Design of Masonry Structures

Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar. Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar_____________?

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Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar. Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar_____________?

Select your answer based on the codes given below Codes?
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not a correct explanation of A.
C. A is true but R is false.
D. A is false but R is true

The mortars used for masonry construction are classified based on strength in IS 2250 and IS 1905 according to their designations L1,L2, H1, H2, M, M2.

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The mortars used for masonry construction are classified based on strength in IS 2250 and IS 1905 according to their designations L1,L2, H1, H2, M, M2.

The correct sequence of increasing order of their strengths is?
A. LLLZ.HLHI.MLMJ
B. L2,L,,M2>Mi,H2)H,
C. M,,M2, H,,H2,Li,L2
D. L2,L,,M,,M2,H,,H2

In the case of panel wall subjected to horizontal loads at right angles to the plane of the wall, with the mortar not leaner than Ml type, tensile stress in bending in the vertical direction may be allowed to the extent of _______________?

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In the case of panel wall subjected to horizontal loads at right angles to the plane of the wall, with the mortar not leaner than Ml type, tensile stress in bending in the vertical direction may be allowed to the extent of _______________?

A. 0.4 kg/cm2
B. 0.7 kg/cm2
C. 1.0 kg/cm2
D. 1.2 kg/cm2

Assertion A : Limiting value of slenderness ratio for a column is less than that of a wall. Reason R : A column can buckle around either of the two horizontal axes while a wall can buckle around only one axis.

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Assertion A : Limiting value of slenderness ratio for a column is less than that of a wall. Reason R : A column can buckle around either of the two horizontal axes while a wall can buckle around only one axis.

Select your answer according to the codes given below.
A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.

The use of relatively weak mortar_______________?

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The use of relatively weak mortar_______________?

Consider the following statements.
1. will accommodate movements due to loads and, cracking if any, and will be distributed as thin hair cracks which are less noticeable or harmful.
2. will result in reduction of stresses due to differential expansion of masonry units.
select the correct statements.
A. 1 alone is correct
B. 2 alone is correct
C. both 1 and 2 are correct
D. neither 1 nor 2 is correct