Abstract
The paper presents studies of changes in the physicomechanical properties of samples based on lime-limestone compositions with rice husk filler hardening in an environment with a high concentration of carbon dioxide. The samples are semi-dry pressing cylinders made of a mixture of hydrated lime, ground limestone and a filler in the form of rice husk in order to reduce the density and increase the heat-insulation ability of building materials based on this raw material mixture. The studies showed that there is an increase in the strength of the samples due to the transition of portlandite to calcite during forced carbonization. The possibility of using waste products of plant origin by the example of rice husk in the production technology of heat-insulating building materials using artificial forced carbonization which will allow obtain products with the following characteristics: compressive strength 2.2 – 4.0 MPA at a density of 700 - 1200 kg/m³, thermal conductivity – 0.11-0.13 W/m•K, has been proved.
Highlights
An integral part of any industrial production is the production of a large number of by-products which are accumulated in the dumps or released into the atmosphere as gaseous waste
The raw material mixture was a composition of lime sifted through a sieve with a mesh size of 0.63 mm, a marble-like limestone of fractionated composition and a special solution obtained by digesting plant waste
It should be noted that the introduction of 30% and 40% of the rice husk into the samples during testing of the samples leads to non-fragile destruction
Summary
An integral part of any industrial production is the production of a large number of by-products which are accumulated in the dumps or released into the atmosphere as gaseous waste. These materials often contain undesirable compounds and their deposition is a serious social problem with the impact on the environment and human health. The analysis of the problem state shows that for most industrial and agricultural industries waste generation is characteristic with a low degree of their use which affects the increase in the area of dumps. The processing of 1 ton of rice produces about 200 kg of waste in the form of rice husk
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