Additional Insights on the Influencing Factors and Mechanism of Degradation Due to Acid Attack: Special Case of Acids Forming Soluble Salts

Author(s): Ramaswamy K. P. (1, 3), Alexandra Bertron (2) and Manu Santhanam (1)
Paper category: Proceedings
Book title: Proceedings of the 71st RILEM Annual Week & ICACMS 2017,Chennai,India, 3rd -8th September 2017
Editor(s): Manu Santhanam
Ravindra Gettu
Radhakrishna G. Pillai
Sunitha K. Nayar
ISBN: 978-2-35158-196-4
ISBN: 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9:
Publisher: Published by RILEM Publications S.A.R.L.
Publication year: 2017
Pages: 304-315
Total Pages: 12
Language : English

Abstract: Cement-based materials being alkaline in nature are highly vulnerable to the rapid and serious
deterioration by a wide variety of acids present in industrial effluents. Currently, there are hardly
any codes or standards available for evaluating the resistance of materials to acid attack.
However, there is a further need to study the degradation kinetics and to understand the
mechanism so as to evaluate existing alternative materials, hardly studied in the literature so far
and/or developing new materials to resist acid attack. In this view, developing proper test
methods is indispensable.The paper is focused on acids (strong and weak) which form soluble
salts. The mechanisms of attack are discussed in detail. The test results show that the attack by
organic and weak acids such as acetic acid is comparable to that of strong acids such as
hydrochloric and nitric acids in terms of deterioration mechanisms and aggressiveness. Acid
attack phenomenon is influenced by many factors related to acid, materials and the test method
by itself. This paper details about the critical factors affecting the kinetics of degradation and
stresses on the need for developing a proper test method for assessing the performance of
cementitious materials.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00