防火堵料的研究现状及发展趋势

综述了防火堵料的种类、性能和用途,介绍了防火堵料的原料研究及生产工艺,并分析现有技术所存在的优缺点,指出了防火堵料的发展趋势.     

防火堵料

本文综述了防火堵料的种类、特性和应用,介绍了防火堵料的研究及生产工艺。     

氢氧化铝对无机防火堵料阻燃性能的影响

针对目前无机防火堵料向轻质、隔热和高强化方向发展的要求,实验研究了氢氧化铝阻燃剂对无机防火堵料阻燃性能的影响。温度范围50～800℃,升温速度20.00℃/min,空气流量25.0mL/min。通过对无机防火堵料的性能测试,并结合热重—差热分析和扫描电镜分析得知,采用氢氧化铝为阻燃添加剂可以改变无机防火堵料的初凝时间,但不会降低无机防火堵料的抗压强度。氢氧化铝的最佳用量为10.2%。     

有机防火堵料使用寿命研究

以在工业消防领域使用中的有机防火堵料为研究对象,对其理化性能和耐火性能进行分析测试,研究有机防火堵料的性能与环境、使用年限的关系.得到良好使用环境、一般使用环境、恶劣使用环境下防火堵料使用后的耐火性能变化情况,探索有机防火堵料的使用寿命.     

浅谈电缆防火材料

电缆防火材料包括有机防火堵料、无机防火堵料、防火包、防火隔板、电缆防火涂料等，防火性能好，使用方便。文章阐述了电缆火灾的原因、电缆燃烧的特性及危害、常用电缆防火材料以及电缆防火材料的选用标准。     

新型粘结剂YDN-1——有机防火堵料专用

上海德律风永兴消防技术有限公司邀请有关院、所 ,经过长期研究开发 ,2 0 0 1年推出了全新概念的有机防火堵料专用粘结剂 ,使有机防火堵料的产品质量、生产工艺、生产成本、环境保护等各方面都得到了改善。经过全国各地许多有机防火堵料专业生产单位两年多使用 ,反映良好。采用     

无卤膨胀型有机防火堵料的研制与应用

介绍了一种新型、环保无卤膨胀有机防火堵料 ,探讨了无卤膨胀阻燃技术的作用机理 ,阐述了该新型有机防火堵料的阻燃机理、生产工艺、理化性能指标及其应用     

建筑石膏在无机防火堵料中的应用

胶凝剂是影响无机防火堵料性能的重要因素.采用氢氧化铝和高铝水泥为防火剂,建筑石膏为胶凝剂,膨胀珍珠岩、高岭土和滑石粉为填充料,制备了无机防火堵料,研究了建筑石膏的用量对初凝时间、抗压强度和耐火性能的影响,并探讨其作用机理.结果表明,建筑石膏的用量在45%左右时,无机防火堵料的性能最佳.     

新型防火封堵材料

公安部天津消防科研所研究成功“塑性防火堵料”和“防火枕”两种新型防火封堵材料,应用效果良好.“塑性防火堵料”是由有机粘合剂、增塑剂、阻燃剂、无机耐火填料等混合     

上海德律风永兴消防技术有限公司产品简介

上海德律风永兴消防技术有限公司是一家专门从事消防设施工程专业承包、防火材料生产的消防企业。该公司技术力量雄厚,生产设备先进,经多年的研究开发,生产出了新一代的防火系列产品。其中,主要包括：WQB-S无机轻质防火板、WDB无机防火板、YDN-Ⅱ有机防火堵料专用新黏结剂、YFD型有机防火堵料、WFD无机防火堵料、PFD型防火包等。另外,该公司正在开发并完成中量试验近期即可推向市场的新产品有：YJP-450凝固型膨胀防火密封胶、RXP-Ⅰ型膨胀阻火带等。其详情如下：     

室内装饰艺术的材料美

介绍了室内装饰材料特质，并对室内装饰材料的选用进行了探讨，阐述了室内装饰材料的几种艺术表达形式，着重对两大种类装饰材料——软性材料和硬性材料的性状、特征及其材质美的开拓进行了分析，以使材料与艺术完美的统一理念充分表达出来。     

Comparison of low-cost and engineered materials for phosphorus removal from organic-rich surface water

