UTILIZATION OF RECYCLED AGGREGATES AND GROUND GRANULATED BLAST-FURNACE SLAG (GGBFS) AS GEOPOLYMER MATERIALS FOR PERVIOUS CONCRETE

• Main Author: Miyazumi Amri, Salsabila
• Format: Theses
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/84232
• Institution: Institut Teknologi Bandung

Road pavements generally create a watertight layer that contributes to decreased groundwater recharge and increased flood frequency in urban areas. Pervious concrete road pavement is a solution in areas prone to flooding and densely populated areas to overcome problems related to watertightness. Since the application of pervious concrete road pavement has low strength and to overcome environmental problems associated with recycled concrete aggregates, this study has used recycled aggregates as a substitute for natural aggregates. The development of green pervious concrete with GGBFS as a substitute for cement is also carried out to overcome environmental problems due to the impact of cement use. Cement production itself emits 38% of the approximately 10 Gt (Giga tons) of carbon dioxide released globally or approximately 450 kg per capita. The purpose of this study was to evaluate several physical and mechanical parameters of pervious concrete made with geopolymers and recycled aggregates in the form of recycled coarse aggregates and recycled fine aggregates. Several physical and mechanical parameters include: compressive strength, density, porosity, permeability, and wear resistance. The efforts made were to vary the test specimens due to the influence of aggregate gradation from recycled aggregates that had previously been crushed, de-mortared, and screened and had been in accordance with material properties testing according to ASTM and SNI and the use of a small percentage of fine aggregate. Evaluation based on the experimental results showed that the results of the compressive strength test at 28 days, the green pervious concrete (GPC) specimen had an average compressive strength of 6-7 MPa so that it could be applied and was generally used in parking lots, pedestrian paths, bicycle paths, and low-volume traffic. Then the use of single size recycled coarse aggregate GPC I mixture with an aggregate size of 4.75-9.5 mm had better compressive strength results than GPC II mixture with an aggregate size of 9.5-19 mm. The use of blended size recycled aggregate, both GPC IV, V, and VI mixtures had uniform compressive strength results. The wear resistance of GPC I and VI specimens had consecutive values with an average of 0.157 mm/minute and 0.061 mm/minute, this value is included in the category of concrete brick quality according to SNI provisions. The porosity values obtained ranged from 17.28-21.64%, the permeability values obtained ranged from 22,824-29,069 mm/s, and the compressive strength ranged from 3.3-13.2 MPa. The experimental results showed that all green pervious concrete specimens produced met the recommended standards of ACI 522R-2010 regarding pervious concrete. In addition, the Scanning Electron Microscope (SEM) test showed visual polymerization products appearing on the test specimens.