The potential use of drinking water sludge ash as supplementary cementitious material in the manufacture of concrete blocks

El-Gamal

J Mater Cycles Waste Manag

2022

This work was focused on evaluating the suitability of replacing Portland cement (PC) by 5, 10 and 15 mass % of activated alum sludge waste (AAS) as a pozzolanic material. Exploitation of low-cost nanocomposite for bolstering the physical, mechanical, and stability against firing of PC–AAS-hardened composites was inspected. CuFe2O4 spinel nanoparticle with average particle size (~ 50 nm) was prepared. Inclusion of CuFe2O4 spinel in different PC–AAS-hardened composites bolsters their physicomechanical features at almost normal curing ages as well as their stability against firing. The positive impact of synthesized CuFe2O4 spinel was affirmed via TGA/DTG and XRD techniques, which indicated the presence of diverse hydration yields such as CSHs, CASHs, CFSH, and CuSH that enhance the overall physicomechanical characteristics and thermal stability of various PC–AAS-hardened composites. The composite containing (90 PC–10 AAS waste–2 CuFe2O4) offers many benefits from the economic and environmental view. Graphical abstract

Section: Compressive Strength (Cs)supporting

confidence: 82%

Section: Compressive Strength (Cs)supporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Utilization of alum sludge waste for production of eco-friendly blended cement

El-Gamal

J Mater Cycles Waste Manag

2022

“…As a result of the fact that it is regarded as a hazardous waste, alum sludge (AS), which is a by-product of water treatment plants, is unable to be disposed of in a landfill in a typical manner. Instead, the material must be transported to a specialized facility that is built for the express purpose of dealing with hazardous waste 1 – 3 . It is essential to dispose of solid wastes, particularly alum sludge (AS), as quickly as is practically practicable to reduce the number of potential threats that may be posed to the environment 4 .…”

Section: Introductionmentioning

confidence: 99%

Cost-effective and green additives of pozzolanic material derived from the waste of alum sludge for successful replacement of portland cement

Eessaa

et al. 2022

Sci Rep

The major objective of this study was to examine the viability of using 5, 10, or 15 mass% of Activated Alum Sludge waste (AAS) instead of Ordinary Portland Cement (OPC) as a pozzolanic ingredient in concrete. This fundamental inquiry framed the investigation and OPC-AAS-hardened composites were studied to see whether they may benefit from inexpensive nanocomposites in terms of improved physical properties, mechanical strength, and resistance to heat and flame. The investigation set out to see how inexpensive nanocomposite might be put to use and the nanoparticles of CuFe2O4 spinel with an average size of less than 50 nm were successfully manufactured. Many different OPC-AAS-hardened composites benefit from the addition of CuFe2O4 spinel, which increases the composites' resistance to fire and enhances their physicomechanical properties at roughly average curing ages. Synthesized CuFe2O4 spinel was shown to have desirable characteristics by TGA/DTG and XRD. By using these methods, we were able to identify a broad variety of hydration yields, including C–S–Hs, C–A–S–Hs, C–F–S–Hs, and Cu–S–Hs, that enhance the physicomechanical properties and thermal resistivity of OPC-AAS-hardened composites as a whole. The composite material comprising 90% OPC, 10% AAS waste, and 2% CuFe2O4 has several positive economic and environmental outcomes.

“…Because of the high pozzolanic activity it possesses, calcined water treatment sludge (also known as WTS) has recently been the focus of a few research studies 7 . These studies have investigated the possibility of incorporating calcined WTS as additional cementitious material in cement-based products and evaluated how doing so would impact the mechanical properties of the cement [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Cost-Effective and Green Additives of Pozzolanic Material Derived from The Waste of Alum Sludge for Successful Replacement of Portland Cement

Eessaa

et al. 2022

Preprint

The primary purpose of this investigation was to find out whether it would be feasible to successfully replace Ordinary Portland Cement (OPC) with 5, 10, or 15 mass % of activated alum sludge waste (AAS) as a pozzolanic material. This was the overarching question that guided the research that was conducted. A study into the use of low-cost nanocomposites to increase the physical, mechanical, and stability against the fire of OPC–AAS-hardened composites was carried out. The goal of this inquiry was to explore the utilization of low-cost nanocomposite. Producing CuFe2O4 spinel nanoparticles with an average particle size of less than 50 nm was doable. The introduction of CuFe2O4 spinel into a variety of OPC–AAS-hardened composites improve both the physicomechanical characteristics of the composites at nearly typical curing ages as well as the resistance of the composites to the effects of fire. Techniques such as TGA/DTG and XRD were utilized to provide evidence that synthesized CuFe2O4 spinel had favorable properties. These approaches revealed the presence of a range of hydration yields, such as CSHs, CASHs, CFSHs, and CuSHs, which improve the overall physicomechanical parameters as well as the thermal stability of a wide variety of OPC–AAS-hardened composites. The composite material that is composed of (90 % OPC, 10 % AAS waste, and 2 % CuFe2O4 offer several advantages, both financially and ecologically.