Dimensional Stability of Grout-Type Materials Used as Connections between Prefabricated Concrete Elements

2015 ◽  
Vol 27 (9) ◽  
pp. 04014246 ◽  
Author(s):  
Igor De la Varga ◽  
Benjamin A. Graybeal
Keyword(s):  
Dimensional Stability ◽  
Materials Used ◽  
Concrete Elements

scholarly journals Preparation and characteristics of an advanced polyester tire cord with hybrid effect

2019 ◽  
Vol 14 ◽  
pp. 155892501882527 ◽  
Author(s):  
Liyong Tian ◽  
Pengfei Lv ◽  
Jianrui Zhuo ◽  
Qufu Wei
Keyword(s):  
Design Of Experiment ◽  
Dimensional Stability ◽  
Low Cost ◽  
Strain Curve ◽  
High Modulus ◽  
Tire Cord ◽  
Stress Strain Curve ◽  
Hybrid Effect ◽  
Handling Performance ◽  
Materials Used

Many efforts have been made to study new reinforced materials to meet the increasing demands of various products. Hybrid cords have attracted a great deal of attention due to low cost and incomparable properties. Nylon and polyester are currently two of the most prevalent materials used as tire cords, while how to incorporate both of their desirable properties into one cord has been a meaningful scientific research. In this study, a new advanced polyester tire cord was developed by adopting the design of experiment. Its stress–strain curve demonstrated a high modulus typical for the standard polyester thus improving tire dimensional stability and handling performance and high breaking elongation up to 21.7% that was a favorable characteristic of nylon cord creating a hybrid effect. H-adhesion experiment showed that this advanced cord had comparable adhesion to rubber as the standard polyester tire cord and could be used for production of tires.

scholarly journals Dimensional Stability and Accuracy of Silicone – Based Impression Materials Using Different Impression Techniques – A Literature Review

PRILOZI ◽  
2017 ◽  
Vol 38 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Borjan Naumovski ◽  
Biljana Kapushevska
Keyword(s):  
Literature Review ◽  
Dimensional Stability ◽  
Storage Time ◽  
Elastic Recovery ◽  
Impression Material ◽  
Impression Technique ◽  
Impression Materials ◽  
Scientific Papers ◽  
Materials Used ◽  
Stability And Accuracy

Abstract A quality-made dental impression is a prerequisite for successful fixed-prosthodontic fabrication and is directly dependent on the dimensional stability, accuracy and flexibility of the elastomeric impression materials, as well as on the appropriately used impression techniques. The purpose of this paper is to provide a literature review of relevant scientific papers which discuss the use of various silicone impression materials, different impression techniques and to evaluate their impact on the dimensional stability and accuracy of the obtained impressions. Scientific papers and studies were selected according to the materials used, the sample size, impression technique, storage time, type of measurements and use of spacer for the period between 2002 and 2016. In the reviewed literature several factors that influence the dimensional stability and accuracy of silicone impression molds, including the choice of the type of viscosity, impression material thickness, impression technique, retention of the impression material on the tray, storage time before the casting, number of castings, hydrophilicity of the material, release of byproducts, contraction after polymerization, thermal contraction and incomplete elastic recovery were presented. The literature review confirmed the lack of standardization of methodologies applied in the research and their great diversity. All findings point to the superiority of the addition silicone compared to the condensation silicone.

Improvement of Mechanical Properties and Lateral Resistance of Brick Masonry Walls by Using Indigenous Materials

2011 ◽  
Vol 255-260 ◽  
pp. 684-688
Author(s):  
Khan Shahzada ◽  
Tetsuro Goto ◽  
Akhtar Naeem Khan ◽  
Amjad Naseer ◽  
M. Fahad
Keyword(s):  
Mechanical Properties ◽  
Research Work ◽  
Structural Testing ◽  
Wire Mesh ◽  
Masonry Walls ◽  
Lateral Resistance ◽  
Laboratory Test Results ◽  
Indigenous Materials ◽  
Materials Used ◽  
Concrete Elements

In this paper, improvement of mechanical properties of unreinforced masonry walls based on the laboratory test results is discussed. Various masonry specimens have been tested by Portable Structural Testing Equipment (PSTE). Masonry prisms have been reinforced with indigenous materials (wire mesh and bamboo) and confined with reinforced concrete elements. The tensile strength, shear strength and lateral resistance of masonry walls increases up to 5.4, 2.73 and 5.65 times respectively by using plaster, wire mesh, bamboo and confinement. The Indigenous materials used in this research work are cheap and easily available as compared to FRP and other materials. Analysis for lateral resistance of masonry walls has been made by using different relationships.

