0
What is the cement content in the different grades of concrete?
Wiki User
∙ 15y ago
It depends on the strength you need. The content is measured in sacks (94lbs per sack) per cubic yard. example: 5.5 sack mix = 5.5 sacks per cu.yd. shich is about a 2500-3000 lb mix.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What is nominal mix design?
Nominal mixes are those proportioned by the volume of the main ingredients and usually written in order of the ingredients thus Cement:Sand: Coarse aggregate (stone, chippings). So a 1:3:6 is a nominal mix containing 1 volume of cement, 3 volumes of sand and 6 volumes of coarse aggregate. Gauge boxes are generally used to batch the ingredients. The problem with these types of mixes is that the quality of the concrete is entirely dependant on the quality of the materials. In other words, if you use the same gauge boxes to weigh ingredients from different sources, you will most likely have different concrete qualities. Designed mixes on the other hand are specified as a grade the producer of the concrete has to achieve usually in terms of compressive strength but may include other criteria (size of the stone, minimum amount of cement, flexural strength, air content etc). So a grade 30 concrete will be the same whether batched in Kansas City, Karachi, Kingston-Upon-Hull or Kinshasa
How much coarse aggregate is in one cubic meter of concrete?
It depends on the required grade of concrete, you need to know the particular grade. The three grades specify the ratios of Cement : Stone : Sand. M15 = M150 = 1 : 2 : 4 M20 = M200 = 1 : 1.5 : 3 M25 = M250 = 1 : 1 : 2 As you can see there is always two parts sand to one part stone. Higher grades have more cement. So the ratio of stone to the whole is 2:7, 3:11, and 1:4. The percentages are 28.6%, 27.3%, and 25.0%.
A procedure for mixing 25MPa concrete with a small 180l concrete mixer without additives?
Proportions for different grades: Cement : Sand : Gravel 1 : 2 : 5 for grade C15(general purpose concrete) 15 mpa 1 : 2 : 4 for grade C25(strong) 25 mpa 1 : 2 : 3 for grade C30(very strong) 30 mpa Remember the proportion is done in terms of volume. This means the above proportions are correct if using the same measure.
What grade of concrete use in column and slab?
as per ACI , the ratio between column & beam concrete grades dont exceed 1.4
What is the density of M-25 grade concrete?
The Civil Engineering Data Standards manual states the density of many grades of concrete. Standard density for fresh M-25 concrete is: 2414 Kg/ M3.
Different grades of cement and their applications?
in a simple way it is the strength of concrete, which it can bear the loads of its specified grade ex C 25 grade can resist the weight of 25kn/m2 after 28days of 60% after 7 days.
Which are the commonly used grades of concrete?
The commonly used grades of concrete are as follows,M10M15M20M25M30M35M40
Cement consumption per cum of all grades of concrete?
m15- 6.25 m20 - 6.8 m25 - 7.5 m30- 8.5 m35- 9 m40 - 10
What is the ratio of cement sand and aggregate in M30 mix of concrete?
The ratios of cement to sand to aggregate for the different grades of concrete are as follows. M10 has a ratio of 1:3:6. M15 has a ratio of 1:2:4. M20 has a ratio of 1:1.5:3. M25 has a ratio of 1:1:2, but M30 has no set ratio. It is a designed mixture to achieve the stress tolerance desired.
Stainless steel grades?
The stainless steel grades includes carbon steel, manganese steel, nickel steel, nickel-chromium steel, and molybdenum steel. The content of carbon in the different steel grades varies.
What is nominal mix design?
Nominal mixes are those proportioned by the volume of the main ingredients and usually written in order of the ingredients thus Cement:Sand: Coarse aggregate (stone, chippings). So a 1:3:6 is a nominal mix containing 1 volume of cement, 3 volumes of sand and 6 volumes of coarse aggregate. Gauge boxes are generally used to batch the ingredients. The problem with these types of mixes is that the quality of the concrete is entirely dependant on the quality of the materials. In other words, if you use the same gauge boxes to weigh ingredients from different sources, you will most likely have different concrete qualities. Designed mixes on the other hand are specified as a grade the producer of the concrete has to achieve usually in terms of compressive strength but may include other criteria (size of the stone, minimum amount of cement, flexural strength, air content etc). So a grade 30 concrete will be the same whether batched in Kansas City, Karachi, Kingston-Upon-Hull or Kinshasa
How concrete designated by grades?
There are 3 main ways concrete is put in to grades the first way is strength the 2ed ways is materials of makeup and last is what is used for
How much coarse aggregate is in one cubic meter of concrete?
It depends on the required grade of concrete, you need to know the particular grade. The three grades specify the ratios of Cement : Stone : Sand. M15 = M150 = 1 : 2 : 4 M20 = M200 = 1 : 1.5 : 3 M25 = M250 = 1 : 1 : 2 As you can see there is always two parts sand to one part stone. Higher grades have more cement. So the ratio of stone to the whole is 2:7, 3:11, and 1:4. The percentages are 28.6%, 27.3%, and 25.0%.
What is the ratio of concrete grades of M15?
1:2:4
What is the concrete mixing ratio in m60 concrete?
cemet: sand: Agg=1:1:2 (Nominal Mix) Above answer is not as per engineering standards. For concrete mixing ration in M30 grade concrete, the mix has to be designed after testing all the materials including water in labs. When you go for higher grade of concretes the mix has to be designed , it is the water to cement ratio which has to be monitered for higher grades of concrete
A procedure for mixing 25MPa concrete with a small 180l concrete mixer without additives?
Proportions for different grades: Cement : Sand : Gravel 1 : 2 : 5 for grade C15(general purpose concrete) 15 mpa 1 : 2 : 4 for grade C25(strong) 25 mpa 1 : 2 : 3 for grade C30(very strong) 30 mpa Remember the proportion is done in terms of volume. This means the above proportions are correct if using the same measure.
How do you make refractory concrete?
Ingredients: River gravel or crushed fire bricksSandCalcium Aluminate cement. (if available in different grades choose the better one)Lime (lime is usually cheaper, about 80% of the cement price)WaterYou can add into this mix a little standard Fireclay if you like. Mixture: (parts ratio is 3 x 2 x 2 x 0.5, plus water)3 shovels of the gravel or crushed firebricks2 shovels of sand2 shovels of the (portland) cementhalf shovel of limeThis amount will require approximately 6-7 liters of water to mix the concrete. Put dry gravel and sand on a thin metal or plastic sheet, or on a clean concrete surface in an area you can make a bit dirty. (Be sure to clean the area and tools with water after working with cement.)Add the cement and lime on top of the gravel and sand.Calcium Aluminate cement and Lime will work the best as the cement in hot cooking conditions- This applies to refractory concrete as well as to heat resistant mortars.(Lime is sometimes mixed into fire clays. This is mixed like a normal cement based mortar, but with half the cement replaced with the lime. The cement holds it together when it is drying but when the heat gets into the cement and burns it out, the lime holds it all together. Lime used in building - calcium hydroxide Ca(OH)2 [oxide of calcium CaO of limestone] is used for making mortar and cement.)Ingredients in the now days Portland cement are:60% to 67% CaO17% to 25% SiO23% to 8% Al2O3up to 6% Fe2O3plus can contain also mini amount of MgO, MgSO4, Na2O, and K2O
