Nitrite admixed concrete for wastewater structures: Mechanical properties, leaching behavior and biofilm development

Authors

Xuan Li, University of Queensland
Liza O'Moore, University of Queensland
Simeon Wilkie, University of Queensland, Getty Conservation Institute
Yarong Song, University of Queensland
Jing Wei, University of Queensland
Philip Bond, University of Queensland
Zhiguo Yuan, University of Queensland
Lucija Hanzic, University of Queensland
Guangming Jiang, University of Wollongong, University of QueenslandFollow

RIS ID

139731

Publication Details

Li, X., O'Moore, L., Wilkie, S., Song, Y., Wei, J., Bond, P. L., Yuan, Z., Hanzic, L. & Jiang, G. (2020). Nitrite admixed concrete for wastewater structures: Mechanical properties, leaching behavior and biofilm development. Construction and Building Materials, 233 117341-1-117341-9.

Abstract

This study systematically investigated the impacts of calcium nitrite addition on the mechanical properties and biofilm communities of concrete-based wastewater infrastructures using sulfate resistant cement through standard tests and DNA sequencing, respectively. The results revealed that setting time and water demand for normal consistency were reduced, but slump, drying shrinkage, and apparent volume of permeable voids increased with calcium nitrite dosage up to 4% weight of cement. The cumulative leached fraction of nitrite, 28-day compressive strength and biofilm communities were not significantly affected by calcium nitrite dosages. The addition of calcium nitrite into concrete is environmentally friendly to wastewater infrastructures.