Abstract Cementing operations in wellbores, especially for long casings, are often challenging and prone to deficiencies when not properly planned executed. While exploring exploiting of geothermal resources at temperatures above the critical point water was attempted different drilling projects recent years, well design, procedure run cement production casings became a key challenge engineers....

Microbially induced carbonate precipitation is a promising ground improvement technique which can enhance the mechanical properties of soils through calcium carbonate. Experimental evidences indicate that precipitated display different distribution patterns. Crystals develop at grain–grain contacts (contact cementing), connect soil grains were initially not in contact with each other (bridging)...

Reducing the consumption of cement with simultaneous utilizing waste materials as cement replacement is preferred for reasons of environmental protection. Blended cements consist of different supplementary cementitious materials (SCMs), such as fly ash, silica fume, Ground Granulated Blast Furnace Slag (GGBFS), natural pozzolans, etc. These materials should be chemically activated to show effec...

Using the agent based simulation model Sociodynamica, I explore the effect of various intensities of feelings of shame in cementing social bonds that affect the aggregate health (average longevity of agents) and wealth (GDP) of two artificial societies: A primitive society with no division of labor, and a monetized society with division of labor for three different tasks. The results show that ...

Gas migration in oil and gas wells is defined as gases and/or fluids from adjacent formations invading a freshly cemented annulus. During well completions, can migrate to zones with lower pressure or even the surface. Static gel strength (SGS), related yield stress of cement, widely accepted measurement used predict minimize migration. In this review article, we look at mechanisms some possible...

BACKGROUND Cemented stems show good long-term results and the survival of new implants can be predicted by their early subsidence. With EBRA-FCA (Femoral Component Analysis using Einzel-Bild-Röntgen-Analyse) early subsidence as an early indicator for later aseptic loosening can be analysed. For the cemented TwinSys stem mid- and long-term data is only avalible from the New Zeeland Arthroplasty ...

INTRODUCTION The purpose of this synthesis of available information was to provide the Texas Department of Transportation (TxDOT) with a concise document on the state of the practice regarding the use of kiln dusts for stabilization of subgrade soils or granular base materials in highway pavements. This document should assist TxDOT in making decisions related to allowing the use of kiln dusts a...

We have investigated the mid-term outcome of total shoulder replacement using a keeled cemented glenoid component and a modern cementing technique with regard to the causes of failure and loosening of the components. Between 1997 and 2003 we performed 96 total shoulder replacements on 88 patients, 24 men and 64 women with a mean age of 69.7 years (31 to 82). The minimum follow-up was five years...

BacKGRoUnD The correct cementing technique for knee replacement involves maintaining the knee in extension for a protracted period of time to compress the cement effectively during polymerisation.1,2 Wound closure can be completed in flexion or extension with no difference in functional outcome3 but is often also completed with the leg maintained in extension due to decreased tissue tension. Wi...