INVESTIGATIONS OF A PLASTIC REINJECTABLE GROUT VALVE FOR USE IN BUREAU STRUCTURES,
Abstract
A laboratory investigation was conducted to determine the operational characteristics of a plastic reinjectable grout valve and determine its applicability for use in future e Bureauu structures. Large heaavily reinforced concrete blocks were fabricated with the grout valves embedded adjacent to one edge then bolted together to form a joint comparable to those found between blocks of a dam. Tests were conducted by pumping cement grouts with different water to cement ratios into the variable width joint between blocks. Grout valve conditions also were varied. Results of tests indicated that operation of this valve is somewhat unpredictable with regard to the pressures needed to open it and its resealing capabilities. A thin layer of original grout frequently remained between the rubber plug and the conical plastic fitting causing secondary opening and resealing to be more difficult and inconsistent. The grout valve was modified with a strap over the rubber plug portion and resulted in a more consistent operation and one independent of the joint opening.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1964
- Accession Number
- AD0606212
Entities
People
- J. R. Graham
Organizations
- United States Bureau of Reclamation