of SCC. Furthermore, quality assurance methods primarily focus on workability-related test methods, although rheological evaluations are gaining traction for in-depth analysis.<br /><br />In sum, the advent of SCC marks a breakthrough change in concrete production, promising improved surface quality, strength, and durability while also enhancing safety and working conditions. The implementation of SCC requires comprehensive understanding and application of its chemical properties and production processes to maximize its benefits in the construction industry.

Keywords

Self-Compacting Concrete

SCC

concrete innovation

mix design

quality assurance

workability performance

rheological behavior

nanoscale tailoring

particle packing

construction industry