硬石膏

局部地方白云石和硬石膏也是重要的胶结物。

Locally dolomite and anhydrite are important as cements .

结构状硬石膏、香肠状和网眼状构造本身并不表示萨勃哈环境。

Nodular anhydrite and enterolithic and chicken-wire structures do not of themselves signify the Sabkha environment .

SEM照片显示，改性后硬石膏团聚减少；

The SEM photographs showed that the reunite of the anhydrite decreased .

Na2C2O4对硬石膏水化硬化的影响及作用机理

Influence of Na_2C_2O_4 on hydration and hardening of anhydrite and its action mechanism

蓝色硬石膏灌注的模型加工出的隐形义齿临床发生压痛症状的比超硬石膏模型加工出的义齿要明显多。P0.05。

Adelomorphic denture made with models poured with blue hard gypsum has more pressure pain incidence than that with anhydrite ( P0.05 ) .

FT-IR分析表明，硬脂酸与硬石膏的表面以化学键结合。

The FT-IR indicated that the modifers were combined to the surface of anhydrite powder by chemical bond .

推覆构造的主干断层不是F2，而是在推覆体之下的硬石膏段中，硬石膏岩是理想的润滑层；

The backbone fault of the nappe tectonic was not F.2 , but within the anhydrite member underlaid the nappe , and the anhydrock was an ideal lubricating layer ;

运用MD方法对聚羧酸类阻垢分散剂与方解石、硬石膏、羟基磷灰石晶体的相互作用进行了动态模拟。

The interactions between carboxylate polymers and three kinds of scale crystals were simulated dynamically by employing molecular dynamics method .

利用X射线衍射分析法分析水泥的几种主要成分，检测石膏和硬石膏含量的精确度可以达到±0.1%，检测半水石膏含量的精确度可达±0.2%。

In this paper X diffraction method is applied to analyze some main components of cement . By this method the accuracy of detecting the content of gypsum and harden gypsum in cement can be up to ± 0.1 % .

当超硬石膏的水粉比增大为25g∶100g时，模型的表面硬度出现显著的变化（P<0.01），从数值可看出为硬度的降低。

When water / powder ratios of die stone rose to 25:100 , the hardness of model decreased significantly ( P < 0.01 ) .

作者研究了经钛酸酯偶联剂改性的硬石膏粉的表面性质、改性前后硬石膏粉对聚氯乙烯（PVC）复合材料的力学性能的影响以及改性前后硬石膏粉与PVC的结合情况。

Surface characters of anhydrite powder modified by titanate coupling agent , effects of the anhydride powder before and after modification on mechanical properties of PVC compounds and the conjoint state of PVC compounds with modified or unmodified anhydrite powder were studied .

SEM照片显示改性后硬石膏粉与PVC相容性好：力学性能测试表明改性粉体明显改善了复合材料的力学性能，尤其是冲击强度提高了17%～31%；

SEM photographs revealed good compatibility of modified anhydrite powder with PVC . Mechanical tests showed that mechanical properties of the compounds were markedly improved by the modified anhydrite powder s impact strength in particular was increased by 17 % - 31 % .

储集岩的孔隙度一般为8%～16%，渗透率均值为1.970×10-3μm2，属低中孔隙度、低渗透率储层。储渗性主要受方解石、硬石膏、长石含量和粘土矿物的影响。

The porosity of the reservoir sandstones generally ranges between 8 % and 16 % and the mean values of permeability is 1.970 × 10 - 3 μ m , indicating a low to moderate porosity and low permeability of the reservoir sandstones .

原有硬石膏G-N-M-J四元复合激发体系的改性研究已取得了较好的成果，得到了凝结时间控制在30min的硬石膏胶结料。

It had achievement under the study of G-N-M-J four-factor compound arousing system . It gains anhydrite cement , which coagulates in 30 minutes .

随着ADC的逐渐加入，红外光谱图在1200～950cm~（-1）范围内的宽峰逐渐向高频率方向移动，同时在700-400cm~（-1）之间的硬石膏波峰明显增强。

The wave at 1200 ~ 950cm ~ ( - 1 ) on the infrared spectrum of coal moves to high-frequency gradually , and the anhydrite wave at 700-400cm ~ ( - 1 ) on the infrared spectrum of coal strengthes obviously along with the adding of ADC .

试验发现，在蒸养条件（65℃×4h）下，随着SO3掺量提高，含二水石膏水泥强度逐渐由高于变化到低于含硬石膏水泥强度。

Under an initial steam curing condition ( 65 ℃× 4h ), the strength of samples containing gypsum was found gradually changing from higher to lower than that of samples containing anhydrite with the increase of SO 3 content .

麦秸/硬石膏板复合墙体的研究

Research on Complex Wall Material from Wheat Straw and Hard Plasterboard

硬石膏煅烧与复合改性的效应研究

Study on the Efficiency of Calcining and Compound Modifying of Anhydrite

掺加激发剂是提高硬石膏水化活性的有效途径。

Excitant is effective path to increase hydrated activity of anhydrite .

天然硬石膏水化硬化及活性激发研究

Study on Hydration and Hardening of Natural Anhydrite and Its Activation

伊利石+硬石膏+镁绿泥石+铁镁绿泥石；

Mg chlorite + illite + Fe-Mg chlorite + halloysite ;

相应的盖层有硬石膏、页岩、蒸发岩和灰质泥岩；

Seals are anhydrite , shale , evaporate and limerock .

煅烧硬石膏激发粉煤灰活性的研究

Study Activity of The Fly Ash Stimulating by Calcined Anhydrite

硬石膏的流变特性及其长期强度的确定

Rheological properties of anhydrite and determination of its long-time strength

研究表明：改性后的硬石膏粉表面性质由亲水变成亲油；

Study showed that modified anhydrite powder changed from hydrophilic to hydrophobic ;

GB/T5463.3-1986非金属矿产品名词术语石膏、硬石膏

Technical terms of non-metallic mineral products & Gypsum and anhydrite

矿渣改性硬石膏基胶结材水化硬化研究

Hydration and Hardening Characteristics of Anhydrite Binder Modified with Slag

硬石膏与高铝水泥掺量对无收缩灌浆料性能的影响

Influence of anhydrite and alumina cement content on the non-shrinkage grouting material

煅烧硬石膏的溶解活性与结构研究

Study on the Solubility and the Structure of Calcined Anhydrite

硬石膏激发体系的激发效应研究

Research on Stimulating Effect of Stimulation System of Anhydrite