Difference between Epoxy Grout, Cement Grout and Cement Mortar

Difference between Epoxy Grout,Cement Grout and Cement Mortar

Epoxy grout consists of epoxy resin, epoxy hardener and sand/aggregates. In fact, there are various types of resin used in construction industry like epoxy, polyester, polyurethane etc.Though epoxy grout appears to imply the presence of cement material by its name, it does not contain  any  cement  at  all.  On the other hand,  epoxy  hardener serves  to  initiate  the hardening process of epoxy  grout.  It is commonly used for repairing hairline cracks and cavities in concrete structures and can be adopted as primer or bonding agent.

Cement grout is formed by mixing cement powder with water in which the ratio of cement of water is more or less similar to that of concrete. Setting and hardening are the important processes which affect  the  performance  of  cement  grout.  Moreover,  the  presence  of excessive  voids  would  also  affect  the  strength, stiffness  and  permeability  of  grout.  It  is versatile in application of filling voids and gaps in structures.

Cement mortar is normally a mixture of cement, water and sand. They are used as bedding for concrete kerbs in roadwork.

Type of bar reinforcement is more corrosion resistant, epoxy-coated bars,stainless steel bars or galvanized bars.Based on the experiment conducted by the Building Research Establishment, it was show that the corrosion resistance of galvanized steel was the worst among the three types of bar reinforcement. For galvanized steel bars, corrosion started to occur when a certain chloride content in concrete (i.e. 0.4% by cement weight) was exceeded. However, for epoxy-coated bars, they extended the time taken for cracking to occur when compared with galvanized steel bars.

The  best  corrosion  resistant  reinforcement  among  all  is  stainless  steel.  In  particular, austenitic  stainless  steel  stayed  uncorroded  even  there  was  chloride  contamination  in concrete in the experiment.