Effect of Curing Methods on the Compressive Strength of Concrete

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.

Concrete is the most important and most consumed construction material in global construction industry. The properties of concrete are greatly influenced by properties of its constituents and curing methods utilized for preparation of specimens. This study is focused on investigating the influence of three common curing methods, i.e., ponding, sprinkling and wet cover curing on compressive strength behavior of concrete. In total, 45 cubes were casted and tested after curing for 3, 7, 14, 28 and 56 days. The obtained results suggest that ponding method of concrete curing is most effective among all the three methods of concrete curing considered in this study. After ponding, the performance of concrete cured with wet cover curing method was quite acceptable. Moreover, the study also suggested that sprinkling method of curing gives lowest compressive strength due to greater moisture movement which abates the hydration of binder in concrete. This study will be helpful for construction practitioners in deciding the best-suited curing method under given conditions and available methods of preparation of concrete.

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.

Quaid-e-Awam University Research Journal of Engineering, Science & Technology, 2020

Concrete is the most important and most consumed construction material in global construction industry. The properties of concrete are greatly influenced by properties of its constituents and curing methods utilized for preparation of specimens. This study is focused on investigating the influence of three common curing methods, i.e., ponding, sprinkling and wet cover curing on compressive strength behavior of concrete. In total, 45 cubes were casted and tested after curing for 3, 7, 14, 28 and 56 days. The obtained results suggest that ponding method of concrete curing is most effective among all the three methods of concrete curing considered in this study. After ponding, the performance of concrete cured with wet cover curing method was quite acceptable. Moreover, the study also suggested that sprinkling method of curing gives lowest compressive strength due to greater moisture movement which abates the hydration of binder in concrete. This study will be helpful for construction ...

Concrete work is major part of civil constructions. To achieve the required strength of concrete, it is necessary to control the properties of coarse and fine aggregate used as well as curing of concrete poured structures at early stages also plays an important role. Curing involves controlling of temperature during early stages of cement hydration. The opening of concrete structures such as Bridges, Flyovers and Underpasses for public at earliest possible time is a matter of common interest for both the contractors and the clients. To minimize the construction costs, contractors desire to proceed quickly while the client wants to minimize the construction related delays. To complete the work at stipulated time period, no one takes care about the curing of concrete structures. The focus of this research work is to analyze the effect of different types of curing on compressive strength of concrete structures. For this purpose, 54 test specimens of cylindrical shape were prepared. These specimens were cured with different methods and were tested on different age days to analyze the effect curing on compressive strength. Test specimens cured with conventional water curing method gives the highest results as compared to the other methods adopted.

This paper presents the results of an experimental study on the effects of curing methods and curing ages on the compressive strength development of ordinary Portland cement concrete in a tropical environment. Fifteen (15) concrete cubes each were cured by immersion in potable water, immersion in lime water, covering with wet rug, covering with plastic sheets and air-drying. For each of these curing methods, the average compressive strength of concrete cubes was determined after 3, 7, 14, 28 and 90 days curing periods. The results obtained discourages the use of curing by air-drying method and also suggests limiting the use of the other curing methods to 28-days period. Generally, the highest compressive strength was obtained for concrete cured by immersion in lime water.

This experiment work was carried out to investigate the effect of concrete strength in terms of compressive strength for M25 and M30 concrete by adopting immersion curing, wet gunny bags curing and steam curing as per IS 10262-2009. Traditionally quality of concrete in construction work is calculated in terms of its 28 days compressive strength. This procedure requires 28 days of moist curing before testing which is too long a period to be of any value for either concrete construction control or applying timely corrective measures. What is essentially needed for assessing quality of controlled concrete is an acceptance test which can supply result within about 24 hrs. after casting. With the assistance of reliable test methods employing steam curing techniques it is now possible to test the compressive strength of concrete within a short period. The result of investigation demonstrate that superior strength is achieved by Immersion curing than the other two types of curing. But the strength achieved in steam curing within 6 hours is nearby to Immersion curing.

Journal of Engineering Research and Reports, 2021

An experimental investigation was conducted to evaluate the impact of different curing practices on the porosity and compressive strength of concrete. The targeted compressive strength of the concrete at 28-day of curing was 20 N/mm2. Plain concrete cubes were prepared with a mix ratio 1:1.5:3 by weight and 0.6 water-cement ratio. A total of 120 concrete cubes were tested on 7th, 14th, 21st, 28th and 56th day curing periods for slump, porosity and compressive strength. The four curing methods used were immersion, jute sack, plastic sheet and sprinkling which were all carried out in the laboratory under the same average environmental conditions of 27 ± 20°C temperature and 75% relative humidity. The results from the study showed that slump values were within the range of 52mm to 58mm which is within the medium range of 25 to 100mm, hence a true slump was achieved. The porosity of all samples decreased with age (i.e. at the dried state, immersion recorded the lowest 4.35%, followed by...

International Multilingual Journal of Science and Technology (IMJST) , 2021

Different curing methods are usually adopted to evaluate the compressive strength of concrete. This study reports the laboratory results of the effect of curing methods on the compressive strength as well as the density of concrete. A total of 72 cubes of mix ratio 1:2:4 were investigated after subjecting them to various curing conditions, with the aim of finding which of the curing method is best. The cubes were cured in the laboratory at an average temperature of 28•C (82.4•F). The results obtained showed that the average compressive strength values for 7, 14, 21 and 28 days, vary with curing methods. The results show that ponding had the highest compressive strength and density, followed by wet covering, sprinkling, then uncured for two days, with the totally uncured cubes having the least compressive strength and density as well as highest shrinkage limit. Ponding method of curing was recommended to be the best of all the curing methods. Based on the results and discussion of this study, the following conclusions can be drawn: 1. Ponding was the most effective method of curing. It produced the highest level in compressive strength and cube densities. 2. Increase in both compressive strength and cube densities is a function of curing method. 3. Totally uncured method of curing produced the least compressive strength as well cube densities. 4. Totally uncured concrete shrinks faster when compared to other curing methods.

TJPRC, 2014

The present paper deals with the impact of insufficient curing on the strength of M15 concrete. The parameters of the study include the curing periods 3, 7, 9, 12,15,18,21, 24 and 28 days for <25° C, curing techniques adopted were air and captivation under water using Portland Pozzolona Cement. The specimen cubes were cast and cured under dissimilar conditions prior to testing. The study demonstrates that the method and duration of curing to a great extent affects the strength of concrete. Hence, excellent management of proper field curing is of the extreme significance. On the basis of interpretation of the results the following outcomes were made. Firstly, full time curing for 3 days and then air curing up to 15 days for <25° C gave desirable compressive strength of 15.90 N/ mm2 and was seemed adequate & justified. Secondly, 5,7,9 and 12 days full time curing with air curing up to 15 days for <25° C later was found to produce the concrete with sufficient strength, more than that desired for M15 concrete. Finally, full time water curing for 7 days is justified, as it gave the desirable compressive strength of 15.20N/mm2 of M15 concrete. In conclusion, the study makes a value addition in the parameters like conservation of water, reduction in project duration and expenditure on electricity/fuel, which in turn reduces the overall cost of the project in the regions where temperature is below 25° C.