Recycled Aggregate Mortar Content and Composition Using Handheld X-Ray Fluorescence

被引：1

作者：

Dey, Arindam ^{[1
]}

Cavalline, Tara L.

Mamirov, Miras ^{[2
]}

Hu, Jiong ^{[3
]}

机构：

[1] UNC Charlotte, Dept Elementary Educ, Charlotte, NC USA

[2] Univ NE Lincoln, Lincoln, NE 68588 USA

[3] Univ Nebraska Lincoln, Dept Civil & Environm Engn, Lincoln, NE 68583 USA

来源：

ACI MATERIALS JOURNAL | 2023年 / 120卷 / 05期

关键词：

chemical composition; recycled concrete aggregate (RCA); residual mortar; X-ray fluorescence; CHEMICAL-MINERALOGICAL CHARACTERIZATION; QUANTIFICATION; PERFORMANCE;

D O I：

10.14359/51738890

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The use of recycled concrete aggregates (RCAs) in lieu of natural aggregates improves the sustainability of the built environment. Barriers to the use of RCA include its variable composition, including the residual mortar content (RMC), chemical composi-tion, and its potential to contain contaminants, which can nega-tively affect the properties of concrete or present environmental concerns. In this study, a rapid, economical method to estimate the RMC and provide the chemical characterization of RCA was developed using a portable handheld X-ray fluorescence (PHXRF) device. Models were developed using reference tests (RMC test based on the thermal shock method and chemical composition from whole-rock analysis) to correlate PHXRF results to measured values. The PHXRF shows strong potential for estimating the RMC and chemical composition of RCA. Paired with locally calibrated reference samples, the test method could be used in laboratory or field applications to characterize RCA and increase its use in bound and unbound applications.

引用

页数：122

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