BASIC KNOWLEDGE OF CIVIL ENGINEERING

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BASIC KNOWLEDGE OF CIVIL ENGINEERING

• Cement's Initial Setting time should be 30 min(Minimum) and 90 min (maximum)
• Final Setting time of cement should be=10 Hours

Types of test performed for a road's improved sub grade sand filling: 

• Fines modules (FM) of Fine aggregates
• California bearing ratio (CBR)
• Dynamic Cone Penetration test
• MDD of fine aggregate
• Field Dry Density

Types of test Performed for earth filling in Embankment with specified soil:

• Plasticity index

Types of test Performed for Concrete Work:

• Setting time of cement
• Compressive strength of cement
• Gradation of coarse Aggregates
• FM of Fine Aggreagtes
• Water Absorption of Coarse aggregates
• Loss angles abrasion test
• Concrete cylinder casting & testing

Types of test performed for M.S High strength deform bar:

• Tensile Strength ,Elongation and unit weight

Types of test performed for Brick Works:

• Setting time of cement
• Compressive strength of cement
• FM of fine aggregates
• Compressive strength of brick
• Water absorption of brick
• Efflorescence of brick

⇒Local Sand FM Limit should be 0.5 to 0.8

⇒Toak Sand FM Limit sould be 1.2 to 1.8

⇒Coarse sand or shylhet sand FM Should be 2.5

⇒At Improved Sub grade 0.5 to 0.8 FM Sand should be used.

1. MS Flat Bar Weight determine equation=0.00785A
2. Brick require for 1 square meter one brick flat soling=32 nos
3. Brick require for 1 square meter one layer herring bone soling-52 nos.
4. Cement require for 9.3 square meter neat cement finishing=1/2 bag or 25 Kg
5. A head mason can work 25-30 cum brick work in a day.

# Lintel thickness Should be 15cm

#Parapet wall height should be 1 meter

# Window height should be 120cm

#D.P.C thickness should be 2.5 cm

# Plinth Height Should be 45cm

#Measurement of riser should be 15cm

#Building height should be 315cm

# Plaster Thickness at ceiling should be 6mm

$ 1 Cum Cement =30 Bags

$ 1 Cum Khoa    = 300 No's of Bricks

$ 1 Bag of cement =0.0347 cum cement  (50/1440=0.0347 cum)

$ Volume of per Bag cement=1.25 Cubic feet

$ Weight of Per Bag cement =50 Kg or 112 pb

$ Water absorption of brick ,If the brick take rest for 24 hours in under neath the water is 1/5 or 1/6 of the brick Weight

$ Measurement of brick=9.5 inches * 4.5 inches * 2.75 Inches(without mortar) and 10 inches*5 inches *3 inches (with mortar)

• Weight of First class brick=3.85 Kg
• Crushing strength of first class brick in per square not less than 1000 Pound
• Tensile strength of first class brick in per square not less than 3000 Pound

#Brick Work the joint thickness b/w two bricks should be=12 mm

#Lapping Measurement at compression Zone Should be=24 D (Without hook)

#Lapping Measurement at Tensile Zone Should be=40 D (Excluding hook)

# One hook length should be=9D

# For Crank Extra length measurement should be=0.50d

# Stirrup length measurement equation=2(A+B)+30 cm

# Weight of step of a staircase =11.5 r (r=rise in cm)

# MS Plate weight determine equation=7.85 t

# The Brick should be take rest underneath the water at 2 hours before using.