0
What should be the compressive strength of mortar cubes in 3 days and 7 days?
Wiki User
∙ 11y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Why the size of concrete cubes are 150mm?
Basically, the force supplied by a concrete compression machine is a definite value. For normal concrete strength application, say below 50MPa, the stress produced by a 150mmx150mmx150mm cube is sufficient for the machine to crush the concrete sample. However, if the designed concrete strength is 100MPa, under the same force (about 2,000kN) supplied by the machine, the stress under a 150mmx150mmx150mm cube is not sufficient to crush the concrete cube. Therefore, 100mmx100mmx100mm concrete cubes are used instead to increase the applied stress to crush the concrete cubes. For normal concrete strength, the cube size of 150mmx150mmx150mm is already sufficient for the crushing strength of the machine.
HOW MANY CUBes if you have 3 rows of 3 cubes?
3 cubes x 3 rows = 9 cubes
How many cubes will have two sides black?
Coal cubes: 0. Sugar cubes: 0 Painted cubes: maybe some of them.
The rectangular prism is 4 cube by 2 cubes How many cubes make up the prism?
A rectangular prism that is 4 cubes by 2 cubes is made up of 8 cubes.
How many cubes are needed to build a skeleton cube having side of three cubes?
20 cubes
How many cubes required for testing of compressive strength?
4
How can you calculate the characteristic strength of concrete?
The characteristic strength of the concrete is the compressive strength of the(fck) concrete cubes of size 150 mm tested at 28 days. And compressive strength of cubes should not fall not more than 5% of this fck.
How do you calculate the compressive strength of concrete cubes?
Concrete specimens are tested using the ASTM39 Test Standard Test Methodfor Compressive Strengthof Cylindrical Concrete Specimens by using two samples made from the same test at the same age, usually at strength of 28 days old.Design engineers use the specified strength ƒ´c to design structural elements. This specified strength is incorporated in the job contract documents. The concrete mixture is designed to produce an average strength (ƒ´cr) higher than the specified strength, such that the risk of not complying with the strength specification is minimized.Cylindrical specimensfor acceptance testing should be 6 x 12 inch (150 x 300 mm) size or 4 x 8 inch (100 x 200 mm) when specified. The Concrete strength is calculated by dividing the maximum load at failure by the average cross sectional area.Concrete compressive strength requirements can vary from 2500 psi (17 MPa) for residential concrete to 4000 psi (28 MPa) and higher in commercial structures. Higher strengths up to and exceeding 10,000 psi (70 MPa) are specified for certain applications.Cylinders are placed in a Compression testing machine and loaded to failure from 20 to 50psi. The type of break should be recorded by a Certified Technician.Example 1:For a concrete sample that is broken after 28 daysThe cylinder is 6” diameter, so it has an area of 3.14 x Diameter squared /4A = 3.14 x 6 x 6/4A = 28.26 square inchesIf the force required to break the cylinder was 97,500 poundsThen the compressive strength is 97,500 pounds / 28.26 square inches = 3,450 psi.3,450psi needs to be compared to the Design strength determined by the Design Strength determined by the Design Engineer.Example 2:Given: f 'c = 3000 psiConcrete test cylinders averaged 2800 psi.PSICore 1 =2900Core 2 =2850Core 3 =2450Average compressive strength of 3 cores = 2730 psi.Find: Is the concrete in the structure adequate under CDOT specifications?Solution:Test Evaluation:f 'c = 3000 psiAverage compressive strength of 3 cores - 2730 psiDo any compressive strengths differ from the average by more than 10%?10% of Average compressive strength = 273 psiCore 1: 2900 - 2730 = 170 psi, < 273 therefore OKCore 2: 2850 - 2730 = 120 psi, < 273 therefore OKCore 3: 2730 - 2450 = 280 psi, > 273 therefore -discard core and re-compute average compressive strength using two remaining cores.New average compressive strength = 2875 psi
Where can you get 1 inch cubes in darwin?
i say that you really shouldn't by cubes but you should try ACE-More
Do they sell sugar cubes at Kmart?
They should sell sugar cubes at Kmart. If you are not sure then ask the store manager there.
What is c35 grade concrete in psi?
It is the bearing capacity in N/mm2 when tested on 21 day on a hydraulic testing m/c When we tested this grade concrete cubes on 28th day the compressive strength value have to come 35 N/mm2.
Should you use chicken stock cubes or chicken consomme cubes or extra flavor in your chicken soup?
Either type of cubes would add extra flavor to your soup.
Why the size of concrete cubes are 150mm?
Basically, the force supplied by a concrete compression machine is a definite value. For normal concrete strength application, say below 50MPa, the stress produced by a 150mmx150mmx150mm cube is sufficient for the machine to crush the concrete sample. However, if the designed concrete strength is 100MPa, under the same force (about 2,000kN) supplied by the machine, the stress under a 150mmx150mmx150mm cube is not sufficient to crush the concrete cube. Therefore, 100mmx100mmx100mm concrete cubes are used instead to increase the applied stress to crush the concrete cubes. For normal concrete strength, the cube size of 150mmx150mmx150mm is already sufficient for the crushing strength of the machine.
How do you reduce eating ice-cubes?
Dont put them in your mouth that should help
What is the meaning of eating ice cubes?
you are sexually frustrated and should seak help
How many cubes would you need to build a stack that was 3 cubes long 2 cubes high and 4 cubes deep?
The answer probably is 3*2*4 = 24 unit cubes but you could also do it with 10 cubes: 2 cubes of size 2*2*2 and 8 unit cubes. The question does not require the cubes to be unit cubes.
Pinky wants to make chilled lime juice as fast as possible what should she add first- sugar or ice cubes why?
how can we make chilld lime juice as fast as possible by adding sugar or by adding ice cubes
