Recycling of spent catalyst and waste sludge from industry to substitute raw materials in the preparation of Portland cement clinker

Lin, Kae‐Long; Lo, Kang‐Wei; Hung, Ming‐Jui; Cheng, Ta‐Wui; Chang, Yu‐Min

doi:10.1016/j.serj.2017.05.001

Cited by 28 publications

(25 citation statements)

References 19 publications

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“…The suitable amount of mixing water, setting time, sintering parameters (bulk density and apparent porosity) as well as mechanical strength were tested according to the International Standard Specifications [31][32][33][34].…”

Section: Cement Pate Testingmentioning

confidence: 99%

Statistical Design of Portland cement Modified with Water Treatment Plant Sludge

Algamal*,

Khalil,

Mohammed

2019

IJEAT

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One-Way Analysis of Variance (ANOVA) was applied in this investigation to study the feasibility of modifying ordinary portland cement through Water treatment plant sludge (WTSP) addition. Cement pastes were obtained from mixtures of water treatment plant sludge (WTPS), calcined sludge and ordinary portland cement (OPC) using the standard water consistency. The variation in bulk density, apparent porosity, chemically combined water and compressive strength of the prepared samples were determined over time. In most cases the addition of sludge results in a decrease in apparent porosity (26.36 - 20.40) %, but an increase in chemically combined water (22.46- 29.35), bulk density (1.78 - 1.845) g/cm3 and compressive strength (21- 85) MPa with time. The results show a recognized improvement in densification parameters when using calcined sludge which recommend their use in cement manufacturing so one could expect better economical and environmental benefits. The data obtained were analyzed using a one-way (Analysis of Variance) ANOVA. The determinations were performed in triplicate (n= 3), mean ± standard deviation (SD) values were calculated. A comparison between the means of three different groups and four curing time was performed at 5% level of significance. The ANOVA results show that there are statistically significant difference in chemically combined water property between different combination groups whereas insignificant between the different curing times, for bulk density it shows significant difference between groups in curing times and insignificant difference in combination of groups and mechanical strength shows significant difference between group of curing times and insignificant difference in groups of combination finally for apparent porosity property we didn’t find any significant difference between groups for combination of groups and curing times for the hardened pastes.

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Section: Cement Pate Testingmentioning

confidence: 99%

Statistical Design of Portland cement Modified with Water Treatment Plant Sludge

Algamal*,

Khalil,

Mohammed

2019

IJEAT

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“…Authors have also noted [ 13 ] that the optimal amount of cement to be replaced by the aforementioned materials ranges between 15–20%. A research article [ 14 ] reports that the compressive strength of a composite material produced from ecological cement containing 4% of FCCCw was similar to the strength of ordinary Portland cement (OPC). Another study [ 15 ] reported higher heat of hydration values observed in concrete mixes where cement was substituted by 10% of FCCCw (the paper provides test results for specimens modified with 0%, 10% and 35% of FCCCw).…”

Section: Introductionmentioning

confidence: 99%

Composite Binder Containing Industrial By-Products (FCCCw and PSw) and Nano SiO2

et al. 2021

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This article analyzes the integrated effect of industrial by-products (spent fluidized bed catalytic cracking catalyst waste (FCCCw) and paper sludge waste (PSw) generated in paper manufacturing) combined with nano-SiO2 (NS) on the properties of cement binder, when a certain part of the binder is replaced with the said by-products in the cement mix. Standard testing methods were used to analyze the physical and mechanical properties of cement-based materials. For structure analysis, we used X-ray diffraction (XRD), derivative thermogravimetry (DTG), mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). It was found that the replacement of cement by a combined additive of FCCCw, PSw and NS is important not only for ecological reasons (abatement of CO2 emissions and recovery of waste through secondary raw materials), but also in order to enhance the properties of cement-based binders. Presumably, higher amounts of calcium silicate hydrate (CSH) and calcium alumina silicate hydrate (CASH) in the compound binder are the result of the low content of portlandite and alite in the test specimens. The specimens modified with all three additives had the highest density (~2100 kg/m3), ultrasonic pulse velocity (UPV) (~4160 m/s) and compressive strength (~105 MPa), which was ~40% higher than in the control specimens. The average pore diameter of the complex binder decreased by 21%, whereas the median pore diameter decreased by 47%.

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“…Liew et al [30] investigated the addition of sewage sludge ash into masonry unit production and suggested to use maximum of 20 to 30% of sludge ash instead of natural clay. Lin et al [31] found that the incorporation of the sewage sludge ash up to 10% into a clay brick increases the water absorption and decreases the mechanical strength. Few more studies have been attempted to utilize the WTS for manufacturing construction materials [32,33].…”

Section: Introductionmentioning

confidence: 99%

Incorporation of untreated rice husk ash and water treatment sludge in masonry unit production

Tharshika

Thamboo

Nagaretnam

2019

Sustain Environ Res

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Conventional masonry units are made of clay with high temperature kiln firing or Ordinary Portland Cement (OPC) concrete mix. However, these conventional masonry unit production methods require intensive energy inputs and abundant raw materials. This predicament has led the researchers to look for sustainable methods of producing masonry units. Subsequently a research has been carried out to develop cement masonry unit incorporating Untreated Rice Husk Ash (URHA) and Water Treatment Sludge (WTS). Especially an attempted has been made to partially replace OPC and Quarry Dust (QD) by URHA and WTS, respectively. Totally nine different mix proportions of OPC, URHA, WTS and QD were used. The mechanical and durability characteristics of those masonry unit specimens were investigated to verify the suitability of the proportions. No significant changes in the mechanical and durability properties were noted in replacing OPC by URHA up to 15%. However, replacement of QD by WTS considerably deteriorated the mechanical and durability properties. Therefore, it was proposed to incorporate maximum of 15% URHA and WTS for the production of masonry unit as it complies with the strength requirements of

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Recycling of spent catalyst and waste sludge from industry to substitute raw materials in the preparation of Portland cement clinker

Cited by 28 publications

References 19 publications

Statistical Design of Portland cement Modified with Water Treatment Plant Sludge

Statistical Design of Portland cement Modified with Water Treatment Plant Sludge

Composite Binder Containing Industrial By-Products (FCCCw and PSw) and Nano SiO2

Incorporation of untreated rice husk ash and water treatment sludge in masonry unit production

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