workability of concrete - types and impact on concrete,workability of concrete can be classified into 3 types as follows. 1. highly workable concrete. highly workable concrete is very easy to mix, pour, consolidate due to the high water content in mixed concrete. transportation and placing of concrete can be a bit difficult due to the high amount of water present in the concrete mixture..all about workability of concrete - structural guide,a workable concrete is a must to do construction work without much difficulty. therefore, it is much important to study the factors affecting workability of concrete. factors affecting workability of concrete. water cement ratio; mix proportions; size of the aggregates; shape of the aggregates; grading of aggregates; surface texture of aggregates.
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factors affecting the workability of concrete. the workability requirements for a concrete construction depends on: 1- water cement ratio. 2- type of construction work. 3- method of mixing concrete. 4- the thickness of the concrete section. 5- extent of reinforcement. 6- method of compaction. 7- distance of transporting. 8- method of placement. 9- environmental condition. types of workability of concrete
factors affecting workability of concrete: water content: the higher the amount of water per m3 of concrete, the higher the fluidity of concrete which affects the workability. high water content can lead to increased bleeding and separation of aggregates, resulting in poor quality of concrete. mix proportions:
the weather condition has a significant effect on the workability of concrete. as the temperature increase, the evaporation process becomes rapid, and concrete loose water content quickly. as the water content in concrete reduces, workability also gets reduced.
followings are the factors affect the workability of concrete. water content; aggregate/cement ratio; mix proportions; size of aggregates; shape of aggregates; grading of aggregates; surface texture of aggregates; use of admixtures; use of supplementary cementitious materials; time; temperature; water content. it is the most important factor of workability.
factors affecting workability of concrete 1. water content : the amount of water content available in a volume of concrete will have a significant effect on the workability of concrete. the higher the water content per cubic meter of concrete the higher would be the fluidity of the concrete.
workability of the concrete depends on a number of interrelating factors. water content, aggregate properties, use of admixtures, fineness of cement are the factors affecting workability. water content: the increase in water content increases the fluidity of the concrete thus providing greater lubrication.
a surface texture, such as rough surface and smooth surface of aggregates affects the workability of concrete in the same way as the shape of aggregates. rough textured surface area aggregates have a more surface area than the aggregates of
factors affecting durability of concrete listed below. high humidity and rain; ultraviolet resistance; chemical resistance; seawater exposure; chloride resistance and steel corrosion; sulfate resistance; resistance to alkali-silica reaction (asr) carbonation; abrasion resistance; moderate to severe exposure condition for concrete; resistance to freezing and thawing
factors affecting the durability of concrete: the durability of concrete depends on the following factors as follows: water/cement ratio: higher water/cement ratios are the reason for larger permeability, so for durable concrete using a lower w / c ratio is helpful.
factors affecting durability of concrete. following are the factors affecting durability of concrete. cement content; aggregate quality; water quality; concrete compaction; curing period; permeability; moisture; temperature; abrasion; carbonation; wetting and drying cycles; freezing and thawing; alkali-aggregate reaction; sulfate attack; organic acids; 1. cement content
the factors that affect the workability of concrete are given below: 1- water content of the concrete mix. the water content will have important influences on the workability in a given volume of concrete. the higher the water content per cubic meter of concrete, the higher will be the fluidity of concrete, which affect the workability.
the water-cement ratio is the most important factor which affects the workability of concrete. generally, a water-cement ratio of 0.45 to 0.6 is used for good workable concrete mix (without the
slump test can be used to find out the workability of concrete. factors affecting concrete workability: water-cement ratio; amount and type of aggregate; amount and type of cement; weather conditions. temperature; wind; chemical admixtures; sand to aggregate ratio; i. water content or water cement ratio. more the water cement ratio more will be workability of concrete.
widely in concrete and also in other civil engineering field. by the researchs done in overseas, pfa is known as the admixtures that can improve the workability and strength of the concrete. moreover, the water demand in concrete is decrease by the addition of pfa.
it is obvious that workability is a property of freshly mixed concrete. therefore, it is affected by the properties and proportions of the concrete mixtures. following is an outline of the factors affecting the workability of concrete. 1. water content [water-to-binder ratio] workability of concrete is directly proportional to the water content.
in this article we discuss some of the the factors which affect the workability of the concrete following factor are affected workability of concrete - water content :-
factors affecting workability. workable concrete is the one which exhibits very little internal friction between particle and particle or which overcomes the frictional resistance offered by the formwork surface or reinforcement contained in the concrete with just the
flaky and elongated aggregates may affect the workability of fresh concrete making it porous and hence permeable and will also active less strength. rough textured angular aggregates are recommended but they require more cement content for getting good bonding.
factors affecting the workability of concrete. the elements affecting the workability of concrete can be list as follows: 1. water content. workability improves with the increase in water content in concrete and vice versa. 2. mix proportion. aggregate-cement
the workability of any grade of concrete mainly depend upon the w/c ratio means to depend on the amount of water added into the concrete mix in which water plays a great role as a lubricant in green concrete. the mobility/fluidity increase with the addition of water into concrete which is important factors affecting the workability
concrete transported in a transit mixer maintains the workability of concrete yet while transporting through wheel barrows change the physical condition of concrete particularly if the track is bumpy and is longer than there occurs high chances that the concrete may get segregation specially if the concrete is not homogeneous or the aggregates are not well graded or the sand is too fine.
the size of aggregate matter on the workability of concrete, if the size of aggregate is more then the requirements of water increase, due to lubricating the aggregate from the cement paste with the surface of aggregate which increases the workability of concrete also increases in the chances of segregation due to floating in the slurry.
the higher the water content, the higher will be the fluidity of concrete, which is one of the important factors affecting workability. a/c ratio. the higher the aggregate/cement ratio, the leaner is the concrete; in lean concrete, less quantity of paste is available for lubrication, per unit surface area of aggregate and hence the mobility reduce
factors affecting the workability of concrete. water content; mix proportions; size of aggregates; shape of aggregates; grading of aggregates; surface texture of aggregates; use of admixtures; use of supplementary cementitious materials; time; temperature; these factors are briefly discussed below. water content. it’s the most significant workability variable.