Diseases caused by Viruses: 1. Chicken pox – It is caused by Varicella-zoster virus.2. Small Pox – It is caused by Variola virus.3. Common Cold -It is caused by Rhinovirus.4. AIDS (Acquired Immunono Deficiency Syndrome) – It is caused by HumanImmunodeficiency Virus (HIV).5. Measles -It is caused by Measles virus.6....
Various types of admixtures: Super-plasticiser———————————————-sulphonated malanin formaldehyde {role of superplasticiser in a cement paste is to remove air bubbles, disperse the particles and retard setting.} Air entraining agent—————————————–neutralized vinsol resin {to increase the workability without increasing the strength and easily flowing,also added to improve frost resistance of concrete. } Accelerator—————————————————calcium...
Various field tests used to find the quality of bricks are: Uniformity in Size Uniformity in colour Hardness Soundness Strength test 1). Uniformity in size: The brick should be uniform in size and shape and should have rectangular plane surface with parallel sides and sharp straight right angled edges. The...
S.No. Stone Brick 1. They were having higher crushing strength upto 150 to 1000 kg/cm2 They were having lesser crushing strength than stones and upto 105 kg/cm2 2. Stones have less porosity. Bricks are more porous than stones. 3. Stones are heavy. Bricks are light in weight. 4. Stones are...
