S.a. Lhoist Recherche Et Developpement

Lhoist Recherche Et Development

Yara International Asa

Lhoist Recherche Et Developpement S.a.

Eurovia Sa

Bernard Laurent

Frédéric Delfosse

Ivan Drouadaine

Deborah Ballard

Galen Kutlubay

Didier Lesueur

Jakub Bujalski

Augustin Querton

Halvor Øien

Tomi Huttunen

Henri PitkÄnen

Robert Lam

The invention concerns the use of an aqueous suspension of solid particles of a calcium/magnesium compound of formula (A): nCa(OH).mCaCO.aMgO.bMg(OH).cMgCO.I as an agent regulating the breaking of a bitumen emulsion. The invention also concerns a bituminous road material obtained by mixing a solid mineral fraction with a cationic bitumen emulsion of the type binder in water, characterised in that it involves adding, to the mineral fraction, an aqueous suspension of solid particles of a calcium/magnesium compound of formula (A). The invention also concerns a method for preparing a material according to the invention and the use of same for producing surface courses, tack coats or temporary surface courses. The invention finally concerns a method for obtaining a tack coat by spreading a cationic bitumen emulsion, comprising a step of applying an aqueous suspension of solid particles of a calcium/magnesium compound of formula (A).

Calcium/magnesium compound slurry for bituminous road material

A process is shown for manufacturing a milk of lime of great fineness which includes at least the steps of providing one lime compound chosen in the group consisting of prehydrated lime, a paste of lime obtained by addition of water to quicklime instead of addition of quicklime to water and their mixture, and forming a milk of slaked lime of great fineness with the chosen lime compound. The paste of lime is obtained by progressive addition of water to quicklime under agitation conditions.

Process for manufacturing a milk of slaked lime of great fineness and milk of great fineness thereby obtained

An aqueous calco-magnesian suspension comprising solid particles fitting the general formula a Ca(OH).b Mg(OH).c MgO in an aqueous phase at a concentration greater than or equal to 200 g/kg, wherein a, b and c represent mass fractions, the sum of which has a value from 90 to 100% and an additive which is simultaneously a viscosity reducer and a viscosity increase moderator, wherein said additive is a phosphonate or a phosphonic acid.

Handleable calco-magnesian suspension

Growing community of inventors

Lustin, Belgium

Bernard Laurent