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LEACHATE CHARACTERISTICS OF FLY ASH STABILIZED WITH LIME SLUDGE.
| 题名： | LEACHATE CHARACTERISTICS OF FLY ASH STABILIZED WITH LIME SLUDGE. |
| 作者： | Gabr-MA; Boury-EM; Bowders-JJ |
| 关键词： | LIME-FLY-ASH; GROUT-; LEACHATES-; HYDRAULIC-CONDUCTIVITY; EFFLUENTS-; ALKALINITY-; IRON-; MANGANESE-; ALUMINIUM-; PH-VALUE |
| 摘要： | Development of a particulate permeation grout consisting of fly ash and acid mine drainage (AMD) treatment sludge was investigated. Results indicated that a mix consisting of 50% AMD sludge solids and 50% fly ash had the best characteristics with regard to flow reduction and pozzolan content. The measured hydraulic conductivity of the grout increased with increasing fly ash content and was on the order of 0.00002 to 700,000 cm/sec. Effluent analysis indicated total alkalinity values, measured as CaCO3, in the range of 12 to 97 mg/L. Total iron and manganese were typically less than 1 mg/L for the remainder of the test period for all grout mix ratios. The aluminum concentration ranged from 1 to 1.8 mg/L and began to rise slowly as the testing proceeded. The highest value reached was between 3.6 and 4.0. The increases in aluminum concentrations closely followed the noted increases in alkalinity and pH. Results from bench scale testing indicated that grouting provided one to two orders of magnitude reduction in the hydraulic conductivity. This reduction was achieved by grouting 59 to 64% of the voids. Effluent analysis from the bench scale testing indicated a pH of 8.6 to 8.9 and iron, manganese, and aluminum of less than 1 mg/L for all samples collected during the testing period of approximately 2 months. |
| 总页数： | Transportation Research Record. 1995. (1486) pp13-20 (6 Fig., 8 Tab., 13 Ref.) |
| 报告类型： | 科技报告 |
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