Abstract
The article considers the prospect of plant wastes usage as aggregates while constructing new building materials in the form of wall blocks. The results of the research on water absorption of the wall blocks at the relative air humidity of 97 % are presented. The kinetics of change in humidity and the coefficient of thermal conductivity of the blocks with the rye and buckwheat straw coarse aggregate, and also the blocks with fine coarse aggregate of flax boon and atomized buckwheat are analyzed. Empirical dependences of the coefficient of thermal conductivity on the rate of humidity of wall blocks are obtained from experimental observations. After the maximum rate of hygroscopic moisture absorption, the best indexes are recorded on the blocks made of flax and straw. The humidity rate of the composite does not exceed 10,9 % with the increase of thermal conductivity up to 0.104 W/(m•°С).
 In the result of the research, the solution to the sustainable use of agricultural wastes to get environmental responsible building materials is proposed. Blocks can be are used in the erection of supporting and filler walls in one-story buildings and multistoried frame housing construction when filling exterior wall openings.
Highlights
The article considers the prospect of plant wastes usage as aggregates while constructing new building materials in the form of wall blocks
Empirical dependences of the coefficient of thermal conductivity on the rate of humidity of wall blocks are obtained from experimental observations
Совершенствование технологии производства композиционных материалов на основе древесных наполнителей и костры льна : дис
Summary
Как отмечается в работах [17, 18], для доказательства эффективности и долговечности стеновых блоков необходимо проводить исследования по установлению влияния влажности материала на показатель теплопроводности. В этой связи проведен комплекс исследований по установлению влияния показателя влажности материала на коэффициент теплопроводности стеновых блоков на основе отходов сельскохозяйственного производства и ниже приведены результаты выполненных исследований. Для определения влияния влажности на коэффициент теплопроводности из стеновых блоков в возрасте 28 суток вырезали образцы в виде плит размером 250×250×30 мм. Проведенные исследования показали, что за первые 2 суток плотность соломенных плит возросла на 20 кг/м3, коэффициент теплопроводности на 0,005 Вт/(м∙°С), а влажность образца достигла 3,8 %. Плотность плит на заполнителе из гречишной соломы (образец 11) в первые 2 суток выросла на 28 кг/м3, коэффициент теплопроводности на 0,01 Вт/(м∙°С), а влажность образца составила 5,3 %.
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