7.1.3. Cohesiveness

Try these first

1. 1.

   Name one factor that affects cohesiveness in concrete.

   Hint

   Think about the components of the concrete mix.

2. 2.

   What is segregation in concrete?

   Hint

   Consider how materials might separate in a mix.

3. 3.

   What is the main property of concrete that allows it to remain uniform during mixing?

   • Cohesiveness
   • Viscosity
   • Density

   Hint

   Consider which property helps in holding aggregates together.

4. 4.

   True or False: Excess water in a concrete mix can improve its cohesiveness.

   • True
   • False

   Hint

   Think about how fluid the mix becomes.

5. 5.

   Given a concrete mix that experiences frequent segregation, recommend an alternative mix design focusing on cohesiveness while maintaining required workability. Explain your choices.

   Hint

   Consider how changing proportions and components can influence cohesiveness.

6. 6.

   Discuss the importance of cohesiveness in high-rise building constructions, specifically addressing challenges previously encountered due to poor cohesiveness.

   Hint

   Think about how gravity and weight distribution in tall structures relate to concrete performance.