| Popis: |
The article presents the results of research aerated concrete properties, in which a part of the mineral filler is replaced by a light, environmentally friendly organic filler – flax straw. The flax straw is a renewable and 100% natural waste of the agricultural industry, which can be widely used to obtain thermal insulation materials. It has been shown that the partial replacement of the mineral filler in aerated concrete by the flax straw can lower its average density by 44 and 51%, respectively. The influence of water-solids ratio on strength and average density of flax aerated concrete is investigated. It is established that the optimum value of water-solids ratio is 0.8–1, at which the average density of aerated concrete is 300–400 kg/m3 and the compressive strength is 0.62–1.1 MPa. It is shown that in order to decrease the average density of aerated concrete on the basis of vegetative fillers, the temperature of the aerated concrete mixture should be 35–45 °C. Thus, the developed thermal insulation material – aerated concrete on the basis of organic and mineral fillers can be used for the construction of low-energy buildings, which is consistent with the principles of sustainable development in construction. |
