Accelerated Curing of Concrete Cubes Using Warm Water

There are a lot of arguments on which method of curing concrete gives good strength. These different opinions results into this study, which aim at investigating the effects of different curing methods on the strength of concrete. Laboratory test was employed for this study. Normal concretes were prepared using specified mix ratio of 1:2:4 and 1:3:6. The cubes tested for compressive strength at 3, 7, 21, and 28 days of curing respectively using four curing methods namely immersion, sprinkling, polythene sheeting and sharp sand coating. Testing indicate that water immersion curing method as well as sprinkling (spraying ) methods of curing, provide better results than membrane (polythene sheeting) method of curing. While sharp sand gives least strength. The rate of drying was significant when the specimens were subjected to curing with polythene sheet method of curing. This thus hampered the hydration process and thus affected the compressive strength property of the hardened concrete. The overall findings of this study suggests that concrete should be cured by water immersion or spraying regularly to achieve a better compressive strength in concrete.

International Journal Of Engineering And Computer Science, 2016

Different methods are usually adopted to cure concrete. Concrete strength partly depends on the method and duration of curing. The structural use of concrete depends largely on its strength, especially compressive strength. This study uses three curing methods to determine their effects on the compressive strength and density of concrete. These methods are immersion of concrete cubes in curing tank (Ponding), covering of cubes with wet rug (Continuous wetting) and the use of polythene sheet (Water-barrier). Laboratory experimental procedures were adopted. A total of sixty (60) cubes were cast with 1:2:4 mix ratios. The cubes were cured in the laboratory at room temperature. The results showed that the average compressive strength values for 28-day curing vary with curing methods. The cubes cured by immersion have an average compressive strength of 29.7 N/mm 2 while the ones cured by wet rug and polythene sheet have average compressive strength of 26.8 and 24.7 N/mm 2 respectively. The traditional curing by immersion appeared to be the best method to achieve desired concrete strength.

Journal of Social and Development Sciences

The structural use of concrete depends largely on its strength, especially compressive strength.Various tests were carried out to ascertain the properties of concrete materials, whereas test performances ofthe concrete with different mix ratios at specific ages of curing were undertaken. The study determined thecompressive strength of concrete using different curing methods. Four different methods of curing (ponding,continuous wetting, open-air curing and sprinkling with water) were used. Seventy-two (72) cubes were castusing a mix ratio of 1:2:4 and 1:3:6 with 0.5 water cement ratio and with 0.6 waters cement ratio respectively.The compressive strengths were determined after 7 days, 14 days and at 28 days of curing. Findings showthat for 1:2:4 concrete, maximum of 28-day compressive was the highest for concrete cured by ponding andthe least was by sprinkling water. Further findings show that for 1:3:6 concrete, maximum of 28-daycompressive strength was obtained using ponding and th...

UET, Lahore, 2015

The study presents the results of experiments on the effects of curing methods and curing ages on the compressive strength development of ordinary Portland cement concrete in a plain environment (as in Lahore). Ten concrete cube specimens of mix 1:1.5:3 were prepared with water-cement ratio of 0.5 for each of the four curing techniques (air curing, water-submerged curing, polythene curing, curing by boiling) for testing ages of 3, 7, 14, 21 and 28 days when their compressive strengths were determined. The results showed that water-submergence method of curing produced concrete cube specimens with the highest 28-day compressive strength of 41.42 MPa. The results obtained encourage the use of curing by boiling method in lab for mix design of concrete and also suggests limiting the use of the other curing methods to 28-days period. It was concluded that there exists a positive correlation between curing, curing period and compressive strength of concrete specimens. This study also provides information on the importance of curing and various other techniques for undertaking the process on site.

International Organization of Scientific Research, 2023

Concrete derives its strength by the hydration of cement particles and hydration requires sufficient moisture. The curing can be considered as keeping the concrete moist and warm enough so that the hydration of cement can continue. The principal aim of this study is to predict effect of curing period on the properties of concrete. The curing period was variable in this study. The properties of materials are determined according to ASTM specification and only one mix proportion is used. In this study, a series of concrete cylinders were cast and cured for 0, 3, 7, 14, 21 and 28 days. Each specimen was tested at 28-days and basic properties such as compressive strength, tensile strength and modulus of elasticity were determined. Mix proportion 1:2:4 (by volume) was considered and water cement ratio was 0.5 (by weight). Specimens were immersed in water for curing. The test result shows that compressive and tensile strength increases linearly and gradually with the increasing of curing periods respectively. Also increasing rate of tensile strength is slower for short period rather than long period.

