Wind load resistance of modified bituminous roofing systems

Wind effects on roofing systems are dynamic, because of wind's fluctuation in time and space. Therefore a dynamic means of evaluating roofing systems is beneficial for identifying the component in a roofing system that has the weakest resistance against wind uplift forces. The Special Interest Group for Dynamic Evaluation of Roofing Systems (SIGDERS) commissioned a unique North American roofing facility, which has been used to evaluate a mechanically fastened modified bituminous membrane roof system under three different test methods: the Factory Mutual FM-4470 static test standard, the UEAtc (European Union of Agreement) procedure, and the SIGDERS-developed dynamic load cycle. Comparison of the results of these tests shows that UEAtc and SIGDERS tests produce failure modes similar to those observed in the field. The SIGDERS load cycle was completed in much less time than the UEAtc procedure.     

The strength, elongation and toughness of fresh and weathered bituminous roofing membranes

The author describes in detail, complete with diagrams and test data, the procedures adopted and results obtained. The main problem involving the elongation of the membranes is the large difference between the elongation of the polyester-fibre-based modified bituminous membranes, and the elongation of the glass-fibre-based oxidized bitumen membranes.     

APP改性沥青屋面卷材现场功能调研综述

如今，改性沥青防水卷材已经处于成熟阶段。这种材料可用于各种屋面结构和在极其高温和低温气候条件下使用，因而老化性能是此类材料最重要的性能指标之一。加速老化试验的方法在世界各国不尽相同，试样在加速老化试验箱内的时间可以从4至24个星期不等，温度变化在70～80℃之间。有些采用QUV(石英紫外光)，有些则倾向暴露于氙气中。     

屋面卷材渗漏的检测方法

低坡卷材屋面系统的渗漏位置很难查找，因为系统内的渗漏水是流动的，使得建筑物内的渗漏位置并不一定与屋面上的渗漏点相对应。     

沥青类防水卷材检测中几个问题的探讨

介绍了沥青类防水卷材盲样检测中所遇到的障碍及造成的主要原因;提出了几种鉴别沥青类防水卷材的方法;探讨了沥青类防水卷材标准中几个检测指标的有关问题。     

大力推广改性沥青热玛Di脂粘结卷材技术

简述改性沥青热玛Di脂粘结卷材的优点,提出推广该技术应解决产品研制开发,产品标准制定、研究配套施工机具等问题。     

2006年美国屋面工业现状调研报告

美国RSI杂志对2006年的屋面工业现状进行了问卷调查．现简要报道如下。 1 商业（低坡度）屋面 1．1新建屋面市场比例（按2006年营业额计算）     

Response of pierced fixed corrugated steel roofing systems subjected to wind loads

The low-cycle fatigue response of corrugated metal roof cladding to fluctuating wind loads was studied by subjecting cladding specimens to a series of static, cyclic and simulated “real” cyclonic wind loads using a Pressure Loading Actuator (PLA), and measuring fastener response using a x–y–z load cell. The overall performance of cladding including crack initiation, propagation and patterns, and cycles to failure was found to be similar to previous tests that used line-loads to simulate wind pressure. The reaction at a fastener to spatially varying pressures was assessed by analysing the influence coefficients, to show that it is predominantly influenced by local loads acting along the screwed crest. In addition, the response of roofing specimens subjected to fluctuating cyclonic wind pressures replicated failures observed in the field. The fastener response varied with the load level and the response spectrum followed the wind load spectrum up to 5 Hz even with deformation and cracking of the cladding showing that these higher frequency wind “load cycles” were transferred into the supporting structure via the fastener.     

