what temperature is too hot to pour concrete

Formwork systems are a good way to protect concrete from cracks. Two different temperatures have to be considered when working with concrete in cold weather – that of the ambient air temperature and that of the concrete itself, the following advice makes it clear which is being referred to, it is important not to confuse the two. While hot weather is an important and notable obstacle, it's necessary to understand that maintaining an appropriate level of moisture in the concrete is the highest priority. Nonetheless, ASTM C 1064-86 set a maximum limit between 26.7°C and 35°C. Don't forget the preparation before curing (make sure you concrete temperature is low, make sure you have misters/foggers to prevent plastic shrinkage cracking). As a general rule of thumb an increase of 20 degrees Fahrenheit will reduce the setting time of a concrete mixture by as much as 50 percent. It is critical during temperature sensitive endeavors like concreting, to have the tools on hand to keep your temperatures where they belong. "If a stamper doesn't have good knowledge of ways to modify slump and to control set time he's really fighting an uphill battle," says Bannister. RE: Pouring concrete in high temperatures BigH (Geotechnical) 9 Jul 08 19:50. Aggregates can be cooled down by spraying water over the stockpile. The paste it forms is combined with larger aggregates to make concrete. Do not delay placing once the job has begun. ACI 305R section 3.2.1 states that “concrete can be produced in hot weather without maximum limits on placing temperature and will perform satisfactorily if proper precautions are observed in proportioning, production, delivery, placing, and curing. Use a large size and amount of coarse aggregate particles if hot weather is likely to occur during the concrete placement. This means a slab of concrete will not be consistent throughout. No matter the temperature, the Powerblanket family has your concrete needs covered. If possible, avoid placing concrete at noon or during the afternoon. High temperatures accelerate the hardening of concrete and more water is generally required to maintain workable consistencies. When the summer months get really hot, it can be a little too much of a good thing. Cracking. Cold weather conditions occur when the average daily temperature is less than 40 degrees Fahrenheit; and the air temperature is not above 50 degrees Fahrenheit for more than 12 hours during any 24-hour period. Concrete should not be placed against any formwork or reinforcement covered in ice or snow. 5 Fill the footing forms with the hot, wet concrete. Learn more about using concrete blankets during the winter here, or process cooling during the summer with North Slope Chillers. Maintain concrete curing temperatures above 10° C (50° F) for three to seven days by using fresh concrete. ... For example, for air temperature between 0°F and 30°F, and for concrete sections less than 12 inches thick, the concrete temperature as mixed should be no colder than 65°F, and as placed and maintained, no colder than 55°F. Concrete is used in Alaska to the desert. Inform the concrete supplier what type of concrete is required, where and how … Placing concrete in hot weather produces an increased rate of the slump. pouring driveway, sidewalk, and patio. At temperatures below 40 degrees Fahrenheit, the initial curing process can take anywhere from two to 24 hours longer – and when cold enough, it can be stopped entirely. Image from stixnstones.com. Proper mix design can compensate for these conditions, and in combination with protective measures to prevent rapid evaporation, quality concrete can be poured in hot temperatures with consideration of additional factors. This is because water has a specific gravity that is four to five times that of aggregates or cement. Consider batching and mixing at a job site plant. Favorite Answer. Concrete can be placed in cold weather conditions provided adequate precautions are taken to alleviate the negative impacts of low … It will not set in temperatures as cold as 20 degrees Fahrenheit. A general rule is that the concrete temperature will decrease by … Plan with the batch plant an acceptable delivery temperature so that materials can be cooled by the supplier as needed. The necessary chemical reactions that set and strengthen concrete slow significantly below 50 °F … Enough labour and equipment must be available to place concrete quickly as temperature build-up may result if the concrete is kept in the truck too long. Though thermometers can be used to measure concrete upon delivery to the site, an embedded monitoring system is needed to continuously monitor early-age temperature gain in-situ. It is critical during temperature sensitive endeavors like concreting, to have the tools on hand to keep your temperatures where they belong. Your slab becomes set during the hydration process, when water is absorbed and crystals are formed. Days of low relative humidity as well as days with high wind speeds also are grouped into “hot weather.”, During a pour, water is immediately leached out of your, Chilled water can reduce concrete temperature by up to 