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Processed Coarse Aggregate as Base Course in Concrete Roads

Author: 
Dr. Dioscoro Y. Mancao, Jr
Subject Area: 
Physical Sciences and Engineering
Abstract: 

The study aimed to utilize the waste crushed concrete pavement as recycled or processed coarse aggregate for base course in concrete roads. Specifically, it aimed to determine the physical properties of the processed aggregate derived from waste crushed concrete pavement in terms of gradation, abrasion loss, Atterberg’s Limits, Compaction test, California Bearing Ratio and Field Density Test. The study used the 65%/35% and the 50%/50% processed aggregate – natural aggregate proportioning and compared their physical properties with the natural aggregates in terms of the aforementioned parameters using ANOVA. A cost analysis was also conducted to determine the feasibility of the study. The 100 percent processed waste crushed concrete pavement aggregate passed the Particle size analysis test but failed in the Abrasion test. The 65 percent processed waste crushed concrete pavement aggregate blended with the 35 percent natural Daguitan aggregate y weight passed all the tests except the California Bearing Ratio test. The 50 percent processed waste crushed pavement aggregate blended with the 50 percent natural Daguitan aggregate by weight passed all the laboratory tests required of Item 201 (Base Course) materials. It can therefore be utilized as coarse aggregate for base course. The cost of obtaining one cubic meter of natural base course material is P850.00/cubic meter which is obviously more expensive than the processed aggregate which will cost only P600.00/cubic meter to process.

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