scholarly journals Influence of Biodegradable Release Oils on the Physical and Mechanical Properties of Light-Colored Architectural Concrete

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4630
Author(s):  
Danuta Barnat-Hunek ◽  
Małgorzata Szafraniec
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Physical And Mechanical Properties ◽  
Concrete Surface ◽  
Edible Oil ◽  
Vapor Permeability ◽  
Permeability Test ◽  
New Agents ◽  
Water Based ◽  
Glyceryl Trioleate

In the article, unique formulations of biodegradable, non-toxic, edible oil-based release oils were developed and tested on architectural concrete. The produced agents have physicochemical properties similar to diesel fuel, but at the same time, are renewable and biodegradable products. An ultrasound was used to properly combine the liquid phase of edible oil and the liquid phase of glyceryl trioleate and/or water. Based on the PN-B-19305 standard, seven-component configurations were designed and then tested. The wettability of the concrete was determined by contact angle (CA) analysis. After the application of the formulations produced, the architectural concrete still had good wettability. The vapor permeability test showed that the tested release agents did not inhibit water vapor diffusion from the tested samples. The O65G35 (65% unique edible oil formula and 35% glyceryl trioleate) concrete had the best absorption. In this case, the CA was 56° after oil application and 46° before. The new agents did not impair the adhesion of the plaster to concrete. The O90W10 concrete showed the best adhesion of plasters made with it—51.9 kN/m2. The study also showed that the concrete surface had excellent paint absorption despite the use of release agents. The architectural concrete was evenly covered with paint without any problem. There were no difficulties in applying it, e.g., greasy places preventing the concrete from being coated with emulsion. The suitability of the produced release oils for lightweight architectural concrete structures intended for facades was confirmed. The best results were obtained after using formulations O65T35 and O90W10.

The Effect of Lithium Alumina Silicate Phases on Elastic Modulus of Porcelain Tiles

2014 ◽  
Vol 92 ◽  
pp. 188-193 ◽  
Author(s):  
Tuna Aydin ◽  
Alpagut Kara
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Liquid Phase ◽  
Bulk Density ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Closed Porosity ◽  
Low Viscosity ◽  
Porcelain Tiles

Spodumene, which is a lithium alumina silicate, has been used as a raw material in the production of thermal shock resistant whitewares and sanitarywares. The presence of spodumene results in enhancement of mullitization and imparts better physical and mechanical properties to ceramics. In this study, the influence of Lithium alumina silicate phases on the mechanical properties of standard porcelain stoneware body was investigated. Especially solid-solid reactions were observed between spodumene and quartz or spodumene and clay. These solid-solid reactions bring about a newly formed lithium alumina silicate (LAS) phases. Spodumene allows the development of a low viscosity liquid phase and results in a decrease in closed porosity, also with increase in bulk density, bending strength and elastic modulus.

Study and Application of Salt-Scaling Resistant Admixture in Concrete

2009 ◽  
Vol 405-406 ◽  
pp. 361-366
Author(s):  
Yuan Wang ◽  
Da Li Zhang ◽  
Cui Hong Chen
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Concrete Surface ◽  
Practical Application ◽  
Deicing Salt ◽  
Salt Scaling ◽  
New Type

This paper investigated a new type of admixture which can be used to enhance the resistance of concrete surface to deicing salt deteriorating. Physical and mechanical properties of concrete incorporating this salt-scaling resistant admixture were measured. Practical application on site has proved that this admixture is effective for concrete to resist salt-scaling action.

scholarly journals Silicon carbide liquid-phase sintering with various activating agents

2018 ◽  
pp. 24-30
Author(s):  
S. N. Perevislov ◽  
M. V. Tomkovich ◽  
A. S. Lysenkov
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Liquid Phase ◽  
Mechanical Characteristics ◽  
Solid Phase ◽  
Physical And Mechanical Properties ◽  
Liquid Phase Sintering ◽  
Sintered Materials

The liquid-phase sintering at 1860‒2100 °C was used to prepare the silicon-carbide materials with the 5‒10 weigh percent of oxide additions. The SiC material with the 20 weigh percent of three-component MgO‒Y2O3‒Al2O3system addition showed the ultimate physical and mechanical properties. The mechanical characteristics of the liquidphase sintered materials with the 15 weigh percent of the three-component oxides addition exceed those of both the reactive-sintered and the solid-phase sintered materials and approach to those of the hot-pressed materials.Ill. 5. Ref. 31. Tab. 2.

