scholarly journals Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 925
Author(s):  
Milan Kragović ◽  
Nenad Ristić ◽  
Jelena Gulicovski ◽  
Andrijana Nedeljković ◽  
Snežana Pašalić ◽  
...  
Keyword(s):  
Construction Material ◽  
Chemical Characterization ◽  
Physical And Mechanical Properties ◽  
Partial Replacement ◽  
Test Results ◽  
Cement Replacement ◽  
Physical Chemical ◽  
Standard Procedures ◽  
Concrete Production

The presented study is a continuation of the research with the aim of finding a useful value of hazardous waste slag generated by the combustion of lignite in heating plants and its application in the construction industry. The different amounts of cement (10, 15, 20 and 25%) were replaced with waste slag and silica fumes in mortars and concrete production. Detailed physical–mechanical characterization was performed on the mortar and concrete samples according to standard procedures. Test results indicated that the replacement of cement with slag and silica fumes reduces the physical and mechanical properties of mortar and concrete, but cement composites retained the required structural properties. If 15–20% is considered an acceptable level of compressive strength decrease, then it can be concluded that waste slag can be implemented in practice and be used as a construction material, with cement replacement in the maximal amount of 20% (17.8% of slag and 2.2% of silica fumes). On hardened mortar samples with maximal possible cement replacement (20%), physical–chemical characterizations were performed and included X-ray and infrared spectrophotometry, scanning electron microscopy, and thermal analysis. Results showed the absence of new phases and the presence of only those which were characteristic for starting samples, predominantly portlandite, quartz, calcite and calcium silicate-oxide.

scholarly journals Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I—Physical–Chemical and Physical–Mechanical Characterization of Slag

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 992
Author(s):  
Andrijana Nedeljković ◽  
Marija Stojmenović ◽  
Jelena Gulicovski ◽  
Nenad Ristić ◽  
Sonja Milićević ◽  
...  
Keyword(s):  
Silica Fume ◽  
Mechanical Characterization ◽  
Setting Time ◽  
Partial Replacement ◽  
Minimal Amount ◽  
Cement Replacement ◽  
Physical Chemical ◽  
Concrete Production

Numerous factors influence the complexity of environmental and waste management problems, and the most significant goal is the reuse of materials that have completed their “life cycle” and the reduction in the use of new resources. In order to reduce impact of waste slag on the environment, in the present study, waste slag, generated in heating plants after lignite combustion, was characterized in detail and tested for application as a replacement for cement in mortar or concrete production. For physical–chemical characterization of slag, different experimental and instrumental techniques were used such as chemical composition and determination of the content of heavy metals, investigation of morphological and textural properties, thermal analysis, X-ray, and infrared spectroscopy. Physical–mechanical characterization of slag was also performed and included determination of activity index, water requirement, setting time and soundness. A leaching test was also performed. Presented results show that waste slag may be used in mortar and concrete production as a partial cement replacement, but after additional combustion at 650 °C and partial replacement of slag with silica fume in the minimal amount of 12%. The maximal obtained cement replacement was 20% (17.8% slag and 2.2% of silica fume).

scholarly journals Growth, sensory and chemical characterization of Mediterranean yellowtail (Seriola dumerili) fed diets with partial replacement of fish meal by other protein sources

2020 ◽  
Vol 18 ◽  
pp. 100466
Author(s):  
R. Monge-Ortiz ◽  
S. Martínez-Llorens ◽  
M.J. Lemos-Neto ◽  
S.L. Falcó-Giaccaglia ◽  
M.J. Pagán ◽  
...  
Keyword(s):  
Fish Meal ◽  
Chemical Characterization ◽  
Partial Replacement ◽  
Protein Sources ◽  
Seriola Dumerili

scholarly journals Editorial for Special Issue “Historical Mineral Pigments”

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 237
Author(s):  
Carolina Cardell ◽  
Jose Santiago Pozo-Antonio
Keyword(s):  
Chemical Characterization ◽  
Glass Enamel ◽  
Special Issue ◽  
High Quality ◽  
Physical Chemical ◽  
Scientific Disciplines ◽  
Natural And Synthetic

The physical–chemical characterization of natural and synthetic historical inorganic and mineral pigments, which may be found embedded in paintings (real or mock-ups), glass, enamel, ceramics, beads, tesserae, etc., as well as their alteration under different decay scenarios, is a demanding line of investigation. This field of research is now both well established and dynamic, as revealed by the numerous publications in high-quality journals of varied scientific disciplines. [...]

Physical-Chemical Characterization of Fruit Purees and Relationship with Sensory Analysis Carried out by Infants (12 to 24 mo)

2015 ◽  
Vol 80 (5) ◽  
pp. E1005-E1011 ◽  
Author(s):  
A.M. Inarejos-García ◽  
V. Mancebo-Campos ◽  
P. Cañizares ◽  
J. Llanos
Keyword(s):  
Sensory Analysis ◽  
Chemical Characterization ◽  
Physical Chemical

scholarly journals Effect of limestone powder on self-compacting concrete

2021 ◽  
Vol 9 (2) ◽  
pp. 71-78
Author(s):  
O. M. A. Daoud ◽  
O. S. Mahgoub
Keyword(s):  
Construction Material ◽  
Control Sample ◽  
Drying Shrinkage ◽  
Heat Of Hydration ◽  
Limestone Powder ◽  
Partial Replacement ◽  
Self Compacting Concrete ◽  
Technical Problems ◽  
Cement Replacement ◽  
Partial Cement Replacement

Self-compacting concrete (SCC) is an innovative construction material in the construction industry. It is a highly fluid and stable concrete that flows under its own weight and fills completely the formwork. The SCC requires high powder content (mainly of cement) up to 600kg/ to achieve its properties. This will be problematic because increasing the cement content is not feasible, and may cause high cost and some other technical problems such as higher heat of hydration and higher drying shrinkage. This paper investigates the effect of limestone powder (LSP) on fresh and hardened properties of SCC due to the use of LSP as a partial cement replacement. For comparison, a control sample of concrete was prepared without LSP to compare it with the various samples containing different percentages of LSP as a partial replacement of cement. Four mixes with a constant amount of (superplasticizer, sand, coarse aggregate, and water) at various replacement levels of 0%, 10%, 20% and 30% from the cement weight were prepared. The experimental results show that the LSP can be effectively used as a partial cement replacement on SCC to reduced cost and enhanced the performance of SCC in fresh and hardened stages.  

Physical–chemical characterization of binary systems of metformin hydrochloride with triacetyl-β-cyclodextrin

2007 ◽  
Vol 45 (3) ◽  
pp. 480-486 ◽  
Author(s):  
Giovanna Corti ◽  
Gaetano Capasso ◽  
Francesca Maestrelli ◽  
Marzia Cirri ◽  
Paola Mura
Keyword(s):  
Binary Systems ◽  
Chemical Characterization ◽  
Metformin Hydrochloride ◽  
Physical Chemical

Two- and Three-Dimensional Physical–Chemical Characterization of CER[AP]: A Study of Stereochemistry and Chain Symmetry

2021 ◽  
Vol 125 (35) ◽  
pp. 9960-9969
Author(s):  
Fabio Strati ◽  
Joana S. L. Oliveira ◽  
Lukas Opalka ◽  
Tetiana Mukhina ◽  
Bodo Dobner ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Chemical Characterization ◽  
Physical Chemical
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