# What is the best ratio for roof concrete?

## What is the best ratio for roof concrete?

Generally 1:2:4 and 1:1.5: 3 ratios of RCC are used in construction work. Where cement concrete 1:2:4 is used; it means 1 part of cement 2 parts of fine aggregate/coarse sand and 4 parts of coarse aggregate. This ratio of cement concrete gives high strength of cement concrete and is recommended for following works.

## What is the concrete ratio for residential building?

Generally, concrete mix ratio 1: 1.5: 3 or 1: 1: 2 (Cement, Sand and aggregate) used for rcc column construction, but, in house, typically, most common, safest best concrete mix ratio used for RCC column is 1: 1: 2 (Cement, Sand and aggregate), in which one part is cement, 1 part is sand and 2 part is aggregate.

## What is the mixture ratio of concrete?

Different types of concrete grades and their uses

Concrete Grade Mix Ratio (cement : sand : aggregates) Compressive Strength
M15 1 : 2 : 4 2175 psi
M20 1 : 1.5 : 3 2900 psi
M25 1 : 1 : 2 3625 psi

## What is the meaning of 1 2 4 in concrete?

The proportion is used for showing the amount of cement, sand, and coarse aggregate in the concrete. The specification should also say if those proportions are by weight or volume. In mix design the proportion 1: 2:4 means, 1 part of cement is mixed with 2 part of sand and 4 part of coarse aggregate.

## How much cement is required for slab?

How many cement bags required for 1000 sq ft slab? their ans will be following: 76 bags (3813 kgs), 95 bags (4761 kgs) & 114 bags ( 5708 kgs) cement are required for 1000 sq ft slab 4 inch, 5inch & 6 inch thick respectively in m20 grade of concrete.

## What is water cement ratio in concrete?

The water-cement ratio is the weight of the mixing water divided by the weight of the cement. High-quality concrete is produced by lowering the water-cement ratio as much as possible without sacrificing the workability of fresh concrete, allowing it to be properly placed, consolidated, and cured.

## How is roof slab reinforcement calculated?

The quantity is done in two steps.

1. (Calculation of Bars No’s) First, calculate the number of bars required (main and distribution both). FORMULA = (Total length – Clear cover)/center to center spacing + 1. Main bar = (5000 – (25+25))/100 + 1.
2. (Cutting length) MAIN BAR: FORMULA = (L) + (2 x Ld) + (1 x 0.42D) – (2 x 1d)

## What is M30 concrete ratio?

VIII MIX CALCULATIONS OF M30 GRADE CONCRETE

A Volume of Concrete = 1 cu.m
= 0.677*0.63*2.74 *1000
= 1168.6 kg
F Fine Aggregate (F.A) = F * F.A ratio * S.G * 1000
= 0.677*0.37*2.74 *1000

## What is M30 concrete mix?

M30 Grade of Concrete Mix Design Calculation Formula Volume of concrete = 1 Cu. Cement Content = 360 / 3.15 x 1000 = 0.114 Cu. M. Water Content = 140 / 1.00 x 1000 = 0.140 Cu.

## How is concrete ratio calculated?

The prescribed Nominal Concrete Mix Ratio of M20 grade concrete is 1:1.5:3.

1. Cement = 1 Part.
2. Sand = 1.5 Part.
3. Aggregate = 3 Part.
4. Total dry volume of ingredients required = 1.57 cu.m.

## How much cement do I need for a 1000 sq ft roof?

Cement bags About 0.38 cement bag is used per sq ft of construction. So, around 400 bags of cement (50kg each) are consumed for 1000 sq ft home.

## What is the cost of 1 bag cement?

Questions & Answers on UltraTech Cement

Packaging Type Min Price Max Price
HDPE Bags Rs 340/Bag Rs 405/Bag
Sack Bag Rs 330/Bag Rs 390/Bag

## What concrete mix ratio should you use for slabs?

To do this, add slightly more aggregate so that you have a 1:2:4 ratio. With the right amount of water and additives added in, this should result in a reliable mix that is appropriate for slab creation. What Concrete Mix Ratio Should You Use for Footings?

## What is the recommended amount of aggregate for a concrete roof?

Assumption is that you are referring to the roof slab on a concrete building. In such a case the recommendation is M30, that’s 1 portion of cement, 0.75 portion of sand, and 1.5 portion of aggregate.

## What are concrete roof tiles made of?

Concrete roof tile is made of sand, cement, and water. In making concrete strong, these ingredients should usually be mixed in a ratio of 1:2:3:0.5 to achieve maximum strength. That is 1 part cement, 2 parts sand, 3 parts gravel, and 0.5 part water.

## What is the best concrete mix ratio for RCC column construction?

Generally, concrete mix ratio 1: 1.5: 3 or 1: 1: 2 (Cement, Sand and aggregate) used for rcc column construction, but, in house, typically, most common, safest best concrete mix ratio used for RCC column is 1: 1: 2 (Cement, Sand and aggregate), in which one part is cement, 1 part is sand and 2 part is aggregate.