Fiber Cement Boards Manufactured from a mixture of cellulose fiber, cement and sand, this product is optimal for external cladding. It is easily screwed to Galvanized profiles or wood noggins.
Electron probe microanalysis data indicates that sodium, potassium, and calcium ions migrate into opal aggregate from the cement paste in experimental alkali-silica reactive concretes. The reaction also modifies the development of cement phases at the interface with the opal and these modifications are reflected in modifications of the tensile strength of the opal/cement bond.
The objective with the procedure is to obtain the optimal cement-bone and cement-implant interfaces to achieve long term implant survival. Zimmer Biomet comprehensive assortment of bone cements, products for mixing and delivery, pressurization and bone bed preparation, is one of the most complete portfolios for Modern Cementing Technique in the ...
Nov 26, 2018· The purpose of this study was to evaluate the bonding interface between a self-adhesive resin cement to in vitro eroded dentin. Seventy-two third molars were used and divided into two groups: sound dentin and in vitro eroded dentin. The in vitro erosion was performed following a demineralization protocol, in which the specimens were immersed in a demineralizing solution for 2 minutes per cycle ...
Apr 25, 2016· More recently, Gupta et al. 37 used the same approach in this study but deposited MWNT-latex thin films onto sand for casting smart mortar specimens with nano-engineered cement–sand interfaces. Their results validated the piezoresistive properties of mortar specimens, and EIT was able to identify the location of damage created by drilled holes.
Based on collected field samples, the cement-formation interface has previously been identified as the most likely leak path for stored CO2 along wells . In the present work we have investigated by μ-CT how the porosity at the cement-formation interface is affected by varying surface properties of the rock.
and structural damage were observed from basalt rock near the interface with cement (Figure 2.7). Sample #8 showed major initial fractures along the interface between cement and basalt almost from top to bottom, indicating a weak bond between cement and basalt, which is similar to sample #7.
title = "Cement viscosity affects the bone-cement interface in total hip arthroplasty", abstract = "Quantitative information regarding the interface strength and degree of cement penetration associated with cement viscosity during total hip arthroplasty is limited.
In the framework of CO2 geological storage, one of the critical points leading to possible important CO2 leakage is the behaviour of the different interfaces between the rocks and the injection wells. This paper discussed the results from an experimental modelling of the evolution of a caprock/cement interface under high pressure and temperature conditions.
cement/bone interface.7,9,10 Certainly, failure at the cement/ bone interface is an issue, regardless of the condition of the cement/prosthesis interface. Thus, the interfacial strength has become increasingly important. Push-out and shear tests are regularly used to assess the shear strength of the cement/bone interface,11–14 and results ...
Background The treatment of painful osteoporotic vertebral compression fractures with transpedicular cement augmentation has grown significantly over the last 20 years. There is still uncertainty about long-term and midterm effects of polymethyl methacrylate in trabecular bone. Preservation of the trabecular structures, as well as interdigitation of the cement with the surrounding bone ...
The cement line, which is the interface between the 'fibers' (osteons) and extraosteonal bone matrix, may impart important mechanical properties to compact bone. The nature of these properties is not known partly because the composition of the cement line is unknown.
We measured the cement mantle thickness at the bone cement interface from the distal femur and proximal tibia. If the thickness was >1 mm, it was considered an outlier. Results. The mean cement mantle thickness at the interface was 1.4 mm in the distal femur and 0.8 mm in the proximal tibia.
Influence of Fibers on Interface Shear strength of Cement Concrete Overlays Jayasree K.V., Prebhakumari K.S. Abstract Formation of interfaces or joints is more common in the construction of very large structures where mass concreting is required. Interfacial joints play a major role in the overall efficiency of the system.
Keywords: Biodentine, glass-ionomer cement, interfaces, Raman, confocal microscopy, second harmonic generation Glass-ionomer cements (GIC) are also water-based restorative materials. GIC setting, however, is an acid-base reaction that involves the formation of …
Introduction. The cement–bone interface is one of the critical factors for the longevity of cemented THA. Cementing technique has improved with the advent of cement guns, pulsatile lavage, and intramedullary bone plugs for the femur [12–14], and flanged sockets for the acetabulum .Multiple small anchoring holes in the acetabulum improve the mechanical bonding at the cement–bone interface.
interface behavior of deformed bar in cement-soil mixture. It is known that the strength of a cement-soil mixture depends mainly on cement content, water content, and curing period with respect to a certain amount of to-be-treated soft soils [1,11,16].