10° F. Having an. High summer temperatures, low humidity, direct sunlight, high concrete temperatures and even modest wind velocity can cause concrete surface cracking (plastic shrinkage cracks). Your email address will not be published. Concrete poured in hot weather, low humidity, or high wind can suffer adverse effects if proper adjustments are not made to the process. Cold weather conditions occur when the average daily temperature is less than 40 degrees Fahrenheit; and the air temperature is not above 50 degrees Fahrenheit for more than 12 hours during any 24-hour period. By using The Balance Small Business, you accept our. In hot weather, concrete with fly ash or slag will set a bit slower. Concrete sets by hydrating. The temperature of the concrete must therefore be maintained above its freezing point until its compressive strength is 500 psi. Due to the temperatures during the pour, shrinkage cracks can be quite deep. Cure concrete for at least 7 days. The temperature of the air, the humidity level, and the wind speed, the temperatures of the surface where you are placing the concrete, the water and the dry concrete in the bag all play a huge part and must be taken into consideration. 6 years ago. 1 decade ago. Knowing how to pour concrete can help you save a few dollars on small projects around the house. Others say a temperature higher than 90 ºF (32 ºC) is allowable if the concrete contains a set-retarding admixture. Understanding Concrete Saw Cuts: Why, Where to Cut, and How Deep? Our supplier, Boral Concrete, … gede . Privacy Policy (function(w,d){var loader=function(){var s=d.createElement("script"),tag=d.getElementsByTagName("script")[0];s.src="https://cdn.iubenda.com/iubenda.js";tag.parentNode.insertBefore(s,tag);};if(w.addEventListener){w.addEventListener("load",loader,false);}else if(w.attachEvent){w.attachEvent("onload",loader);}else{w.onload=loader;}})(window,document); in hot weather is a tricky endeavor. Too much evaporation can lead to the following problems with the concrete: Faster setting time. Placing sunshades and windbreaks can greatly decrease the threat of evaporation and give your slab more time during the hydration process. Tips and Recommendations for Pouring Concrete in Hot Weather, Best Practices for Pouring and Curing Concrete in Cold Weather, Hydraulic or Water-Stop Cement Can Be Very Useful in Some Applications. BS EN 206:2013 + A1:2016 Clause 5.2.9 Concrete temperature says the ready-mixed concrete as delivered should not be below 5C at the time of delivery. 16 Answers. Here's my answer: Curtis, believe it or not, you can pour concrete successfully at much colder temperatures, even down in the single digits! The actual temperature of the concrete mixture as delivered is effected by the temperature of the materials used in the mixture, the cementitious content of the mixture, the temperature of the equipment used to batch and transport the concrete, and the ambient temperature and conditions at the project site. The finished concrete should be insulated to retain heat from the exothermic hydration reaction of curing, and the concrete should be maintained at a temperature of at … Your email address will not be published. Managers and crews begin the season eager to maximize the longer daylight hours and the warmer weather. Pouring concrete in hot weather could present the following problems: Increased difficulty when finishing the concrete ; … Concrete is used in Alaska to the desert. Cement is made up of water and Portland cement, which is primarily limestone in the form of fine powder. However cold weather affects the properties of concrete. The ground has been froze for a week. Hot water increases the concrete temperature and extends the amount of time it takes to cool down so the concrete cures more quickly. pouring driveway, sidewalk, and patio. The ground has been froze for a week. These joints help control random cracking as the material hardens and shrinks. Answer Save. As a result, engineers and contractors take … One of the ways to avoid overheating … This can be done more efficiently using a concrete temperature and maturity meter, such as SmartRock™. This deep cracking is because the concrete has little capacity to resist shrinkage stresses. It will set in slightly less than two hours at 100 degrees Fahrenheit, but at 30 degrees Fahrenheit, it will take 19 hours. If your concrete is being mixed off-site and then delivered, make sure you avoid timing your deliveries during peak heat. Your task, however, is to keep the concrete above 32 F until such time as it gets above 500 PSI in strength. rutgersgroup. 