Open AccessStructure and properties of recycled concrete aggregate
Author(s) -
Оксана Ларсен,
I V Komoleva,
P D Tobolev,
Vitaly Naruts,
S O Badamshin
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1614/1/012005
Subject(s) - aggregate (composite) , mortar , specific gravity , reuse , absorption of water , environmental science , waste management , natural materials , materials science , composite material , engineering , polymer science
The problem of waste reuse from building industry is acute around the civilized world. The construction of infrastructure in large cities increases the amount of building waste. This study presents the possibility of using concrete waste of residential buildings included in the renovation program of the Moscow. The use of recycled aggregates obtained from demolished concrete allows saving the content of natural aggregates in concrete and significantly reducing the amount of waste that pollutes the environment. Their use is possible in structures with the proper concrete mix content with maintenance of the same properties. Recycled concrete aggregates differ from natural aggregates as the former aggregate contain adhered mortar. The content of the adhered mortar in coarse recycled concrete aggregate was determined on fraction of 5-10 mm. In this study, limestone aggregate was used as initial in structure of recycled concrete aggregate. The quantitative content of crushed concrete components was carried out using quantitative analysis. The main characteristics including specific gravity and water absorption of recycled aggregate were determined. The specific gravity and density of aggregate were 2.59 g/cm 3 and 1.9 g/cm 3 , respectively. The water absorption and mortar content were 3.8% and 39.9%, respectively.