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

被引：26

作者：

Li, Xuan ^{[1
]}

O'Moore, Liza ^{[2
]}

Wilkie, Simeon ^{[1
,3
]}

Song, Yarong ^{[1
]}

Wei, Jing ^{[1
]}

Bond, Philip L. ^{[1
]}

Yuan, Zhiguo ^{[1
]}

Hanzic, Lucija ^{[2
]}

Jiang, Guangming ^{[1
,4
]}

机构：

[1] Univ Queensland, Adv Water Management Ctr, Brisbane, Qld, Australia

[2] Univ Queensland, Sch Civil Engn, Brisbane, Qld, Australia

[3] Getty Conservat Inst, Los Angeles, CA USA

[4] Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW, Australia

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 233卷

基金：

澳大利亚研究理事会;

关键词：

Calcium nitrite; Concrete; Sewer; Biofilm; Sulfate resistant cement; FREE NITROUS-ACID; CORROSION-INHIBITING ADMIXTURES; HIGH-PERFORMANCE CONCRETE; SULFIDE-INDUCED CORROSION; REINFORCED-CONCRETE; SULFATE RESISTANCE; METHANE PRODUCTION; BLENDED CEMENTS; CRACK WIDTH; SEWER;

D O I：

10.1016/j.conbuildmat.2019.117341

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

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. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：9

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