scholarly journals Deterioration and Protection of Concrete Elements Embedded in Contaminated Soil: A Review

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3253
Author(s):  
Ginneth Patricia Millán Ramírez ◽  
Hubert Byliński ◽  
Maciej Niedostatkiewicz
Keyword(s):  
Contaminated Soil ◽  
Concrete Structures ◽  
Coating Materials ◽  
Advantages And Disadvantages ◽  
Concrete Deterioration ◽  
Different Types ◽  
Materials Used ◽  
Concrete Elements

Coating materials are considered one of the most antique materials of human civilization; they have been used for decoration and the protection of surfaces for millennia. Concrete structures—due to their permanent exposure to different types of environments and contaminants—require the use of coatings that contribute to its preservation by reducing the corrosion of its components (steel and aggregates). This article intends to introduce the principal causes of concrete deterioration and the coating materials used to protect concrete structures, including a summary of the coating types, their advantages and disadvantages, and the latest developments and applications. Furthermore, this paper also assesses brief information about the potential challenges in the production of eco-friendly coating materials.

scholarly journals Study of form-stable features of transforming parts of youth kit

2021 ◽  
pp. 86-90
Author(s):  
K. Zh. Kucharbaeva ◽  
A. S. Razbekova
Keyword(s):  
Quality Indicators ◽  
Dimensional Stability ◽  
Processing Methods ◽  
Materials Used ◽  
Adhesive Materials

The article examines the quality indicators of adhesive materials that form the dimensional stability of the transformed parts, and substantiates the processing methods. As a result, the order of gluing the parts and the order of gluing the adhesive materials used in the manufacture of transformable sets were determined.

scholarly journals In vitro Study on the Dimensional Stability of Interocclusal Recording Materials

2017 ◽  
Vol 54 (3) ◽  
pp. 557-564
Author(s):  
Diana Cerghizan ◽  
Kamel Earar ◽  
Mihaela Monica Scutariu ◽  
Alina Ramona Dimofte ◽  
Gina Paunita Grecu ◽  
...  
Keyword(s):  
Dimensional Stability ◽  
In Vitro Study ◽  
Dental Arch ◽  
Continuous Increase ◽  
Recording Material ◽  
Standard Value ◽  
Materials Used ◽  
Dental Apparatus ◽  
Functional Position

The teeth are found in the alveolar processes of both the upper and lower jaw and they form the two maxillary and mandibular dental arches, the various relations of which support the performance of the dental apparatus functions, one of the most important of which is mastication. These relations are also known as interocclusal relations, among which the moments in which the dento-dental contacts (occlusal relations) play an important role. Maximum intercuspation (MI) is the most frequent mandibulo-cranial functional position with dento-dental contact. The vast majority of functional food incision and mastication cycles end in MI. The highest number of dento-dental contacts, and the largest possible stability and surface of these contacts are also achieved in MI. Given the relative easiness of determination, recording and transfer of the MI position, it is used in many clinical situations to report the models of the two arches. The interocclusal recording materials used in our study were seven silicones, six of which with addition reaction, five with special destination for interocclusal relation determination and a putty-like silicone normally used for dental arch impression - Elite HD and one condensation silicone used for impressions. The reason for choosing the last two materials was the fact that some practitioners frequently use putty-like impression silicone to determine interocclusal relations. According to the findings of the measurements shown in table 1, further to the initial impression process, at the time T0, satisfactory results were obtained both for addition silicones and for condensation silicones, Registrado X-tra being the only recording material which exhibited major deviation from the standard dimension (3 mm). As for the Optosil condensation silicone, we noted a significant increase of the thickness of the material starting with the first hour after impression and reaching considerable values on the 5th day, which were 0.3 mm higher than the standard value. Rigid addition silicones have the lowest dimensional stability; putty-like silicones are frequently used to record interocclusal relations for fixed prosthetics, which is wrong since they grow rapidly and this impedes on the space between the treated tooth and the opposite tooth, the result being a high restoration, which may determine premature contacts. Except for Optosil, which exhibited a continuous increase, most materials may be used to mount models in the simulator after 24 h.

scholarly journals COMPARISON OF THE ADDITION OF Manihot utilisima (PATI UBI WOOD) TO DIMENSIONAL STABILITY OF IRREVERSIBLE HYDROCOLLOID MOLD

2021 ◽  
Vol 1 (Volume 1 No 1) ◽  
pp. 19-26
Author(s):  
Ilmianti ◽  
Muhammad Iqbal ◽  
Muhammad Hidayatullah
Keyword(s):  
Dimensional Stability ◽  
Cassava Starch ◽  
Alternative Form ◽  
Control Group ◽  
Impression Material ◽  
Molding Material ◽  
Irreversible Hydrocolloid ◽  
Group A ◽  
Materials Used ◽  
Printed Materials

