How is WC ratio calculated?

The water to cement ratio is calculated by dividing the water in one cubic yard of the mix ( in pounds) by the cement in the mix (in pounds). So if one cubic yard of the mix has 235 pounds of water and 470 pounds of cement- the mix is a . 50 water to cement ratio.

Why is WC ratio important?

The Importance of Water The water to cement ratio largely determines the strength and durability of the concrete when it is cured properly. A w/c ratio of 0.4 means that for every 100 lbs of cement used in the concrete, 40 lbs of water is added.

What is the ideal WC ratio when hand mixing?

0.45
What is the ideal water-cement ratio to be used while hand mixing? Explanation: Ideal water cement ratio for general works is 0.45. During machine mixing, it can be in the range of 0.4-0.5. Hand mixing is done by labourers and maximum 0.6 can be allowed.

How many Litres of water is one bag of cement?

Normal range for amount of water used to mix each 50 kg bag of cement is between 20 liters and 30 liters (94 lb. bag of cement is between 4.5 gal.

Which is the best method for curing flat surfaces?

Which is the best method for curing flat surfaces? Explanation: Curing is the process of maintaining moisture in freshly laid concrete to strengthen it. For flat surfaces like floors and slabs, ponding or stagnating water is the best method. Temporary bund can be made with mortar and filled with water to cure.

Which is the weakest concrete Mcq?

The correct answer for Which is the weakest concrete mix is 1:5:10.

How much water is needed for a 20kg bag of cement?

around 2 litres
As a guide, use around 2 litres of water per 20kg bag. Do not over water unless you need to achieve a sloppy mix. The less water the stronger the concrete.

What is W/C ratio of cement and water?

Water-Cement Ratio is defined as the ratio between the weight of the water to the weight of cement. In general terms w/c ratio means, how much water is required for the particular mix.

What does a high or low W/C ratio mean?

A high w/c ratio means greater the amount of water required in a concrete mix that consequences the weakening of concrete strength. And low w/c ratio ( Generally, 0.38 w/c ratio) means the amount of water is sufficient to complete the hydration of concrete.

What is the limitation chart for W-C ratio?

Limitation chart for w-c ratio shows the maximum value of the w-c ratio as per IS 456: 2000 which can be adopted during mix design. The lower value of the above three values should be adopted as W/C ratio for mix design.

What is the W/C ratio of a cylindrical sample?

For the w/c ratio ranged from 0.35 to 0.45, the strength variation curves of both cylindrical and cubic samples are shown in Fig. 3.43 and Table 3.11.