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design mix

design mix
19問 • 4ヶ月前
  • Sabrina Mikhaela Canindo
    • 通報

    問題一覧

  • 1

    have different effects on the setting times of different cements.

    Alkali Carbonate and Bicarbonate, Carbonates and Bicarbonates of Sodium and Potassium

  • 2

    can cause very rapid setting.

    Alkali Carbonate and Bicarbonate, Sodium Carbonate

  • 3

    can either accelerate or retard the set.

    Alkali Carbonate and Bicarbonate, Bicarbonates

  • 4

    In large concentrations, these salts can materially reduce concrete strength.

    Alkali Carbonate and Bicarbonate

  • 5

    When the sum of the dissolved salts exceeds 1000 ppm, tests for their effect on setting time and 28-day strength should be made.

    Alkali Carbonate and Bicarbonate

  • 6

    chiefly due to the possible adverse effect of chloride ions on the corrosion of reinforcing steel or prestressing strands.

    Chloride

  • 7

    attack the protective oxide film formed on the steel by the highly alkaline (pH greater than 12.5) chemical envionment present in concrete.

    Chloride Ions

  • 8

    Of the total chlo-ride-ion content in concrete, only about __ is water soluble.

    50% to 85%

  • 9

    can be introduced into concrete with the separate mixture ingredients admixtures, aggregates, cementitious materials, and mixing water or through exposure to deicing salts, seawater, or salt-laden air in coastal environments.

    Chloride

  • 10

    should be avoided in steel reinforced concrete.

    Calcium Chloride Admixtures

  • 11

    is due to possible expansive reactions and deterioration by sulfate attack, especially in areas where the concrete will be exposed to high sulfate soils or water.

    High Sulfate Content in Mix Water

  • 12

    are not very soluble in water and are seldom found in sufficient concentration to affect the strength of concrete.

    Carbonates of Calcium and Magnesium

  • 13

    are present in some municipal waters.

    Bicarbonates of Calcium and Magnesium

  • 14

    Concentrations up to 400 ppm of bicarbonate in these forms are not considered harmful.

    Bicarbonates of Calcium and Magnesium

  • 15

    can be present in high concentrations without harmful effects on strength.

    Magnesium Sulfate and Magnesium Chloride

  • 16

    Good strengths have been obtained using water with concentrations up to 40,000 ppm of __.

    Magnesium Chloride

  • 17

    Concentrations of __ should be less than 25,000 ppm.

    Magnesium Sulfate

  • 18

    Natural ground waters seldom contain more than 20 to 30 ppm of iron, however, acid mine waters may carry rather large quantities.

    Iron Salts

  • 19

    in concentrations up to 40,000 ppm do not usually affect concrete strengths adversely.

    Iron Salts

    • Enumeration

    Enumeration

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    Enumeration

    Enumeration

    42問 • 1年前
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    Identification

