Development of epoxy-modified mortars and concretes without hardener

This study is concerned with the development of epoxy-modified mortars and concretes without hardener.; The research was carried out by studying the various properties and qualities of hardeners and resins used with various cement mortars and concretes. Until now the use of a hardener has been considered indispensable for epoxy modification in ordinary cement mortars and concretes. In conventional epoxy-modified mortars and concretes, proper hardener has been used for the hardening of the epoxy resin. It has also been indicated that a high polymer-cement ratio is necessary to make the most of the excellent properties of the epoxy resin in epoxy modified mortars and concretes with the hardener compared with polymer-modified mortars and concretes using polymer latex and emulsion. This leads the epoxy modified mortars and concretes with the hardener to a bad balance between their performance and cost. Through this study the author found that the hardening of the epoxy resin, even without any hardener, can progress by ring-opening reaction in the presence of the alkalies produced by the hydration of cement in the epoxy-modified mortars and concretes without the hardener.; It was concluded that epoxy-modified mortars and concretes without the use of hardener can be used as repair and finishing materials for reinforced concrete structures in comparison to conventional epoxy-modified mortars and concretes with hardener. It was also concluded that this showed excellent physical properties and durability, good balance between performance and cost and that there would be new applications for this in the field of polymer-modified mortars and concretes.