formulas

Question 1

What is the formula for density (D) kg/m^3

Answer 1

1000 x (dry weight of unit (kg)/( saturated weight of unit - suspended immersed weight of unit)

Question 2

What is the formula for net volume ( A) m^3?

Answer 2

dry weight unit/density

Question 3

average net area formula

Answer 3

net volume of unit , cu,m / height of unit, mm

Question 4

absorption % formula

Answer 4

100 x (saturated weight of unit (kg) - dry weight of unit (kg))/dry weight of unit (kg)

Question 5

absorption, kg/m^3 formula

Answer 5

1000 x (saturated weight of unit (kg) - dry weight of unit (kg) / saturated weight of unit (kg) - suspended immersed weight of unit (kg))

Question 6

Moisture content , % formula

Answer 6

100 x ( received weight of unit (kg) - dry weight of unit / saturated weight of unit (kg) - dry weight of unit (kg))

Question 7

1. All masonry work shall be laid ____ to line, level, _____ and neat in accordance with the Plans.
2. Units shall be cut accurately to fit all plumbing ducts, opening for _______ works, and all holes shall be neatly patched.
3. No construction support shall be attached to the ______ except where specifically permitted by the Engineer.

Answer 7

true, plumb

electrical

wall

Question 8

4. Masonry unit shall be sound, dry, clean and free from ________ when placed in the structure.
5. Proper masonry units shall be used to provide for all window, doors, _________, lintels, plasters etc., with a _________ of unit cutting.
6. Where masonry units cutting is necessary, all cuts shall be ______ and _________.

Answer 8

cracks

bond beams, minimum

neat, true to line

Question 9

7. Units shall be placed while the mortar is ______ and _______. Any unit disturbed to the extent that the initial bond is broken after Initial positioning shall be ______ and re-laid in fresh mortar.
8. _______, Standard Specification for Mortar for Unit Masonry requires that mortar be used within 2 ___ hours of initial mixing.

Answer 9

soft , plastic, removed , ASTM C 207, 1/2

Question 10

In non load bearing CHB the lightweight is ________ kg/m^3

Answer 10

1680

Question 11

In non load bearing CHB the medium weight is ________ kg/m^3

Answer 11

1680-1999

Question 12

normal weight of CHB for non load bearing is ________ or more.

Answer 12

2000

Question 13

Compressive strength ( average net area min., ) MPa ( Psi) of average 3 units is ______

Answer 13

4.14 ( 600)

Question 14

Compressive strength ( average net area min., ) MPa ( Psi) of average individual unit is ______

Answer 14

3.45 ( 500)