    Identification

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    Identification

    Identification

    260問 • 1年前
    Sabrina Mikhaela Canindo

    Chapter 1

    Chapter 1

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    Chapter 1

    Chapter 1

    125問 • 1年前
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    C1 part 2

    C1 part 2

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    C1 part 2

    C1 part 2

    36問 • 1年前
    Sabrina Mikhaela Canindo

    Chap 1&2

    Chap 1&2

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    Chap 1&2

    Chap 1&2

    73問 • 1年前
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    Chap 3&4

    Chap 3&4

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    Chap 3&4

    Chap 3&4

    84問 • 1年前
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    HUM

    HUM

    Sabrina Mikhaela Canindo · 204問 · 1年前

    HUM

    HUM

    204問 • 1年前
    Sabrina Mikhaela Canindo

    Lesson 2,3,4,5,6,7

    Lesson 2,3,4,5,6,7

    Sabrina Mikhaela Canindo · 140問 · 1年前

    Lesson 2,3,4,5,6,7

    Lesson 2,3,4,5,6,7

    140問 • 1年前
    Sabrina Mikhaela Canindo

    Chap 1,2

    Chap 1,2

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    Chap 1,2

    Chap 1,2

    97問 • 1年前
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    Lesson 1

    Lesson 1

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    Lesson 1

    Lesson 1

    64問 • 1年前
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    Chap 3,4

    Chap 3,4

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    Chap 3,4

    Chap 3,4

    85問 • 1年前
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    Chapter 2

    Chapter 2

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    Chapter 2

    Chapter 2

    57問 • 1年前
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    Lesson 1&2

    Lesson 1&2

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    Lesson 1&2

    Lesson 1&2

    84問 • 1年前
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    Chapter 3

    Chapter 3

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    Chapter 3

    Chapter 3

    38問 • 1年前
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    Lesson 3&4

    Lesson 3&4

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    Lesson 3&4

    Lesson 3&4

    54問 • 1年前
    Sabrina Mikhaela Canindo

    Chapter 4

    Chapter 4

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    Chapter 4

    Chapter 4

    51問 • 1年前
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    Lesson 5,6&7

    Lesson 5,6&7

    Sabrina Mikhaela Canindo · 73問 · 1年前

    Lesson 5,6&7

    Lesson 5,6&7

    73問 • 1年前
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    (2)

    (2)

    Sabrina Mikhaela Canindo · 56問 · 1年前

    (2)

    (2)

    56問 • 1年前
    Sabrina Mikhaela Canindo

    Chapter 5

    Chapter 5

    Sabrina Mikhaela Canindo · 84問 · 1年前

    Chapter 5

    Chapter 5

    84問 • 1年前
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    CE215

    CE215

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    CE215

    CE215

    60問 • 1年前
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    MTE4

    MTE4

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    MTE4

    MTE4

    17問 • 1年前
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    ES

    ES

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    ES

    ES

    238問 • 1年前
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    HUM

    HUM

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    HUM

    HUM

    204問 • 1年前
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    DRAW

    DRAW

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    DRAW

    DRAW

    71問 • 1年前
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    ECON

    ECON

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    ECON

    ECON

    51問 • 1年前
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    Chap1

    Chap1

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    Chap1

    Chap1

    121問 • 1年前
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    MECH

    MECH

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    MECH

    MECH

    39問 • 1年前
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    chap2

    chap2

    Sabrina Mikhaela Canindo · 131問 · 1年前

    chap2

    chap2

    131問 • 1年前
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    draw

    draw

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    draw

    draw

    48問 • 1年前
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    Enumeration

    Enumeration

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    Enumeration

    Enumeration

    31問 • 1年前
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    ttr

    ttr

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    ttr

    ttr

    92問 • 1年前
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    g ycu

    g ycu

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    g ycu

    g ycu

    9問 • 1年前
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    ENUMERATION

    ENUMERATION

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    ENUMERATION

    ENUMERATION

    20問 • 1年前
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    Enumeration

    Enumeration

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    Enumeration

    Enumeration

    35問 • 1年前
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    Enumeration

    Enumeration

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    Enumeration

    Enumeration

    53問 • 1年前
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    5-8

    5-8

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    5-8

    5-8

    348問 • 1年前
    Sabrina Mikhaela Canindo

    Chapter 5

    Chapter 5

    Sabrina Mikhaela Canindo · 84問 · 1年前

    Chapter 5

    Chapter 5

    84問 • 1年前
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    Chap 6

    Chap 6

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    Chap 6

    Chap 6

    71問 • 1年前
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    Enumeration

    Enumeration

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    Enumeration

    Enumeration

    43問 • 1年前
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    Enu2

    Enu2

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    Enu2

    Enu2

    23問 • 1年前
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    Chap 7

    Chap 7

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    Chap 7

    Chap 7

    80問 • 1年前
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    Enumeration

    Enumeration

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    Enumeration

    Enumeration

    39問 • 1年前
    Sabrina Mikhaela Canindo

    Chap 8

    Chap 8

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    Chap 8

    Chap 8

    113問 • 1年前
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    L3

    L3

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    L3

    L3

    167問 • 1年前
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    chap9

    chap9

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    chap9

    chap9

    42問 • 1年前
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    L4

    L4

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    L4

    L4

    123問 • 1年前
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    Natural and Forest Resources

    Natural and Forest Resources

    Sabrina Mikhaela Canindo · 61問 · 1年前

    Natural and Forest Resources

    Natural and Forest Resources

    61問 • 1年前
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    ECON

    ECON

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    ECON

    ECON

    31問 • 1年前
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    Water and Mineral Resources

