Table 1 shows the various quantities of materials needed for several different concrete mixes. Mix #1 is the 'standard' mix without the use of admixtures, while both Mixes #2 and #3 were produced with the aid of one (1) specific type of admixture. i. State the name/type of this specific admixture that was used for Mix #2 and Mix #3. ii. Explain the two (2) main functions of this admixture. For each

Structural Analysis
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Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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Table 1 shows the various quantities of materials needed for several
different concrete mixes. Mix #1 is the 'standard' mix without the use of
admixtures, while both Mixes #2 and #3 were produced with the aid of
one (1) specific type of admixture.
i.
State the name/type of this specific admixture that was used for
Mix #2 and Mix #3.
ii.
Explain the two (2) main functions of this admixture. For each
function, also include its benefits to the concrete.
Table 1: Material quantities required for several concrete mixes
Mix
Admixture used
Cement (kg)
Water (kg) W/C ratio
#1
No
600
270
0.45
#2
Yes
600
243
0.41
#3
Yes
540
243
0.45
Transcribed Image Text:Table 1 shows the various quantities of materials needed for several different concrete mixes. Mix #1 is the 'standard' mix without the use of admixtures, while both Mixes #2 and #3 were produced with the aid of one (1) specific type of admixture. i. State the name/type of this specific admixture that was used for Mix #2 and Mix #3. ii. Explain the two (2) main functions of this admixture. For each function, also include its benefits to the concrete. Table 1: Material quantities required for several concrete mixes Mix Admixture used Cement (kg) Water (kg) W/C ratio #1 No 600 270 0.45 #2 Yes 600 243 0.41 #3 Yes 540 243 0.45
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