Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 37 for “"Setting time"”.
-
Mechanical Agitation Effects on Physical Properties of Calcium-Silicate-Cement Sealers
… in ISO 6876:2012. This study investigated real-time setting reactions and effects of mechanical agitation on flow, film thickness, and setting time of calcium-silicate-cement sealer (EndoSequence Bioceramic sealer). Single-paste bioceramic sealer (Brasseler, USA) was agitated for 10 seconds …
-
ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΕΛΑΣΤΙΚΗΣ ΣΥΜΠΕΡΙΦΟΡΑΣ ΤΩΝ ΕΛΑΣΤΟΜΕΡΩΝ ΑΠΟΤΥΠΩΤΙΚΩΝ ΥΛΙΚΩΝ ΠΟΛΥΒΙΝΥΛΣΙΛΟΞΑΝΗΣ
… WERE TAKEN FOR EVERY MATERIAL SAMPLE STARTING AT SETTING TIME,AS FOLLOWS: THE FIRST ONE 10 MIN. LATER . THE SECOND ONE 24 HOURS LATER; THE THIRD ONE 48 HOURS AND THE FOURTH ONE 7 DAYS AFTER SETTING TIME.
-
Influence of plasma proteins on setting characteristics of mineral trioxide aggregate like cement
… both individually and in combination on the setting time, compressive strength and relative porosity of an MTA-like dental cement. The cement powder formulation was mixed with the liquid phase containing normal plasma protein concentrations or quarter, double or quadruple the normal plasma …
-
Development and characterisation of a Portland cement-based dental root filling material
… additions for improving the undesirably-long setting time of MTA-like dental materials, whilst maintaining the mechanical, biological and sealing properties. 10wt%PoP accelerated initial setting times of grey and white model cements and MTA from >6h to <40min, and did not significantly change …
-
Performance and properties of structural concrete made with corex slag
… slag. The use of slag generally increased the setting time of the paste, with pastes containing corex slag having a shorter final setting time than those containing blastfurnace slag. The setting time was also found to increase with increasing stag replacement level. The increase in setting …
-
Hydration, Pore Development and Chemical Resistance of Metakaolin - Fly Ash - Portland Cement (MK-PFA-PC) Blends
… of sulphate and synthetic seawater solutions, setting time and heat of hydration will be examined. MK is calcinated clay and is a relatively new pozzolanic material. Although it is a very effective pozzolan it is also very expensive. Using FA, which is a much less expensive material, as a PC …
-
The performance of a blended PFA/GGBS alkali-activated concrete using a silica fume-based activator
… on the short (compressive strength, workability, setting time) and long term (compressive strength, workability retention (2 hours), tensile splitting strength, flexural strength and elastic modulus) properties of concrete and mortar, adopting an experimental based optimum performance testing …
-
Fully Analog Laser Driver With Robust Active Feedback Control
… laser drivers by decreasing steady state error, setting time, response time, and overshoot. Many different feedback control systems were evaluated, and a modified PID controller was chosen which was designed to overcome the operational behavior of real-life electronics. The system was designed …
-
Fresh Mix Properties and Flexural Analysis with Digital Image Correlation of Additively Manufactured Cementitious Materials
… ASTM standards for fresh mix mortars to measure setting time, flow, and early compressive strength as qualitative indicators of printability, pumpability, and buildability. The fresh mix properties were investigated for 12 different mortar mixes to demonstrate the effect that moisture content, …
-
Finite strain behavior of polyurea for a wide range of strain rates
… a special type of elastomer that features fast setting time as well as good chemical and fire resistance. It has also good mechanical properties such as its high toughness-to-density ratio and high strain rate-sensitivity, so its application is recently extended to structural purpose to form …
-
Admixture compatibility and freeze-thaw resistance of concrete prepared using commercially produced limestone calcined clay cements
… the impact on flow diameters and initial setting time of mortars. Polyethylene-based HRWR was the least suited, whereas vinsol-based AEA was the most suited for use with LC3 cements. The high fineness of LC3 demanded a significantly higher dose of HRWR than control to achieve similar flow …
-
Physical and Chemical Properties of a New Mineral Trioxide Aggregate Material
The objective of this study was to compare the time to final set and compressive strength of the white mineral trioxide aggregate (MTA) formulation to the original grey MTA. To test compressive strength, each MTA formulation was placed into Teflon split molds for four hours at 37° Celsius (C) and …
-
Detecting Transient Changes in Gait Using Fractal Scaling of Gait Variability in Conjunction with Gaussian Continuous Wavelet Transform
… of methods which are effective in the clinical setting. Time-series analysis is used to analyze spatiotemporal variables in various populations. More recently, investigators have focused on gait complexity and the structure of spatiotemporal variations during walking and running. This study …
-
Islamic Imaginings: Depictions of Muslims in English-Language Children's Literature in the United States from 1990 to 2010
… in Islamic-themed children's literature over two time strata, one decade before and one decade after the events of September 11, 2001. Random sampling with replacement across the two strata yielded a total sample of 59 books, examined at three coding levels: bibliographic data, story/plot data …
-
Production of Restructured Squid and Scallops from Processing By-Products and Underutilized Species
… transglutaminase at the 1% level with different setting times to yield the highest binding strength. At the setting temperature of 5° C, restructured scallops bound with alginate presented the greatest binding strength at 2 hr setting, while those bound with microbial transglutaminase required 24 …
-
Optical characterisation of the interaction between calcium-silicate based dental restorative materials and dentine
… applications, principally due to their long setting time. Recently, a new formulation of this cement was produced as a coronal restorative material. The aim of this project was to study the nature and dynamics of the interface between this calcium silicate based dental restorative material …
-
Ultrasonic wave reflection measurements on self-compacting pastes and concretes
… ultrasonic wave reflection (UWR) to monitor the setting and stiffening of self-compacting pastes and concretes. An additional objective was to interpret the UWR responses of various modified cement pastes. A polymeric buffer with acoustic impedance close to that of cement paste, high impact …
-
An experimental study of high-performance concrete using metakaolin additive and polymer admixture
… cylinders and 30 prisms were made to study the setting time, workability, mechanical properties and water absorption of the concrete to find the optimum metakaolin to cement ratio (MK/C), polymer to cement ratio (P/C), water to cement ratio (W/C), and the best curing method among the wet, dry …
-
The productive reuse of coal, biomass and co-fired fly ash
… on early-age hydration kinetics, rheology, setting time and permeability was assessed. Furthermore, the pozzolanic reactivity and the microstructural and hydrated phase development of the cement-ash samples were analyzed. The results show that a wood biomass ash sample was not satisfactory …
-
Hydration and air entrainment of fly ash concrete
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
Page 1 of 2