Abstract

The aim of the study is to identify the features required for the correct construction of board materials from pine bark on mineral binders. Achieving this goal was carried out by studying the effect of the fractional composition of the filler, strengthening and sealing structural additives, as well as external hardening coatings.

The use of bark as fuel is not always convenient due to high ash content and humidity, however, enterprises are forced to dispose of this waste on their territory. The solution to the questions raised is found in this work. The bark is proposed to be used instead of wood shavings and other organic fillers in the production of composite building materials with a mineral matrix in the form of a cement and gypsum binder

The authors made board materials from the bark with Portland cement and gypsum according to different recipes, determined the density, humidity, water and moisture absorption, thermal conductivity, bending strength, and absorption dynamics. It was also investigated what effect additives and surface hardeners have on the mechanical properties of the boards.

Based on the results of the experiments, conclusions were drawn. It is recommended for slabs with insulating purposes to use larger particles of bark with the condition of maximum filling of the composite with them. Cement as a binder should be used for the production of large-sized products operated in more aggressive conditions, and gypsum for small-sized products for indoor use. Adding fiberglass mesh to the slab construction will significantly increase the load-bearing capacity.