Excess phosphorus (P) in lakes and rivers remains a major water quality problem on a global scale. As a result, new materials and innovative approaches to P remediation are required. Natural materials and waste byproduct materials from industrial processes have the potential to be effective materials for P removal from surface water. Advantages of natural and waste byproduct materials include their low-cost, abundant supply, and minimal preparation, especially compared with engineered materials, such as ion exchange resins and polymeric adsorbents. As a result, natural and waste byproduct materials are commonly referred to as low-cost materials. Despite the potential advantages of low-cost materials, there are critical gaps in knowledge that are preventing their effective use. In particular, there are limited data on the performance of low-cost materials in surface waters that have high concentrations of natural organic matter (NOM), and there are no systematic studies that track the changes in water chemistry following treatment with low-cost materials or compare their performance with engineered materials. Accordingly, the goal of this work was to evaluate and compare the effectiveness of low-cost and engineered materials for P removal from NOM-rich surface water. Seven low-cost materials and three engineered materials were evaluated using jar tests and mini-column experiments. The test water was a surface water that had a total P concentration of 132-250 μg P/L and a total organic carbon concentration of 15-32 mg C/L. Alum sludge, a byproduct of drinking water treatment, and a hybrid anion exchange resin loaded with nanosize iron oxide were the best performing materials in terms of selective P removal in the presence of NOM and minimum undesirable secondary changes to the water chemistry.     

Role of reference materials in analysis of environmental pollutants.

This paper discusses the importance and use of reference materials for quality assurance and quality control in environmental analysis. The general classification of reference materials and categorisation of those for chemical composition are presented. The most common reference materials for pollutants in air, water, waste water, soil, sediments, sludge and some biological materials and their producers are tabulated. Definitions, practical recommendations on selection and handling, and application areas of reference materials are also presented.     

Effect of hydrophilic admixtures on moisture and heat transport and storage parameters of mineral wool

Water vapor diffusion coefficient, liquid moisture diffusivity, adsorption isotherm, water retention curve, thermal conductivity and specific heat capacity of two new hydrophilic mineral wool materials are determined in the paper. For the sake of comparison, the same parameters are also measured for two hydrophobic mineral wool materials and two mineral wool materials without any specific admixtures. It is shown that the thermal properties of hydrophilic materials and their water vapor transport and storage properties are very similar to common mineral wool but their liquid water transport and water storage parameters are significantly enhanced compared to the reference materials.     

堆石料状态相关三维多重机制边界面模型

堆石料的应力应变特性与材料的密度、压力等状态密切相关。针对堆石料的变形与强度非线性,在临界状态和边界面弹塑性理论框架内,建立了一个堆石料状态相关三维多重机制边界面模型。模型将复杂的宏观变形行为分解为一个宏观体应变机制和一系列空间分布的相互独立虚拟微观剪切机制。每个微观剪切机制包含3个方向的微观剪应力–应变关系和微观应力–剪胀关系。引入一个与密度、压力相关的状态参数,用以统一描述不同状态下堆石料的变形和强度特性。模型包含12个参数,多数具有明确的物理意义。对2种堆石料三轴压缩试验结果进行模拟计算,模型模拟值与试验结果吻合良好,说明模型能够较合理地预测堆石料的应力应变特性。     

新型相变储能技术的应用与发展

概括和评述了相变储能复合材料的制备方法及其研究进展,介绍了相变材料在建筑方面的应用,最后,指出当前存在问题以及目前值得深入研究的课题.     

新疆高寒地区墙体材料现状与发展趋势

介绍了目前新疆使用的主要新型墙体材料及各种材料所具有的特点，阐述了发展新型墙体材料的措施，并指出其发展方向，适于建筑节能的发展趋势。     

高速公路路面组成材料的研究

介绍了高速公路路面组成材料的研究情况，对沥青结合料、粗集料、细集料、填料、纤维稳定剂等各种材料逐一进行了论述，提出了各种材料对高速公路的影响。     

Tough,void-free,flame retardant phenolic matrix materials

Polymer matrix composites may be effective alternatives to steel and concrete in many civil structures due to their anticipated superior environmental stability. However, one major obstacle limiting the use of organic materials in construction is their high combustibility. Phenolic resins are high volume materials widely utilized for many purposes, including structural adhesives, composites, coatings, etc. They are also well known to provide fire resistance in many applications. Normally, their curing process involves reagents which produce volatile by-products such as water, formaldehyde, or ammonia. This feature has severely limited processability and their utilization in void-free structural applications. This paper is focused on a catalyzed epoxy-phenolic reaction utilizing commercially available phenolic resins and liquid epoxies to promote a predominately (50–90% w/w) phenolic network which produces little or no volatiles. Both ductility and flame resistance are enhanced in compositions containing these high phenolic concentrations. The materials appear to have significant potential for adhesives and structural composites, wherein the absence of voids could permit significant new products to be prepared for infrastructure and other applications. Relationships between the chemical and network structures of these materials and their properties are described.