Properties of Fly Ash-Cement Cellular Grouts for Sliplining and Backfill Applications

Vipulanandan, C.; Kumar, Mithesh

doi:10.1061/40516(292)14

Cited by 8 publications

(4 citation statements)

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“…For example, it is now accepted that the addition of bentonite causes a reduction in the strength of cement slurries [26] due to reduced exudation and the increase in porosity it causes and for this reason the content of bentonite should be limited to low percentages (2%-5%) [16]. The use of bentonite allows the preparation of suspensions with a wide range of strength values [27] that can even approach 15.0 MPa [28,29] proposed the following equation, with which it is possible to determine the unconfined compressive strength of bentonite-cement slurries as a function of the W/C ratio:…”

Section: Effect Of Additives Presence On Suspensions Strengthmentioning

confidence: 99%

Factors Affecting Cement Suspensions Strength for Soil Formations Improvement – A Review

Dimitrios¹

2023

J Miner Sci Materials

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Grouting is a common technical method with many applications, e.g., it is used for soil stabilization and strengthening, for reduction for water ingress to underground facilities or of the water loss through a dam foundation, etc. Grouts comprise several constituents, which are combined in many ways depending on the in-situ conditions and the outcome desired. The use of very fine cement grouts for injections into fine-to-medium sands has been proposed to circumvent problems associated with the permanence and toxicity of chemical grouts and the inability of ordinary cement grouts to permeate soil formations finer than coarse sand. The strength of a suspension is the property of probably most interest in cases where the main objective of a soak injection program is to improve the mechanical properties of the soil. The object of this paper is to investigate the effect of cement physical properties, water-to-cement ratio, additives and chemical improvers on the strength of cement suspensions.

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Section: Effect Of Additives Presence On Suspensions Strengthmentioning

confidence: 99%

Factors Affecting Cement Suspensions Strength for Soil Formations Improvement – A Review

Dimitrios¹

2023

J Miner Sci Materials

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“…The mechanism of bleeding phenomenon is considered very important, as it provides information on the behavior of cement suspensions at rest in the soil and after the end of an injection [15]. For this reason, the design of the suspensions requires the examination of the phenomenon with emphasis on the determination of the exudation rate and the final exudation rate [9,16]. The rate of exudation refers to the temporal evolution of the phenomenon, while the final percentage of exudation (bleeding capacity or final reduced volume of exudative water) is defined as the volume of water above the sediment, ΔV, at the end of exudation, expressed as a percentage of total initial volume of suspension, Vo.…”

Section: Static Bleedingmentioning

confidence: 99%

“…Several methods have been recorded by which it is possible to maintain the exudation of cement suspensions at satisfactory low levels, in addition to reducing the W/C ratio. The most common of these is the addition of bentonite [14,16,18,25,27,31]. It can be found, however, that this effect of bentonite decreases the higher its content and therefore should not be used at a rate of 4% [32].…”

Section: Static Bleedingmentioning

confidence: 99%

“…According to some researchers, the optimal weight content of bentonite for this purpose is considered equal to 3% [31], while Huang [25] suggests the use of bentonite to reduce bleeding only in cases where the W/C ratio is greater than 0.7:1, due to the large porosity it brings to the mass of the suspension. A similar effect on the exudation of cement suspensions as that of bentonite is caused by the addition of silica fume or fly ash [9,15,16,18].…”

Section: Static Bleedingmentioning

confidence: 99%

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"Properties of Environmentally Friendly Cement Grouts for Soil Improvement - A Mini Review"

Dimitrios

2022

EAES

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Improvement of the mechanical properties and behavior of soils by permeation grouting, using either suspensions or chemical solutions, is frequently required in order to assure the safe construction and operation of many structures. Suspensions have lower cost and are harmless to the environment but cannot be injected into soils with gradations finer than coarse sands. Chemical solutions can be injected in fine sands or coarse silts but are more expensive and, some of them pose a health and environmental hazard. Efforts have been made to extend the injectability range of suspension grouts by developing environmentally friendly materials with very fine gradations. This paper reports on the effect of waterto-cement (W/C) ratio while giving information on the use of additives and chemical improvers in order to improve the suspensions properties such as bleeding and durability.

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Pullout Behaviour of Micropiles Stabilized with Fly Ash

Orekanti¹,

Puram²

2022

Int. J. of Geosynth. and Ground Eng.

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Properties of Fly Ash-Cement Cellular Grouts for Sliplining and Backfill Applications

Cited by 8 publications

References 0 publications

Factors Affecting Cement Suspensions Strength for Soil Formations Improvement – A Review

Factors Affecting Cement Suspensions Strength for Soil Formations Improvement – A Review

"Properties of Environmentally Friendly Cement Grouts for Soil Improvement - A Mini Review"

Pullout Behaviour of Micropiles Stabilized with Fly Ash

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