Abstract
The results obtained by X-ray, calorimetric and electron microscopy investigations are discussed. The hydration process and structure formation of the proposed rapid hardening composites for shotcreting on the basis of combined binders is outlined. The relation between the strength and deformability indices and the structural characteristics is analyzed. The results obtained from these tests carried out in production conditions -- widening of the tunnel -- are also analyzed. Conclusions about the application for shotcreting of the offered composites are drawn.
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