Individual Discussion Question:
Based on each team’s actual mixing results and what you know about the effects of water cement ratio on the strength and workability of PCC. Order the teams from 1 to 6 based on which team you think will have the highest compressive strength. If you think more than one team will have the same (or approximately the same) strength then rank both equally. Explain your ranking.
Individual Discussion Answer:
Common Knowledge is with more water PCC becomes less viscous and therefore easier to manage. Further the list shows below other factors occurring when increasing water to cement ratio.
1. Compressive Strength
2. Resistance to cycles of freezing and thawing
3. Resistance to damage from Sulfates in soil and water
4. Permeability – and its associated impact to strength and various durability characteristics
5. Minimizing potential for corrosion of reinforcing steel
RANKING OF GROUPS: 1= strongest & 3= weakest
(**Note: In order of theoretical compressive strength properties.)
<#1> Group 1&2 | <#2> Group 3&4 | <#3> Group 5&6
Reference:
http://www.cemexusa.com/productsservices/files/technicalservices/effectsofwateradditionstoconcrete.pdf or their homepage http://www.cemexusa.com/
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