scholarly journals The Influence of Incinerated Sewage Sludge as an Aggregate on the Selected Properties of Cement Mortars

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5846
Author(s):  
Teresa Rucińska ◽  
Anna Głowacka ◽  
Robert Sidełko
Keyword(s):  
Sewage Sludge ◽  
Building Materials ◽  
Raw Materials ◽  
Experimental Studies ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Natural Sand ◽  
Fine Grained ◽  
Cement Mortars ◽  
Natural Aggregates

In line with the trend of using waste raw materials in the technology of building materials, experimental studies of cement mortars containing various amounts of fine-grained waste aggregate were carried out. The waste aggregate was based on an incinerated municipal sewage sludge which was mechanically crushed to an appropriate grading. Chemical and physical properties of the waste aggregate are presented. Mortars with varying amounts of waste aggregate as a replacement for natural sand were prepared. Study determines compressive strength and flexural strength up to 56 days. Properties such as capillary action, air content and thermal conductivity were determined. The results of the tests has shown that the incinerated waste sludge can be used as a partial or total replacement for natural aggregate. In mortars with waste aggregate, a favorable relation between flexural and compressive strengths was observed, which translates into increased strength of the interfacial transition zone. A significant increase in water absorption was observed for mortars containing high amounts of waste aggregate, which is directly related to its porous structure. Conducted studied prove that the aggregate obtained from incineration of the municipal sewage sludge can a feasible alternative for natural aggregates in production of masonry and rendering mortars for construction purposes.

scholarly journals Sustainable cement mortars

2018 ◽  
Vol 49 ◽  
pp. 00090 ◽  
Author(s):  
Teresa Rucińska
Keyword(s):  
Sewage Sludge ◽  
Building Materials ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Practical Applications ◽  
Technical Parameters ◽  
Fine Grained ◽  
Physicomechanical Characteristics ◽  
Natural Aggregate ◽  
Cement Mortars

The results described here on the basic technical parameters of cement mortars made from fine-grained concrete recyclate, ceramic recyclate, and slag, obtained from the incineration of municipal sewage sludge, demonstrate their usefulness in the production of building materials. Changes were introduced to the composition of cement mortars involving the replacement of natural aggregate with recyclate of the same fraction in the following volumes: 10%, 20% and 30%. The physicomechanical characteristics constitute the basis for further research which will help determine their practical applications.

scholarly journals Fly Ash from Thermal Conversion of Sludge as a Cement Substitute in Concrete Manufacturing

2021 ◽  
Vol 13 (8) ◽  
pp. 4182
Author(s):  
Gabriela Rutkowska ◽  
Marek Chalecki ◽  
Mariusz Żółtowski
Keyword(s):  
Fly Ash ◽  
Sewage Sludge ◽  
Raw Materials ◽  
Sewage Treatment ◽  
Chemical Properties ◽  
Cement Composite ◽  
Production Costs ◽  
Municipal Sewage ◽  
Partial Replacement ◽  
Municipal Sewage Sludge

Striving for reduction of production costs and constraints on natural resources cause the use of waste materials as substitutes of traditional raw materials to become increasingly important. Dynamic development of sewerage systems and sewage treatment plants observed over the recent years leads to increase of mass of the produced sewage sludge. According to the Waste Law, the municipal sewage sludge can be used if it is properly stabilized, e.g., through thermal processing. This process results in significant quantities of fly ash which must be properly utilized. The paper presents results of investigations of influence of partial replacement of cement by the fly ash from sewage sludge on concrete parameters. It was designed as a C20/25 class concrete mix, based on the Portland cement CEM I 42.5R with various ash content. Physical and chemical properties of the ash as well as frost resistance and the compressive strength of the concrete after 28, 56 and 365 days of curing were investigated. The obtained results of investigations confirm the possibility of application of fly ash wastes as a cement substitute in the concrete manufacturing. If a predefined quantity of cement is replaced by the fly ash, then one can obtain cement composite with good strength parameters.

