(อิทธิพลขนาดคละของมวลรวมที่ส่งผลต่อกำลังรับแรงอัดและการชะละลายโลหะหนักของคอนกรีตมวลเบาผสมเศษของเสียเมลามีน)(Influence of Aggregate Fineness Modulus on Compressive Strength and Heavy Metal Leaching of Lightweight Concrete Containing Recycled Melamine Waste)

Authors

  • ชัชพิมุข พรหมโชติ School of Mechanical and Process System Engineering, Institute of Engineering, Suranaree University of Technology.
  • พรพรรณ เฉิดฉาย School of Mechanical and Process System Engineering, Institute of Engineering, Suranaree University of Technology.
  • เฉลิมชัย ไชยธงรัตน์ School of Mechanical and Automotive Engineering Technology, Faculty of Engineering and Technology, King Mongkut’s University of Technology North Bangkok.
  • กัญชลา สุดตาชาติ School of Manufacturing Engineering, Institute of Engineering, Suranaree University of Technology
  • สมศักดิ์ ศิวดำรงพงศ์ School of Manufacturing Engineering, Institute of Engineering, Suranaree University of Technology

Keywords:

Fineness modulus, Leaching, Heavy metal, Lightweight concrete, Melamine waste

Abstract

This research aimed to investigate influence of aggregate fineness modulus on mechanical properties of cellular lightweight concrete containing melamine waste as fine aggregate. Melamine waste was used to partially replace sand at the rate of 25% by weight. The mixed ratio of cement: aggregate: water was set at 1:1:0.5 by weight. Density of fresh concrete was controlled at 1,300 kg/m3. The concrete specimens were varied by fineness modulus (FM) of the waste at FM1.25, FM1.0, FM0.75 and FM0.5. Compressive strength, water absorption and leaching test of heavy metal were investigated. The result was found that the melamine waste mixing yielded higher compressive strength and water absorption compared to reference lightweight concrete. The FM0.75 specimen resulted the highest compressive strength. It was also found that water absorption was slightly decrease with increasing fineness modulus of the waste.  The leaching of heavy metals were determined by following the Toxicity Characteristic Leaching Procedure (TCLP). It was found that the concentration of As, Cd, and Pb were not exceed the limitation specified by the U.S.EPA and Ministry of Industry Announcement No. 6 (1997)

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Published

2019-04-02

Issue

Vol. 15 No. 1 (2019): ๋JANUARY-APRIL 2019

Section

บทความวิจัย (Research article)

License

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