    Water and Mineral Resources

    Sabrina Mikhaela Canindo · 71問 · 1年前

    Water and Mineral Resources

    Water and Mineral Resources

    71問 • 1年前
    Sabrina Mikhaela Canindo

    MTE4 PREFI

    MTE4 PREFI

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    MTE4 PREFI

    MTE4 PREFI

    9問 • 1年前
    Sabrina Mikhaela Canindo

    Food, Energy, Land Resources

    Food, Energy, Land Resources

    Sabrina Mikhaela Canindo · 56問 · 1年前

    Food, Energy, Land Resources

    Food, Energy, Land Resources

    56問 • 1年前
    Sabrina Mikhaela Canindo

    HUM PREFI

    HUM PREFI

    Sabrina Mikhaela Canindo · 142問 · 1年前

    HUM PREFI

    HUM PREFI

    142問 • 1年前
    Sabrina Mikhaela Canindo

    CE215 PREFI

    CE215 PREFI

    Sabrina Mikhaela Canindo · 19問 · 1年前

    CE215 PREFI

    CE215 PREFI

    19問 • 1年前
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    Enumeration

    Enumeration

    Sabrina Mikhaela Canindo · 22問 · 1年前

    Enumeration

    Enumeration

    22問 • 1年前
    Sabrina Mikhaela Canindo

    8,9

    8,9

    Sabrina Mikhaela Canindo · 70問 · 1年前

    8,9

    8,9

    70問 • 1年前
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    10,11

    10,11

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    10,11

    10,11

    72問 • 1年前
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    L8

    L8

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    L8

    L8

    38問 • 1年前
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    L9

    L9

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    L9

    L9

    32問 • 1年前
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    L10

    L10

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    L10

    L10

    35問 • 1年前
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    L11

    L11

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    L11

    L11

    37問 • 1年前
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    Identification

