This document provides the recommended mix proportions for concrete with a specified compressive strength of 30 MPa. The mix achieved a compressive strength of 38.25 MPa with a water-cement ratio of 0.42. The mix proportions were 1 part cement, 1.322 parts fine aggregate, 2.342 parts coarse aggregate, and 0.523 parts water by weight. The fresh concrete had a slump of 111 mm and compaction factor of 0.915.

1. CIVIL ENGINEERING DEPARTMENT
RECOMMENDED MIX PROPORTIONS FOR CONCRETE M30
[ AS PER IS 10262-2009 ]
Sr.No. DESCRIPTION MIX (TRIAL) NO:1
1. Strength at days(
𝑵
𝒎𝒎 𝟐
)
A
Specifiedworkscube
strength
30
𝑵
𝒎𝒎 𝟐
B
Laboratory Design Strength 38.25
𝑵
𝒎𝒎 𝟐
2. WORKABILITY
A Slump(mm) 111 mm
B CompactionFactor(%) 0.915
3. Degree of control Good
4. Methodof Compaction Table Machine Vibrator
5. MaximumNominal size of
aggregate(mm) taken For calculation
20mm
6. Water cementratio by Weight
A Free 0.45
B Actual 0.42
7. Mixproportions
Cement : F.A : C.A : Water
Cement F.A. C.A. Water
1.000 1.322 2.342 0.523
6 7.932 14.052 3.138

2. 8. Aggregate cement ratio by Weight 3.664 : 1.000
9.
Cementcontent(
𝑲𝒈
𝒎𝒎 𝟑
) MIN MAX
A Theoretical 320 480
B Actual 456 _
10. Laboratory Cube Strength obtained(
𝑵
𝒎𝒎 𝟐
)
After curing
A 3 Days
(Normal curingmethod)
B 7 Days
(Normal curingmethod)
C 28 Days
(Normal curingMethod)
11. UnitWeightof FreshConcrete (
𝑲𝒈
𝒎 𝟑
) 6097.27
𝑲𝒈
𝒎 𝟑