Open AccessOn Standard Requirements to Cement for Concrete Used in Marine Environment
Author(s) -
S V Vavrenyuk,
Yu.V. Efimenko,
V.G. Vavrenyuk
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/753/2/022040
Subject(s) - calcium hydroxide , cement , corrosion , silicate , clinker (cement) , permeability (electromagnetism) , leaching (pedology) , calcium silicate , materials science , environmental science , metallurgy , chemical engineering , composite material , chemistry , engineering , portland cement , soil science , biochemistry , membrane , soil water
The article describes the process of leaching (washing-out of calcium hydroxide from the cement stone) the concrete in a zone of variable sea level under the action of capillary forces, resulting to increase the diffusion permeability of concrete against aggressive ions. It was noted that along with physical factors like the density (permeability) of concrete, the corrosion processes in the marine environment are associated with chemical factors, in particular with the content of tricalcium silicate in clinker which is the main supplier of calcium hydroxide. In this regard, we researched the current regulatory documents (GOSTs) on cements for the requirements for the maximum content of tricalcium silicate in clinker. The research pointed out the absence of requirements for this indicator there, while many researchers believed that the role of tricalcium silicate was important enough in ensuring the frost and corrosion resistance of concrete in the marine environment in the zone of variable level.