###### Abstract  
This study experimentally investigated the deformability characteristics of bisphenol A-type epoxy resin-based polymer concrete produced using two types of hardener and four types of filler. In particular, the basic properties of epoxy resin polymer concrete, including the modulus of elasticity, setting shrinkage, and thermal expansion, were experimentally investigated to obtain basic data for evaluating compatibility and dimensional stability. The properties of the epoxy resin polymer concrete were determined when different types of hardener and filler were employed. Differences in deformability can be identified based on these properties. In the present study, the setting shrinkage, coefficient of thermal expansion, and modulus of elasticity were lowest when fly ash was employed as one of the four fillers. Hence, it is advantageous to use fly ash as a repair material for ordinary Portland cement concrete structures. Therefore, the results of this study will be helpful when selecting the types of hardener and filler needed to tailor the epoxy resin polymer concrete produced to be suitable for a particular application.  
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Epoxy (EP) resins, unsaturated polyester resins, vinyl ester resins, and methyl methacrylate monomers are all employed as polymeric binders when PC is produced. Among them, composites using EP have been employed widely for the last several decades as repair materials [2; 11; 12]. Also, EP is one of the most widely used thermosetting polymers due to its remarkably advantageous chemical and mechanical properties [13]. In particular, EP has been used extensively as an adhesive for attaching FRP strips to masonry or concrete supports [14; 15]. However, EP is also employed to produce PC or polymer mortar because of its excellent interfacial adhesion and durability. Hence, PC is popular for use in the repair and rehabilitation of Portland cement concrete structures [16].  
Among the EPs that currently exist, bisphenol A is the most commonly used because it has a superior response with epichlorohydrin and is relatively inexpensive compared to other epoxies [17]. However, the cost is still high, and compatibility issues occur because the properties of the epoxy binder and existing concrete substrate are different. Thus, the consumption rate of PC has not increased as was once expected [2; 18].  
Important properties related to compatibility and dimensional stability include mechanical elements, thermal suitability associated with the coefficient of thermal expansion, modulus of elasticity, creep resistance, rate of strength development, and various curing conditions [19]. Factors affecting compatibility include the type and contents of the EP (i.e., binder), type of filler, use of reinforcing materials such as fiber, and cast and curing temperatures.  
Therefore, to consider various conditions associated with the properties of the epoxy resin polymer concrete examined in this study, the present research experimentally investigated the deformability of epoxy resin polymer concrete prepared using bisphenol A epoxy, two types of hardeners, and four different types of fillers.