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8. Reinforcement of soft floors and deformable substrates
The injection technique is well known. It consists of injecting a grout from above, the formulation, injection pressure and quantity of which depend on the nature of the soil and the problem to be treated: reduction of porosity, reinforcement of mechanical performance, etc.
Lime, in its hydrated form, is used in the composition of some of these grouts, in the same way as cements or fly ash.
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When you want to clean up an area that's too damp, you can also use quicklime wells, which draw excess water from the soil to hydrate.
Example
A number of projects have been carried out using wells with diameters of 10 to 15 cm, spaced 50 to 70 cm apart and 1 m deep, under a railroad line, and 7 m deep...
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Reinforcement of soft floors and deformable substrates
Modification of asphalt mixes
Bibliography
Standards and norms
- Chaux de construction. - AFNOR NF EN 459 -
- Tests to determine the mechanical and physical properties of aggregates – Determination of the porosity of dry compacted filler. - AFNOR NF EN 1097-4 - 06/2008
- Sol traité à la chaux. - AFNOR NF EN 1227-11 -
- Essai d'évaluation de l'aptitude d'un sol au traitement. - AFNOR NF P 94-100 -
- Bituminous mixes – Test methods for hot hydrocarbon mixes...
Directories
Organizations – Federations – Associations (non-exhaustive list)
• UP Chaux – Union of lime producers
• National Lime Association (USA)
• IMA Europe – Industrial Minerals Association...
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