防水涂料 各司其职

我国的防水涂料年使用量长期以来占防水材料总量１０ %左右 ,其防水覆盖量大致与改性沥青防水卷材相当。在日本 ,防水涂料用量低于沥青基卷材和高分子卷材 ,但品种质量远胜于我国。应用的落后在某种程度上反映了理论的落后。很多资料称防水涂料可以代替三毡四油 ,有的认为防水涂料与防水卷材是各有优缺点的建筑防水材料。据此观点 ,凡用防水卷材的工程应该都可以用防水涂料替代 ,这是造成我国防水涂料用量比例偏高的重要原因。据报道 ,目前我国吃错药的人数约有１０ %,笔者认为 ,用错防水材料的建筑比例会更高一点。１沥青基防水涂料的兴起…     

改性AVE彩色防水涂料的研究

本文介绍了用ＶＡＥ乳液为主要成膜物而制成防水涂料的生产工艺、配比及施工方法，该防水涂料无污染，防水效果好，交可配成各种颜色。     

水乳型PVC弹性防水涂料

本文叙述了水乳型ＰＶＣ防水涂料的原料选择、生产工艺、性能用途，并详细介绍了施工方法和施工注意事项。该涂料保持了ＰＶＣ胶泥与塑料油膏的优良特性，大大改善了施工性能，具有良好的技术经济效益与社会效益。     

新环保型丙烯酸防水涂料施工技术

以铁十二局承建的某高速公路防水工程施工为例，详细介绍了丙烯酸防水涂料材料性能，阐述了其施工工艺及防水经验，经施工实践，取得了良好的社会效益。     

851与彩色聚氨酯防水涂料的区别

８５１与彩色聚氨酯防水涂料的区别秦道川（淮阴聚氨酯防水材料厂２２３００１）聚氨酯（ＰＵ）防水涂料广泛应用于建筑行业，但是由于某些人认识不够，经常把焦油型（８５１）ＰＵ防水材料与纯彩色ＰＵ防水涂料相混淆，其实两者在反应机理上存在着差别，其性能和生产工艺...     

聚合物改性水泥基复合防水涂料

介绍聚合物改性水泥基复合防水涂料的复合机理,讨论了该防水涂料的粉／液比、环境温度、养护龄期和涂膜厚度对复合防水涂料拉伸性能的影响以及在工程应用中的注意事项。     

我国建筑防水涂料的现状与发展趋势

随着当前我国科技水平的不断提高和建筑行业的持续发展,在建筑工程中越来越多的新型防水涂料得到广泛的应用,其不仅可以提高整体的建设效果,还有助于解决在以往建设中存在的渗水问题。文章对防水涂料进行了概述,阐述了我国建筑防水涂料的现状,说明了防水涂料的特点,分析了防水涂料的具体应用,探讨了防水涂料的发展趋势。     

利用合成橡胶防水涂料处理人工干燥室漏雨浸水的一点体会

目前砖瓦厂家为了提高红砖的产量,普遍利用轮窑的余热进行人工干燥。而有的厂家为了减少建厂的造价,人工干燥室顶面没有加盖屋面,防水防漏措施也不得力,一遇到雨季干燥室就出现漏雨浸水,使砖坯造成膨胀疏散,给厂家带来严重的经济损失。为了解决这一问题,我们和贵阳市马王防水材料厂在乌当区东风镇新村联办砖厂对10条人工干燥室的防水防漏问题作了处理,从而解决了漏水浸水问题。通过改造,3年来该厂的产量一直保持在年产3000万块左右,比未技改以前年红砖产量提高了近1000万块,使该厂受益不浅。现将我们的做法和体会介绍如下,供大家参考。 1 原材料     

彩色屋面防水涂料的研制

本文主要介绍采用ＥＶＡ乳液制成的彩色屋面防水涂料的配方，工艺，涂膜性能以及施工方法。     

中国绿道规划建设实践——从提级统筹到制度并轨

绿道在中国经过多年实践发展,在理论内涵、规划选线、综合效益等各方面都已有许多成果支撑.基于可公开获取的一系列文献资料,立足于绿道在中国各省市近20年的具体实践过程,梳理绿道在规划体系中的角色转变、在指标设置中的逐步细化和在管控上的落实方式,总结绿道实践在中国从提级统筹、常态认同到制度并轨3个阶段的发展变化,在展望绿道后...     

