-
8/8/2019 Quantities ,Units and Conversion Factors
1/6
Sharma, Rahul
-
8/8/2019 Quantities ,Units and Conversion Factors
2/6
Q uantities ,Units and Conversion
factorsLinear Measurements( eg 10m long joints)
Kilometer(km), Meter(m), Centimeter(cm) Millimeter(mm)
Microns(u) Nano(nm)1km = 1000m, 1m=100cm , 1cm= 10mm,
1mm=1000u1000U=nm
Foot(ft), Inch(in)
1feet= 12 inches1meter= 3.28 feet or 3 foot
3inches(33)1foot=.3028m Inch=24.5 mm1mile= 1.64km
-
8/8/2019 Quantities ,Units and Conversion Factors
3/6
Contd
Area Measurement(200 sqft)It is measured in square of the linear
measurementIt is length and breadth or square as per the
nameNormally square feet or square meter 1 square feet =
1(feet)length X 1(feet) breadth (1X1)1square meter= 1m(meter)
length X 1m (meter) breadth1 square meter= 10.76 square feet1Acre =
43560 sqft1Acre=0.4 hectares
1hectares=1 sqkm1sqft= 144inches
-
8/8/2019 Quantities ,Units and Conversion Factors
4/6
ContdCubic Measurement /Volume( 100cum or cft)
It is measured in cube of the linear measurementlength X Breadth
x HeightNormally cubic Feet or cubic meter 1cubic meter= 1m X 1m X
1m(cum)1 cubic Feet= 1 X 1 X 1(cft)1 cubic meter= 35.28 cubic
Feet
1cubic meter=1000liters of water 1 cubic feet= 28.34 liters of
water 1 cubic feet=1728inches
-
8/8/2019 Quantities ,Units and Conversion Factors
5/6
Stress And Pressure1 kilogram(Kg)=9.8(10)
newtons(N)Pressure=force/areaPressure= Kg/cm2 or Kg/m2M100=
100Kg/cm2 or M10= 10N/mm21 atmospheric pressure is the pressure of
76
Cm of mercury at 0 degrees C1 atm.=14.69lb/sqin=1Kg/cm2=1bar 1
Bar = 10meters of water 1Bar=14.5 psi=1kg/cm21N/mm2= 1Mpa(Mega
pascal)Normally Concrete is expressed in M10/M100 which is the
strength of concrete (compressive)M10= M stands for mix design
and 10 stands for strength
of concrete at 28days
-
8/8/2019 Quantities ,Units and Conversion Factors
6/6
ContdM10 also means nominal mix of 1:3:6 ie 1cement , 3sand, 6
coarse aggretates.Theory of Concrete : The voids(space) between the
coarse aggregates is taken
by sand and the voids in sand in filled by cement Hence we get a
mass of concreteThe strength of the concrete is Mpa or N/mm2The
slab are minimum of M20 mix (RCC) RCCFlooring are normally of M
15(PCC)The strength is very low and hence cracking in the floors
and requires substrate
preparation is required in the surfaceThe surface perparation is
one of the important areas to be considered in case
of our all productsCement comes in the bags of 50kgs or 20bags
in a ton
