## 1 Introduction
It also has the advantage of excellent construction ability [24]. Roller-compacted concrete (RCC) has low mobility. RCC refers to concrete for which compacting is performed with external vibrators, such as vibration rollers, because it does not have the consistency required of general concrete [24; 25; 26; 27]. Roller-compacted concrete pavements (RCCPs) facilitate rapid, consecutive construction and wide construction boundaries. Thus, RCC techniques have higher economic feasibility than general concrete engineering methods [24; 25; 26; 27]. Compared with general concrete pavements, RCCPs are stronger as they have lower water-to-cement ratios, with minimal contraction crack formation from moisture evaporation. Thus, in the long term, RCC materials provide the advantage of increased durability [24; 25; 26; 27]. Currently, the latex-modified rapid-hardening-cement concrete used in repairs contains 15% latex (15% of the cement weight) [6; 12; 15]. The use of 15% latex is difficult to apply to roller-compacted concrete with requirements of low slump. Therefore, the use of latex should be reduced. In this regard, the use of less latex would be desirable. However, given the advantages of latex, this would require new methods and materials to achieve the desired performance from the repair concrete. The addition of reinforcement fibers distributes the fibers in random directions inside the concrete so that the concrete's crack control ability may be improved [16; 17; 18]. Fiber-reinforced concrete also enhances the brittle properties of the concrete and improves ductile performance, preventing crack generation and growth [19; 20; 21; 22; 23]. The degree of the increase in crack control capacity attributable to fiber reinforcement of concrete is determined by the bonding mechanism between the fibers and the concrete, including fiber bridging, fiber de-bonding, fiber pullout and fiber fracture when cracks occur [16; 17; 18; 19; 20; 21; 22; 23]. The bond characteristics are influenced by a variety of factors, such as the morphological shape and length of the reinforcing fiber, the surface property, the interface between the concrete and the reinforcing fiber in addition to the strength of the concrete [22; 23]. In general, there are two approaches to improve the bonding characteristics of the fiber [16; 17; 22; 23]. The first is mechanical improvement using fibers having crimped, hooked and twisted shapes [16; 22; 23]. The second is chemical treatment to improve the hydrophilicity of the fiber surface and thereby, improve compatibility with the concrete [16; 17; 18; 19; 20; 21; 22; 23]. As reinforcement fibers, mixed polyolefin macro synthetic fibers, natural Jute fibers and PVA (polyvinyl alcohol) fibers were evaluated in terms of mechanical characteristics, chloride ion penetration properties and durability. Jute and PVA fibers are hydrophilic fibers and have excellent bonding strength with concrete [16]. Furthermore, the macro fibers are hydrophobic fibers, but the surface shape is treated as a crimp type in order to improve the bonding characteristics [22; 23]. Therefore, PVA, jute and macro synthetic fibers are excellent in terms of bonding strength with concrete, which increases the control effect of cracks occurring in concrete. Therefore, they are effective in improving durability, including permeability of concrete. Such an effect can sufficiently solve the reduction in permeability and durability due to a reduction in latex usage. The study evaluated the performance of roller-compacted latex-modified fiber-reinforced rapid-hardening-cement concrete (RCLMFRRHCC) for repairing road pavement. When the amount of latex used was reduced from 15% to 5%, the effectiveness of the types of reinforcing fibers to maintain or improve the target performance while securing a slump capable of roller compaction was evaluated. In addition, the effect of fiber type on abrasion and impact resistance were evaluated.