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Property of Green Concrete - Civil Experience

Plain concrete generally refer as a concrete mixer which is a mixture of a variety of materials like binding material ( cement, lime etc ), fine aggregate, coarse aggregate and water

Property of Green Concrete

In some case, a special type of concrete property create by using glass powder, fly ash etc to reduce the environmental impact and make eco-friendly concrete mix

It can be easily moulded to any desired size & shape before it loses its plasticity and hardens property

Strength of concrete varies depending upon the proportion of ingredients. Which can be achieved or utilise by mix design procedure ( M10, M15, M20, M25, M30, M35, M50) at the site of construction sites

The main function of concrete material kept in mind that voids which available in the coarse aggregate are filled with sand ( fine aggregate ) and voids in the sand are filled with cement paste

Workability

Workability of concrete can be defined as concrete which can be easily mixed, adequately placed inside of any shape of formwork, consolidated with easily with the availability of technic and finished with a smooth surface
Workability also can be defined as the amount of internal work required for concrete to compact to achieve optimum density

Workability depends upon various factors like the quantity of water, grading, size, shape and percentage of the aggregate
     
Workability of plan green concrete is measured by
  • The slump test
  • Compaction test
  • Vee-Bee consistometer test

Segregation

Separation of coarse aggregate particles from the green concrete or fresh concrete is defined as segregation

When concrete throwing from greater heights at the time of placing segregation may happen due to lack of sufficient quantity of fine aggregate/particles in concrete

End of result segregation happened, and the cohesiveness property of the concrete is lost, and honeycomb creates in concrete. Ultimately results in the loss of concrete strength of hardened concrete

Bleeding

It seems the same like separation of concrete But bleeding related to the appearance of water alone with cement paste on the surface of freshly laid and concrete levelling be smooth

Generally, Bleeding happens due to an excessive quantity of water in the concrete mix also due to excessive compaction of concrete

Bleeding results in creating pores and weakening of concrete

Bleeding can be eliminated by controlling the quantity of water in the concrete mix also by using finer grading of aggregate

Harshness

Harshness can be defined as the resistance of concrete to the finished surface

Harshness happened due to the presence of the insufficient amount of fine aggregate, cement mortar and also due to the use of non-graded aggregates also may result due to insufficient quantity of water used in the making of mix design

achieving of Smooth surface is difficult with harsh concrete

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2 comments

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