Mohammad Nurunnabi

A  refractory  material is one that retains its strength at high  temperatures .  ASTM  C71 defines refractories as "non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)". Refractory materials are used in linings for  furnaces ,  kilns ,  incinerators  and  reactors . They are also used to make  crucibles  and moulds for casting glass and metals and for surfacing flame deflector systems for rocket launch structures. Refractory materials Refractory materials must be chemically and physically stable at high temperatures. Depending on the operating environment, they need to be resistant to  thermal shock , be chemically inert , and/or have specific ranges of  thermal conductivity  and of the coefficient of  thermal expansion . The ...

It is essential to know the type of bricks Bricks for properly understanding the masonry work. Brick can be many types depending on its quality, making process, its raw material and purpose of their using. In this post I'll describe the brick types for various criteria. Depending on quality, bricks are three type - First class brick Second class brick, and Third class brick. First class brick : These bricks are made from good quality raw materials. Color of first class brick is uniform. These are regular in size and shape and doesn't absorb more than 20% water of its own dry weight when immersed in fresh water for 24 hours. The crushing strength of this type of brick should be 105 kg/cm2. Read More: 6 of Good Quality Brick 3 Most Important Properties of Brick Second class brick : The quality of bricks of this type is little bit less from first class brick. Such as it can be slightly over burned. She size and shape can be slightly differ from standard. The crushing str...

"It does't matter how slowly you go as long as you do not STOP" -----Confucius Hi there ! I am Md. Nurunnabi from Bangladesh . This blog is  intended for sharing my academic and research interests and also my practical experiance.  I have tried to compose and configure all the information regarding my research works and professional attachments. I hope this blog will work as a platform for sharing knowledge and developing affiliation. I would request you to browse through all the pages. I will be honored to receive your feedback. Thanking you in anticipation.