Glencoe: Section 59

Question 1

Concrete for the floor slab and bearing wall footings should be made with

Answer 1

durable, well-graded aggregate.

Question 2

Concrete for the floor slab and bearing wall footings should have a compression strength of at least

Answer 2

2500 psi

Question 3

Concrete for the floor slab and bearing wall footings should be workable so that

Answer 3

it doesn’t develop large air pockets

Question 4

One method of venting radon gas is from beneath

Answer 4

a slab, through a vent up to the roof

Question 5

If necessary the proportion of X and Y should be adjusted to obtain a more workable concrete mix

Answer 5

fine and coarse aggregate

Question 6

Concerete should not drop more than X’ to the ground as its delivered by a ready-mix truck because

Answer 6

4’

because large aggregate can settle unevenly.

Question 7

After placing concrete, it should be

Answer 7

made to settle by vibrating, tamping, or spading.

Question 8

Always discuss X with concrete truck operator before placing concrete

Answer 8

hand signals so he knows when to stop

Question 9

basement concrete slabs are typically placed after

Answer 9

all improvements such as sewer and water lines have been connected

Question 10

Basement floor slabs should be no less than X and should

Answer 10

3 1/2” thick and should slope towards a floor drain.

Question 11

Screed

Answer 11

a long length of metal or wood that is used to strike off (level) the concrete.

Question 12

How do you move the screed

Answer 12

pulled by hand and at the same time back and forth in a sawing motion.

Question 13

Screed strips

Answer 13

guiding 1” pipes driven into subgrade to hold the screed level.

Question 14

After the screed strips (pipes and stakes) have been removed

Answer 14

a float is then used to pack the concrete into any gaps

Question 15

What is important in establishing a safe entry into the garage:

Answer 15

the grade, width, and radius of curves in a driveway.

Question 16

Driveways that have a grade more than X percent (X” rise in 100 lineal feet) should not be covered with gravel because

Answer 16

7% (7” rise in 100 lineal feet)

the gravel will gradually wash away.

Question 17

Driveways that have a grade more than 7 percent, X is used instead of gravel

Answer 17

concrete or asphalt

Question 18

A common type of concrete driveway is the X

Answer 18

full width slab

Question 19

Concrete on driveways should be given an X

it should also be Y

Answer 19

a broom finish to prevent both cars and people from slipping.
It should also be crowned, slightly higher at center than edges to drain water.

Question 20

A gravel base for driveways in not ordinarily required on

Answer 20

sandy, undisturbed soil.

Question 21

If the area of a driveway has recently been filled, the fill, preferable gravel should

Answer 21

settle first and be well tamped

Question 22

With the exception of sandy, undisturbed soil, a gravel base should be used

Answer 22

on all other soils

Question 23

Concrete for driveways should be X thick

and a Y is not required

Answer 23

5” thick

vapor barrier

Question 24

Sideforms for driveways are often built with X to establish Y

Answer 24

2x6 boards to establish elevation and alignment of the driveway. Also used to support he screed to strike off the concrete

Question 25

Though not required, the addition of X reduces pavement cracking

Answer 25

6x6 wire fabric reinforcing

Question 26

X should be used where driveway joins the public walk or curb and at the garage slab

Answer 26

expansion joints with asphalt saturated felt strips

Question 27

How often should expansion joints with asphalt saturated felt strips be used along long drive ways

Answer 27

every 40'

Question 28

In areas experiencing severe winter climates, driveways should

Answer 28

use air-entraining agent to produce tiny air bubbles that help the concrete resist damage during freeze and thaw cycle.

Question 29

Concrete sidewalks are constructed just like

Answer 29

concrete driveways

Question 30

Concrete sidewalks should not be poured over filled areas unless

Answer 30

the fill has settled and is well tamped. This is especially true of areas near the house after basement exvation backfill has been completed

Question 31

Minimum thickness of concrete for sidewalks over normal undisturbed soil is

Answer 31

4"

Question 32

Concrete sidewalk control joints should be spaced on

Answer 32

4' centers.

Question 33

Control joint:

Answer 33

a joint that helps to minimize random cracks in a concrete slab.

Question 34

Expansion joint:

Answer 34

gap between concrete that is filled with flexible material. The concrete is able to expand without damaging itself of adjacent surfaces

Question 35

When the slopes to the house is greater than X%, a walkway should have steps.

Answer 35

5%.

Question 36

How are individual steps in a walkway with greater than 5% slope formed

Answer 36

with 2x6 lumber

Question 37

What unit is the needed concrete material specified in

Answer 37

cubic yards

Question 38

Formula for figuring out how many cu yd of concrete

Answer 38

length in feet x width in feet x thickness in feet / 27 = cubic yards

Question 39

other formula for figuring out how many cu yd of concrete you needs

Answer 39

length in feet x width in feet / (use the chart to find the dividing number based on thickness of concrete)

Question 40

A flatwork surface, such as a floor, driveway, or sidewalk, must be

Answer 40

finished

Question 41

What does Finishing do

Answer 41

multistep process that levels the concrete and gives it a surface that will suit its intended use.

Question 42

What kind of finish does a basement have

Answer 42

smooth for floors to be attached easily.

Question 43

What kind of finish does a driveway have

Answer 43

broomed coarse