Which of the following best describes grout in the context of a tremie pipe?

In the context of a tremie pipe, grout is a mixture used to seal boreholes. Grouting serves a critical purpose in construction and civil engineering, especially in underwater or deep foundation work. It consists of a cementitious material mixed with water that can be pumped into the borehole through the tremie pipe. This process helps fill voids and stabilizes the formation around piles or other structural elements.

Using grout in this manner ensures that the intended structures are properly anchored and reduces the risk of water ingress or soil erosion, which could compromise the integrity of the project. This sealing capability is essential, particularly in cases where the borehole is submerged underwater, as the tremie pipe allows for the controlled placement of grout without contamination or loss of material in the surrounding environment. Thus, the role of grout as a sealing mixture is fundamental to the effectiveness of the tremie pipe in construction applications.