to about 450° F. are provided. The compositions are basically comprised of hydraulic cement, water and a set retarding polymer containing repeating units having the formula ##STR1doi:US5484478 ALance E. BrothersUSBrothers L E.High Temperature Set Retarded CementCompositions and Methods[].US....
GEOTEMPERATURE FIELD AND UP- WELLING ACTION OF HOT FLOW BODY AND ITS RELATIONSHIP WITH NATURAL GAS MIGRATION AND ACCUMULATION IN YINGGEHAI BASIN莺歌海盆地... Yinggehai basin is a high geotemperature basin that developed at Eogene, and its high geotemperature field and high value of terrestrial ...
Since the 1970s,resin cementshave been formulated based ondimethacrylateresin chemistry as two-paste systems, which are easy to mix and cure at room temperature.3Their bonding to tooth structure relies on the use of etch-and-rinse or self-etch adhesives. Composition is usually a mixture of dim...
Whereas in the intermediate and final setting depths, the temperature most likely exceeds the cement retrogression temperature of 230 °F as identified by API 65–1 (2018). Above this temperature, the CS and TS of the set cement demonstrate a rapid decline which exposes the cement to various ...
in both the direction perpendicular to the lamellar and parallel to the lamellar direction. The testing was conducted at a temperature of 20 °C and each sample was tested once. To ensure the reliability of the results, at least three samples were tested for each group, the average results...
Upcycling waste flavedo into a bio-admixture of set retarder and compressive strength enhancer for cement-based materials LZ A,PCA C,YX B,... 被引量: 0发表: 2021年 Application of a strength enhancer for deep well cement slurry at low temperature Several problems exist in Zhongyuan oilfield, ...
When the deformation rate was less than 0.025 mm/h, the temperature was set to the next step. Figure 1 Test apparatuses: (a) consolidation apparatus; (b) universal testing machine; (c) particle size analyzer. Full size image Unconfined compression strength test (UCS) UCS tests were conducted...
For the superficial temperature measurement, a FLIR E75 camera was used to capture the infrared images. When the internal temperature of the chamber stabilized at 50 °C, an infrared thermal image was collected from each side of the composite. Thermal properties were analysed: thermal conductivity,...
This zonal structure is preserved at an ambient temperature because equilibrium with the ferrite crystal is not attained. At approximately 1613 K, solid solutions of C3S, C2S and C3A start to precipitate. The phase composition at an ambient temperature would be a solid solution of C3S, C2S,...
In this study, a novel low temperature setting calcium phosphate鈥搒ilicate cement was obtained by mixing CaHPO 4 路2H 2 O (DCPD) and Ca 3 SiO 5 (C 3 S) w... Z Huan,C Jiang - 《Journal of Materials Science Materials in Medicine》 被引量: 80发表: 2009年 加载更多来源...