Open AccessInfluence of fly-ashes on properties of ordinary concretes
Author(s) -
Gabriela Rutkowska,
K. Wiśniewski,
Marek Chalecki,
Mirosława Górecka,
Kamil Miłosek
Publication year - 2016
Publication title -
annals of warsaw university of life sciences-sggw. land reclamation
Language(s) - English
Resource type - Journals
eISSN - 2081-9617
pISSN - 1898-8857
DOI - 10.1515/sggw-2016-0007
Subject(s) - fly ash , compressive strength , portland cement , ultimate tensile strength , curing (chemistry) , materials science , calcareous , cement , composite material , environmental science , geology , paleontology
Influence of fly-ashes on properties of ordinary concretes. Care of the environment in accordance with the principles of sustainable development introduces the possibility and need for waste recycling. The construction and building materials industry has the greatest potential for reuse of waste. The article presents the results of investigations of selected properties (consistency, water absorbability, compressive strength and tensile strength after 28 and 56 days of curing, depth of penetration) of ordinary concretes and concretes containing fly-ashes - calcareous and siliceous ash − in their composition. To make the samples, the Portland cement CEM I 42.5 R and natural aggregate with graining of 0-16 mm were used. The concrete with siliceous and calcareous admixtures was made in three lots where the ash was added in the quantity of 15, 20 and 30% of the cement mass. After the tests, it was stated that the fly-ash admixture does not increase the air content in the mix, it increases the compressive strength in time and the siliceous ash improves the splitting tensile strength