1. Lecture 6 - Concrete
Objectives:-
1. To learn the different concrete categories
2. To relate the concrete as per clauses in SMM2
3. To determine the various clauses applied to the
different elements of concrete
Outcomes:-
1. Able to differentiate the different clauses used for
concrete measurement.
2. Able to write down the dimensions clearly.

2. Concrete work

3. Concrete truck and mixer

4. Pouring of concrete.

5. Vibrating and leveling of concrete

6. Types of concrete
• Type A concrete is filled
with 16mm diameter
reinforcement bars and is
known as reinforced
concrete.
• Type B concrete is
without any
reinforcement bars and is
known as mass concrete.
16mm reinforcement bar
A
B

7. Waterproof concrete
• For reinforced
concrete roof the
concrete used must be
protected with
waterproofing
additives so that
rainwater could not
penetrate.

8. Rapid hardening concrete
• For construction of
structure below water
level, rapid hardening
cement is used so that
the concrete could
harden in a shorter
time
Foundation

9. Placing of concrete
• Different types of
machines are used for
placing of concrete
depending on the
available of space and
the speed of placing.

10. Concrete beds laid to slope
• Concrete bed laid to
slope must be
separated into :-
• 1. Not exceeding 15
degree from
horizontal.
• 2. Exceeding 15
degree.
Angle > 15 degree

11. No deduction shall be made for:-
• 1.Volume occupied by
the reinforcement
bars.
• If the volume of the
concrete is 10m3 and
the volume occupied
by the bars is 1m3 the
concrete volume is
still 10m3.
Reinforcement bars

12. No deduction shall be made for:-
• If we have a concrete
column whereby we
need to place a mild
steel pipe as a service
pipe we need to find
out the area of the
pipe before we make
any deduction.
Area not exceeding
0.05m2
Concrete column
Steel pipe

13. Structure of building
Column
Floor beam
Roof beam
Ground floor slab Ground beam
1st. Floor slab

14. Unit of measurement
• Measurement to be in
m3 or volume for all
structural members.