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Received Aug 22, 2017; Accepted Oct 29, 2017
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1. Introduction
The repair of deteriorated concrete pavements, using roller-compacted latex-modified rapid-hardening cement concrete, has been studied recently [1]. A roller-compacted concrete (RCC) is a concrete with low fluidity [2–6]. RCC does not require a consistency for compacting, and it must be compacted with an external vibrator, such as a vibration roller or a vibration pressure tamper [2]. Roller-compacted concrete pavement (RCCP) offers a fast, successive construction and use of a wide range of construction equipment; thus, it has higher economic feasibility than other concrete pavements [2–6]. Compared with a general concrete pavement, RCCP has a lower water-to-cement (W/C) ratio [2]. A lower W/C ratio has the effect of increasing the strength of concrete, and it may reduce the risk of contraction cracks due to moisture evaporation [2–6]. Thus, RCCP also has the advantage of increased durability of pavement over the long term [2–6]. When RCC and latex are used with rapid-hardening cement for a concrete pavement, it is possible to achieve both easy construction and durability [1]. Currently, roller-compacted rapid-hardening cement concrete pavement uses up to 15% latex [1]. The use of latex up to 15% may delay the concrete’s initial strength development. As such, it may be difficult to secure sufficient initial target strength [7, 8]. Economically, the overall concrete pavement repair is more costly due to the high latex amounts. The latex-modified rapid-hardening cement offers superior workability, crack resistance, and durability compared to the general rapid-hardening cement concrete [8–15], but it has the problems of initial strength development delay and lower economic feasibility. Also, the increase in initial fluidity makes roller compaction difficult because latex-modified fiber-reinforced roller-compacted rapid-hardening cement concrete (LMFRCRSC) uses a mix that has low slump, due to the characteristics of RCC.
In the previous study [16], the performance of LMFRCRSC according to the type of fiber reinforcement was evaluated. The possibility of the roller compaction method was evaluated by measuring the slump value according to the type of fiber reinforcement. Mechanical properties such as compressive strength and flexural strength were evaluated,...