骨架密实型水泥稳定碎石混合料试验研究

文章介绍了骨架密实型水泥稳定碎石混合料配合比设计的基本思想及方法.通过室内试验,证明骨架密实型水泥稳定碎石能够提高基层强度,改善基层抗裂性能.通过试验路研究表明,骨架密实型水泥稳定碎石沥青路面具有良好的力学性能和使用品质.     

抗裂型水稳碎石基层配合比设计及实例应用分析

通过优化规范中的常规级配,拟定抗裂型水泥稳定碎石级配组成,分析级配组成设计中所需原材料的规格、要求,通过室内试验对抗裂型水稳的最佳含水率、最大干密度、无侧限抗压强度予以确定。该文结合具体的工程实例,阐述了抗裂型水稳碎石基层应用到试验路中的具体过程,以及其在抑制裂缝发生、延缓裂缝发展方面的作用优势,总结了科学有效的施工质量控制方法。     

公路水泥稳定碎石基层的配合比设计与施工技术

水泥稳定碎石基层的配合比设计也称材料组成设计,它是路面设计的重要组成部分。通过配合比设计使混合料能达到规定的技术要求。同时,配合比设计又是施工质量管理的重要内容。混合料组成的选择必须使其具有合适的强度和耐久性;具有较小的收缩变形和较强的抗冲刷能力;贯彻就地取材,便于施工,技术可行,经济合理的设计原则。本文主要结合某公路工程的案例,对水泥稳定碎石基层的配合比设计和施工技术做了探讨和阐述。     

浅析水泥稳定碎石基层裂缝防治

文章结合工程实际,从基层水泥稳定碎石施工的原材料、配合比设计、拌和及摊铺、成型碾压、养生等方面分析了水泥稳定碎石基层裂缝产生的原因,并提出了相关对策,以保证施工质量。     

水泥稳定碎石基层施工质量控制

半刚性基层由于具有强度高、承载力大、良好的抗疲劳性能和抗冲刷性等优点,已经成为我国高等级道路沥青路面的主要结构类型.结合工程实际,从原材料、配合比设计、施工工艺及施工过程控制等方面探讨了水泥稳定碎石基层施工质量控制.     

抗裂型水泥稳定碎石配合比设计及路用性能研究

为了提高水泥稳定碎石的抗裂能力,选取广东省佛山地区花岗岩集料,通过大量室内试验进行了抗裂型水泥稳定碎石混合料的配合比设计和路用性能分析.首先,采用两级干捣试验根据骨架间隙率合理极小值获得了三档粗集料的最佳配比,并采用i法和CBR试验得到了CBR值最大的细集料密实级配.其次,采用7d无侧限抗压强度试验,确定了强度最大的粗细集料最佳配比,由此提出了骨架密实结构的抗裂型水泥稳定碎石混合料的设计级配及最佳水泥剂量.最后,通过路用性能检验,并与施工规范悬浮密实级配进行了对比,结果表明,设计级配的各项路用性能均明显优于规范级配.因此,所提出的骨架密实结构水泥稳定碎石混合料具有优良的抗裂性能,可应用于工程实际.     

水泥稳定碎石基层施工工艺与质量控制

结合G212线临罐段公路地震灾后恢复重建工程水泥稳定碎石基层的施工,简述了水泥稳定碎石基层的特点,从原材料、施工前测量、配合比设计、拌和、摊铺、碾压、养生等方面探讨了水泥稳定碎石路面基层结构的施工工艺和质量控制,提出了施工过程中应注意的问题,从而为提高路面的施工质量奠定基础。     

水泥稳定粒料基层（底基层）影响因素与施工质量控制

本文结合作者的施工经验,阐述了水泥稳定粒料路面基层（底基层）,施工,并从原材料试验、配合比设计、施工工艺及质量控制等方面分析了影响水泥稳定粒料路面基层（底基层）的施工质量的因素,提出施工注意事项及质量控制措施。     

水泥稳定碎石全厚式摊铺施工质量控制

本文结合贵阳环城高速西南线水泥稳定碎石基层工程实践,论述了全厚式水泥稳定碎石基层的材料控制、配合比设计以及施工质量控制,为全厚式水泥稳定碎石基层大面积推广提供了必要的参考和借鉴。     

小议水泥稳定碎石基层骨架密实结构配合比

水泥稳定碎石基层具有强度高、稳定性好以及刚度大等特点,因而被广泛应用。本文主要阐述水泥稳定碎石底基层混合料原材料控制,骨架密实结构配合比设计方法,结合配合比在施工中的实践为依据,然后提出工程合理建议级配,理论联系实际,提出优化配合比设计的几个途径。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that