Policy Position

Mouillet, V., Séjourné, D., Delmotte, V., Ritter, H. J., & Lesueur, D. (2014). Method of quantification of hydrated lime in asphalt mixtures.

Sep 01, 2023


Hydrated lime has been known as an additive for asphalt mixtures for a long time and is now considered as an additive that increases asphalt mixture durability. It has been extensively used in the past 40 years in the USA, and is being increasingly used in most European countries, in particular Austria, France, the Netherlands, the United Kingdom and Switzerland.

Given this context, it is necessary to have a fast and reliable quantification method of the hydrated lime content in an asphalt mixture. A German method was used in order to do so. The test method consisted first in recovering the filler from the asphalt mixture using the usual solvent extraction method (EN 12697-1). Then, 1 g of the recovered filler was titrated with a 0.5 M HCl solution using a method adapted from EN 459-2.The test method was validated on an AC 10 mixture manufactured in the laboratory. The nominal content was 2.0% hydrated lime based on the dry aggregate. The measured content was found to be 1.7%, in reasonable agreement with expected results.

As a result, the hydrated lime content in an asphalt mixture can be evaluated. An estimate of the precision of the method is also given thanks to an international round robin test, showing that the repeatability of the method is close to 0.7% and its reproducibility 4.5% in terms of Ca(OH) 2 content in the recovered filler.

The paper, by V. Mouillet, D. Séjourné, V. Delmotte, H.-J. Ritter, and D. Lesueur, has been published in the Construction and Building Materials journal, (volume 68), on 15 October 2014 (Pages 348–354).

You can access and download the paper on Science Direct: (http://www.sciencedirect.com/science/article/pii/S0950061814006825).

Latest News & Events

EuLA's 2024-2029 Manifesto

May 13, 2024
Brussels, Belgium- May 2024, European Lime Association Sets Course for the Future with a Manifesto f...

EuLA Convenes Roundtable Discussion on Lime in Soil Treatment Applications

Mar 14, 2024
Brussels, Belgium – March 14, 2024 – The European Lime Association (EuLA) hosted a succe...

EuLA has signed the Antwerp Declaration

Feb 21, 2024
On 20 Feb 2024, 73 European industry leaders across almost 15 sectors (including EuLA) have presente...

EuLA Co-Signed a Joint-Letter Together With Other 23 Stakeholders

Nov 10, 2023
Urgent Call for Action: Ensure the Net Zero Industry Act CO2 Storage Injection Capacity Target prote...

The European Lime Association Elects New Board President and Board Members

Aug 31, 2023
European Lime Association, the leading advocacy and representative body for the Lime Industry across...

EuLA’s feedback on the European Commission’s public consultation on the Net-Zero Industry Act

Jun 27, 2023
The European Commission published the Net Zero Industry Act (NZIA) as a key element of the Green Dea...