A NEW DRILLING TECHNIQUE: SELF-HARDENING MUD

UN NOUVEAU STYLE DE PERFORMATION: LA BOUE AUTODURCISSABLE

Since 1950 a drilling method has been used which does not require the utilization of casings: the stability of the hole is ensured by the counter-pressure exerted by a bentonite mud. A more recent and simpler technique offers new openings (jointless walls, composite walls, lightweight supports); this is a drilling method which uses self-hardening mud similar in composition to a conventional injection grout (water, cement, bentonite). This grout plays a double role; it is a drilling fluid when fresh, and is used as waterproofing or foundation when hardened. In order to fulfil this double role, the mix design of the grout must be determined with great accuracy and the nature of the ingredients must not be left to chance. The addition of some retarders or plasticizers allows for greater safety. This article is a state of the art report of self-hardening muds and makes special mention of the determination of the characteristics of the grout at the hardened stage. /TRRL/

  • Corporate Authors:

    Societe de Diffusion de Tech du Bat et de Trav Pub

    9 rue la Perouse
    Paris 16e,   France 
  • Authors:
    • Caron, C
  • Publication Date: 1973-11

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00130669
  • Record Type: Publication
  • Source Agency: Central and Regional Labs of Bridges & Highways,Fr
  • Files: ITRD, TRIS
  • Created Date: Apr 7 1976 12:00AM