Curing of concrete – definition, time, methods & important | Curing of concrete | Curing of concrete definition | Curing methods, advantages, importants and curing time.
Curing of concrete
Curing of concrete is the last and one of the most important process to be play a major role in the process of concrete construction which is promote the hardening of cement after placing of concrete for a short period in the concrete surface.
Proper Curing of concrete in construction structures are increase the durability and impermeability of concrete and shrinkage is reduced, this activities is protects the concrete surface from sun and wind.
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1)what is concrete and its types and properties
When water is added to concrete ,this water remain in three forms as combined water, gel water and capillary water, it is the process of prevention of capillary water and maintaining moisture and temperature of concrete.
Curing of concrete definition
Curing of concrete is defined as providing the water content within the temperature and time to involve a chemical reaction or physical action takes place resulting in the concrete to achieve the desired properties like as harder, tougher or more stable linkage bond for properly specified and performed in the intended use.
What is curing in concrete?
Curing is the operation of keeping freshly placed concrete moist for insure complete hydration of cement and to obtain properly hardened concrete, in fact due to the development of strength of concrete takes place only in presence of water ,so a proper environment humidity and temperature has to be maintained very important.
Advantages of curing in concrete
1. Curing of concrete is prevent the capillary water.
2. It supplies efficient amount of water for hydration of cement
3. Improve environment humidity and temperature of
4. Improve the impermeability and durability.
5. Reducing the shrinkage.
Curing of concrete methods
There are mainly six methods used for curing of concrete that is following-:
1. Shading concrete
2. Covering concrete surfaces with jute bags.
3. Ponding with water.
4. Steam curing.
5. Membrane curing.
6. Sprinkling curing
Shading curing of concrete
Shading curing of concrete-: this curing of concrete is the most commonly used method, in this method the concrete structures are kept immersed in water for a specific periods. Precast concrete structures are mainly used in this method.
Covering concrete surfaces
Covering concrete surfaces -: this curing of concrete is wet covering for the concrete structures which is wet covering like as jutty bags,jute matting are wrapped around vertical surface of the concrete structures for keeping the concrete wet, this method is mostly used in vertical column.
Ponding with water
Ponding with water-: this curing of concrete method is suitable for horizontal structure like as beam & slab, in this method the surface of concrete structures will be divided into suitable size rectangle and the these ponds formed are filled with full fledged of water along the divided suitable sizes with the clay or cement, water should be filled in the pond different times a day depending upon the environment condition like as climate change in the types of winter , summer. Increase in temperature is not desirable.
Steam curing-: steam curing concrete is kept in steam to accelerate hydration of cement particles it results in faster development of strength, in this curing method temperature maintained about 75 degree celcius due to reasons of absence of humidity concrete dries up soon, heating should be uniform. At this temperature within 4 to 5 hour, the concrete can gain about 70% of its strength. Mainly stream curing is used for precast elements.
Membrane curing-: this type of curing method is covered by waterproof membrane like as bitumen emulsion, wax, rubber latex emulsion, plastic film etc. In this method the membrane protects the water loss from concrete.
Sprinkling curing-: in this method, water is sprayed on the concrete with the help of nozzles at proper interval by piping network connection, this method is not so effective due to the difficulty of keeping the concrete surface be moist all the time.
Curing period of concrete as per Is code
Curing period of concrete as per Is code 456 – 2000 should be 7 days for ordinary Portland Cement and concrete with admixtures or blended cement must be at least 10 days otherwise in hot weather and arid temperature conditions, the curing period of concrete should be 10 days and concrete with admixtures and cement blended must be at least 14 days.
Why curing period of concrete is important?
Curing period of concrete is most important to provide enough moisture to freshly concrete surface within the help of different methods like as water curing method, steam curing, membrane method, sprinkler method for strength development and maintain the durability of concrete.
Efficient and properly amount of moisture required to freshly construction of concrete surface for continued hydration and reduce the evaporation, shrinkage that resulting development of strength, volume stability, resistance to freezing and scalling resistance and together highly linkage bond as a form of hardened solid. Even cracks will generate due to lack of curing, so in order to avoid this we must necessary to cure the concrete. This is play an important role to effect the strength of concrete.
Curing concrete with water
Curing concrete with water on freshly concrete is one of oldest most commonly used method to cure your concrete, these methods are adopted in three categories water immersion method, wet covering method, water ponding method. Curing concrete is down frequently with water five to ten times per day for seven days that is allows the moisture in the concrete to evaporate slowly, resulting concrete continue to gain strength.
How long to keep curing concrete with water?
Regarding this, “how long to keep curing concrete with water?”, its all depends on temperature, mix design and weather conditions, but in modern techniques curing time of concrete must be duration of 14-21 days and advisable to keep concrete moist for at least 7 days.
