Concrete

Which one of the following is utilized to determine the long-term deformation of concrete under sustained loading?

Consider the following statements (P) and (Q): (P): Fly ash and ground granulated blast furnace slag can be used as mineral admixtures in concrete. (Q): As per IS 456:2000, the min...

Identify the FALSE statement from the following options:

In the context of construction materials, which of the following statements is/are CORRECT?

Consider the following statements $(P)$ and $(Q)$ : $(P):$ Fly ash and ground granulated blast furnace slag can be used as mineral admixtures in concrete. (Q): As per IS 456:2000,...

Concrete of characteristic strength 30 MPa is required. If 40 specimens of concrete cubes are to be tested, the minimum number of specimens having at least 30 MPa strength should b...

Consider a balanced doubly-reinforced concrete section. If the material and other sectional properties remain unchanged, for which of the following cases will the section becomes u...

Concrete of characteristic strength 30 MPa is required. If 40 specimens of concrete cubes are to be tested, the minimum number of specimens having at least 30 MPa strength should b...

Creep of concrete under compression is defined as the _________.

M20 concrete as per IS 456: 2000 refers to concrete with a design mix having _______________

Creep of concrete under compression is defined as the _________.

In the context of provisions relating to durability of concrete, consider the following assertions: Assertion (1): As per IS 456-2000, air entrainment to the extent of 3% to 6% is...

When a specimen of M25 concrete is loaded to a stress level of 12.5 MPa, a strain of 500×10-6 is recorded. If this load is allowed to stand for a long time, the strain increases to...

The deformation in concrete due to sustained loading is

Let the characteristic strength be defined as that value, below which not more than 50% of the results are expected to fall. Assuming a standard deviation of 4 MPa, the target mean...

The frequency distribution of the compressive strength of 20 concrete cube specimens is given in the table. If μ is the mean strength of the specimens and σ is the standard deviati...

Group I gives a list of test methods and test apparatus for evaluating some of the properties of Ordinary Portland Cement (OPC) and concrete. Group II gives the list of these prope...

For $$M25$$ concrete with creep coefficient of $$1.5,$$ the long-term static modulus of elasticity (expressed in $$MPa$$) as per provisions of $$IS:$$ $$456-2000$$ is _____________...

The flexural tensile strength of M25 grade of concrete, in N/mm 2 , as per IS:456-2000 is __________.

The modulus of elasticity, E = 5000$$\sqrt{{\mathrm f}_\mathrm{ck}}$$ where f ck is the characteristic compressive strength of concrete, specified in IS:456-2000 is based on

Maximum possible value of compaction factor for fresh (green) concrete is

For limit state of collapse, the partial safety factors recommended by IS 456:2000 for estimating the design strength of concrete and reinforcing steel are respectively

The partial factor of safety for concrete as per IS: 456-2000 is

The flexural strength of M30 concrete as per IS: 456-2000 is

The working stress method of design specifies the value of modular ratio, $$m = 280/\left( {3{\sigma _{cbc}}} \right),$$ where $${{\sigma _{cbc}}}$$ is the allowable stress in bend...

The modulus of elasticity of concrete mix M25 is