Additive having hydraulic activity forshotcrete
V.A. Alekseev1, leading engineer; Yu.M. Bazhenov2, Doct. tech. Sciences, prof .; S.I. Bazhenova2, cand. tech. Sciences, Assoc .; O.Yu. Bazhenova2, Cand. tech. Sciences, Assoc .; R.S. Bisembaev2, student; N.S. Mironchuk2, student 1 NIC OPP JSC Mosinzhproekt; 2 Moscow State University of Civil Engineering (National Research University)
Abstract. This article contains information about perspectives of development of sprayed concrete. This type of concrete is widely used in 3Dconstruction, fastening of tunnels at mining facilities, maintenance and repair activities etc.
Binder is the most important part of sprayed concrete and it forms main properties of hardened concrete surface and structures made from it. It is possible to purposefully change properties of concrete mix and increase them depending of the task by modifying binders.
The results of experimental study show decreased standard consistency of modified binder paste and increased strength of ready concrete due to higher level of compaction of binder. Achieved results could allow to create effective mixes of sprayed concrete with increased physical properties and durability of hardened concrete elements.
Key words: 3Dconstruction, shotcrete, concrete spray technology, active mineral additive, activation, optimal packing, dense structure.