In concrete curing methods, concrete are kept immersed in water for a specific period, wet covering such as gunny bags, jute Matting are arround wrraped in vertical surface of the concrete and surface structure will be divided into durable sized for keeping the concrete pouring as long as it retains moisture and gain strength.
Curing of concrete time
Curing of concrete time should be proper due to the strength of concrete depend into proper curing by the environmental conditions, structural member, weather temperature, curing of concrete time should at least 28 days for complete cured, in the modern techniques curing time of concrete must be 14-21 days and advisable to keep concrete moist for at least 14 days.
Curing of concrete how many days?
Curing of concrete according to structural member and environmental to change, the curing can be achieved in 14-21 days and completely moist in 28 days, as per IS code concrete should be cured at least 7 days for OPC and 10 days for concrete with blended cement and hot weather conditions, the curing should be 10 days for OPC and concrete with blended cement is at least 14 days.
Curing time of concrete slab
Curing time of concrete slab with ordinary Portland cement is minimum 21 days and slab with lesser span like as sides of foundation, columns, beam takes moist for 48 hours. Slabs on pavement, driveways, canal lining are take curing time a minimum 7 days, and also structural concrete slab like as bridge decks, column, beams, pier ,small footing retaining wall require a curing time of minimum 7 days.
Curing of concrete slab
Curing of concrete slab with span 4 to 6 meter undesirable concrete slab, arches and beams ara cure at least 14 days and sides of foundation, column and etc is moist for 48 hours and concrete slab with ordinary Portland Cement is minimum for 21 days.
How long concrete cure?
Regarding this, “how long concrete cure?”, the concrete construction structures takes dry enough to 24 to 48 hours for used in activity on it, however
water is added to the concrete surface are kept wet for a specific period so as to promote the hardening of cement, increase the durability and permeability.
Curing of concrete event continuous 7 to 10 days, then cement particles reacting with the water it is mixed with, as the water molecules bonds with the cement, then the concrete hardening a little bit more each day, so as even after gaining full strength concrete.
The concrete structures within 7 days curing achieving the at least 70 percent of its full strength and in 28 days concrete as fully hardened.
How long concrete cure are depend upon some several factors that can affect the concrete cure time, these are following-:
3. Mix design
Moisture-: I know that water molecules is interactive with cement and bonded chemically each other, when there is less water for concrete, there are fewer bonds to make, it is gain strength accordance to bond, means that is not gain full strength otherwise there is too much water, it will take longer to cure, efficient bond between water molecules and cement and gain full strength of concrete.
Temperature-: temperature is play a vital role in affect the long concrete cure, moisture evaporated faster when temperature is high so concrete will cure faster, this method is useful when adopted the curing process of concrete in cold weather conditions.
Mix design-: also mixed design affect the add a accelerant to the mix for concrete to cure faster, due to speeds up the setting time not efficient to gain full strength of concrete.
How long concrete cure before rain?
Regarding this, “how long concrete cure before rain?”, if the concrete structures cure to specific time typically 24 to 48 hours after mixing then it starts raining may not be serious damage strength of concrete.
Water is a play important role of all concrete components due to mixing with cement bonded together it to hydrate and gain strength but freshly mixed concrete has been placed, after rain water can do much harm due to rain will wash some of the cement out of the concrete at the surface like as bleeding takes place, its strength is comprimise, increase the dusting and surface scalling & craze cracking.
During the place of freshly mixed concrete in slab structure rain can have damage the potential detrimental impact due to rain water oversaturate the concrete that’s reason the additional water can be absorbed by the adding the fresh concrete so change the water cement ratio.
Some tips for preventing rain after concrete cure
1. When the raining after concrete cure use a float to push the water off the edge of the slab.
2. Concrete structures do not work during the driving of rainwater,this is the biggest affecting mistake you can make.
3. Effective concrete surface due to raining like as seen on this stamped concrete most do the scaling and spalling on these surface.
How long concrete cure before driving on it
The concrete surface are having a freshly concrete driveway poured is how soon they will be ready for use depend on a number of variables, speeding up the process, and of course.
Regarding this, “how long concrete cure before driving on it?”, this is generally recommended after 7 days, freshly concrete surface is designed for 90% of its full strength after 7 days, then free to yoy may drive and park your personal vehicle. If you can drive or park heavy equipment or machinery on freshly concrete surface, it will take additional time at least 30 days.
Concrete is properly cured upto 60 days for the having more potential strength driveways can up to 50 years, in additional 60 days time concrete may consist different colours in certain areas that is discolored in certain areas, look spotty due to different amounts of water content evaporating from each section of concrete.
How long concrete cure before sealing?
Sealing process is the defined as pretty straight forward once constitution of freshly concrete driveway for provide multiple benefits like as staining protection and high gloss finish by use of some sealer product silikate concrete sealers, silane siloxane water repellent sealers.