Alginate impression material is used to print the teeth and the oral tissues; alginate molding material is from abroad and expensive. Modification to the impression material alginate with cassava starch with 1: 1 obtained detailed reproduction of the same printed material alginate without added with cassava starch. The study's objective was to get an alternative form of printed material alginate plus Manihot utilisima (cassava starch) with the nature of the physical properties following the standard. The study methods used laboratory experiments. The materials used in this study were printed material alginate (Hydrogum fast setting), starch cassava starch cap dua kelinci, water, and tools calliper inside digital. There were four groups of a control group, a group cassava starch ratio of 50: 50, groups of cassava starch ratio of 60: 40, and a comparison group of cassava starch 70: 30. The results were dimensional stability of printed materials Alginate without additions were (73.72, 48.77, 30.51), the dimensional stability of the printed material alginate with a ratio of 50: 50 were (74.24, 40.82, 30.76), the dimensional stability of the printed material alginate with a ratio of 60: 30 were ( 75.39, 49.67, 31.57), and the results of dimensional stability alginate ((irrevesible hydrocolloid ) molding material with a ratio of 70: 30 were (76.36, 50.94, 32.86). The conclusion is the addition of Manihot utilisima on standard printed material alginate (irrevesible hydrocolloid) obtained dimensional stability test results that met the standards at a ratio of 50: 50 of ANSI/ADA no.18/1992. Manihot utilisima was one of the appropriate alternatives as a mixture in impression material alginate (irrevesible hydrocolloid).

scholarly journals Strengthening of Structure by Repair, Rehabilitation, Retrofitting and Restoration

2020 ◽  
pp. 130-136
Author(s):  
Shakti Singh ◽  
Devender Kumar
Keyword(s):  
Advanced Materials ◽  
Structural Failure ◽  
Chemical Attack ◽  
Large Numbers ◽  
Alkali Aggregate Reactivity ◽  
Materials Used ◽  
Seismic Forces ◽  
Concrete Elements ◽  
Design Construction

All structures have a assumed use able life, which depends on the weathering action, chemical attack, embedded metals, alkali-aggregate reactivity, fire, due to overload, seismic forces, quality of materials used, techniques, workmanship etc. The large numbers of monuments, which are cherished heritage structures have stood well over a period of time due to best material and periodical maintenance. But some of these have shown signs of distress due to age, aggressive natural environment/industrial pollution etc. Further, distress gets aggravated due to overcrowding and misuse of buildings. Some Buildings have also failed due to faulty design, construction, bad quality materials, poor workmanship etc. The various causes of structural failure and the principles of rehabilitation of structures are discussed. In the structures, the cracks are generated due to different causes e.g. in some cases cracks are caused after the structure has been completed for a few years which results in shortening of life and strength of structure. The main criteria is how to repair a reinforced concrete elements of structures and for this the skills, knowledge, and experience required to repair damaged or deteriorated structures are decidedly different from those required to build new structures. The purpose of this paper is to justify the latest techniques, advanced materials and various requirements of repairing work to obstruct the deterioration which is necessary and economical than to reconstruct the building.

Effect of UV disinfection on dimensional stability and infection control of elastomeric impression materials

2015 ◽  
Vol 7 (2) ◽  
pp. 60-63
Author(s):  
Neha Hajira ◽  
Ashwini Wadhwani ◽  
G. Vinaya Kumar
Keyword(s):  
Infection Control ◽  
Dimensional Stability ◽  
Scientific Paper ◽  
Uv Disinfection ◽  
Dental Practice ◽  
Ultraviolet Disinfection ◽  
Disinfection Methods ◽  
Impression Materials ◽  
Materials Used

Abstract In many areas of dental practice which involves exposure to blood and other body fluids, there is growing concern regarding improvements in cross-infection control. There is a need for disinfection methods to be effective while also being cheap, rapid, non-toxic, broad spectrum and easy to practice. Impression materials used in prosthodontics cannot be heat sterilized and are often damaged by chemical disinfection. In recent advances, ultraviolet disinfection method has begun to prove its effectiveness to control contamination of impression materials by killing microbes while preserving the quality of material. This scientific paper to be presented is on a study conducted to evaluate the effect of ultraviolet disinfection on the dimensional stability and infection control of elastomeric impression materials. How to cite this article Vinaya Kumar G, Wadhwani A, Hajira N. Effect of UV disinfection on dimensional stability and infection control of elastomeric impression materials. CODS J Dent 2015;7:60-63.

Sign in / Sign up

Export Citation Format

Share Document