Mechanical Properties and DuraMechanical Properties and Durability of Self-compacting Mortar Incorporating Printed Circuit Board Waste and Fly Ashbility of Self-compacting Mortar incorporating Printed Circuit Board Waste and Fly Ash

Abstract

The purpose of this research was to study the effects on mechanical properties and durability from sulfuric acid corrosion conditions, when waste from printed circuit boards and fly ash are mixed in the production of self-compacting mortar. In the design of the mortar mixture, fly ash was used to replace Type 1 Portland cement in the ratio of 20 percent by weight and printed circuit board waste was added as the binder in the ratio of 5, 10, 15, and 20 by weight of binder. The water to binder ratio was 0.47. The spreading distance of self-compacting mortar was fixed for all mixtures in the range of 255 cm. The flowability, compressive strength, flexural strength, water absorption and durability from corrosive conditions of sulfuric acid at the maximum curing time of 90 days. The test results showed that the flowability of self-compacting mortar tended to decrease with the amount of printed circuit boards waste in the mix increase. While compressive strength, flexural strength, water absorption and durability due to sulfuric acid corrosion tends to increase with the amount of printed circuit boards waste in the mix increase. The self-compacting mortar incorporation printed circuit boards in the appropriate amount should not exceed 15 percent, with compressive and flexural strengths of 38.25 and 8.23 MPa, while the percentage of water absorption and Loss of compressive strength from sulfuric acid corrosion was 7.06 and 55.05, respectively.