The concrete strength. Concrete becomes more brittle and v tends to decrease as the concrete strength increases.
Q: Why is reinforcing steel used in concrete? Discuss the typical properties ofreinforcing steel.
A: Reinforced concrete is used in concrete to make the structure very strong, and also to increase its…
Q: How does the fineness modulus of aggregate affect the strength of concrete
A: Brief concept introduction- Fineness modulus of aggregate- It represents the average size of the…
Q: The boards for a concrete form are to be bent into a circular shape having an inside radius of 10 m.…
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Q: Concrete is required for a column that will be Severe Exposure to freezing and thawing. The cross…
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Q: Concrete is required for walls of a building that will be Severe Exposed to freezing and thawing.…
A: Reference : ACI 311 Mix design All tables are referred from ACI 311 Mix design. Table : Relationship…
Q: A. What are the primary and secondary parameters upon which durability of concrete depends on?…
A: Durability of concrete: It is defined as the ability of concrete to resist the actions of external…
Q: o Why the tensilę strengths of concrete are of the order of 10 and 15%of the compressive'strength.
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Q: Will the immersion of the aggregates in water saturated its voids? Explain briefly
A: When the aggregate is immersed in the water, a film is formed around each particle exerting a force…
Q: techniques used to study the concrete behavior at microscopic level.
A: I would like to start answering this problem from very basics, Micro-scopic level- Behaviour of…
Q: Which one of the following sentences is not correct? a. For many years, tensile strength has been…
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Q: The flexural strength (fr) of concrete measured from the bending test is always higher than the…
A: In the above situation where there is no tension softening and compressive failure doesn't occur,…
Q: What are various elastomeric emulsion present in concrete?
A: Answer Introduction The elastomeric emulsion is used for the coating of any surface for safety…
Q: What is the weakest property of concrete? The compressive strength of the coarse aggregate The…
A: What is the weakest property of concrete?The compressive strength of the coarse aggregateThe…
Q: 24 cfs of water flows in a 4 ft diameter sewer pipe. Determine the depth of flow if the slope is…
A: Consider the given data Diameter of pipe=DD=4 ftQ=24 cfsSlope=SS=0.001 As we know that, We have a…
Q: The flexural tensile strength of M25 grade of concrete, in N/mm², as per IS:456-2000 is A 0.5 B 5 C…
A: Given- M25 concrete grade of concrete, IS 456:2000,
Q: Organic impurities into the aggregate increase the strength and durability of concrete. Select one:…
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Q: The area of the concrete in compression plus the area of reinforcement transferred on the basis of…
A: It is asked in the question that the area of concrete in compression plus area of reinforcement…
Q: 42. Permissible tensile strength of concrete, M150 is: A) 150kg/cm² C) 150N/mm? B) 15kg/cm D)…
A: The given data is: Grade of concrete = M150
Q: Concrete is required for a column that will be moderately exposed to freezing and thawing. The cross…
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Q: Steel modulus of elactisity is 29x10^6 psi what is concrete modulus of Elasticity in psi ?
A: Modulus of elasticity of the steel = 29 x 106 psi. Note: The modulus of elasticity of the steel is…
Q: 61. The repair and rehabilitation of damaged or spalled concrete is done by removing the A. O Loose…
A: The repair and rehabilitation of damaged or spalled concrete is done by removing the ____ A. Loose…
Q: c = 25 mpa, fy = 414 the tensile stress is in the concrete is?
A: Given fc = 25 MPa fy = 414 Mpa
Q: If the value of the fc' of concrete is 30 MPa, and the actual stress of the concrete subjected to a…
A: Given that the value of fc' of concrete is 30 MPa. The actual stress of the concrete subjected to a…
Q: The properties of hardened concrete also affected by curing process. Analyze any possible defect…
A: Solution: When the concrete has not been cured properly then these properties are been affected:1.…
Q: Concrete is required for a column that will be Severe exposed to freezing and thawing. The cross…
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Q: The concrete in the core of a spiral column is sub- jected to a uniform confining stress o, of 680…
A: Given: The confining stress is 680 psi. The unconfined uniaxial compressive strength is 5000 psi.
Q: The flexural strength (fr) of concrete measured from the bending test is always higher than the…
A: In the above situation where there is no tension softening and compressive failure doesn't occur,…
Q: Deformation occurs on freshly lay concrete when it finally set or harden. discuss the various…
A: Fully cured and hardened concrete must be sufficiently robust for structural and service stresses to…
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- o Why the, tensile strengths of concrete are of the order of 10 and 15%of the compressive' strength.The flexural strength (fr) of concrete measured from the bending test is always higher than the direct tensile strength (ft). In reality, the stress in the cracked part of the concrete is lower than ft. Also, failure may occur on the compressive side. Assuming NO tension softening (i.e., the stress in the cracked part stays at ft) and infinite compressive strength (i.e., compressive failure will never occur), draw the stress distribution over the depth of the beam at ultimate failure when the curvature of the section is approaching infinity. With this stress distribution, show that the upper bound of fr/ft is equal to 3. (Hint: On rotating the section, because the compressive stress can increase well beyond ft, the neutral axis will continue to shift upwards.)9. If the value of the fc' of concrete is 30 MPa, and the actual stress of the concrete subjected to a force is 12 MPa, at what stage is the concrete at?
- Why is reinforcing steel used in concrete? Discuss the typical properties ofreinforcing steel.What is the weakest property of concrete? The compressive strength of the coarse aggregate The compressive strength of the cement paste The bond between the cement paste and the aggregate The shear strength of the coarse aggregateI need the answer as soon as possible
- Concrete is required for a column that will be Severe exposed to freezing and thawing. The cross section of the column is 300 × 300 mm. The smallest spacing between reinforcing steel is 30 mm. The Required Average Compressive Strength of concrete at 28 days is 35 MPa with a slump of 80 to 100 mm. The properties of materials are as follows: ❖ Cement used is type I Portland cement with a specific gravity of 3.15. ◆ The available coarse aggregate has a maximum size of 23 mm, a dry-rodded unit weight of 1800 kg/m3, a bulk specific gravity (SSD) of 2.7, absorption capacity of 0.55%, and moisture content (SSD) of 0.25%. The fine aggregate has a bulk specific gravity (SSD) of 2.75, absorption capacity of 1.4%, a moisture content (SSD) of 2.5%, and a fineness modulus of 2.70. The aggregates conform to the ASTM C33-84 requirements for grading.The boards for a concrete form are to be bent into a circular shape having an inside radius of 10 m. What maximum thickness can be used for the boards if the normal stress is not to exceed 7 MPa? Assume that the modulus of elasticity of the wood is 12 GPa.Organic impurities into the aggregate increase the strength and durability of concrete. Select one: O True O False
- How does the fineness modulus of aggregate affect the strength of concreteThe flexural strength (fr) of concrete measured from the bending test is always higherthan the direct tensile strength (ft). In reality, the stress in the cracked part of theconcrete is lower than ft. Also, failure may occur on the compressive side. Assuming1) there is no tension softening in the cracked zone, i.e., tensile stress stays at ft; and 2)infinitely large compressive strength, draw the stress distribution over the depth of thebeam at ultimate failure when the curvature of the section is approaching infinity. Withthis stress distribution, show that the upper bound of fr/ft is equal to 3. (Hint: On rotating the section, because the compressive stress can increase well beyondft, the neutral axis will continue to shift towards to the compression side.)The properties of hardened concrete also affected by curing process. Analyze any possible defect occurred in concrete without curing