Open AccessResource-saving potential of brick scrap from demolition of buildings
Author(s) -
I. K. Domanskaya
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/966/1/012060
Subject(s) - scrap , brick , cement , aggregate (composite) , demolition , materials science , mortar , masonry , demolition waste , raw material , pozzolan , portland cement , waste management , metallurgy , environmental science , composite material , engineering , chemistry , civil engineering , organic chemistry
The composition and properties of crushing products of brick scrap of different sizes were studied. It is shown that a large (5–40 mm) and small (0.16–5.0 mm) fraction of brick scrap crushing products may be of interest for replacing natural aggregates, while a pulverized (0–0.16 mm) fraction has pozzolanic activity. The presence of cement masonry mortar in the composition of products for crushing scrap brick walls of buildings is the main obstacle to their use as a large aggregate for light concrete: the average density of crushed brick grains in this case was 890 kg/m 3 , while for crushed cement grains – at least 1350 kg/m 3 . With an increase in the degree of crushing of these wastes, their material composition and physical properties are averaged and therefore more suitable for reuse in construction, including as a fine aggregate for mortars. The chemical and mineral composition of brick scrap, studied on the example of a dusty fraction, allows us to predict its good prospects for replacing natural mineral raw materials in the production of firing materials, for example, Portland cement.