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A Mechanism for the Production of Ultrafine Particles from Concrete Fracture

Jabbour, N, Jayaratne, ER, Johnson, GR, Alroe, J, Uhde, E, Salthammer, T, Cravigan, L, Faghihi, EM, Kumar, Prashant and Morawska, L (2017) A Mechanism for the Production of Ultrafine Particles from Concrete Fracture Environmental Pollution, 222. pp. 175-181.

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Abstract

While the crushing of concrete gives rise to large quantities of coarse dust, it is not widely recognized that this process also emits significant quantities of ultrafine particles. These particles impact not just the environments within construction activities but those in entire urban areas. The origin of these ultrafine particles is uncertain, as existing theories do not support their production by mechanical processes. We propose a hypothesis for this observation based on the volatilisation of materials at the concrete fracture interface. The results from this study confirm that mechanical methods can produce ultrafine particles (UFP) from concrete, and that the particles are volatile. The ultrafine mode was only observed during concrete fracture, producing particle size distributions with average count median diameters of 27, 39 and 49 nm for the three tested concrete samples. Further volatility measurements found that the particles were highly volatile, showing between 60 and 95% reduction in the volume fraction remaining by 125 °C. An analysis of the volatile fraction remaining found that different volatile material is responsible for the production of particles between the samples.

Item Type: Article
Subjects : Civil & Environmental Engineering
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Jabbour, NUNSPECIFIEDUNSPECIFIED
Jayaratne, ERUNSPECIFIEDUNSPECIFIED
Johnson, GRUNSPECIFIEDUNSPECIFIED
Alroe, JUNSPECIFIEDUNSPECIFIED
Uhde, EUNSPECIFIEDUNSPECIFIED
Salthammer, TUNSPECIFIEDUNSPECIFIED
Cravigan, LUNSPECIFIEDUNSPECIFIED
Faghihi, EMUNSPECIFIEDUNSPECIFIED
Kumar, PrashantP.Kumar@surrey.ac.ukUNSPECIFIED
Morawska, LUNSPECIFIEDUNSPECIFIED
Date : 6 January 2017
Identification Number : 10.1016/j.envpol.2016.12.059
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Ultrafine particles; Concrete; Secondary particles; Airborne dust; Urban pollution
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 10 Jan 2017 19:00
Last Modified : 07 Jul 2017 11:08
URI: http://epubs.surrey.ac.uk/id/eprint/813260

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