Nowadays, numerous concrete structures are urgently needed to be repaired and strengthened for the severe safety and durability of constructions. In this study, a novel type of silane-based interfacial coupling agent (ICA) is prepared by modifying the silane coupling agent (SCA) with a hydrothermally treated nanosilica (HTNS). The effect of ICA on the cement hydration and crystalline form as
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.
The aseptic loosening process initiates as debonding at the metal-cement interface which can cause micro-motion leading to wear debris, cement fissures and fractures and ultimately to implant loosening. The bonding strengths of cement and implant materials free from contamination have been well reported.
Technique to improve cement penetration in total knee arthroplasty Richard Boe, 1Jr., MD, Ali Oliashirazi, MD1 Author Affiliations: 1. Department of Orthopaedics, Marshall University, Huntington, West ia The authors have no financial disclosures to declare and no conflicts of interest to report. Corresponding Author Richard Boe, Jr., MD
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].
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
Conduction Analysis of Cement Interface Temperature in Total Knee Arthroplasty HISANORI FUKUSHIMA1, YASUSHI HASHIMOTO1, SHINICHI YOSHIYA1, MASAHIRO KUROSAKA1, MITSUMASA MATSUDA2, SHOZO KAWAMURA2, and TAKUZO IWATSUBO2 Department of Orthopedic Surgery, Kobe University Graduate School of Medicine 1
Interlayer Interface Characteristics in 3D Printed Cement Paste • 3D printing of cementitious materials can reduce waste and formwork associated with traditional concrete construction while increasing safety, productivity, and freedom for customization.
Jose N. Gomez S., Soil Cement Stabilization-Mix Design, Control and Results During Construction. All soil cement cylinders made from the asphalt blended base material have an observed maximum dry density of approximately 127 pcf and an observed optimum moisture content of approximately 5.6%. These results are similar to those obtained in the lab
A radiographic and infectious work-up was completed for each patient. All 13 patients underwent a revision of the index surgery with intraoperative diagnosis of tibial component debonding at the implant-cement interface. HVC (Cobalt, DJO Surgical, Vista, CA and Depuy HVC; Depuy Inc, Warsaw, IN) was used in all index cases.
Motivated by recent advances in self-healing cement and epoxy polymer composites, we present a combined ab initio molecular dynamics and sum frequency generation (SFG) vibrational spectroscopy study of a calcium–silicate–hydrate/polymer interface. On stable, low-defect surfaces, the polymer only weakly adheres through coordination and hydrogen bonding interactions and can be easily
Iterface bo coto of cemet cocrete paemet t a aspatc terayer 187 opyrt 018 et a Citation: Li S, Xu K. Interface bond condition of cement concrete pavement with an asphaltic interlayer.MOJ Civil Eng. 2018;4(4):186‒190. DOI: 10.15406/mojce.2018.04.00118 were 5cm and 2cm respectively.
cement injection produced onlr a minimal ingress of cement into the bone in one quadrant. In the remainder, the bone-cement interface was sharply defined with a lucent line in each quadrant (Jig. 5). High pressure injection produced a much mere marked
Cement-specific solutions Solutions for a sustainable cement production Cost-efficient production and a simultaneous emissions reduction can only be achieved by using components that are perfectly adapted to one another. In its SICEMENT product family, Siemens links automation, drive, and power supply systems to form one overall solution.
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.
construction, building materials and cement materials, quality management, planning and certification. paper proposes to contribute on the microstructural characterization of surfaces and interfaces of Portland cement mortars used for coating in construction works. 2. Portland Cement Mortar The mortar used in construction is commonly
A ratio by weight of 0.5 water, 1 cement, 3 sand, and 3 gravel should make a fine concrete, although a little less water (0.4 by weight) would make stronger concrete. The same by volume ( ie. buckets) is a good ratio as well, 1/2 to 1 to 3 to 3 (or a little less water- too much water weakens the concrete, and there will always be some water
Nov 27, 2016Movement, and at times fluid ejection, at the bone-cement interface is taken as evidence of cup loosening. (Extensive demarcation of the outer one third of the cup and gross wear allowing elastic deflection of the UHMWPE cup wall will produce a similar effect.) More than one area of the bone-cement junction must be examined.
Cement was pressurized into the cavity of the anatomic specimens, and the maximum interface shear strength between the cement plug and the bone was experimentally determined for each revision. First-revision interface shear strength was reduced to 20.6% of primary strength, and second revision strength to 6.8% of primary strength.
Two cement-filled molds were brought together with a 1 Kg force forming a cement-cement interface perpendicular to the longitudinal axis of the cement block. Cement was cured in the air for an hour, then stored in a saline solution at 37 oC. The cement block was cut into 8x5x40 mm specimens with a diamond blade saw with water irrigation.
546 Acta Orthop Scand 1991 : 62 (6): 546-548 A method for bone-cement interface thermometry An in vitro comparison between low temperature curing cement Palavita and Surgical Simplex P Sraren Hawing, Kjeld S~balle and Cody Bunger Previous temperature measurements at the bone- those of Surgical Simplex P in an in vitro model
Here are the IS codes which cater to the need of civil engineering relating to Cement and Concrete. These IS codes include the Standardization in the field of all types of cement, pozzolana, testing sand, concrete, aggregates, instruments for cement and concrete testing, cement plant machinery and ferrocement concrete, reinforced concrete and pre-stressed concrete, test methods for concrete
Replacement of Cement in Concrete P. Vipul Naidu1 and Pawan Kumar Pandey2 1Civil-SOT, Pandit Deendayal Petroleum University, Raysan, Gandhinagar, INDIA. 2Engineer, DMRC, Sector-18, Rohini, New Delhi, INDIA. Abstract Cement is a binding material, a substance that sets and hardens independently, and can bind other materials together.
resistant cement , which results in the disappearance of an alteration front that may impair its mechanical integrity, the cement carbonation still remains the main concern of the scientiﬁc community. One possibility is the cement mainly fracturing at the interface with well materials or rocks (caprock
Dec 03, 20168. Waterproof Portland Cement: Waterproof cement is prepared by mixing with ordinary or rapid hardening cement, a small percentage of some metal stearates (Ca, Al, etc) at the time of grinding. This cement is used for the construction of water-retaining structure like tanks, reservoirs, retaining walls, swimming pools, dams, bridges, piers etc.
Nanostructural Characterization 3D of Phases and Interfaces of Portland Cement Mortar 116 One of the main advantages of the technique of AFM is being able to work in different conditions and for studies of the properties of various materials in the ideal conditions for them, i.e. samples at atmospheric
cement-aggregate interface is an essential element needed to model the intrinsic properties of the three phases (aggregates, cement paste and interface). While the existence and formation of the cement-aggregate interface are now well admitted in literature, the mechanical properties of this zone are unknown and remain a rarely treated subject.
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 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.
Jan 20, 2016In general, the factors that determine the mechanical performance of concrete are the strength of the cement matrix, strength of aggregates (which is sufficiently high in most cases), strength of the interface between an aggregate and the cement matrix (which is the source of weakness in most cases), and stress acting on the interface (related to the ratio between the elastic modulus of the
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