Wall materials based on complex binders and organic aggregate

Abstract

Abstract The technology of hards concrete developed in this study differs primarily by the binders - semi-burnt dolomite, related to magnesia cements. Grouting fluid is bischofite (MgCl2) or magnesium sulfate (MgSO4), density 1.2 g/cm3. One of the ways of strengthening and adding new properties to hards concrete, which can significantly expand its application domain, is an introduction of chrysotile to the concrete composition. The best specimen have density 570-585 kg/m3, strength 14.5 - 15.1 MPa and low thermal conductivity (0.065-0.074) W/(m·K), what allow them to serve as structural and thermal insulation material. Sound absorption coefficient is from 0.17 to 0.6 (at audio frequencies of 125-2000 Hz). Frost resistance exceeds 50 cycles, water absorption is 40-50%, shrinkage is less than 0.4%, fire stability is 0.75-1.54. Based on the results obtained, it can be concluded that the material is most applicable in low-rise construction. The developed material will solve the problem of utilizing of industrial hemp waste from textile production and dolomite waste in the form of a magnesian binder, thereby reducing the cost of the material in compare with existing world analogues.