Lift Stations-A Testing Ground for Concrete Durability


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Lift Stations-A Testing Ground for Concrete Durability

Author(s): Shondeep L. Sarkar

Publication: Special Publication

Volume: 170


Appears on pages(s): 1357-1378

Keywords: Carbonation; concretes; durabilty; ettringite; gypsum; sulfuic acid; sulfate attack.

Date: 7/1/1997

A network of lift stations forms an integral part of a city’s wastewater disposal system. These underground concrete pits through which the sewage is pumped, are known to represent an environment highly conducive for chemical attack of concrete. Apart from the acidic state created by the sewage, gases emanated due to microbial reactions can cause the concrete to deteriorate rapidly. Fifteen lift stations were investigated to determine the deterioration depth profile of the concretes. Cores from strategic locations inside each lift station were tested and analyzed using different techniques, including petrography and scanning electron microscopy. Based on these results, a cost-effective yet practical means of evaluating the present state of the concrete, and the precise depth to which the concrete must be removed for effective rehabilitation has been developed. These results are presented in this paper.