Modified Contact Grouting Services
Modified Contact Grouting (MCG) is a relatively new grouting technique. MCG utilizes the systems which are installed to divert water away from cast-in-place (CIP) installations to deliver grout to rock mass discontinuities, thus, essentially combining the contact grouting and consolidation grouting processes. The technique can generally be used on any structure for which contact grouting can be applied. Generally, MCG is done when either schedule limitations prevent full contact and consolidation grouting programs from being undertaken or where both programs can be undertaken but there is a desire for greater water infiltration reduction than typical industry standards.
MCG does not vary significantly from contact grouting in the processes, equipment, or materials used. It is based on slight modifications to the CIP installation and contact grouting program which allow grout to be more effectively delivered to voids behind the CIP structure and to rock mass discontinuities.
MCG does require a high degree of cooperation between all parties associated with a project. A successful MCG program requires planning for the program to begin well in advance of the grouting program as numerous elements of the CIP placement process are utilized in the grouting process.