城外造景：清末广州景园营造与岭南 园林的近代转型

清末广州中西交汇,景园营造新旧共存互动,推 动岭南园林的近代转型。其中,在繁荣的中西贸易和文化交 流,以及书院文化、士绅文化等的影响下,清末岭南形成了 以广州为中心、十三行行商为代表、官商士绅竞相造园的特 殊历史时期,其造园数量、规模、意匠等均在该时期达到岭 南古典园林发展的巅峰。这一时期也是岭南园林近代转型的 关键时期。在西方文化和清末洋务运动思想的影响下,广州 开始出现洋务花园、公园、市政绿化,以及校园绿地等新型 园林形式。这些具有公共性质的城市景致与新建私园一道广 泛分布在城墙以外,成为清末广州城市空间拓展与风景体系 形成的重要参与者。由于清末广州城外造景的繁荣,从时间 上开启了岭南园林的近代转型,在空间上使岭南园林的地域 性特征得以形成和辨识,其空间性与时间性界定了清末岭南 园林近代转型的物质及文化维度。梳理了清末广州具有代表 性的景园营造活动,在分析其动力机制的同时,探讨城外造 景之于岭南园林近代转型的意义。     

探究“虚实”空间关系，创造个性化的城市空间场所

作者利用空间的“虚、实”概念,结合格斯塔心理学的“图底”关系,类比分析中国水墨画的留白艺术手法及生态系统中的细胞繁衍规律,通过张家界城市绿化广场周边地段的概念设计的创作实践,提出创造个性化的城市空间场所工作中虚实空间的理念与原则目标。     

Alteration of arsenopyrite in soils under different vegetation covers

The weathering of arsenopyrite (FeAsS) has been monitored in soils using an in situ experimental approach. Arsenopyrite in nylon experimental bags was placed in individual horizons in soils in spruce (litter, horizons A, B, and C), beech (litter, horizons A, B, and C) and unforested (horizons A, B, and C) areas and left in contact with the soil for a period of 1 year. The individual areas on the ridge of the Krušné hory Mts., Czech Republic, had the same lithology, climatic and environmental conditions. Scorodite (FeAsO₄·2H₂O) was identified as a principal secondary mineral of arsenic (As) formed directly on the surface of the arsenopyrite. Scorodite was formed in all the areas in all soil horizons. The amount of scorodite formed decreased in the series beech, spruce and unforested areas. In forested areas, there was a larger amount of scorodite on arsenopyrites exposed in organic horizons (litter, A horizon). The greater rate of arsenopyrite alteration in organic horizons in the beech stand compared to spruce stand is probably a result of faster mineralization of organic material with resulting production of nitrate and better seepage conditions of soil in this area. Speciation of As determined using the sequential extraction technique demonstrated that As was bonded in the soils primarily in the residual fractions prior to the experiment. The As content in the mobile fractions increased in the organic horizon in the forested areas after the experiments.     

化学溶液和干湿循环作用下砂岩抗剪强度劣化试验及化学热力学分析

 为研究化学溶液和干湿循环共同作用下砂岩抗剪强度的劣化机制,在不同pH环境下,通过不同干湿循环次数后的单轴、三轴试验,计算出砂岩的黏聚力和内摩擦角,同时得到其与循环次数的关系式,进而获得砂岩在浸泡环境下抗剪强度随干湿循环次数的变化公式。根据砂岩的组成矿物及其百分含量,得到各种主要组成矿物在中性、碱性、酸性溶液中溶解的化学反应方程式,利用化学热力学的基本原理,确定各主要矿物在中性、碱性、酸性溶液浸泡下能否稳定。为了验证分析的正确性,对浸泡溶液中的部分离子(Ca2+,SiO2,Na+,K+)浓度进行测试。结果表明,酸性环境下,砂岩抗剪强度劣化最为严重,碱性次之,中性最轻。在酸性环境中,对抗剪强度影响较大的胶结物主要组成成分(长石、方解石)的性质不稳定,溶解反应能自发进行,而碱性环境中,对强度影响较小的骨料主要组成成分(石英)的性质不稳定,溶解反应能自发进行。酸性浸泡液中,方解石、钾长石、钠长石溶解出的Ca2+,K+,Na+的浓度明显高于中性和碱性液中Ca2+,Na+,K+的浓度,而碱性溶液中,石英溶解出的SiO2的浓度明显高于中性和酸性液中SiO2的浓度,与热力学分析结果一致。     

