One-Dimensional Consolidation of Sedimented Stowed Pond Ash

被引：9

作者：

Mishra, Devi Prasad ^{[1
]}

Das, Samir Kumar ^{[2
]}

机构：

[1] Department of Mining Engineering, Indian School of Mines, Dhanbad 826 004, Jharkhand

[2] Department of Mining Engineering, Indian Institute of Technology, Kharagpur 721 302, West Bengal

来源：

Geotechnical and Geological Engineering | 2012年 / 30卷 / 04期

关键词：

Consolidation; Consolidometer; Fly ash; Pond ash; Settlement; Stowing;

D O I：

10.1007/s10706-011-9486-x

中图分类号：

学科分类号：

摘要：

Use of fly ash locked in the ash ponds in geotechnical applications such as stowing or backfilling of the mines is an attractive alternative to solve the disposal problem. Before it is used as a stowing or backfilling material, the response of the fly ash to imposed load must be determined in order to assess its load taking ability. The present study examines the effect of time and incremental load on the consolidation characteristics of the sedimented stowed pond ash using a fixed ring consolidometer. The important parameters, viz. rate of settlement, consolidation coefficients and void ratio, etc. of the hydraulically stowed pond ash collected after 7, 14, 21, 28 and 35 days of stowing under step incremental loads are determined. The study revealed that 60.42-84.87% settlement of the sedimented stowed pond ash takes place in the initial 1 min of the loading. In addition, it is observed that the coefficient of consolidation of the sedimented stowed pond ash, which varies in the range of 0.0195-0.1882 cm 2/min, is comparatively low and decreases with the increment of applied load and time. This indicates that the structures lying above the stowed pond ash mass will undergo gradual settling and not suffer large deformation. © 2011 Springer Science+Business Media B.V.

引用

页码：685 / 695

页数：10

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