Sieve Analysis Of Concrete

815 Words2 Pages

DESCRIPTION OF OTHER MATERIALS
1. Cement : Cement should develop appropriate strength. The Ordinary Portland Cement of 53 grades conforming to IS: 8112 is being used. PROPERTY IS CODE IS : 8112 - 1989

Specific Gravity 3.12 Consistency 33 Initial setting time 30 minimum Final setting time 600 maximum

2. Water : Water is an important ingredient of concrete as it actually participates in the chemical reaction with cement. Since it helps to from the strength giving cement gel, the quantity and quality of water are required to be looked into very carefully.
3. Aggregates : They are the important constituents of concrete. They give body to the concrete, reduce shrinkage and effect economy. Good …show more content…

Gravity of Combined Coarse Aggregates 2.882
16 Sieve Analysis of Fine Aggregates Separate Analysis Done
17 Specific Gravity of Ceramic waste material 1.17
18 Sieve Analysis of Ceramic waste material Separate Analysis Done

Procedure for Concrete Mix Design of M25 Grade Concrete
Step 1 — Determination Of Target Strength
Himsworth constant for 5% risk factor is 1.65. In this case standard deviation is taken from IS:456 against M 20 is 4.0. ftarget = fck + 1.65 x S
= 25 + 1.65 x 4.0
= 31.6 N/mm2
Where, S=Standard deviation in N/mm2=4(table-1 of IS 10262- 2009)

Step 2 — Selection of water / cement ratio:-
Table 5 of IS 456, page no 20 Selection of Water Cement Ratio
1 Maximum Water Cement Ratio (MORT&H 1700-3 A) 0.45
2 Adopted Water Cement Ratio 0.43
0.43 310 kg/m3, hence, OK.
This value is to be checked for durability requirement from IS: 456.
In the present example the minimum cement content is 310 kg/m3 which is less than 320 kg/m3. Hence cement content adopted = 320 kg/m3.
As per clause 8.2.4.2 of IS: 456
Maximum cement content = 450 kg/m3.

Step 5: Estimation of Coarse Aggregate

More about Sieve Analysis Of Concrete

Open Document