Use of Recycled Coarse Aggregate in Concrete f'c=210 kg/cm2 when Incorporating Percentages of Recycled Coarse Aggregate (#761)

Authors

Alva Sarmiento, Anita Elizabet

Castillo Marín, Arbin Jhon

Tacilla Culqui, Crhistian Yerson

Abstract

The purpose of this work was to determine the compressive strength of concrete f'c=210 kg/cm² replacing three percentages of recycled coarse aggregate (50%, 75% and 100%), using mix design methods: Walker and ACI, natural aggregates from the Tar Tar – Baños del Inca quarry were used, and recycled concrete blocks were collected from the clearing located on the Otuzco-Cajamarca highway. This research is of experimental design, with a quantitative approach due to data collection and analysis. It began by determining the physical and mechanical properties of the aggregates, verifying that it is within the parameters established by the NTP 400.037 standard, continuing with dosing based on the design methods, for a sample of 96 specimens adding 50%, 75 % and 100% recycled concrete, at the curing ages of 7, 14 and 28 days. From this, the compressive strength of the samples was evaluated, 48 for each mixture design method, with the two methods exceeding the design resistance f'c=210 kg/cm2 by adding 50% of recycled material. , the hypothesis of this study being feasible, it is important to mention that the Walker method presents better results where an average maximum resistance was reached after 28 days of 250.90 kg/cm² with natural aggregate, 220.44 kg/cm² for 50%, 194.43 kg /cm² for 75% and 187.94 kg/cm² for 100%..