scholarly journals An Experimental Study of Possible Post-War Ferronickel Slag Waste Disposal in Szklary (Lower Silesian, Poland) as Partial Aggregate Substitute in Concrete: Characterization of Physical, Mechanical, and Thermal Properties

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2552
Author(s):  
Marcin Małek ◽  
Mateusz Jackowski ◽  
Waldemar Łasica ◽  
Kamil Dydek ◽  
Anna Boczkowska
Keyword(s):  
Thermal Properties ◽  
Production Process ◽  
Mechanical And Thermal Properties ◽  
Natural Aggregate ◽  
Concrete Production ◽  
Ferronickel Slag ◽  
Natural Aggregates ◽  
Post War ◽  
Concrete Characterization ◽  
Slag Waste

Aggregates derived from waste, due to the growing awareness of global warming, are more and more often used in the concrete production process. This way, their disposal not only reduces the pollution of the Earth but also lowers the consumption of natural aggregates, which are limited. One of the new “eco” aggregates may be a ferronickel slag waste (FNSW), which was generated in post-war metallurgical processes and stored in Szklary (Lower Silesian, Poland). In order to determine the possibility of using ferronickel slag waste aggregate (FNSWA) in the concrete production process, new concrete mixtures were designed and tested. Physical properties (cone slump, air content, pH, and density), mechanical properties (compressive strength, flexural strength, and tensile strength), and thermal properties (thermal conductivity) were assessed for all new laboratory recipes. Moreover, the modulus of elasticity and Poisson’s ratio were determined. This study includes five different contents of FNSWA in the amount of 5%, 10%, 15%, 20%, and 25% of the mass of natural aggregate as its partial substitute. The final results were compared to the base sample (BS) containing 100% natural aggregate, which was granite.

scholarly journals Sustainability Potential Evaluation of Concrete with Steel Slag Aggregates by the LCA Method

2020 ◽  
Vol 12 (23) ◽  
pp. 9873
Author(s):  
Vojtěch Václavík ◽  
Marcela Ondová ◽  
Tomáš Dvorský ◽  
Adriana Eštoková ◽  
Martina Fabiánová ◽  
...  
Keyword(s):  
Life Cycle ◽  
Construction Industry ◽  
Raw Materials ◽  
Steel Slag ◽  
Physical And Mechanical Properties ◽  
Partial Replacement ◽  
Utilization Rate ◽  
Natural Aggregate ◽  
Concrete Production ◽  
Natural Aggregates

Sustainability in the construction industry refers to all resource-efficient and environmentally responsible processes throughout the life cycle of a structure. Green buildings may incorporate reused, recycled, or recovered materials in their construction. Concrete is as an important building material. Due to the implementation of by-products and waste from various industries into its structure, concrete represents a significant sustainable material. Steel slag has great potential for its reuse in concrete production. Despite its volume changes over time, steel slag can be applied in concrete as a cement replacement (normally) or as a substitute for natural aggregates (rarely). This paper focused on an investigation of concrete with steel slag as a substitute of natural gravel aggregate. Testing physical and mechanical properties of nontraditional concrete with steel slag as a substitute for natural aggregates of 4/8 mm and 8/16 mm fractions confirmed the possibility of using slag as a partial replacement of natural aggregate. Several samples of concrete with steel slag achieved even better mechanical parameters (e.g., compressive strength, frost resistance) than samples with natural aggregate. Moreover, a life cycle assessment (LCA) was performed within the system boundaries cradle-to-gate. The LCA results showed that replacements of natural aggregates significantly affected the utilization rate of nonrenewable raw materials and reduced the overall negative impacts of concrete on the environment up to 7%. The sustainability indicators (SUI), which considered the LCA data together with the technical parameters of concrete, were set to evaluate sustainability of the analyzed concretes. Based on the SUI results, replacing only one fraction of natural gravel aggregate in concrete was a more sustainable solution than replacing both fractions at once. These results confirmed the benefits of using waste to produce sustainable materials in construction industry.

Effect of Metashaleas SCM on Mechanical and Thermal Properties in Concrete Production

2015 ◽  
Vol 763 ◽  
pp. 41-46
Author(s):  
Dana Koňáková ◽  
Eva Vejmelková
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Mechanical Strength ◽  
Thermal Characteristic ◽  
Mechanical And Thermal Properties ◽  
Similar Material ◽  
Natural Origin ◽  
Burnt Clay ◽  
Concrete Production ◽  
Means Of Measurement

This article is focused on SCM questions. Studied material - metashale belongs among artificial pozzolana with natural origin. Shale is clay mineral and by its burning at 700°C similar material as metakaolin arises. Metashale is used as cement replacement up to 60% in concrete production. By means of measurement of basic physical properties, mechanical strength and thermal characteristic the effect of metashale is determined. Concrete containing 20% of metashale shows improvement of studied properties except of thermal conductivity. The 40% of the SCM leads to concrete production with same properties as the reference concrete. And when 60% of the burnt clay is utilized, final values of studied properties shows little deteriorations. However all studied materials shows appropriate properties to be applicable in civil engineering branch as load-bearing concrete.

MSWI Bottom Ash as an Aggregate for a Lightweight Concrete

2014 ◽  
Vol 1054 ◽  
pp. 254-257 ◽  
Author(s):  
Kirill Polozhiy ◽  
Pavel Reiterman ◽  
Martin Keppert
Keyword(s):  
Thermal Properties ◽  
Municipal Solid Waste ◽  
Lightweight Concrete ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Mechanical And Thermal Properties ◽  
Mechanical Parameters ◽  
Municipal Solid Waste Incineration ◽  
Mswi Bottom Ash ◽  
Natural Aggregates

This paper is focused on the problem of the lightweight concretes made of the Municipal Solid Waste Incineration (MSWI) bottom ash. Their basic, mechanical and thermal properties were investigated. According to the requirements were designed 7 mixtures and reference made just from natural aggregates. The first 4 mixtures had a higher porosity, which explained good thermal properties, but it had low mechanical parameters. Next 4 mixtures had lower level of porosity and had shown good ultimate stress data.

Mechanical and thermal characterization of grafted PP-NCC nanocomposites

2019 ◽  
pp. 089270571987822
Author(s):  
Saud Aldajah ◽  
Mohammad Y Al-Haik ◽  
Waseem Siddique ◽  
Mohammad M Kabir ◽  
Yousef Haik
Keyword(s):  
Thermal Properties ◽  
Interfacial Adhesion ◽  
Thermal Characterization ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Three Point Bending ◽  
Twin Screw ◽  
Thermal Stability Of

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.

Ta addition effects on the structure, mechanical and thermal properties of sputtered Hf-Ta-C film

2019 ◽  
Vol 45 (12) ◽  
pp. 15596-15602 ◽  
Author(s):  
Xinlei Gu ◽  
Lina Yang ◽  
Xiaorong Ma ◽  
Xuan Dai ◽  
Jia Wang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Mechanical And Thermal Properties
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