Course Summary & Description:
This course reviews the construction project application of chemical grouts by providing technical information and guidance for the investigation, selection of materials and equipment, and construction methods of chemical grouting applications.
Chemical grouting is the process of injecting a chemically reactive solution that behaves as a fluid but reacts after a predetermined time to form a solid, semi-solid, or gel. The primary objective of chemical grouting is to provide additional strength and control water flows in geologic units where the pore sizes of the rock or soil mass were too small to allow the introduction of conventional portland-cement suspensions. This course has been developed to provide guidance to the consulting engineer regarding the use of chemical grouting as a tool in remediation and repair work under and around deteriorated or damaged structures.
The goal of this course is to provide the engineer with a clear understanding of the chemical and mechanical factors affecting the selection of a chemical grouting system. A general discussion on viscosity, gel time, sensitivity, toxicity, durability, and strength of chemical grouting materials and their applications in construction are discussed. Emphasis is placed on sodium silicate, acrylate, urethanes, lignins, and resin chemical grouting systems. Limitations of chemical grouting are also discussed in relation to field operations and methods, along with factors affecting selection in the early planning stages. The course will provide the reader with a clear understanding of the chemical grouting process and its application in hydraulic structures.