防水卷材沥青烟气治理技术

分析了沥青类防水卷材生产工艺及烟气排放特点,介绍了几种常用的沥青烟气处理技术,包括吸附法、静电法、燃烧法、等离子体法等;并指出沥青烟气处理应采用组合式装置,建议防水卷材行业沥青烟气治理分预处理、恶臭脱除、深度处理三步实施。     

我国建筑防水材料生产和应用现状及发展

我国建筑防水材料通常分为五大类 ,即 :沥青基防水卷材 (包括改性沥青防水卷材 )、合成高分子防水卷材、防水涂料、密封材料和刚性防水材料。我国从 50年代开始应用沥青防水卷材以来 ,沥青类防水材料一直成为我国建筑防水的主导材料。随着建筑业的发展 ,建筑防水材料无论是品种、质量还是产量都得到迅速的发展。就目前我国建筑防水材料总体结构比例上看 ,仍是以沥青基防水材料为主要产品 ,占全部防水材料的 84 % ,高分子防水卷材占 6 % ,防水涂料占 10 %。1　中国建筑防水材料现状1.1　沥青基防水卷材概况沥青基防水卷材主要包括有沥青纸胎…     

建筑防水新技术综述(二)——防水材料

一、防水卷材 按原材料性质分类的防水卷材主要有:沥青防水卷材、高聚物改性沥青防水卷材和合成高分子防水卷材三大类。其分类和常用的品种见图1。 (一)沥青防水卷材 沥青防水卷材的传统产品是石油沥青纸胎油毡。按油毡胎体单位面积重量分为200号、350号、500号三种规格;按物理性能不同分为优等品、一等品与合格品三个等级。其中350号油毡的合格品是我国纸胎油毡中产量最大、应用最多的一个大宗产品。这种油毡由于沥青和胎体材料性能的限制,低温     

不同施工方法对改性沥青类防水卷材接缝剥离强度的影响研究

通过近年来建材行业抽查结果看,沥青类防水卷材接缝剥离强度不合格率较高,且各地区对沥青类防水卷材施工的政策不统一,这对工程中卷材搭接施工方法的选择造成困难。本文研究了热熔焊接、热风焊接、冷粘搭接三种不同搭接施工方法对卷材接缝剥离强度的影响,从而为沥青类防水卷材施工工艺的改进提供参考。     

非固化橡胶沥青防水涂料产品粘结性能研究及探讨

本文对比了非固化橡胶沥青防水涂料对几种常用的防水卷材的剥离粘结性,探讨了非固化橡胶沥青防水涂料的粘结特性,结果表明使用非固化橡胶沥青防水涂料可实现满铺粘结,与沥青类防水卷材粘结效果最好,合适的拌和温度可以提高初期的粘接强度,保油性好的产品可以更好地保障涂料的使用寿命。     

沥青防水卷材生产过程中大气污染物的检测研究

探讨了环保要求下沥青防水卷材生产过程中需要关注和检测的环境排放因素,对现有的检测标准和方法进行了对比总结,确定了需要开展检测的点位和检测物种类,提出了适用于沥青防水卷材生产过程中大气污染物的检测技术方案,并对典型沥青防水卷材生产企业开展了试点检测,对低烟沥青的应用效果进行了考察。     

行业新闻

建筑防水卷材准入条件利好行业发展日前,工信部发布《建筑防水卷材行业准入条件(征求意见稿)》,主要内容有:1)严禁新建和改扩建传统沥青基防水卷材等生产项目,逐步淘汰沥青复合胎柔性防水卷材。2)新建和改扩建改性沥青类防水卷     

浅谈自粘防水卷材

自粘型防水卷材根据目前市面上的产品类型大约可分为三大类：自粘橡胶沥青防水卷材、自粘聚合物改性沥青聚酯胎防水卷材和高分子自粘复合防水卷材。     

建筑防水材料品种及市场预测

目前,我国建筑防水材料基本分为四大类,即防水卷材类(有胎类),防水片材类(无胎类),防水涂料类,防水油膏类,现将这四大类中主要品种、价格、性能、优点和不足,市场预测综述如下:一、防水卷材类防水卷材的发展方向,目前仍以普通沥青     

自粘橡胶沥青防水卷材大小辊成型技术装备发明专利介绍

分析了刮涂成型和对辊成型这两类传统自粘橡胶沥青防水卷材成型工艺设备存在的不足,介绍了发明专利自粘橡胶沥青防水卷材大小辊成型技术装备的工艺组成和优点.     

