การหล่อแข็งกากตะกอนชุบโลหะโดยการกระตุ้นวัสดุยึดประสานประเภทปูนขาวและขี้เถ้าแกลบด้วยสารเคมี

Solidification of the Plating Sludge Using Chemical Activation of Lime and Rice Husk Ash Cement

Name: จิตตินี เจริญจิตต์

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Solidification

; Lime

; Rice Husk Ash

; Sodium Silicate

; Sodium Carbonate

; Compressive

; Strength

; Setting Time

; Leaching

Abstract: This research investigated the solidification processes using lime and rice husk ash (RHA) assolidification binder at ratio of 45:55, 55:45 and 65:35. Sodium silicate (Na2SiO3), sodium carbonate(Na2CO3) and ordinary Portland cement (OPC) were used as activator at 0, 2, 4, 6 and 8%. The strengthresult showed that the ratio between lime and RHA of 45:55 with 8% sodium silicate and sodiumcarbonate have higher rate of strength development than other proportions during 28 days of curing.When the zinc-cyanide plating sludge was added to the cement mixes at 10, 20 and 30 wt.%, the 28-daystrength of the solidified wastes containing 10 wt.% plating sludge with 8% sodium silicate and sodiumcarbonate was 111.6 and 60.5 kg/cm2, respectively. It was found that the 28-day strength of the mixescontaining 20 wt.% plating sludge with 8% sodium silicate and the mixes containing 30 wt.% platingsludge with 8% sodium carbonate did not meet the minimum requirement for landfilling. Setting resultsshowed that when the amount of the plating sludge increased, the initial setting decreased but the finalsetting increased. In addition, zinc concentration in the TCLP leachates from the samples containing 20and 30 wt.% plating sludge with 8% sodium silicate and the samples containing 30 wt.% plating sludgewith 8% sodium carbonate and curing for 56 and 91 days higher than the standard limit.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: ผศ.ดร. สุวิมล อัศวพิศิษฐ

Role: อาจารย์ที่ปรึกษา

Created: 2546

Issued: 2005-09-19

Modified: 2006-05-10

ISBN: 9741833717

CallNumber: EV404

tha

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Environmental Technology

Grantor: King Mongkut's University of Technology Thonburi

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