scholarly journals DETERMINATION OF CONCRETE PROPERTIES DURING THE ASSESSMENT OF THE CONDITION OF FLAT REINFORCED CONCRETE STRUCTURES

2021 ◽  
pp. 80-87
Author(s):  
V. KOLOKHOV ◽  
V. VOLKOVA ◽  
L. MOROZ ◽  
S. BOGDAN
Keyword(s):  
Mechanical Properties ◽  
Concrete Structure ◽  
Concrete Strength ◽  
Physical And Mechanical Properties ◽  
Concrete Surface ◽  
Core Samples ◽  
Reliable Assessment ◽  
Normalized Parameters ◽  
Non Destructive

 Formulation of the problem. Operation of buildings and structures is based on periodic assessment of the condition of structures. The procedure for determining the strength of concrete by non-destructive methods requires a certain preparation of the concrete surface of the structure and sampling in order to calibrate the devices. During sampling, the samples may be damaged, in addition the surface of the cylinders does not meet the requirements for normalized test conditions. Part of the cores during selection is being destroyed, which reduces the representativeness of the results of determining the physical and mechanical properties of concrete. The purpose of the article is to find out the possibilities to increase the reliability of determining the physical and mechanical properties of concrete. Results. In the conditions of a real object, core samples were taken to study the concrete strength of the damaged area. Samples that did not meet the normalized parameters were prepared for testing using a repair mixture Mapegrout Thixotropic. Testing of the recovered core samples showed that the repair mixture adhered well to the surface of the core. The nature of the destruction in the restored and normalized samples is similar. Conclusions. Studies have shown that: the application of the existing method of determining the strength of concrete for slab structures limits the possibility of using core samples taken from structures; the use of Mapegrout Thixotropic repair mixture allows to carry out tests according to the normative method of damaged concrete samples or samples rejected due to size mismatch; reliable assessment of the deformable properties of concrete cores in many cases is impossible; the existing methodology needs to be improved or replaced by an alternative one; quantitative assessment of the rheological properties of the concrete mixture used for the manufacture of concrete structure is possible on the basis of comparing the deformable and strength characteristics of concrete structure, which requires formalization of the procedure and standardization.

High Cycle Fatigue Behaviour of Cu/Sn Intermetallic Compounds Prepared by Transient Liquid Phase Bonding Process

2021 ◽  
Vol 1016 ◽  
pp. 268-273
Author(s):  
Agnieszka Betzwar Kotas ◽  
Golta Khatibi ◽  
Farzad Khodabakhshi ◽  
Andreas Steiger-Thrisfeld
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Single Phase ◽  
Transient Liquid Phase ◽  
Physical And Mechanical Properties ◽  
Test System ◽  
Bending Test ◽  
Fatigue Properties ◽  
Phase System ◽  
Two Phase

Transient liquid phase (TLP) bonds using Cu-Sn system have been suggested as high strength and temperature resistant joints for power electronics applications. While the physical and mechanical properties of these joints has been investigated to some extent, studies on fatigue properties and long term reliability of TLP joints are scarce. In this work TLP bonding was performed to produce thin Cu-Sn intermetallic joints by using Cu and 97Sn3Cu solder alloy as interlayer. Different processing conditions resulted in three types of thin joints consisting of three phases (Cu3Sn/Cu6Sn5/solder remnants), two phases (Cu3Sn/Cu6Sn5) and a single phase (Cu3Sn) with an overall thickness of ≤ 20 μm. The shear strength of the TLP joint containing one or two high melting point IMC layers showed a significant temperature resistance up to 200°C. Fatigue studies of TLP joints were conducted by using a 3-point-cyclic bending test system operating at 20 kHz. The highest fatigue resistance was obtained for the single-phase Cu3Sn joints with superior shear and flexural resistance. The two phase joints (Cu3Sn/Cu6Sn5) showed a slightly lower lifetime than the three phase system containing IMCs and residual solder. Fracture surfaces analysis in correlation with static and cyclic mechanical properties, provided insight into the failure mechanism of the Cu-Sn TLP joints.

