A simple method for preparing super-hydrophobic powder from paper sludge ash

Spathi, Charikleia; Young, Neale; Heng, Jerry Y. Y.; Vandeperre, Luc; Cheeseman, Christopher

doi:10.1016/j.matlet.2014.11.123

Cited by 52 publications

(36 citation statements)

References 11 publications

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“…addition of stearic acid (Sigma Aldrich, 95% purity) as a surface functionalising agent. This was the optimum processing conditions and produced a hydrophobic powder [22]. Dry milling was carried out using a 3 litre porcelain ball mill containing 19 mm diameter high density alumina milling media.…”

Section: Methodsmentioning

confidence: 99%

“…Recent research has demonstrated that PSA can be transformed into a super-hydrophobic powder using simple, low-cost processing, involving dry milling with stearic acid which acts as a surface functionalising agent [20]. Subsequent work has optimised the type and quantity of surface functionalising agent using a range of fatty acids and milling conditions [21] and optimal process produced a super-hydrophobic powder with a water contact angle of 153° [22]. Hydrophobicity results from the micro-particulate texture induced by milling and the formation of calcium stearate self-assembling monolayer that coat the fractured PSA surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobic concrete using waste paper sludge ash

Wong

Barakat

Alhilali

et al. 2015

Cement and Concrete Research

193

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8The feasibility of using a low-cost super hydrophobic powder as water-resisting admixture or water-repellent 9 surface coating for concrete has been investigated. The powder was produced from paper sludge ash (PSA), 10 a by-product from the manufacture of recycled paper. The effect of hydrophobic PSA on workability, 11 strength and transport properties, including sorptivity, water absorption, diffusivity, permeability and 12 electrical conductivity is reported. Samples were prepared at water/cement ratio of 0.38, cured up to 28 days 13 and conditioned at 50°C to constant mass prior to testing. It was found that replacing Portland cement with 14 12% hydrophobic PSA reduced water absorption, sorptivity and conductivity by 84%, 86% and 85% 15 respectively, with no major detrimental effects on hydration, strength and density. When used as a surface 16 coating, the hydrophobic PSA reduced both absorption and sorptivity by 85-99% depending on the adhesive 17 used. Samples surface coated with hydrophobic PSA showed excellent water repelling and self-cleaning 18 characteristics.19

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrophobic concrete using waste paper sludge ash

Wong

Barakat

Alhilali

et al. 2015

Cement and Concrete Research

193

View full text Add to dashboard Cite

show abstract

“…There are several other examples of alkaline liquid waste in the literature that can be used as Ca-rich raw material for the production of CaCO 3 by the carbonization method. Paper sludge ash (PSA) from paper manufacturing has a very small particle size, high pH (>12) [100] as well as high calcium content of about 22% wt. [101,102].…”

Section: Other Ca-rich Wastementioning

confidence: 99%

Utilization of Gaseous Carbon Dioxide and Industrial Ca-Rich Waste for Calcium Carbonate Precipitation: A Review

Czaplicka

Konopacka-Łyskawa

2020

Energies

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Technologies for the management of various types of waste and the production of useful products from them are currently widely studied. Both carbon dioxide and calcium-rich waste from various production processes are problematic wastes that can be used to produce calcium carbonate. Therefore, the purpose of this paper is to provide an overview about the state of the development of processes that use these two wastes to obtain a valuable CaCO3 powder. The paper reviews the current research on the use of post-distillation liquid from the Solvay process, steelmaking slag, concrete, cement, and gypsum waste as well as some others industrial Ca-rich waste streams in the calcium carbonate precipitation process via carbonation route. This work is an attempt to collect the available information on the possibility of influencing the characteristics of the obtained calcium carbonate. It also indicates the possible limitations and implementation problems of the proposed technologies.

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“…mixed-coloured glass fragments from the breakage of coloured glass containers (mainly from food, juice, beer and liquor bottles, i.e. about 10% of the average UK household waste volume) that glass manufacturers cannot reuse: 34% of this waste glass in the UK was recently reported as non-remelt glass (Spathi, 2015). Many other countries (e.g.…”

Section: Introductionmentioning

confidence: 99%

A study on the potential use of paper sludge ash in concrete with glass aggregate

Mavroulidou

Awoliyi

2018

Waste Manag Res

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This short communication focuses on the potential use of paper sludge ash (PSA), a waste product of the paper making industry as an innovative binder partially replacing cement in concrete with glass aggregate.After preliminary testing using binary or ternary CEM-II mixes with PSA/ Pulverised Fly Ash (PFA) a suitable mix for concrete with glass aggregate was identified. Concrete mixes with partial or full natural sand replacement by waste glass aggregate (WGA) were then produced and showed appropriate strengths and overall similar or better water absorption characteristics than control mixes with natural aggregates without manifest alkali-silica reaction (ASR) problems.This shows potential for applications in precast dry mix concrete units based on the required strengths that were achieved.

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A simple method for preparing super-hydrophobic powder from paper sludge ash

Cited by 52 publications

References 11 publications

Hydrophobic concrete using waste paper sludge ash

Hydrophobic concrete using waste paper sludge ash

Utilization of Gaseous Carbon Dioxide and Industrial Ca-Rich Waste for Calcium Carbonate Precipitation: A Review

A study on the potential use of paper sludge ash in concrete with glass aggregate

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