發問時間: 科學工程學 · 7 年前

工程材料學 期中考題目 急!!

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a 15in long member deforms to a length of 26in .when subject to an axial force what is the strain.

Define poisson's ratio.

draw typical strain diagram for aluminum and rock.

explain the difference between apparent and bulk specific gravity.

what is gap-graded aggregate?

how is fineness modulus measured,and does it represent?

a sieve analysis using sieves No.100, No.50,No.30,No.16,No.8,No.4 the fineness modulus is found to be equal to 3. What is the average size of the sample?

indicate half-sieve

what is the maximum size of fine aggregate?

the specific gravity and bulk density of an aggregate are 2.6 and 95 pcf respectively. find the loose volume of a 190-lb sample.

what are the four conditions of moisture in aggregate?

name three common mineral

name three common types of rocks used as aggregates

a sample of fine aggregate with a specific gravity of 2.6 has bulk density of 105 pcf. find the void content

a sample of gravel weighs 420g .its oven-dry weight is 400g . what is the moisture content.

一個15英寸長的構件變形,長度為26英寸。什麼是應變的軸向力。

定義泊松比例。

畫鋁和岩石的典型應變圖。

解釋表觀堆積比重之間的差異。

間斷級配骨料是什麼?

如何測量的細度模數,它代表?

篩分析篩100號, 50號, 30號, 16號, 8號, 4號的細度模數等於3 。樣本的平均規模是什麼?

表示半篩

細骨料的最大尺寸是什麼?

合共比重和容重分別為2.6和95 PCF 。找到的鬆散體積190磅樣本。

合的四個條件中的水分是什麼?

三種常見的礦物命名

三種常見的岩石作為聚集命名

細集料的比重為2.6的樣品的堆積密度為105 PCF 。找到空隙內容

樣本的礫石,重420克。烘乾重量為400G 。是什麼的水分含量。

1 個解答

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  • 7 年前
    最佳解答

    a 15in long member deforms to a length of 26in .when subject to an axial force what is the strain.

    $$$$$$$ strain = (26-15)/15 = 11/15 = 73.33%

    Define poisson's ratio.

    $$$$$$$ please search online

    draw typical strain diagram for aluminum and rock.

    $$$$$

    http://aluminium.matter.org.uk/content/media/image...

    http://www.webpages.uidaho.edu/~simkat/course_mate...

    explain the difference between apparent and bulk specific gravity.

    $$$$$$

    apparent = without voids

    bulk = with voids

    what is gap-graded aggregate?

    $$$$$$ aggregates of certain size range is missing

    how is fineness modulus measured,and does it represent?

    $$$$$$

    fineness modulusis measured by Summing up the values of Cumulative

    %Retained of the sieves No.100, No.50,No.30,No.16,No.8,No.4 and then be devided by 100 and expressed in decimal to 0.01

    A larger fineness modulus means the aggregate is finer, smaller means coarser.

    a sieve analysis using sieves No.100, No.50,No.30,No.16,No.8,No.4 the fineness modulus is found to be equal to 3. What is the average size of the sample?

    $$$$$$$$$ the average size = No.30 sieve size

    indicate half-sieve

    $$$$$$$$

    standard sieve with half height, Ex. for a 8" sieve

    Full Height

    Overall height = 2-5/8"

    Depth to cloth = 2" (50 mm)

    Half Height

    Overall height = 1-5/8"

    Depth to cloth = 1" (25 mm)

    what is the maximum size of fine aggregate?

    $$$$$ 3/8"

    the specific gravity and bulk density of an aggregate are 2.6 and 95 pcf respectively. find the loose volume of a 190-lb sample.

    $$$$$$ the loose volume of a 190-lb sample = 190/95 = 2 cubic foot

    2013-10-26 14:57:14 補充:

    a sample of fine aggregate with a specific gravity of 2.6 has bulk density of 105 pcf. find the void content

    $$$$$ void = [ 2.6 - (105/62.4)] / 2.6 = 35.28%

    2013-10-26 18:38:55 補充:

    a sieve analysis using sieves No.100, No.50,No.30,No.16,No.8,No.4 the fineness modulus is found to be equal to 1. What is the average size of the sample?

    $$$$$$$$$ the average size = No.100 sieve size

    2013-10-26 18:39:13 補充:

    a sieve analysis using sieves No.100, No.50,No.30,No.16,No.8,No.4 the fineness modulus is found to be equal to 2. What is the average size of the sample?

    $$$$$$$$$ the average size = No.50 sieve size

    2013-10-26 18:39:45 補充:

    a sieve analysis using sieves No.100, No.50,No.30,No.16,No.8,No.4 the fineness modulus is found to be equal to 4. What is the average size of the sample?

    $$$$$$$$$ the average size = No.16 sieve size

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