Health assessment of artisanal gold miners in Indonesia

Small scale miners use mercury to extract gold from ore in many countries. An environmental and health assessment was performed in Indonesia in two regions, Galangan in Central Kalimantan and Talawaan in Northern Sulawesi. The environmental assessment showed severe mercury contamination of the sediments, and increased mercury levels in local fish. For the health investigation 281 volunteers were recruited and examined by a standardized questionnaire, a neurological examination and neuro-psychological tests. A medical score was used consisting of significant factors of mercury intoxication. Mercury exposed workers showed typical symptoms of mercury intoxication, such as movement disorders (ataxia, tremor, dysdiadochokinesia, etc.). Blood, urine and hair samples were taken from any participant and analyzed for mercury. The mercury concentration in the biomonitors was high, partly extreme high in the working population, increased in the population living in the same habitat and low in the control group. By a standard protocol which includes a combination of threshold values of mercury in the biomonitors and a medical sum score the diagnosis of chronic mercury intoxication was made for highly burdened workers (amalgam smelters) in 55% in Sulawesi and in 62% in Kalimantan. Less exposed mineral processors and the general population in the mining areas were also intoxicated to a high percentage.     

Cell phones for the spirits: ancestor worship and ritual economies in vietnam and its diasporas

Religion has been thriving in the Socialist Republic of Vietnam since ??i m?i, the onset of market reforms in the late 1980s. Votive paper offerings, part of spiritual and economic well-being, play a crucial role in performing religious practices in the socialist country as well as among diasporic Vietnamese. In urban Hanoi, material objects made from paper are traded in marketplaces and later burned in the streets, in temples and pagodas, in private yards and other places on special occasions in order to be transmitted to the ancestors. In the past few years, the range of votive paper offerings produced, traded, and sent to the deceased has expanded to include new forms and references to new media. Drawing on recent debates in the role of media in religion and in particular on technologies of mediation, I focus on the use of votive paper offerings in the sociocultural context of the Vietnamese spirit world. I explore how new media and media technologies are embedded in multilayered processes of mediation in Vietnam and its diasporas. Taking religious practices of burning votive paper offerings as an ethnographic example, this essay aims to contribute to ongoing debates on popular religion and the sacred life of material goods in late socialist Vietnam, on its transnational ties, and on the entanglements between religion, media and materiality.     

建筑装饰之我见——建筑外形式的装饰艺术

建筑是一部人类文明史,建筑装饰艺术是其中最精美的语言,它记载着科学技术的发展和文化艺术的进步,它描绘出风土人情与时代风尚。本文主要论述了建筑外形式装饰艺术的涵义及设计要点,对建筑装饰艺术的形态构成、造型与装饰、装饰的视觉效应以及建筑外形式装饰艺术的个性和设计中应注意处理好的关系进行了讨论。     

Rooted in the home garden and in the nation's landscape: Women and the emerging Hebrew garden in Palestine

In the early 20th century, the Hebrew women in Palestine found the fulfillment of their economic, social, and emotional needs in gardening. Their gardens were women's means of shaping their surroundings, mainly in the family sphere but also in the community sphere (school and kindergarten gardens, kibbutz gardens). The project was an outcome of the shared interests of pioneer women, city dwellers, and Jewish women's organizations, which differed in their social status and life goals, yet shared a common fertile ground. Through the investigation of primary and secondary sources that deal with women, gardens and the history of the Zionist settlement in Palestine, this paper argues that planting gardens was the Hebrew women's modest way of creating a 'space of their own', where they nurtured and fostered beauty, productivity, self-esteem, mutual help and friendship, while overcoming class distinction. Meanwhile, in planting gardens, women gained a share in the Zionist nation-building project, which was primarily male dominated.     

冬季空调不加湿对室内参数的影响

基于质量守恒方程导出了冬季空调系统不加湿时房间内的含湿量计算式,综合考虑影响室内含湿量的主要因素,得出冬季空调可以不加湿时应满足的条件,考察了中国典型气候区代表性空调房间冬季空调不加湿时室内相对湿度能否满足设计要求。研究表明:中国各地区的商场,夏热冬冷地区的餐厅及三星级及以下酒店多功能厅,夏热冬暖地区的影剧院、办公室、酒店客房及多功能厅、餐厅,温和地区的办公室、三星级及以下酒店客房、酒店多功能厅及餐厅空调系统不加湿即可达到设计湿度要求;严寒地区及寒冷地区的影剧院、办公室、酒店客房、酒店多功能厅及餐厅,夏热冬冷地区的影剧院、办公室、酒店客房、四星级及以上酒店多功能厅以及温和地区的影剧院、四星级及以上酒店客房等房间的空调系统必须加湿才能达到设计要求。