Recovery of nutrients from sewage sludge – Results of the European research-project SUSAN

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
C. Adam ◽  
G. Kley ◽  
F.-G. Simon ◽  
A. Lehmann
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Organic Pollutants ◽  
Raw Materials ◽  
Thermochemical Treatment ◽  
Rotary Furnace ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Gas Tight ◽  
Treatment Step

Municipal sewage sludge is a carrier of nutrients – most important phosphorus (P) – but also contains organic pollutants and heavy metals. A two steps thermal treatment based on 1. mono-incineration of sewage sludge under destruction of organic pollutants and 2. thermochemical treatment of the resulting ashes to remove heavy metals and increase P-bioavailability is suggested by the authors. The process aims at P-fertilisers production from sewage sludge. Seven sewage sludge ashes of different origin and composition and one residue from gasification of sewage sludge were thermochemically treated. The raw ashes were mixed with a chlorine donor (e.g. MgCl2) and thermally treated in a gas tight lab-scale rotary furnace. The distributions of the heavy metals between solid and gas phase were determined. The heavy metals concentrations of the treated ashes matched the legislative limits in most cases. The products from thermochemical treatment are suited raw materials for P-fertiliser production. Relevant process parameters such as temperature, type and concentration of Cl-donor and retention time were optimised for the thermochemical treatment step.

scholarly journals The Use of Modal Analysis in Addition Percentage Differentiation, and Mechanical Properties of Ordinary Concretes with the Addition of Fly Ash from Sewage Sludge

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5039
Author(s):  
Gabriela Rutkowska ◽  
Mariusz Żółtowski ◽  
Michał Liss
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Sewage Sludge ◽  
Modal Analysis ◽  
Raw Materials ◽  
Sewage Treatment ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Pilot Studies ◽  
Concrete Mix

Production cost reduction and constraints on natural resources cause the use of waste materials as substitutes of traditional raw materials to become increasingly important. The dynamic development of sewerage systems and sewage treatment plants leads to increases in the produced sewage sludge. According to the Waste Law, municipal sewage sludge can be used if it is properly stabilized. This process results in significant quantities of fly ash that must be utilized. This paper presents investigation results of partial cement replacement influence by the fly ash from sewage sludge on concrete parameters. The results confirm the possibility of fly ash waste applications as a cement substitute in concrete manufacturing. In the later parts of the publication, a pilot study was conducted using the modal analysis methodology and aimed at checking the hypothesis of whether vibration methods can be used in the assessment of the amount of the admixture used in concrete and the effect it has on concrete properties. This is the first time that vibration tests have been used to determine the diversity of the concrete mix composition and to distinguish the percentage of ash added. There are no studies using modal analysis to distinguish the composition of a concrete mix in the scientific literature. The article shows that the vibration test results show the differentiation of concrete composition and can be further improved as a method for determining the composition of mixtures and for distinguishing their mechanical properties. These are only pilot studies, which, in order to develop the target cognitive inference, should be performed in the future on a significantly enlarged number of the studied samples.

A long-term chemical and infrared spectroscopy study on a soil amended with municipal sewage sludge

Agronomie ◽  
2001 ◽  
Vol 21 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Giovanni Gigliotti ◽  
Pier Lodovico Giusquiani ◽  
Daniela Businelli
Keyword(s):  
Infrared Spectroscopy ◽  
Sewage Sludge ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Spectroscopy Study

scholarly journals The Influence of Cement Substitution by Biomass Fly Ash on the Polymer–Cement Composites Properties

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3079
Author(s):  
Beata Jaworska ◽  
Dominika Stańczak ◽  
Joanna Tarańska ◽  
Jerzy Jaworski
Keyword(s):  
Fly Ash ◽  
Building Materials ◽  
Raw Materials ◽  
Combustion Process ◽  
Biomass Combustion ◽  
Cement Composites ◽  
Cement Mortars ◽  
Mineral Additive ◽  
Biomass Fly Ash

The generation of energy for the needs of the population is currently a problem. In consideration of that, the biomass combustion process has started to be implemented as a new source of energy. The dynamic increase in the use of biomass for energy generation also resulted in the formation of waste in the form of fly ash. This paper presents an efficient way to manage this troublesome material in the polymer–cement composites (PCC), which have investigated to a lesser extent. The research outlined in this article consists of the characterization of biomass fly ash (BFA) as well as PCC containing this waste. The characteristics of PCC with BFA after 3, 7, 14, and 28 days of curing were analyzed. Our main findings are that biomass fly ash is suitable as a mineral additive in polymer–cement composites. The most interesting result is that the addition of biomass fly ash did not affect the rheological properties of the polymer–cement mortars, but it especially influenced its compressive strength. Most importantly, our findings can help prevent this byproduct from being placed in landfills, prevent the mining of new raw materials, and promote the manufacture of durable building materials.

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