Study and Application of Salt-Scaling Resistant Admixture in Concrete

2006 ◽  
Vol 302-303 ◽  
pp. 105-110 ◽  
Author(s):  
Yuan Wang ◽  
Bin Liu
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Concrete Surface ◽  
Practical Application ◽  
Deicing Salt ◽  
Salt Scaling ◽  
New Type

This paper investigated a new type of admixture which can be used to enhance the resistance of concrete surface to deicing salt deteriorating. Physical and mechanical properties of concrete incorporating this salt-scaling resistant admixture were measured. Practical application on site has proved that this admixture is effective for concrete to resist salt-scaling action.

scholarly journals The influence of cellular concrete surface modification on its physical and mechanical properties

2014 ◽  
Vol 2 (11(68)) ◽  
pp. 34
Author(s):  
Олександр Юрійович Лобанов ◽  
Валентин Анатолійович Свідерський
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Physical And Mechanical Properties ◽  
Concrete Surface ◽  
Cellular Concrete

scholarly journals Rheological, physical, and mechanical properties of chicken skin gelatin films incorporated with potato starch

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Syazwani Aqilah Alias ◽  
Norizah Mhd Sarbon
Keyword(s):  
Mechanical Properties ◽  
Water Solubility ◽  
Potato Starch ◽  
Composite Films ◽  
Physical And Mechanical Properties ◽  
Gelatin Film ◽  
Vapor Permeability ◽  
Starch Concentration ◽  
Chicken Skin ◽  
Chicken Skin Gelatin

AbstractThe aim of this study was to investigate the rheological, physical, and mechanical properties of chicken skin gelatin film forming solutions (FFSs) and films incorporated with potato starch. Chicken skin gelatin-based FFSs with various potato starch concentrations (0, 2, 4, 6, 8, and 10%, w/w) were prepared via casting technique. The dynamic viscoelastic properties of FFS were measured, and film characterization in terms of physical and mechanical properties was conducted. Potato starch incorporation with chicken skin gelatin-based FFS resulted in improvement of viscous behavior (G″ > G′). As potato starch concentration increased, the tensile strength, elongation at break, and elastic modulus values of chicken skin gelatin-based films also increased (p < 0.05). Additionally, increasing the concentration of potato starch caused incremental changes in water vapor permeability and melting temperatures (Tm), but a reduction in water solubility (p < 0.05). In addition, the surface smoothness and internal structure of composite films improved via potato starch incorporation. The incorporation of potato starch was also found to provide good barrier properties against ultraviolet and visible light, but did not significantly influence the transparency values of composite films. Overall, chicken skin gelatin film with 6% potato starch concentration incorporation was the most promising composite film, since it was found to exhibit optimal performance in terms of physical properties.

scholarly journals Development of green MMT-modified hemicelluloses based nanocomposite film with enhanced functional and barrier properties

BioResources ◽  
2019 ◽  
Vol 14 (4) ◽  
pp. 8029-8047
Author(s):  
Kassim M. Haafiz ◽  
Owolabi F. A. Taiwo ◽  
Nadhilah Razak ◽  
Hashim Rokiah ◽  
Hussin M. Hazwan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Nanocomposite Film ◽  
Tensile Modulus ◽  
Water Vapor Permeability ◽  
Physical And Mechanical Properties ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Vapor Permeability ◽  
Scanning Calorimetry

A biocomposite was successfully prepared by blending montmorillonite (MMT)/hemicellulose from oil palm empty fruit bunches (OPEFB) with carboxymethyl cellulose (CMC) through solution casting. The composite was characterized by scanning electron microscopy (SEM), Fourier transmission infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The results displayed good compatibility between the mixtures of the blended MMT/hemicellulose and CMC due to the hydrogen bonding and electrostatic interaction. There was an improvement in the thermal analysis through their thermogravimetry analysis (TGA), derivative thermogravimetry (DTG), and differential scanning calorimetry (DSC), mechanical properties (tensile strength and tensile modulus),and water vapor permeability (WVP). The best values of tensile strength and tensile modulus of 47.5 MPa and 2.62 MPa, respectively, were obtained from 60H-40CMC-MMT nanocomposite films. The results showed that the mixture of the blended MMT/hemicelluloses and CMC produced a robust nanocomposite film with improved physical and mechanical properties, demonstrating that it is a promising candidate for green packaging applications.

Sign in / Sign up

Export Citation Format

Share Document