Distribution of contact pressure over the surface of ceramic floor tiles during the polishing process

Assisted with computational simulation this work quantitatively determined the distribution of contact pressure over the surface of porcelain stoneware tiles during the industrial polishing process. In modern polishing lines there are basically three movements responsible for the scratching velocity and the position of the abrasives. Combining the kinematic equations obtained by these movements with a pre-existing model the contact pressure between abrasive tool and tile surface could be determined as function of time. The spatial distribution of average, standard deviation and maximum values of contact pressure were then obtained and mapped over the entire surface. The simulation results showed that the contact pressure tends to be 50% higher near to the center, in regions worked by the innermost abrasives. Additionally, periodical variations of up to 10% were found to occur due to the partial retreat of the abrasive tool.     

对出口哥伦比亚陶瓷砖标签技术法规的解析

本文主要研究了哥伦比亚对进口陶瓷砖标签要求的技术法规以及涉及的产品标准,并对该法规中的标签要求做了详细的解析。同时,对哥伦比亚在监督、执行和处罚等方面进行了详细阐述。     

DNA Nanoarchitectures: Steps towards Biological Applications

DNA's remarkable molecular recognition properties, flexibility, and structural features make it one of the most promising scaffolds to design a variety of nanostructures. During recent decades, two major methods have been developed for the construction of DNA nanomaterials in a programmable way; both generate nanostructures in one, two, and three dimensions. The tile‐based assembly process is a useful tool to construct large and simple structures; the DNA origami method is suitable for the production of smaller, more sophisticated and well‐defined structures. Proteins, nanoparticles and other functional elements have been specifically positioned into designed patterns on these structures. They can also act as templates to study chemical reactions, help in the structural determination of proteins, and be used as platform for genomic and drug delivery applications. In this review we examine recent progresses towards the potential use of DNA nanostructures in molecular and cellular biology.     

利用炼铜废渣生产彩色地砖

利用炼铜废渣 (诺砂 )研制开发了彩色地砖产品。概述了诺砂的组成及特性 ,介绍了彩色地砖的生产工艺过程。     

陶瓷墙地砖胶粘剂行业标准的编制及实施意义

陶瓷墙地砖胶粘剂行业标准即将颁发，为配合该标准实施，介绍了标准的编制和实施意义。     

陶土板幕墙系统特性及应用

本文主要介绍了一种新的建筑外立面装饰材料系统--陶土板幕墙.文中描述了陶土板幕墙在外观、性能上的特点,介绍了陶土板幕墙的类型及其安装系统.     

明代琉璃瓦、兽件分析

明代建筑不但大木、斗栱的做工考究，琉璃构件也大都做出榫卯，使构件之间衔接牢固，与大木构造的风格相一致，这充分表明到明代时，琉璃工艺已具有相当高超的技术水平。本文通过几座明代建筑考察中发现的琉璃瓦、小兽残件的特点作初步的探讨和分析。     

镁质波形瓦机械化设备的研制

讲述了镁质波形瓦机械化设备的构造,并对生产过程中碰到的难题作了剖析,也指出了其中的不足之处。     

利用铜钼尾矿制备建筑陶瓷砖的试验研究

研究了以中条山铜矿峪的铜钼尾矿为主要原材料制备建筑陶瓷地砖及内墙砖的工艺,并确定了该工艺条件和坯体配方,并在辊道窑中生产出了合格的地砖和内墙砖。     

Mechanical and thermal characterization of as-received recycled polyethylene filled with rice husk and their relationship to the end use of these composites

ABSTRACT

Waste can be considered a crisis across the world, especially in the Global South where landfills are collapsing and vector-borne illnesses are increasing. Due to the increase in the amount of waste plastic in the environment, different uses of recycled plastics are being investigated. One such use is roofing tiles. This has been put in place in Sri Lanka through the Waste for Life organization. Here, recycled polyethylene is filled with rice husk particles. Due to the hydrophilic nature of the rice husk, the strength of the polyethylene composites decreased with increasing rice husk filler. Since the roofing tiles do not need to support a large load, the loss in strength should not be too detrimental. However, the creep behavior was improved with 10% and 20% filler. This is important in that the temperature on the roof can reach high temperatures.