factors affecting strength of concrete pdf

The use of well-graded aggregates gives higher strength to the concrete.Hence please remember, use as less water as possible during concrete mixing and use as more as possible after concreting.The strength of concrete increase with the increase in the rate of loading because at the high rates of loading, there is less time for creep. In rapid loading, the load resistance is better than the slow loading.The strength development of concrete depends on both time and the temperature. You will receive a link and will create a new password via email.Sorry, you do not have permission to ask a question, You must login to ask question.

The maturity of the concrete is helpful in estimating the strength of the concrete at any other maturity as a percentage of the strength of concrete at full maturity.Weather condition also affects the strength of concrete due to different reasons. Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete. There are instances where higher grade cement is being used even for low strength concrete, as mortar or even for plastering. 1. Aggregates are the key factors that will affect the impact strength of the concrete under aggressive load condition. When the water cement ratio is less than 0.4, there is improper consistency and workability of the cement and honeycombed structure.With an increase in the cement to aggregate ratio, the ultimate strength will increase to some extent. Generally, the water/cement ratio of 0.45 to 0.60 is used. CONCRETE FACTORS AFFECTING CONCRETE STRENGTH Concrete strength is effected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete. Ten hours curing at a temperature of about 90 degree Celsius will make attain 70% of its 28 days of strength.The use of larger size aggregates leads to higher strength i.e larger the size, lower will be the surface area and the water requirement is lower. The ratio of the weight of water to the weight of cement is called Water/Cement ratio. Bharat Chaudhary

It is the most important factor for gaining the strength of concrete. The factors affecting the strength of concrete are mentioned below. 1. If there was 10% trapped air in the concrete, the strength will fall down in the range of 30 to 40%.The rate of hydration reaction is temperature dependent. Also, the specimen should be tested immediately after taking it out of the curing tank in order to give uniformity to the results as compared to the testing of samples which may have dried at different degrees. I am sure many lay persons, technicians and students would benefitnice those notes are good in it safe me alot when doing my assignmentsI need to know if slump is not meet spec or requirement what must may do reject the concrete truck or? The strength of the concrete increases with the cement content and decreases with air and water content. Now see whatIs it advisable to do mortar mixing for RCC roofing on the another RCC roofNo matter where you mix the mortar. Normally, concrete strength gets doubled after 11 years provided there are no adverse factors.For concrete that has to be compacted by a vibrator, a lower water cement ratio may be used. Maturity = Σ ( Time x Temperature ). However, for aggregates that are less than 25mm in size, 100mm cube is allowed.

In the case of lean mixes, the larger aggregates will give higher strength. The maturity of the concrete is helpful in estimating the strength of the concrete at any other maturity as a percentage of the strength of concrete at full maturity.Get all latest content delivered straight to your inbox.

Factors Affecting Strength and Durability of Concrete Made with Various Cements K. RosE, B. Factors influencing the compressive strength of fly ash-based geopolymer concrete.pdf Ci vi l E ng in ee ri ng Di me ns io n, Vo l. 6, No . We at engineeringcivil.com are thankful to Sir Kaushal Kishore for submitting this research paper and helping all civil engineers understand the concept of Concrete Strength and factors affecting it. It produced cracks in concrete.With the certain degree of temperature increase, the rate of hydration process increases in it which, it gains strength rapidly. For a given cement content, the workability of the concrete is reduced if the water/cement ratio is reduced. This paper also deals with the various application, economical and environmental benefits of geopolymer concrete. HoPE, AND A. K. C. IP This investigation examined variables influencing the 28-day com­ pressive strength and SO-cycle salt scaling loss of concretes made with 18 Type … With the change in moisture content, materials expand and contract. Generally, 150mm cubes are specified irrespective of the size of the aggregates.

The water-cement ratio is the ratio of volume of water mixed in concrete to volume of the cement used. The strength of the concrete can be more correctly related to this ratio. The relationship between the strength and the gel-space ratio is independent of the age.8- Effect of Size of Maximum Size of Aggregates on the strength

Note: Compressive Strength (CS) of cement given are average values.

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