30 Questions
What is the compressive strength of M25 grade concrete in psi?
3625psi
Which of the following grades of concrete is used in the construction of foundation?
M5 and M7.5
What is the primary purpose of using M5 grade concrete in construction?
To prevent direct contact of foundation concrete from the soil
Which of the following is NOT a use of M10 and M15 grades of concrete?
Construction of columns
What is the compressive strength of M40 grade concrete in Mpa?
40Mpa
What is the mix ratio of M20 grade concrete?
1:1.5:3
What primarily affects the modulus of elasticity of concrete?
The relative proportions of the aggregates and the cement matrix
At what stress levels does the modulus of elasticity of concrete start decreasing?
At high stress levels when matrix cracking develops
What is a limitation of even the highest-grade concrete?
It is never completely waterproof
What is the primary purpose of watertight concrete?
To protect the structure from water ingress or to retain water within
What is one of the most valuable properties of concrete?
Its strength
What is the most important parameter that gives a picture of the overall quality of concrete?
Its strength
What is the primary function of weigh batchers in concrete production?
To measure the weight of concrete ingredients
What type of weigh batchers can measure the moisture content of aggregates?
Electronic weigh batchers
What is the primary concern when transporting concrete to its place of use?
Hydration of cement starts
What is the primary advantage of using crane buckets and ropeways for transporting concrete?
Transporting concrete above the ground level
What is the main objective of transporting concrete from the mixing plant to the construction site?
To maintain the intended water-cement ratio, slump, and air content
What is the primary advantage of using belt conveyers for transporting concrete?
Continuous transportation of concrete
What is unique about the curing method using infra-red radiations?
It does not result in strength loss due to rapid temperature rise
What is the primary reason for using pneumatic wheels in wheelbarrows for transporting concrete?
To prevent segregation of concrete due to vibration
What is the primary advantage of using electronic weigh batchers over mechanical weigh batchers?
They can measure the moisture content of aggregates
What is the main difficulty in rapid steam curing of concrete?
Loss of strength due to rapid temperature rise
What is the ratio of cement to fine aggregate to coarse aggregate in a 1:1:2 concrete mix using weigh batching?
50:50:100
Why is it essential to clean and wet the mortar pan before starting concrete transportation?
To prevent the pan from sticking to the concrete
What is the purpose of using steam in concrete curing?
To achieve uniform heating and rapid strength gain
What is the term used to describe the process of transferring concrete from the mixing plant to the construction site?
Transporting
What is the benefit of using high-pressure steam curing?
It overcomes the loss of strength due to rapid temperature rise
Why is truck mixing preferred for transporting concrete over long distances?
It allows for transportation to far-off locations
What is the purpose of the pre-steaming period in low-pressure steam curing?
To prepare the concrete for steam curing
What percentage of the 28-day power can be achieved in 16 to 24 hours using low-pressure steam curing?
70%
Test your knowledge of different concrete grades, their mix ratios, and compressive strengths. From M5 to M50, this quiz covers various concrete grades and their properties.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
