Brick,Sand & Cement

Engineering Materials

Engineering Materials

 What are the chemical constituents of Standard Brick clay?

Ans: Chemical constituents of Brick clay:

·       Silica(SiO₂)                55%

·       Alumina(Al₂O₃)         30%

·       Iron Oxide(Fe₂O₃)     8%

·       Magnesia(Mg)            5%

·       Lime(CaO)                 1%

·       Organic                       1%

    What are the contaminant of brick clay?

Ans: Contaminants are…..

·       Presence of pebbles

·       Lime

·       Organic matter

·       Presence of Salt

3   Characteristics of first class bricks?

• ·     Good in shape
• ·       Standard size
• ·       Water absorption  of its dry weight after 24 hours dropped in water.
• ·       Well burnt
• ·       No scratch for nail
• ·       Not more than 2.5% salt of its own weight.
•  

4.       What are the matters are liable for best bricks?

·       Clay components

·       Procedure of making clay

·       Procedure of dryness

·       Procedure of burn and control of temperature.

·       Use of power to burn.

      What are the lab test cement?

·       Setting time test

(a)    Initial setting time

(b)    Final setting time

·       Strength test

(a)    Compressive strength

(b)    Tensile strength

·       Fineness of cement

·       Soundness of cement

·       Chemical composition

6      What are the characteristics of cement?

·       Hydration

·       Fineness

·       Soundness

·       Strength

·       Settingness

       Classification of cement?

·       Color cement

·       Aluminous cement

·       High early strength Portland cement

·       Clay cement

·       Sulphet resisting cement

·       Pozzalanic cement