In this regard, “how long concrete cure before sealing?”, sealers most applied under dry conditions having air temperatures should be above 50 degree Fahrenheit during sealer application and new concrete cure for at least 24 hours after, most effective concrete to cure completely recommended at least 28 days. In fact that the curing time of 28 day is standard in the concrete industry to including the its application is done properly because that is protect your concrete from weather exposure, water, staining, grease and oil stains .
Sealers provide a good quality is play a important benefits to every few years will extend its life and keep it looking good and potentially lasting longer, there are different types of concrete sealers which is designed to help protect against staining, appearance of the concrete and high gloss finish.
Also the periodic sealing will prolong the life of any concrete slab, whether that is driveway, pool deck, patio or sidewalk.
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How to seal concrete?
Regarding this, “how to seal concrete?”, there are some method of how to seal concrete as following-
1. Remove the all dirt particles like as oil, dirt, dust, greese etc.
2. To exist sealer is strip from the concrete surface
3. Open up the concrete with etching solutions and then a thin coat of sealer is applied to use a roller.
4. Wait upto first layer of sealer is dry.
5.then seconds coat of sealer layer is applied in the opposite direction to allow fully dry before to use driving or walking on concrete.
How long concrete cure fence post
Setting fence posts in concrete cure depending on the composition of concrete mix design according to recommended like as M20 consist by volume propertion of cement, sand, aggregate and water respectively 1:1.5:3 means 60 to 70 percent aggregate, sand, cement contain up 15 to 20 percent of concrete volume and the water 15 to 20 percent in which molecules of water chemically bonded within cement and harden, binding the aggregate into a solid form. Also weather conditions affect the concrete cure fense post.
In this regard, how long concrete cure fence post?”, setting fence construction in newly concrete surface can apply after 4 hours, it should be hold up a fair amount of weight without sustaining damage, newly concrete should cure for 24 to 48 hours before any forces are applied to the posts and for the concrete to be fully cured, gaining strength of 90% & cure time should more than one weak.
Concrete gains strength for longer edge within cure of concrete, due to that compressive test specimens get put into water until these concrete are ready to set with harden and bonded together water particles and cement, mix design can have a significant effect on the rate of strength gain, so when setting post for cure concrete, efficient read and follow the instructions of the manufacturer of concrete where you will be instructed to set the fence post.
How long concrete cure before drilling?
Drilling a hole in concrete is useful techniques, this process is more quickly and safely done with the help of selecting the right tools like as high quality masonry drill bit and a good hammer drill and also the set of depth and mark the drilling spot. Drill bits are good for drilling in concrete,also for drill in bricks and stone, these massonary bits with tungsten carbide tip are the strongest and projects that require drilling into concrete or any other surface, the best tool need the hammer function.
In this regard, “how long concrete cure before drilling?”, concrete cure before drilling at least 3 days, installing the anchors would be best in 7 days, this is a great deal of outward force against in concrete which is takes at least 5-7 days for concrete to cure to 60% of its strength. Concrete takes 28 days to cure is the accepted standards for concrete to reach completely cured that is successful drilled.
Drilling can cause concrete to crack, if we are not done properly and safely, so selecting tools is perfect and important factor to understand how to use these equipments.water will help to collect and remove the drilling dust ,clog the drill bit and also help to keep your bit from overheating. Drilling process is not done in wet cement due to it will flow back into itself and fill the hole.
How long concrete cure before framing?
Concrete cure before framing is two time frames 7 days and 28 days . Concrete is gain strength to be approximately 75% in 7 days like as installation of light framing and the concrete is expected to at full strength in 28 days, such as large colums or heavy equipment being set materials are use in 28 days.
Regarding this, “how long concrete cure before framing?”, concrete cure before framing is depend on the basis of construction structure such as hauched slab on grade with mesh wire and rebar reinforcement can installation framing within 24 hours, foundation wall cure before framing is takes 36 hours will be enough time, also wood stud wall framing on a concrete slab installation is 24 hours sufficient to accept fasteners and hold tightly without damage.
Concrete slab pouring is an important that you wait until it is cured at least 70% before doing framing else, according to engineers wil work framing with most two factor full strength in 28 days and 75% strength in 7 days of concrete.
Concrete cure before framing is depend upon few factor that is dermine the how long a concrete surface cure before it can start supporting weight like as framing, these some factors are amount of water in mixture, ambient temperature,type of mix that is developing a good concrete mix and intended use for the concrete.
How long concrete cure before hot tube?
Regarding this, “how long concrete cure before hot tube?”, the concrete cure before hot tube is minimum one week and the concrete to completely cure in 28 days so expert recommended 28 days before putting really heavy weight like a hot tub on it.
Hot tube requires a stable surface, wheather this is placed on a concrete slab, reinforced deck and firmly compacted soil with crushed gravel. Concrete will harden soon after pouring that is susceptible to damage from weight like as hot tube during the four weeks.