    Identification

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    Identification

    Identification

    5問 • 1年前
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    Ident

    Ident

    Sabrina Mikhaela Canindo · 71問 · 1年前

    Ident

    Ident

    71問 • 1年前
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    enu

    enu

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    enu

    enu

    12問 • 1年前
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    officials

    officials

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    officials

    officials

    17問 • 1年前
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    events

    events

    Sabrina Mikhaela Canindo · 11問 · 1年前

    events

    events

    11問 • 1年前
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    Q1

    Q1

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    Q1

    Q1

    54問 • 1年前
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    1

    1

    Sabrina Mikhaela Canindo · 55問 · 1年前

    1

    1

    55問 • 1年前
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    Enumeration

    Enumeration

    Sabrina Mikhaela Canindo · 39問 · 1年前

    Enumeration

    Enumeration

    39問 • 1年前
    Sabrina Mikhaela Canindo

    1-5

    1-5

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    1-5

    1-5

    146問 • 1年前
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    2,3,4

    2,3,4

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    2,3,4

    2,3,4

    81問 • 1年前
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    1

    1

    Sabrina Mikhaela Canindo · 58問 · 1年前

    1

    1

    58問 • 1年前
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    2

    2

    Sabrina Mikhaela Canindo · 28問 · 1年前

    2

    2

    28問 • 1年前
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    3

    3

    Sabrina Mikhaela Canindo · 31問 · 1年前

    3

    3

    31問 • 1年前
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    4

    4

    Sabrina Mikhaela Canindo · 22問 · 1年前

    4

    4

    22問 • 1年前
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    enu 2

    enu 2

    Sabrina Mikhaela Canindo · 14問 · 1年前

    enu 2

    enu 2

    14問 • 1年前
    Sabrina Mikhaela Canindo

    5

    5

    Sabrina Mikhaela Canindo · 11問 · 1年前

    5

    5

    11問 • 1年前
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    ENU

    ENU

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    ENU

    ENU

    21問 • 1年前
    Sabrina Mikhaela Canindo

    1

    1

    Sabrina Mikhaela Canindo · 88問 · 1年前

    1

    1

    88問 • 1年前
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    2

    2

    Sabrina Mikhaela Canindo · 66問 · 1年前

    2

    2

    66問 • 1年前
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    midterm

    midterm

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    midterm

    midterm

    38問 • 1年前
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    2.1

    2.1

    Sabrina Mikhaela Canindo · 24問 · 1年前

    2.1

    2.1

    24問 • 1年前
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    L1

    L1

    Sabrina Mikhaela Canindo · 48問 · 1年前

    L1

    L1

    48問 • 1年前
    Sabrina Mikhaela Canindo

    Mech E3

    Mech E3

    Sabrina Mikhaela Canindo · 38問 · 1年前

    Mech E3

    Mech E3

    38問 • 1年前
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    Techno

    Techno

    Sabrina Mikhaela Canindo · 146問 · 1年前

    Techno

    Techno

    146問 • 1年前
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    enu L1

    enu L1

    Sabrina Mikhaela Canindo · 27問 · 1年前

    enu L1

    enu L1

    27問 • 1年前
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    Mech E2

    Mech E2

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    Mech E2

    Mech E2

    14問 • 1年前
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    1-5

    1-5

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    1-5

    1-5

    186問 • 1年前
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    L1

    L1

    Sabrina Mikhaela Canindo · 52問 · 1年前

    L1

    L1

    52問 • 1年前
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    Book

    Book

    Sabrina Mikhaela Canindo · 72問 · 1年前

    Book

    Book

    72問 • 1年前
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    L2

    L2

    Sabrina Mikhaela Canindo · 28問 · 1年前

    L2

    L2

    28問 • 1年前
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    L3

    L3

    Sabrina Mikhaela Canindo · 80問 · 1年前

    L3

    L3

    80問 • 1年前
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    Hum 3

    Hum 3

    Sabrina Mikhaela Canindo · 186問 · 1年前

    Hum 3

    Hum 3

    186問 • 1年前
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    L4

    L4

    Sabrina Mikhaela Canindo · 26問 · 1年前

    L4

    L4

    26問 • 1年前
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    Obtaining Data

    Obtaining Data

    Sabrina Mikhaela Canindo · 16問 · 1年前

    Obtaining Data

    Obtaining Data

    16問 • 1年前
    Sabrina Mikhaela Canindo

    問題一覧

  • 1

    have different effects on the setting times of different cements.

    Alkali Carbonate and Bicarbonate, Carbonates and Bicarbonates of Sodium and Potassium

  • 2

    can cause very rapid setting.

    Alkali Carbonate and Bicarbonate, Sodium Carbonate

  • 3

    can either accelerate or retard the set.

    Alkali Carbonate and Bicarbonate, Bicarbonates

  • 4

    In large concentrations, these salts can materially reduce concrete strength.

    Alkali Carbonate and Bicarbonate

  • 5

    When the sum of the dissolved salts exceeds 1000 ppm, tests for their effect on setting time and 28-day strength should be made.

    Alkali Carbonate and Bicarbonate

  • 6

    chiefly due to the possible adverse effect of chloride ions on the corrosion of reinforcing steel or prestressing strands.

    Chloride

  • 7

    attack the protective oxide film formed on the steel by the highly alkaline (pH greater than 12.5) chemical envionment present in concrete.

    Chloride Ions

  • 8

    Of the total chlo-ride-ion content in concrete, only about __ is water soluble.

    50% to 85%

  • 9

    can be introduced into concrete with the separate mixture ingredients admixtures, aggregates, cementitious materials, and mixing water or through exposure to deicing salts, seawater, or salt-laden air in coastal environments.

    Chloride

  • 10

    should be avoided in steel reinforced concrete.

    Calcium Chloride Admixtures

  • 11

    is due to possible expansive reactions and deterioration by sulfate attack, especially in areas where the concrete will be exposed to high sulfate soils or water.

    High Sulfate Content in Mix Water

  • 12

    are not very soluble in water and are seldom found in sufficient concentration to affect the strength of concrete.

    Carbonates of Calcium and Magnesium

  • 13

    are present in some municipal waters.

    Bicarbonates of Calcium and Magnesium

  • 14

    Concentrations up to 400 ppm of bicarbonate in these forms are not considered harmful.

    Bicarbonates of Calcium and Magnesium

  • 15

    can be present in high concentrations without harmful effects on strength.

    Magnesium Sulfate and Magnesium Chloride

  • 16

    Good strengths have been obtained using water with concentrations up to 40,000 ppm of __.

    Magnesium Chloride

  • 17

    Concentrations of __ should be less than 25,000 ppm.

    Magnesium Sulfate

  • 18

    Natural ground waters seldom contain more than 20 to 30 ppm of iron, however, acid mine waters may carry rather large quantities.

    Iron Salts

  • 19

    in concentrations up to 40,000 ppm do not usually affect concrete strengths adversely.

    Iron Salts