NY-2复合激发剂对改善掺粘土火山灰水泥性能的作用

配制了由减水剂、盐类组成的NY 2复合激发剂 ,并将其掺入由 42 5R水泥和粘土混合而成的火山灰水泥中。实验结果表明 ,当粘土掺量为 30 %时 ,掺加 0 .8%～ 1.2 %的NY 2复合激发剂 ,可以在提高水泥早、后期强度的同时 ,改善水泥流动性 ,调整水泥凝结时间并保持火山灰水泥的其他特性。应用该复合外加剂可取得较好的经济效益     

基于碱激发剂作用下火山灰的活性研究

掺碱激发剂火山灰-水泥既可以有效利用火山灰和保护环境,又可以改善火山灰-水泥胶凝材料的性能.选用掺合料为火山灰,变换不同含量的碱激发剂(氢氧化钠与水玻璃),测定龄期为7、28、90 d时混凝土的力学性能,确定最佳组合,并进行电镜试验,观察微观结构.研究结果表明:掺碱激发剂会使胶凝材料的强度随碱掺量的变化而变化,掺氢氧化钠的早期强度要优于掺水玻璃的早期强度,而后期掺水玻璃的强度要比掺氢氧化钠的强度发展得好.     

煤矸石的热力-化学复合活化研究

采用不同温度下的煅烧和添加化学激发物质的复合活化方法对煤矸石用作高性能水泥辅助性胶凝材料时潜在活性激发效果进行了实验探讨。实验结果表明，原始煤矸石未经任何处理直接用作水泥混合材时基本上不表现出火山灰活性，会导致水泥强度大幅度降低。煤矸石经600～900℃加热处理之后再与水泥混合使用，表现出显著的火山灰活性，水泥强度得到明显改善。用芒硝或水玻璃作为激发荆对煤矸石施加热力-化学复合活化，在适宜的掺量范围内水泥强度，尤其是早期强度，得到进一步改善。采用水玻璃的场合活化效果优于采用芒硝的场合。煤矸石热力一化学复合活化的适应范围为热处理温度600～800℃，水玻璃掺量不超过4％。     

掺复合碱激发剂的矿渣水泥稳定碎石基层路用性能研究

为了克服矿渣水泥稳定碎石基层早期强度不足的问题,选择氢氧化钠与硅酸钠两种碱性激发剂对矿渣水泥的活性进行激发,根据单掺试验结果掺配出一种复合碱激发剂,并研究了该复合碱激发剂对水稳碎石基层无侧限抗压强度、劈裂强度、抗弯拉强度、抗压回弹模量及干缩性能的影响。试验结果表明,掺入氢氧化钠或硅酸钠均能有效激发矿渣水泥的活性,二者的合理掺量分别为6%与4%,按此合理掺量复配而成的复合碱激发剂具有比单掺更优异的效果;该复合碱激发剂较好地提高了基层试块的无侧限抗压强度、劈裂强度、抗弯拉强度、抗压回弹模量,但对干缩性能产生了不利影响。     

钢渣粉煤灰复合水泥的研究

以钢渣、粉煤灰、水泥熟料为主要原料,并掺入少量激发剂,制备高混合材掺量高强复合水泥.研究钢渣细度、水泥的复合组分比例及激发剂对钢渣粉煤灰复合水泥性能的影响,并通过SEM、XRD分析激发剂对复合水泥水化性能的影响.结果表明:钢渣比表面积在310m2/kg以上时,钢渣具有较好的活性.激发剂可进一步增大钢渣、粉煤灰的水化活性,加快复合水泥的水化速度,从而提高水泥的力学性能,缩短水泥的凝结时间,但激发剂对复合水泥水化产物种类影响不大.     

用正交试验法选择煅烧煤矸石水泥熟料的矿化剂

采用正交试验法研究了以煤矸石代粘土烧制水泥熟料时矿化剂的选择及最佳掺量问题。借助ＸＲＤ、ＳＥＭ、物理检验等测试手段，对熟料的矿物组成、显微结构和物理性能进行了分析，结果表明：煅烧该类水泥熟料时，较为理想的矿化剂是单掺Ｐ２Ｏ５，其最佳掺入量约为生料的０．３％     

改善粉煤灰水泥早期性能的两个措施

粉煤灰水泥的水化过程包括水泥熟料的水化反应和粉煤灰的活性组份与Ｃａ（ＯＨ）２的火山灰反应两类不同的反应,因而促进粉煤灰水泥水化的作用方式也有两类,当粉煤灰掺量较大时,采取促进粉煤灰的火山灰反应的措施效果较显著,且后期效果比早期效果显著;在粉煤灰掺量较小时采取促进水泥熟料水化反应的措施,对粉煤灰水泥的作用较为显著,根据这些特征,对两种激发剂及机械磨细对改善粉煤灰水泥性能的作用进行了理论分析,各种促进     

聚苯乙烯球与大掺量粉煤灰水泥基复合制备轻质多孔墙板的研究

现采用高性能粉煤灰活性激发剂技术，研制成了粉煤灰掺量达７０％的粉煤灰－水泥－矿渣－石膏系统的新型复合水泥基材。采用了表现密度３５ｋｇ／ｍ＾３的发泡聚苯乙烯球为轻集料，在成型工艺上采用表面活性剂和裹浆加压成型技术，解决了界面粘结不好和物料分层现象。从而研制了大掺量粉煤灰聚苯乙烯球复合新型轻质多孔墙板。该墙体材料容重仅为５７５ｋｇ／ｍ＾３，并具有良好的保温，隔热性能，各项性能指标达到，超过了有关标准要     

高性能矿渣胶凝材料的试验研究

通过试验，选择出Ｊ２型激发剂掺量为矿渣重量的１０％，ｍｗ／ｍｓ为０．２７５，塑性成型，标养１ｄ＋沸煮６ｈ的工艺条件，较容易地制备出抗压强度高达１２０～１５０ＭＰａ的碱矿渣高性能水泥基材料，其水化产物主要是低Ｃ／Ｓ比的Ｃ－Ｓ－Ｈ凝胶。     

煤矸石水泥复合体系强度的化学激发

以正交设计实验法研究了Ca(OH)2、CaSO4.2H2O和NaOH等激发剂对煤矸石水泥复合体系早期强度的影响。结果表明:加入激发剂可以大幅度地提高煤矸石水泥复合体系的3天、7天早期强度;适当掺量的激发剂对复合体系的后期强度也有促进作用。依据实验结果,最佳的Ca(OH)2、CaSO4.2H2O和NaOH激发剂掺量分别为2.5%,4.0%,0.5%。另外,对激发剂对体系强度影响的机理进行了探讨。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-