dihydrate gypsum 中文意思是什麼
dihydrate gypsum
解釋
二水石膏-
The result shows, for this composite cement system, retarding action of dihydrate gypsum is more obvious than that of anhydrite, meanwhile, anhydrite tends to cause setting time short and water needed increased
結果表明：二水石膏對該種復合體系水泥的緩凝作用比硬石膏明顯，硬石膏易引起復合體系水泥急凝和需水量增大。 -
Through the analyzing the macro - structure to micro - structure, the author considers that retarding mechanism of citric acid is that citric acid and ca in the gypsum form the complexant ion, and hinder the crystallization center of dihydrate crystal bigger ; that of sodium tripolyphosphate is that it combined with ca, hinders the dissolve of hemihydrate. formation and growth of crystallization center ; that of bone glue is the glue - protection and chemical absorption action of active group, which also retards the formation and growth of crystallization center
通過宏觀到微觀的分析，筆者認為，檸檬酸的緩凝作用的原因主要在於檸檬酸與鈣形成絡合離子，影響了二水石膏晶體的晶核長大過程；多聚磷酸鈉與鈣形成某種復鹽，對于石膏晶體的溶解、成核和長大過程均有強烈的阻礙影響；骨膠則在於膠體對半水石膏的包裹和活性基團的化學吸附，使二水石膏晶體的成核和長大困難。 -
Standard practice for calculation of supersaturation of barium sulfate, strontium sulfate, and calcium sulfate dihydrate gypsum in brackish water, seawater, and brines
微鹹水海水及鹽水中硫酸鋇硫酸鍶和無水硫酸鈣 -
The influence of different gypsum on strengh of portland - sulphoalminate composite cement system is complicated, related with aluminiferouse mineral in cement system and the so4 ( superscript 2 - ) concentration of its hydrated solution ; in distilled water and maximum lime wash, the dissolution rate of dihydrate gypsum is higher than that of anhydrite but the dissolubility is lower
石膏品種對硅酸鹽硫鋁酸鹽復合體系水泥強度的影響較復雜，與水泥體系中含鋁礦物及其水化溶液中so4 （上標2 - ）離子濃度有關；在蒸餾水和飽和石灰水中，二水石膏的溶解速度比硬石膏快，溶解度比硬石膏低。
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