CHAPTER 3

Question 1

It is popularly known as CHB. CHB’s are manufactured in variety of sizes, shapes, textures, and strengths for various needs and convenience in masonry construction

Answer 1

Concrete Hallow Blocks

Question 2

Concrete Hollow Block is classified into two

Answer 2

Load bearing
Non-load bearing

Question 3

Provides structural support.

Thickness ranges from 15 to 20 centimeters.

Minimum compressive strength is 13.1 MPa or 1900 psi

Answer 3

Load Bearing CHB

Question 4

Intended for walls, partitions, fences, and dividers.

Thickness ranges from 7 to 10 centimeters.

Minimum compressive strength is 4.14 MPa or 600 psi.

Answer 4

Non-Load Bearing CHB

Question 5

Load bearing blocks shall conform to ____________, Standard Specification for Load-bearing Concrete Masonry Units.

Answer 5

ASTM C90

Question 6

Non-load bearing blocks shall conform to ________,Standard Specification for Non-Load bearing Concrete Masonry Units.

Answer 6

ASTM C129

Question 7

Advantages of CHB

Answer 7

Durable and Strong
Non-combustible
Fire resistant
Affordable
Readily Available
Weather Resistant

Question 8

Disadvantages of CHB

Answer 8

Complex Installation
Time-consuming
Labor intensive

Question 9

The main components of CHB laying are:

Answer 9

1. CHB
2. Mortar
3. Rebar

Question 10

the building block in CHB laying.

Answer 10

CHB

Question 11

mixture of cement, sand, and water. It is used as the bonding material.

Answer 11

Mortar

Question 12

mainly provides tensile strength and holds wall together.

Answer 12

Rebar or Steel Reinforcing bars

Question 13

CHB PATTERNS AND ARRANGEMENTS

Answer 13

1. Running bond
2. American Bond or Common Bond
3. Flemish Bond
4. English Bond
5. Stack Bond

Question 14

Most common CHB bonding pattern.

Creates a pattern of continuous horizontal lines that runs the length of the wall.

Answer 14

Running Bond

Question 15

Variation of running bond with a course of full-length headers at regular intervals

Answer 15

American or Common Bond

Question 16

This bond alternates headers and stretchers.

Answer 16

Flemish Bond

Question 17

Like the Flemish Bond, it also has alternating courses of headers and stretchers.

Answer 17

English Bond

Question 18

Opposite of the Running Bond.

Composed of all stretchers directly stacked above each other.

Cannot be used as a structural bond.

Answer 18

Stack Bond