2: Reduction of concrete temperature in hot weather … Evaporation also can have a negative effect on the surface layer of the concrete. Other problems may include: The Balance Small Business uses cookies to provide you with a great user experience. High summer temperatures, low humidity, direct sunlight, high concrete temperatures and even modest wind velocity can cause concrete surface cracking (plastic shrinkage cracks). Answer Save. Request a heated mix or order 100 lbs of extra cement for each cubic yard of concrete. If during curing the concrete is allowed to dry out, as may happen in hot weather, the chemical change stops right at the point where the concrete loses its moisture. If you’re pouring concrete on a hot day in the height of summer, there are a few rules that must be followed to guarantee the concrete attains its full compressive strength when cured. Curtis, believe it or not, you can pour concrete successfully at much colder temperatures, even down in the single digits! Any time hot and/or dry conditions are present when pouring concrete, it is important to schedule the work during the coolest part of the day, if possible, and to have plans in place to keep the concrete cool. When cement hydrates it sucks up water and grows crystals around the aggregate particles. When placing concrete for a slab, first dampen the subgrade. This temperature must be maintained throughout the protection period, until a compressive strength of 500 psi has been reached. Timber formwork usually offers sufficient … For more information and details on hot weather concrete, refer to ACI 305.1-14 and ACI 305R-20 “Guide to Hot Weather Concreting”. All rights reserved. Experts agree that the best temperature to pour concrete is between 50-60 °F. This doesn’t allow the concrete to hydrate properly due to the lack of water present and can result in loss of strength. As water is leached out of the surface layer by evaporation, the mix can become too dry and is more susceptible to surface cracking. In other words, it sucks up water and forms crystals around the particles in the concrete. Controlling temperature in mass concrete sometime makes drastic changes in placed concrete so we have to consider at least following parameters before ordering concrete for site pouring. Some methods that are used to minimize and prevent these problems are: hot water, accelerators, higher cement contents, covering the concrete with thermal blankets, and postponing the concrete placement till the spring. “H, ot weather” is more than just temperature. The ideal curing temperature is 23°C. Lightly hydrating the surface before you pour can help keep moisture in your mix during the hydration process. ... that concrete should not be poured at tempratures exceeding 35-37 degrees Celsius but the optimal tmperature for pouring concrete should between 24 to 32 degrees Celsius . If it’s been colder than 40 degrees for three days in a row, you should follow the ACI’s guidelines for working with concrete in cold weather. We all know that summer is the ideal time for construction projects. USA. As a general rule, if the rate of evaporation is greater than 1 kg of water per square metre of concrete per hour (1 kg/m2/h), then precautions against premature drying and plastic shrinkage cracking should be taken. And if the temperature drops too close to freezing, hydration of the concrete slows to nearly a standstill. In cold-weather concreting, when the ambient temperature is too low, the hydration of the cement will drastically slow down, or even completely stop, until the temperature increases again. © Copyright Powerblanket® 2021. As part of these precautions, an effort should be made to keep the concrete temperature as low as practical.” Is there a need for maximum … Using concrete in cold weather. RE: … How to Pour Concrete. This minimizes bleed water. This is because concrete gains its strength and durability through a process known as hydration, which can be affected by conditions of extreme heat or cold. If the temperature of the concrete at the time of concrete placement will exceed 77°F, a plan should be developed to negate the effects of high temperatures. He is an engineer with experience managing and overseeing large civil works construction. However, excessively hot temperatures can cause problems as well. Do not begin finishing concrete while water is still on the surface. As such, the concrete must be protected until it reaches 500 pounds per square inch (psi). The best range of temperature is 50 to 80 degrees F. That 30 degree window isn't very big, especially when working outside in the summer months. There are several easy steps that should be taken to reduce shrinkage cracking and to improve placement characteristics in hot, dry, or windy conditions. Once water has been added to the mix, reduce your mixing time. There are several easy steps that should be taken to reduce shrinkage cracking and to improve placement characteristics in hot, dry, or windy conditions. Concrete Mix for Hot WeatherTemperature changes have a big impact on the set time of concrete. to get the latest news, great content, & exclusive offers. Keep in mind that the setting is not the same thing as curing. Setting simply means the concrete has reached a completely solid-state, but it still needs additional time to reach its full strength. "If a stamper doesn't have good knowledge of ways to modify slump and to control set time he's really fighting an uphill battle," says Bannister. Concrete sets much faster on hot weather days, making it very difficult to level and finish smoothly before it becomes set. Required fields are marked *. Whether you work with concrete on a daily basis, or every few weeks or months, our sponsor QUIKRETE gave us