Construction Materials · Construction Material and Management · GATE CE
Marks 1
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 minimum moist curing period becomes higher when a mineral admixture is added to concrete.
Identify the CORRECT option from choices given below.
If the weights retained on the $2.36 \mathrm{~mm}, 1.18 \mathrm{~mm}, 600 \mu \mathrm{~m}$, and $300 \mu \mathrm{~m}$ sieves are $30 \%$, $35 \%, 15 \%$, and $20 \%$, respectively, of the total weight of an aggregate sample, then the fineness modulus of the sample is ___________ (rounded off to 2 decimal places).
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 be
Which one of the following statements related to bitumen is FALSE?
Match all the possible combinations between Column X (Cement compounds) and Column Y (Cement properties) :
| Column X | Column Y |
|---|---|
| (i) $${C_3}S$$ | (P) Early age strength |
| (ii) $${C_2}S$$ | (Q) Later age strength |
| (iii) $${C_3}A$$ | (R) Flash setting |
| (S) Highest heat of hydration | |
| (T) Lowest heat of hydration |
Which one of the following combinations is correct?
Which of the following equations is correct for the Pozzolanic reaction?
Marks 2
During determination of the bulk specific gravity of compacted bituminous specimen, the mass in air of the specimen is 1260 g and volume is $525 \mathrm{~cm}^3$. The density of water is $1.0 \mathrm{~g} / \mathrm{cm}^3$. The theoretical maximum specific gravity of mix is 2.510 .
The percentage air voids in the compacted specimen is __________ (rounded off to 2 decimal places).
In the context of pavement material characterization, the CORRECT statement(s) is/are
P. Walls of one brick thick are measured in square meters.
Q. Walls of one brick thick are measured in cubic meters.
R. No deduction in the brickwork quantity is made for openings in walls up to 0.1 $$m^2$$ area.
S. For the measurement of excavation from the borrow pit in a fairly uniform ground, dead men are left at suitable intervals.
For the above statements, the correct option is