彩色板岩覆面改性沥青防水卷材

在要求防水材料经久、耐用的同时,追求工程设计多样化、色彩化,使屋面防水材料美观起来是一种新的时尚。开发研制一种既具防水功能,又具美化装饰功能的防水材料,是摆在我们建筑防水行业科研工作者面前的新课题。 1998年,辽宁盘锦禹王防水建材集团经过广泛深入的市场调查, 在科研人员的努力下,于同年 10月份开发出了一种改性沥青彩色板岩覆面防水材料。产品一经投放市场,便广受青睐。 1 改性沥青彩色板岩覆面防水卷材的特点 改性沥青彩色板岩覆面防水卷材的物理性能如下： 柔度：－ 5～－ 25℃ 耐热度： 90～ 130℃ 拉力： 纵向 3…     

SBS改性沥青混合料的施工控制要点

从施工温度要求、施工前准备工作、混合料拌合质量控制、摊铺、压实、接缝处理等方面介绍了SBS改性沥青混合料的施工控制要点，以保证改性沥青路面的安全、高效运营。     

2003年美国屋面工业的调研简介

2003年12月美国《RSI》杂志刊登了一篇题为“复苏开始了——记2004年屋面工业状况”，涉及屋面工业的方方面面，读者可以从中对美国屋面工业现状有个较为广泛的了解。     

电子称重在改性沥青卷材配料系统中的应用

利用电子称重系统对改性沥青防水卷材项目配料中高温基质沥青的重量进行测量和控制,具有测量精度高,使用方便、测量结果直观等优点,介绍了电子称重系统在新疆某条卷材生产线建设项目中的应用情况。     

Spherical membranes subjected to concentrated loads

Using linear membrane theory, the contours and size of reinforcements required for spherical inflatable membranes to carry tangential, normal and oblique concentrated forces, by means of a tension field and without wrinkling, is considered. Load limits for such wrinkle-free behaviour of this class of structure are established. In the second part of the paper, nonlinear membrane equations, written with respect to the deformed configuration, are used to establish the wrinkled deformation field of spherical inflatables subjected to axisymmetric normal concentrated forces without the use of reinforcements. The ponding problem for such membranes, a possible mode of failure when concentrated forces are applied in the presence of an accumulating ponding medium, is defined and the conditions for a safe ponding process specified in terms of membrane geometry, internal inflation pressure and density of the ponding medium.     

如何选择SBS防水卷材胎基的规格型号？

在选择SBS改性沥青防水卷胎基的具体规格品种上,目前尚无统一的技术规范,因而较混乱,本文通过实验从技术、经济两方面对如何正确选择SBS防水卷材胎基的具体规格品种进行分析研究,并提出规律性的结论。     

改性沥青防水卷材生产工艺过程控制分析

~~改性沥青防水卷材生产工艺过程控制分析$禹王集团技术开发处     

《沥青基防水卷材用基层处理剂》标准解读

行业标准《沥青基防水卷材用基层处理剂》的编制,除了考虑其影响防水卷材工程质量的一些指标外,还特别考虑了其环保的指标。介绍了该标准的主要内容。     

带自粘层改性沥青防水卷材在宋家庄车站中的应用

介绍了带自粘层改性沥青防水卷材的结构和性能,并以宋家庄车站的防水设计为例,介绍了带自粘层改性沥青防水卷材的施工工艺、施工要求及注意事项。     

SBS改性沥青混合料配合比设计及施工技术

结合工程实例,对沥青混合料的配合比设计进行了阐述,并对其设计过程中的注意问题进行了说明,论述了SBS改性沥青的施工技术要求,供类似工程参考借鉴。     

Durability of the adhesion between bituminous coatings and self-protection mineral granules of waterproofing membranes

Flat roofs in current buildings include a waterproofing system, often made of bituminous membranes with a self-protection constituted by mineral granules. These granules constitute the barrier against the fundamental environmental agent of degradation, the UV radiation. Therefore it is of paramount importance to understand the long-term performance of the self-protection layer, namely its adhesion to the coatings of bituminous membranes. This paper presents an experimental study on the behaviour of the self-protection granule of bituminous membranes when subjected to environmental agents of degradation. Different types of atactic polypropylene (APP) and styrene–butadiene–styrene (SBS) modified bituminous membranes, comprising different finishing systems, were exposed to the effects of elevated temperature and water for up to 24 weeks and 4 weeks, respectively. Following accelerated ageing, specimens of the different types of membranes were subjected to brushing tests, carried out according to EN 12039, in order to evaluate the adhesion of the self-protection granules. The results obtained in this study, which are compared with performance limits recommended by UEAtc directives, show that the higher loss of self-protection granule of bituminous membranes occurs in membranes modified by APP polymers. In addition, it was concluded that the effect of water is much more severe than that of elevated temperature.