Self-repairing of polymer-cement concrete

Abstract

Abstract. Self-repairing means ability to the total or partial recovering of the properties which were worsened as a consequence of damage of the material. The subject of the paper is evaluation of ability to self-repair of a cement composite modified with epoxy resin without a hardener. The methodology of investigation of self-repairing building materials, developed by the authors, has been described, with controllable enforcing of the limited weakening of the material. Also, the self-repair degree has been defined as the measure of self-repairing ability of the building composites. The material model of the epoxy-cement composite has been developed on the basis of the tests results. The material optimization of the composite towards the maximum self-repairing ability has also been carried out. The results of investigation have confirmed the possibility of self-repairing of the cement composite modified with the epoxy resin without hardener. The conclusion and further research needs in the range of the self-repairing epoxy-cement composites have been pointed out.

Strength properties and molecular composition of epoxy-modified mortars

“…The author stated that, the properties of epoxy cement mortars without hardener improved fairly when compared to epoxy mortar with hardener. This is due to the cross-linking of an epoxy resin in the environment of Portland cement that have accessibility to react with calcium hydroxide without the presence of hardener [5].…”

Studies on the Microstructure of Epoxy-Cement Composites

“…Ohama and his co-workers have first proposed and demonstrated that this process can proceed inside the cement paste [22], allowing for some specific features of epoxy-cement composites, like ability to partial self-repairing [23].…”

Biological and chemical corrosion of cement materials modified with polymer

“…Therefore, the materials of increased resistance to biocorossion and material and technological solutions facilitating repairs of damaged structures are being sought. Such repair materials may be composites with a cement-polymer matrix [14]. It is important to answer to the question: whether and to which extent these materials are susceptible to microorganism growth and what is the destruction mechanism of the latter?…”