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Time-Saver Standards for Landscape Architecture > Concrete > Flashcards

Flashcards in Concrete Deck (45)
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1

Concrete

Aggregate, Cement, Water, and Admixture

2

Portland Cement

Lime, Silica, Alumina, Gypsum

3

How long does Cement take to reach full strength?

28 Days

4

Isolation (expansion) Joint

Provide for lateral movement between slabs. Extend the full depth of the Concrete

5

Concrete Qualities

Strength, Durability, Stability, Availability, Adaptability, and Low-cost

6

Properties of Concrete

Constituents, Skills used in placing

7

Concrete resistance to freeze/thaw and deicing chemicals

Apply admixtures

8

Concrete resistance to abrasion and wear

Increased if the concrete mix contains well-graded strong aggregate

9

Methods of Concrete Placement

Cast in Place, Sprayed, Mixed in Place

10

Process of Hydration

Cement and Water mixture results in hardening

11

Types of Aggregate for Concrete

Sand, Gravel, Crushed Stone

12

Selection of Aggregate for Concrete

Resistance to abrasion, Performance, Resistance to effects of freezing/chemicals, Range of Aggregates

13

Admixtures

Workability, Reduce Moisture, Increase durability, Resistance to Freezing, Accelerate or retard hardening or setting, Increase Flowability

14

Water Quality for Concrete

Potable Water (Uncontaminated)

15

2 Styles of Mixing Concrete

Ready-mix and On-site Mixing

16

Slump Test

Determines Relative Consistency & Reflects changes in the amount of water in the mix

17

Air Content Test

Determines the air entertainment at the time of use

18

Cylinder Test

Determines the compressive strength of cured concrete

19

Site Preparation for Use of Concrete

Granular sub-base over-prepared, and compacted, subgrade

20

Benefits of Reinforcement

Controls cracking and give greater tensile strength

21

Purpose of Joints

Minimize damaging effects of expansion and contraction in concrete due to temperature variations and the presence of moisture

22

Control, or contraction, joints

Designed to restrict the cracking of concrete at predetermined locations. ¼ to ⅓ the thickness of the concrete. At intervals roughly the width of slab

23

Construction Joint

Provide places where the casting of concrete can be stopped

24

Joint Fillers

Joints tend to be filled and sealed to keep out moisture and debris

25

Types of Joint Fillers

Fiber Filler
Wood Dividers
Plastics, rubber, cork, or metal

26

Joint Sealant

Prevents filler material from bleeding or being squeezed up. Keep out debris. Keep out water

27

Two of the most common types of concrete finishes

Floating and Troweling

28

Colored Concrete One Course Method

Mixing pigments when concrete is created

29

Colored Concrete Two-Course Method

Top or finish surface after laying regular concrete

30

Dry-shake Method

Sprinkling Special pigments on the surface

31

Stains and Paints

Typically done on existing concrete

32

Exposed Aggregate

Resistance to slipping and heavy wear

33

One-course Aggregate Finish

Fine aggregate added to the concrete mix. Hosing or acid washing and brushing
Surface retardant applied

34

Two-course Aggregate Finish

Base concrete laid. Concrete topping with aggregate added over base concrete Hosing or acid washing and brushing

35

Seeding Aggregate Finish

Sprinkling aggregate over a freshly placed concrete base

36

Special Non-slip finishes

Floats, trowels, brooms, or dry-shaking grains onto the surface. Grains such as Silicon carbide and aluminum oxide

37

Edging

Prevents chipping
Helps compact and harden

38

Wet Covering

Covering with moisture-retaining fabric
Keeps concrete wet

39

Waterproof paper or plastic sheets

Prevents rapid loss of moisture from the concrete

40

Sprinkling or ponding of water

Effective but expensive
Sand or earth berms to be removed later

41

Curing compounds

Used in conjunction with coverings. Used to help sustain curing

42

Temperature Control

Cover with sheets. Use Heaters

43

Sealers and Glaziers

Prevent or Reduce Moisture Penetration and Chloride Penetration

44

Sealers and Glaziers

Used to waterproof or bring out the natural color

45

Restoration and Repair of Concrete

(1)Removal/Cleaning of Damaged Concrete
(2)Concrete or grout is mixed in small amounts
(3)Treat damaged areas