This investigation thought about the impact on strength qualities of concrete under various techniques for curing conditions. Here in this paper we report two solid blocks with the blend of 1:1.6:3.35 and 1:1.35:2.19 which were set up with the water cement ratio as 0.45 and 0.29 respectively. The cast concrete specimens were cured utilizing six techniques (air curing, water-submerged curing, polythene curing, sand curing, lime curing and burlap curing) until testing ages of 7 and 28 days when its strength qualities are resolved. The paper reports that by observing the test results of M30 grade concrete in case of 7days, water curing is giving optimum values whereas for the 28days lime curing gives maximum values in compression strength. For M60 grade concrete in 7days test water curing gives maximum values and for 28days moist sand curing gives maximum value in compression strength.

IAEME PUBLICATION, 2016

Today in this fast growing world where time and money are very important, builders and constructors cannot invest their precious 28 days in curing of each and every element of the of the structure. Among the factors affecting the quality of concrete, curing temperature and curing material should also be focused. Curing for 28 days become a problem in high rise structure. For this cubes for mix design M-25 were cast using Pozzolana Portland Cement and were cured for 3, 7, 14, 21 and 28 days and were be tested for characteristic compressive strength. The concrete cubes gain about 71-73%, 85-86%, 93-94%, 103-108%, and 118-124% of target characteristic compressive strength for Pozzolana Portland Cement if cured for first 3, 7, 14, 21 and 28 days respectively.

Pre-stressed Concrete is very useful now a days. It has less shrinkage, less creep and reduced deflection due to dead and live load. Material properties are improved in Pre-stressed concrete. Also total construction time is also less in case of prestressed concrete. One of the major properties of concrete that makes pre-casting economically feasible is its ability, under the proper conditions, to gain compressive strength extremely rapidly. In this paper, various methods to increase the curing rate for precast concrete are discussed. Different methods for accelerating the curing process are: 1) the use of physical processes, and 2) the use of admixtures to act as catalysts for the hydration process, resulting in the achievement of high compressive strengths in relatively short periods of time. Many physical processes used to increase the curing process are generally obtained by increases in curing temperature, introduction of moisture to curing environment. Numerous methods exist, including conductive/convective heating, electrical resistance heating, and steam curing (low and high pressure).

2013

This study considered the effect of different methods of curing on density and compressive strength of concrete. Concrete cube specimens of mix 1:2:4 were prepared with water-cement ratio of 0.65. The cubes were cured using six methods (air curing, water-submerged curing, spray curing, polythene curing, moist sand curing and burlap curing) until testing ages of 3, 7, 14, 21 and 28 days when their densities and compressive strengths were determined. The results showed that densities of the specimens ranged from 2432.59 to 2502.72 Kg/m 3 . Also, moist sand curing method produced concrete specimens with the highest 28-day compressive strength of 30.5N/mm 2 followed by the burlap curing method with a value of 24.4N/mm 2 . Air curing method showed a 15% reduction in strength after 21-days thereby resulting in the lowest 28-day compressive strength of 17.8 N/mm 2 . It was concluded that there exists a weak positive correlation between density and compressive strength of concrete specimens.

World Journal of Advanced Research and Reviews

This paper presented the findings of an experimental investigation into how common Portland cement concrete develops its compressive strength in a simple setting, such as Lahore, Pakistan. Ten concrete cube specimens of mix 1:1.5:3 was prepared with water-cement ratio of 0.5 for each of the four curing techniques (air curing, water-submerged curing, polythene curing, curing by boiling) until testing ages of 3, 7, 14, 21 and 28 days when their compressive strengths were determined. The findings demonstrated that concrete specimens produced using the water-submergence technique of curing had the maximum 28-day compressive strength of 41.42MPa. The findings indicate avoiding boiling as a curing process and restricting the use of other curing techniques to a 28-day timeframe. It was determined that there is a positive link between concrete specimen curing, curing duration, and compressive strength. This study also offers details on the significance of curing and numerous different metho...