Effects of supplementary cementitious materials on properties of cementitious grouts: A review

Generally, grout is a combination of cement, sand, and water (with or without admixtures), which poses low viscosity and high penetrability. Grout is very suitable for anchoring application, jacking of concrete elements, grouting of ducts in prestressing application, application in narrow joints and many more. Nowadays it is used to provide additional strength to load-bearing structures. The grout characteristics includes the flow capacity in narrow space and physical-chemical compatibility with the substrate materials. However, shrinkage, stability, leaching of the grouts, etc. are the main problems of cement grouting. Supplementary cementitious materials (SCMs) such as fly ash, ground granulated blast furnace slag (GGBS), silica fume (SF) etc. can be used as admixtures in cement grout to reduce the problems associated with grout. This paper provides a review on the assessment of the flowability, strength, shrinkage and durability characteristics of the cementitious grouts containing SCMs, and its feasibility in grouting applications. This paper reveals that combination with SCMs in the production of cement-based grouts provides advantages in specific uses in concrete industry.