温拌橡胶沥青混合料路面技术试验研究

基于表面活性温拌沥青路面技术平台,进行了温拌橡胶沥青混合料路面试验研究与上海首次工程试点应用,表明温拌橡胶沥青混合料与热拌橡胶沥青混合料性能相近,温拌橡胶沥青路面技术显著降低了橡胶沥青路面生产施工能耗与污染排放,路面具有良好压实特性与使用性能。     

温拌改性沥青混合料在北京长安街路面大修工程中的应用

结合温拌改性沥青混合料在北京长安街路面大修工程中的应用,对温拌改性沥青混合料的路用性能进行了分析,介绍了温拌改性沥青混合料拌和、摊铺及碾压等施工工艺,通过工程实践明确了温拌改性沥青混合料设计施工技术要求。     

温拌橡胶沥青混合料在万柳中路的应用

分析了温拌橡胶沥青混合料的特点,介绍了北京地区温拌橡胶沥青混合料的设计方法和步骤,论述了橡胶沥青的生产,橡胶沥青混合料的拌和、摊铺、碾压等问题。温拌橡胶沥青混合料在万柳中路的成功应用,为其在北京地区的推广积累了工程经验。     

温拌橡胶沥青混合料路用性能研究

在橡胶沥青混合料中加入温拌沥青改性剂,不仅可以有效提高橡胶沥青混合料的施工和易性和路用性能,而且能够减少能源消耗和有害气体、CO2的排放,达到节能减排的目的,符合我国发展资源节约、环境友好的绿色交通的政策要求,同时具有深远的经济和社会意义。以室内试验研究为基础,重点研究了在不同胶粉掺量下的温拌橡胶沥青混合料的路用性能,为以后实际工程作参考。     

TOR温拌橡胶沥青混合料配合比设计研究

介绍了外掺剂TOR对橡胶沥青的影响,分析了TOR对不同胶粉掺量橡胶沥青性质的影响,并选用温拌橡胶沥青,进行了SMA-13的配合比设计,通过对温拌橡胶沥青混合料的路用性能进行总结,指出了TOR温拌沥青混合料具有广阔应用前景。     

不同温拌剂对温拌橡胶沥青混合料性能的影响研究

选用了Evotherm-DAT、Evotherm-3G、Sasobit、56号石蜡和Aspha-Min温拌剂制备温拌橡胶沥青混合料;通过马歇尔试验和旋转压实试验分析温拌橡胶沥青混合料的和易性以及确定最佳沥青用量;通过一系列机械性能试验,分析温拌橡胶沥青混合料的各项性能.结果 表明:所用温拌剂都能将温拌橡胶沥青混合料的生...     

温拌橡胶沥青混合料设计方法与工程应用

在国内外温拌沥青技术及橡胶沥青技术应用研究的基础上，采用脂肪族酰胺类化合物及芳烃油研制的橡胶沥青温拌改性剂，对温拌橡胶沥青混合料进行配合比设计，并对其性能进行实验。研究结果表明：采用橡胶沥青温拌改性剂对沥青路面性能提高具有更好的综合效果，其降温幅度最大，同时也保证混合料性能；在试验路上使用后，检测压实度为97．6％，大于国家规范的要求值97％。     

发泡沥青WMA技术应用的探讨

文章通过分析沥青混合料温拌技术的发展和基础研究,提出了发泡沥青WMA技术在我国间歇式沥青搅拌站生产应用中需要研究的主要方向.包括:配套沥青发泡设备参数设置和工艺,通过发泡沥青温拌混合料路用性能和耐久性试验分析,结合路面结构力学分析,研究温拌发泡沥青混合料的应用范围;探讨适合我国工程实践推广应用的温拌发泡沥青混合料生产和...     

温拌再生沥青混合料的路用性能研究

针对温拌再生沥青混合料的力学性能、高温稳定性能、低温抗裂性能、抗水损害性能以及抗疲劳耐久性能等对其进行了路用性能评价,得出温拌再生沥青混合料的抗压强度、弹性模量与同级配的热拌沥青混合料相当,温拌剂可以有效提高70号沥青的动稳定度等结论。通过试点工程建设,验证了温拌再生沥青混合料路面满足面层技术要求,试验路段与生产路段检测结果基本一致,温拌再生沥青混合料路面和热拌新混合料路面模量状况相当。     

温拌沥青混合料技术在国内外的发展与应用

随着举国瞩目的北京长安街大修工程的开始，各相关部门及专家对大修中所采用的路面结构、材料、设备等一系列方案都给于了充分的讨论和论证，工程拟采用的新型环保材料也受到了各方的密切关注，这其中就包含了温拌沥青混合料技术。     

污泥制砖存在问题浅析

污泥制砖符合国家的环保政策,但在技术方面还待进一步创新和突破。为此分析了污泥制砖在技术方面、环保方面和社会大众认可方面存在问题及相应的改进措施。     

干旱区绿洲环境下的新疆小城镇建设投资

一、研究区域基本现状新疆地处欧亚大陆腹地,地貌轮廓表现为“三山夹两盆”,山地与平原的面积大致各占50%,镶嵌于戈壁沙漠的绿洲仅有7万平方公里。新疆土地面积166.49万平方公里,占全国总面积的六分之一。气候干旱,荒漠广布,是中国最大的干旱区,是亚洲干旱核心区,也是世界上著名的干旱区之一。水资源短缺,生态极度脆弱。新疆2004年底有1950万人,人均GDP已经超过了1000美元,城镇化进入了快速发展阶段,特别是小城镇的发展速度较快。但新疆特殊的干旱区绿洲环境,使得小城镇的发展存在许多问题。一是城镇规模小而散,基础设施配套差,城镇集散和…     

