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  5. Soft limestone aggregates – Enhanced performance

Article | REF: C5445 V1

Slaked lime - Applications in civil engineering

Authors: Gontran HERRIER, Didier LESUEUR, Daniel PUIATTI

Publication date: February 10, 2011

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5. Soft limestone aggregates – Enhanced performance

This application was originally developed on the basis of tests on limestone materials from the Paris region with average to low aggregate performances (Los Angeles between 28 and 48, Micro-Deval Humide between 25 and 72).

Laboratory studies have shown that lime treatment leads to carbonation reactions that progressively improve the mechanical properties of soft limestone materials. After one year, limestones treated with 1% quicklime all showed moduli of elasticity in excess of 5,000 MPa and significant tensile strengths (0.13 to 0.19 MPa).

Example

These results were confirmed by comparative tests on the base course of departmental roadways using three soft limestones, untreated on the one hand, and treated with 1% quicklime on the other (figure

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Soft limestone aggregates – Enhanced performance
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