Cold Recycling of Reclaimed Asphalt Pavement Using Cement Admixture

Over the past two decades, Cold Recycling (CR) technology has been widely implemented in many countries worldwide. Compared to hot recycling technology, CR offers numerous benefits regarding environmental impact, construction techniques, safety, engineering, and economics. In Vietnam, the budget allocated for road maintenance only covers 30–40% of the demand. Adopting cold recycled asphalt pavement technology in Vietnam can reduce costs by 15–20% compared to new construction, thereby addressing 60% of the remaining road maintenance work in Vietnam. Nevertheless, applying cold recycling technology requires careful attention to technical issues such as materials, recycling processes, and mix design. This paper reports the outcomes of utilizing Cold In-Place Recycling (CIR) technology with cement in Vietnam. Besides, the optimum cement content in the mixture following cold recycling technology was selected based on three criteria: bulk density, compressive, and splitting tensile strength.