Levels of manganese in the urine of female farmers in non-polluted regions in Japan

Nearly 1500 urine samples were collected from female farmers in eight regions widely scattered in the islands of Japan in the winter of 1987-1988. The samples were analysed for manganese by wet ashing and flameless atomic absorption spectrophotometry under strict quality control. The values observed after adjustment for a specific gravity of 1.016 were distributed log-normally with a geometric mean of 0.65 microgram/l and a geometric standard deviation of 2.47. There was no effect of aging or any effect of smoking on the urinary manganese concentration. The inter-regional difference may be present but not yet conclusive. As no sex difference was observed in a previous study, it may be possible to deduce that the value may possibly stand for the "background" level of both men and women, either smoking or non-smoking, among the general Japanese population. The observed value is discussed in comparison with values reported in the literature.     

Typification of Fires in Buildings in Spain

Although the Dirección de General de Protección Civil (DGPC), an agency of the Spanish government, has been responsible for the collection of data and the statistical analysis of fires since 1985, it has not as yet issued any reports. It is true that a couple of studies have been made, but in neither case did they use a standardized methodology but relied simply on the heterogeneous information provided by the fire brigades which cooperated in the studies. At that time Spanish fire brigades did not have special units for professional fire investigation, nor was the information derived from standardized methodologies suited to research purposes. In addition, information was extremely scarce and basic, focussed only on the fire, the use of the building and personal data of the victims. In this context, the project for a Fire Investigation Unit in the Fire Brigade of Málaga (the sixth largest Spanish province in inhabitants) was set up. Although inspired in the methodologies used in the USA and in the UK, the aim was to create a customized methodology for the first scientific investigation of fires in Spain. Our research was conducted in 2007. Using the methodologies of the USA and the UK, our own methodological approach and the Spanish regulations, we drew up a questionnaire with 110 variables arranged into 6 modules. We studied 96 fires out of the 154 emergency fire calls received in 2007, having omitted some emergency calls for various reasons. Our results revealed that it was necessary to generalize the installation of fire extinguishers in residential buildings, to train the general public in the use of these devices, to promote the use of fire and smoke detectors in residential buildings, to encourage the inspection and control of old electric installations and to monitor the new installations, to generalize the implementation of emergency and evacuation plans and to design new systems and materials for the cabinets where hand-held extinguishers are stored.     

分光光度法测水中余氯

介绍了用双硫腙分光光度法测定水中余氯的新方法，阐述了其测定试验过程，根据试验结果显示，其结论符合国家标准，表明该方法可用于自来水等样品中余氯含量的测定，结果比较准确。     

Intersections of inequality in homeownership in Sweden

Abstract

Inequalities relating to ownership of housing have become a major issue de jour in many Western societies. This article examines how the distribution of homeownership in Sweden relates to two factors widely seen as significant to such inequalities, namely parental tenure status and place of birth. We use longitudinal registry data to examine the bearing of these two factors on individual-level tenure progression since the beginning of the 1990s for persons at different stages of their housing careers. We extend existing understandings of Swedish homeownership patterns by demonstrating that inequalities relating to place of birth and parental tenure intersect with one another in ways that substantially advantage certain subgroups while disadvantaging others, and by demonstrating that experiences of entry into homeownership have in recent years been changing in markedly different ways for these different subgroups. Overall, Swedish homeownership inequalities, far from dissipating, appear to be hardening along existing lines.     

莳花在城市绿化中的应用

目的:花化、香化、彩化已成为城市园林绿化的主要趋势,也是为满足人们对环境要求越来越高的一种心境。方法:选择采用莳花能表现出品种繁多,色彩艳丽等不同的方式,从而能在很大程度上丰富了植物造景的层次感要求。结果:能使其达到美化环境、增添节日气氛、提高绿化品质等方面有着突出的作用。结论:莳花造景对城市的美化可达到立杆见影效果,从而提高城市的形象和品位。     

日本城市浅层地下空间利用的新成就

本文结合日本川崎市站前广场和神户市哈巴兰德地区的立体化再开发，分析介绍当前日本浅层地下空间开发利用的成就和特点。     

遗传算法在边坡稳定系数计算中的应用

边坡稳定性的关键问题是确定最危险滑动面(潜在最危险滑动面)和边坡的稳定系数。国内外一般是采用先假定边坡滑移模式,然后近似确定最危险滑动面,再求近似的边坡稳定系数的方法来分析边坡的稳定性,但假设的边坡滑移模式难以反映边坡滑移的实际状态。因此本文探索利用遗传算法搜索最危险滑动面,并得到最小稳定系数及对应的最危险滑动面曲线,取得了较好的效果。     

地质情况复杂地区高速公路隧道地质预报研究

针对地质情况复杂地区垫邻高速公路设计、施工中的具体问题，从地质预报的方法、原理方面入手，对地质情况复杂地区高速公路隧道施工中的地质超前预报工作进行了深入的研究，在分析归纳的基础上，提出合适的工作方法。