Desired slump = 50-75 mm So modifications are needed in trial mix 1 to arrive at the desired workability. To increase the workability from 25 mm to 50-75 mm an increase in water content by +3% is to be made. The corrected water content = 191.6 x 1.03 = 197.4 kg.

May 14, 2020 · 186 l of water is required to get a slump of 50mm but we need slump of 75mm as per our specifications. Clause 4.2 recommends increasing the water content by 3% to obtain an additional slope of 25 mm from the 50 mm slope

Jul 28, 2020 · From Table 2 of IS 456:2000, maximum water content =186 litres (for 25 to 50 mm slump range) for 20 mm aggregate. Estimated water content for 100 mm slump =186+ (6/100) x 186 =197 litres. (Note: If Super plasticizer is used, the …

Sep 11, 2024 · Answer: According to IS 456:2000, the maximum water-cement ratio for M30 grade of concrete is 0.45. Typically, for durable concrete, a value between 0.42 and 0.45 is chosen, depending on specific requirements.

Maximum water content for 20 mm aggregate and a slump value of 25 to 50 mm = 186.0 l. But in our problem the value of slump is 100 mm, so we need to alter the water content.

From Table 2 of IS 10262:2009, maximum water content for 20 mm aggregate = 186 litre (for 25 to 50 mm slump range) Estimated water content for 100 mm slump = 186+ (6/186) = 197 litre. (Note: If Super plasticizer is used, the water content can be reduced upto 20% and above.)

... assess the workability of concrete mix in fresh state, the slump cone test was carried out in accordance with Indian Standard code specifications IS 1199:1959. Slump values of all 17...

May 16, 2020 · Maximum water content for 20mm aggregate to get up to 50mm slump is given in Table 2 of IS10262. For aggregate = 20mm, Slump = 50mm. But for our mix design, we need water content for a 75mm slump. Clause 4.2 suggests an increase of 3% of water content for every extra 25mm slump from 50mm slump. For aggregate = 20mm, Slump = 75mm. VI.

Jan 7, 2024 · Standard deviation (s) for M30 grade concrete is typically 5 N/mm² (from Table 1 of IS 10262:2009). 3. Water Content: From Table 2 of IS 10262:2009, the maximum water content for 20 mm aggregate and a 25-50 mm slump range is 186 liters/m³. 4. Cement Content: The minimum cement content is 340 kg/m³ as per IS 456:2000.

Mar 17, 2025 · Slump value is a measure of the consistency and workability of fresh concrete. It indicates how fluid or stiff the concrete mix is, helping construction professionals ensure the right balance between ease of placement and strength.

(a) Characteristic compressive strength of concrete required at end of 28 days = M 25. (b) Nominal maximum size of aggregate used = 20 mm. (c) Shape of Coarse Aggregate = Angular. (d) Required workability at site = 50-75 mm (slump Value) (e) Quality control is …

Aug 31, 2024 · Understanding the correct M30 concrete mix ratio is essential for achieving the desired performance in construction projects, whether it’s for slabs, beams, columns, or other structural elements. The selection of materials for M30 grade concrete is crucial to achieving the desired compressive strength and durability.

There is no actual value of slump for different grades of concrete. But, we can take the approximate value as per experience by civil engineers given below. Slump value for M10 to M20 can be taken as a minimum of 20 and a maximum of 30.

(This value is for 25 to 50 mm slump range) Now, Our target of the slump is 150-175 mm (As per IS 10262-2009, clause 4.2, we can increase 3% for every additional 25 mm slump)

Mar 2, 2022 · Grade of concrete is M30. i.e. f ck = 30 MPa. Flexural Strength = 0.7 × √30 = 3.834 MPa. Modulus of Elasticity of Concrete: It can be defined as the ratio of applied stress to corresponding strain within elastic limits. It may be given as: i) …

Discover the simple steps to calculate the M30 concrete ratio for your construction projects. This easy guide provides you with the essential knowledge to mix cement, sand, and aggregates effectively, ensuring durable and robust concrete with the M30 mix ratio.

Feb 21, 2023 · M30 Concrete Mix example: Let’s say we have to design a Reinforced Concrete Cement (RCC) with a slump of 100 using Cement (Specific Gravity 3.14), 20mm Sub Angular Coarse aggregate (Specific Gravity 2.45) and Zone 2 Sand (Specific Gravity 2.50) for a Moderate exposure condition. Plus We will be using a water reducing admixture.

M30 mix ratio – 1 : 2.5 : 3.5 The trail mix is required to define the workability ( slump ), density, compaction, and, most of all, the compressive strength of different concrete grades for various purposes.

Dec 9, 2024 · The slump value and compaction factor of the mix are also provided. The slump test indicates that the mix is highly cohesive and workable, with a true slump value of about 60 mm. Despite flowing during vibration, the mix does not exhibit any segregation or bleeding.

Aug 2, 2017 · Mix is cohesive, workable and had a true slump of about 25 mm and it is free from segregation and bleeding. So modifications are needed in trial mix 1 to arrive at the desired workability. To increase the workability from 25 mm to 50-75 mm an increase in water content by +3% is to be made. The corrected water content = 191.6 x 1.03 = 197.4 kg.