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How many cement bags and sand is required for M20 grade of concrete?
Vivek Patel
for 1 cubic meter, we calculate as follow let's take dry mixture of aggregate sand and cement required is 1.52 cubic meter. M20 have an approximate proportion of cement sand and aggregate is 1:1.5:3 cement in bag= (1/5.5.)x1.52/0.035 =7.89 say=8 bags sand in kg = (1.5/5.5)x1.52 x 1650 =684 kg aggregRead more
for 1 cubic meter, we calculate as follow
let’s take dry mixture of aggregate sand and cement required is 1.52 cubic meter.
M20 have an approximate proportion of cement sand and aggregate is 1:1.5:3
cement in bag= (1/5.5.)x1.52/0.035 =7.89 say=8 bags
sand in kg = (1.5/5.5)x1.52 x 1650 =684 kg
aggregate in kg =(3/5.5) x 1.52 x 1700 =1410 kg
See lessWhat is the method used for the proportioning of Aggregate (10mm &20mm) in Concrete?
dbnalawade
Following points part of the answer to the question : IS 456 and IS 1343 are the code of practice you can use. The method of proportions aggregates for concrete is part design mix process. Size and Grading impacts the design mix greatly. larger the size of aggregate smaller is the cement requiremenRead more
Following points part of the answer to the question :
There is ACI method available for the same exercise ACI 211.1is the code you can use.
Hope this helps.
See lessHow many slump tests must be carried out for 20m3 of concrete?
dbnalawade
Frequency of Slump testing is carried based on project specifications, however I would recommend following depending on where you are ! In your case one test should be good or one test for every transit mixer you receive. Transit mixer comes in 8m3 capacity. At site receiving end of concrete : OnRead more
Frequency of Slump testing is carried based on project specifications, however I would recommend following depending on where you are !
In your case one test should be good or one test for every transit mixer you receive. Transit mixer comes in 8m3 capacity.
At site receiving end of concrete :
At batching plant :
Slump test is carried at every 1000m3 concrete produced per grade.
See lessCan Epoxy Coated Rebars be Used Instead of SS 316L in Expansion Joints in Concrete?
dbnalawade
Yes - as long as your construction specification permits you to use the substitution. You have to convince the design engineer and obtain his consent and explain why and how epoxy coated bar is equal or better that SS316L without compromising the overall performance and life.
Yes – as long as your construction specification permits you to use the substitution. You have to convince the design engineer and obtain his consent and explain why and how epoxy coated bar is equal or better that SS316L without compromising the overall performance and life.
See lessWhat are the Types of Mineral Admixtures in Cement?
CB Sowmya
There are two types of admixtures: Mineral admixtures Chemical admixtures Mineral admixtures are mostly solids. Chemical admixtures are mostly liquids. The most common mineral admixtures are: Fly ash Ground Granulated Blast furnace Slag (GGBS) Rice husk ask Metakaolin Silica fume Sugarcane bagasse oRead more
There are two types of admixtures:
Mineral admixtures are mostly solids. Chemical admixtures are mostly liquids.
The most common mineral admixtures are:
The mineral admixtures are added majorly to modify the strength of the concrete and increase the compressive strength.. Since all these mineral admixtures are byproducts of some industrial process which otherwise would be dumped into landfills, it is also beneficial to the environment.
See lessWhat is the significance of Fineness of Cement?
AdityaBhandakkar
Fineness of Cement: It is the property of cement that gives an idea about the size of particle in cement and thus surface area ratio. Significance: 1) Increase in fineness, increase in heat of hydration. This is due to an increase in surface area of cement requires more water content. 2) Bleeding reRead more
Fineness of Cement:
It is the property of cement that gives an idea about the size of particle in cement and thus surface area ratio.
Significance:
1) Increase in fineness, increase in heat of hydration. This is due to an increase in surface area of cement requires more water content.
2) Bleeding reduces by increasing the fineness of the cement. This is due to an increase in surface area, adsorb water content.
3)By the increase in fineness, surface increases. Thus, it requires more water, and if calculation not done properly, dry shrinking possible to occur in concrete structures.
4)If particles are of small size. It’s surface area increase. This adhesion between them is increased.
Fineness test are performed to determine fineness of cement.
Reply, If you need clarity on any specific point.
See lessWhat is Cement Gel in Concrete?
Himanshu joshi
When water is added to cement, the chemical reaction starts, which is known as the hydration process, and it is exothermic. About 23% of water is required for a chemical reaction to take place, and 15% of water is required for gel formation. This formed cement gel is made up of calcium silicate andRead more
When water is added to cement, the chemical reaction starts, which is known as the hydration process, and it is exothermic.
See lessAbout 23% of water is required for a chemical reaction to take place, and 15% of water is required for gel formation. This formed cement gel is made up of calcium silicate and hydrate (c-s-H), which is important in strength property of cement paste.
So ultimately, the strength of cement gel is an important part of gaining strength and durability.
What is Soundness Property of Cement?
Preet Chovatiya
Ability of cement to retain its volume after getting hardened is known as the soundness of cement. We can also say that the test conducted to identify the excess amount of lime in cement is known as the soundness of cement. Two methods are there for measuring soundness of cement. Le-chatelier methodRead more
Ability of cement to retain its volume after getting hardened is known as the soundness of cement.
We can also say that the test conducted to identify the excess amount of lime in cement is known as the soundness of cement.
Two methods are there for measuring soundness of cement.
- Le-chatelier method
- Autoclave method
See less