Interfaces and Handlers¶. Cement has a unique interface and handler system that is used to break up pieces of the framework and allow customization of how Cement handles everything from logging to config file parsing, and almost every action in between.
Conversely, if the cement-stem interface is warmer than the cement-bone interface, a stiff cement shell will form ﬁrst around the stem the cement will shrink towards the stem and away from the bone. Reduction of porosity at the cement-stem interface will tend to improve the fatigue life of the cement.
Farran (1) was among the first to note that the interface formed between aggregate and '_ulk" cement paste was not sharp, and that the cement paste in contact with the a_m'egate differed from the '_ulk" cement paste. Barnes et al. (2,3) and more recently Yuan and Odler
Background. Recent literature has shown debonding of the tibial implant–cement interface as a potential cause for implant loosening. The purpose of this case series is to report this phenomenon in a historically well-performing implant when used with high-viscosity cement (HVC).
Strain shielding in trabecular bone at the tibial cement-bone interface Article in Journal of the Mechanical Behavior of Biomedical Materials 66 · November 2016 with 19 …
Interface Transition Zone between Aggregate and Cement Paste Gi-Sung Pang,1) Sung-Tae Chae,2) and Sung-Pil Chang3) (Received September 8, 2008, Revised July 30, 2009, Accepted November 20, 2009) Abstract: This paper proposes a semi analytical model to describe the pore structure of concrete by a set of simple equations.
Carbonation of the cement paste by calcite precipitation was not observed at 76 days, but at 202 days, the presence of calcite was revealed in the first 150 μm from the interface and in the same area at 415 days (Fig. 4, left). At the interface, calcite crystals were unequally distributed for the two latest samples.
The use of a cement gun enables higher pressurization of cement during application to the tibial plateau and aids in interdigitation into cancellous bone. The PALAMIX ® Cement Gun from Heraeus Medical has won an international design award 9 for its ease of use and is compatible with the PALAMIX ® and PALACOS ® R pro vacuum mixing systems.
Sep 19, 2005· During implant insertion into the cement, air could be trapped at the implant cement interface; where the air entrapped has been found to vary with how fast the implant is inserted . The air pockets dragged into the cement may form voids that lower the cement/implant interface strength, which can lead to premature failure.
A cement impactor for uniform cement penetration in the upper tibia. Clin Orthop Relat Res 1984; (182): 206-10. [PMID: 6692615] ], pulsed lavage [7 Ritter MA, Herbst SA, Keating EM, Faris PM. Radiolucency at the bone-cement interface in total knee replacement. The effects of bone-surface preparation and cement technique.
the cement-casing interface. the bulk cement. the cement-formation interface. In the petroleum sector many studies have been carried out on the cement-casing interface and the bulk cement to improve the isolation efficiency of the cement in the wellbore. Less attention has been given to the cement-to-formation interface.
PDF | Laboratory tests, including splitting tension, three-point bending, and direct shear tests, were conducted on polymer cement mortar (PCM)-concrete composite specimens with various degrees of ...
strong adhesion between the stem-cement interface to avoid loosening and ultimately failure of the implant. In this study we developed a test model that isolated the interaction at the cement-stem interface to determine the adhesion strength of the stem to a cement mantle. We used a well accepted stem design with a satin
The stem-cement interface experiences fretting wear in vivo due to low-amplitude oscillatory micromotion under physiological loading, as a consequence it is considered to play an important part in the overall wear of cemented total hip replacement.
Jun 02, 2017· Although a large body of microscopic studies has been performed on the interfaces present in fiber-reinforced cement-based composites (Bentur and Mindess 2006; Sakulich and Li 2011), the nanostructure of the interfaces between cement and polymer fiber has not been thoroughly investigated. This understanding is needed to fully predict and ...