索与膜材间摩擦系数试验研究

进行索膜结构分析时应该考虑索膜间摩擦力的影响,而要考虑摩擦力一般就要用到摩擦系数。鉴于目前仍缺少索膜间摩擦系数的相应资料,考虑工程实际应用情况,选用部分具有代表性的膜材进行了索膜间摩擦系数试验,给出了可应用于工程分析的建议值。     

Effect of membrane configuration on bench-scale MF and UF fouling experiments

Hollow fiber and flat sheet membranes were compared in side-by-side bench-scale experiments to evaluate whether the configuration has an impact on the rate of membrane fouling. Both microfiltration (MF) and ultrafiltration (UF) membranes were evaluated. In general, flat sheet membranes fouled more rapidly than hollow fiber membranes. Pretreatment such as coagulation generally affected both configurations similarly, but in some cases coagulation reduced fouling on hollow fiber membranes but increased fouling on flat sheet membranes. Prefiltration to remove foulants above 1microm in size had a consistent effect on both configurations. A bench-scale apparatus employing a single-fiber module that allows testing over multiple filter runs with integral backwashing capabilities was demonstrated to provide more detailed information about fouling, which can be applied to full-scale applications. When bench-scale tests are to be used to screen treatment options for full-scale applications, the use of a backwashable hollow fiber system is recommended.     

为提高我国改性沥青卷材的质量建言献策

分析了我国改性沥青防水卷材生产与应用中存在的问题以及与国外相比存在的差距；提出提高我国改性沥青卷材质量的几个建议，涉及胎体、改性材料、粘接方法、质量保证等诸多方面。     

Pressurized, nonlinear membranes with proportional stresses

The geometrically exact, axisymmetric equations for some general nonlinearly elastic membranes are examined in the case of constant internal pressure. Particular attention is paid to the scenario wherein the hoop stress is proportional to the meridional stress.     

Selective permeation of moisture and VOCs through polymer membranes used in total heat exchangers for indoor air ventilation

Fresh air ventilation is central to indoor environmental control. Total heat exchangers can be key equipment for energy conservation in ventilation. Membranes have been used for total heat exchangers for more than a decade. Much effort has been spent to achieve water vapor permeability of various membranes; however, relatively little attention has been paid to the selectivity of moisture compared with volatile organic compounds (VOCs) through such membranes. In this investigation, the most commonly used membranes, both hydrophilic and hydrophobic ones, are tested for their permeability for moisture and five VOCs (acetic acid, formaldehyde, acetaldehyde, toluene, and ethane). The selectivity of moisture vs. VOCs in these membranes is then evaluated. With a solution-diffusion model, the solubility and diffusivity of moisture and VOCs in these membranes are calculated. The resulting data could provide some reference for future material selection. PRACTICAL IMPLICATIONS: Total heat exchangers are important equipment for fresh air ventilation with energy conservation. However, their implications for indoor air quality in terms of volatile organic compound permeation have not been known. The data in this article help us to clarify the impacts on indoor VOC levels of membrane-based heat exchangers. Guidelines for material selection can be obtained for future use total heat exchangers for building ventilation.     

当前我国防水材料行业发展中存在的几个问题

指出了我国建筑防水行业发展中存在的一些问题，如屋面防水材料与地下防水材料不加区分，改性沥青防水卷材质量呈现明显劣化的趋势．高分子防水卷材发展偏离方向等等，以期引起行业人士的重视。     

Relationship between types of surface shear stress profiles and membrane fouling

Shear stress has been recognized as an important parameter in controlling particle back-transport from membrane surfaces. However, little is known of the relationship between transient shear conditions induced by air sparging and fouling control near membrane surfaces. In this paper, the different types of surface shear stress profiles that had beneficial effects on minimizing reversible surface fouling were examined. The relationship between different statistical shear parameters (e.g. time-averaged shear, standard deviation of shear and amplitude of shear) and fouling control that have been used by others were examined as well. It was found that the fouling rate for membranes subjected to transient shear conditions was lower than for membranes subjected to constant shear conditions. The magnitude, duration and frequency of the shear conditions were found to have an impact on the fouling rate of membranes. It was also found that although some statistical shear parameters could generally be used to relate shear and fouling, they were inadequate to relate surface shear stress to fouling, for all transient shear conditions examined.     

节能 环保 绿色 安全——欧洲屋面工业的发展趋势

中国建筑防水代表团访问了欧洲FLL耐根穿刺试验中心及阻根剂、SBS改性沥青卷材、TPO和PVC卷材生产厂,参观了SAIE和BATIMAT建材展会,受益颇多,总结此文,期望对我国屋面工程的发展有所助益。     

动态膜生物反应器在废水处理中的研究

介绍了动态膜生物反应器(DMBR)的分类、基质和动态膜形成;工艺处理的效果;运行的主要影响参数;再生等过程。其中收集了许多国内外学者在该领域取得的研究成果。最后指出了今后尚待深入研究的重点和展望。     

东营万达广场地下室防水工程施工技术

按地下室底板、侧墙和顶板详细介绍了山东东营万达广场地下室采用SBS改性沥青防水卷材的防水施工工艺,重点阐述了后浇带、集水坑、桩头、甩槎部位、接槎部位、穿墙管、顶板立墙交接处等细部节点的防水处理,总结了施工注意事项和防水保护要点。