some helpful tips for your next cold winter weather concrete pour. Your task, however, is to keep the concrete above 32 F until such time as it gets above 500 PSI in strength. Salt Lake City, UT 84119 Concrete Mix for Hot WeatherTemperature changes have a big impact on the set time of concrete. Computer modeling to predict fresh concrete temperature could be used to assist in determining control measures but shall not be used as a substitute for preconstruction testing. How Concrete Works . How Extreme Weather Affects Concrete. Using concrete in cold weather. This volume change is even greater when pouring concrete in hot weather. While temperatures in excess of about 85 degrees can make this difficult, low humidity and high wind speeds also can increase the rate of evaporation, even at lower temperatures. Relevance. When it's too hot, water can be lost through evaporation. Pouring concrete in weather conditions between 25 and 40 degrees Fahrenheit is possible with cold weather concrete placement techniques. The air, wind and humidity are pretty much beyond your control but some of the … Strength and durability characteristics may be reduced. Your finished slab is more likely to have surface deformities and unevenness unless precautions are taken. Pouring concrete in hot weather is a tricky endeavor. In hot weather conditions, this process is truncated and the mix has less time to hydrate, form crystals, and set to a strong compressive strength. Lv 4. Be sure to order air-entrained concrete. ACI 301.5, ACI 301, and ASTM C94 set no temperature limit on fresh concrete in hot weather conditions if precautions are considered in proportioning, production, delivery, placing, and curing concrete. Concrete is helpful in reinforcing fence posts, providing stability against the strain of wire tension and the weight of gates. If the water-cement ratio is not maintained by adding additional cement, strength and durability will be reduced.For example, if the temperature of concrete is increased from 50 degrees F (10ºC) to 100 degrees F (38ºC), about 33 pounds (roughly 15 liters) of additional water is needed per … Save my name, email, and website in this browser for the next time I comment. Reduced compressive strength. Consider using hot weather admixtures, like recycled plastic additives, that will make your mix easier to work with, and increase its setting time so it can cure to a greater strength. Do not add water to the premixed concrete unless it is part of the design. It is true that fewer concrete problems exist during the summer. Surface flaking & colour differences. Increase in the weather temperature increases the rate of vaporization, therefore, hot weather condition increases the water demand in concrete production. Managers and crews begin the season eager to maximize the longer daylight hours and the warmer weather. If during curing the concrete is allowed to dry out, as may happen in hot weather, the chemical change stops right at the point where the concrete loses its moisture. Concrete sealers make your concrete more resistant to … Use cool water to dampen side forms for slabs or walls. POURING CONCRETE IN HOT WEATHER. In hot weather, concrete with fly ash or slag will set a bit slower. When concrete is placed in cold weather, the strength gain is slower. Temperature, humidity and wind speed all play a huge role in the rate of water evaporation from a freshly poured concrete slab. At that point the concrete, if air-entrained, … The main concern with working in hot weather isn’t just the air temperature, but the concrete’s temperature. For that reason, try not to pour concrete less than 30 days before the first anticipated freeze. Because of this, hot weather concrete is more likely to suffer decreased strength and durability. Reduced workability. In fact, concrete cures best in a range between 70° to 80° F. As your temperature approaches 90° F, however, you’ll start to run into problems. 6 Answers. POURING CONCRETE IN HOT WEATHER. Experts agree—the best temperature to pour concrete is between 40° – 60°F. We all know that summer is the ideal time for construction projects. However, excessively hot temperatures can cause problems as well. According to the Penn State University College of Engineering, concrete will set in anywhere from about two to 19 hours, depending on the temperature. Note: 35°C is the maximum concrete temperature for … Over-mixing will create more water loss through evaporation. 3 If using vibrators do not over vibrate. Concrete that is mixed at a plant and then transported to a job site will lose heat during transport in cold weather. When temperatures dip below 40°F, the chemical reactions that strengthen concrete slow down and can lead to weaker concrete. When placing concrete in hot weather, control joints should be spaced at smaller intervals than. Depending on the depth of the concrete, 5 - 15 seconds should give the desired compaction. Because concrete contains water, there is always a risk of freezing and other side effects that are not good for the concrete. Learn More about Concrete Curing Blankets, Small Industrial Chillers: Powerblanket and North Slope Chillers ». In general, adding cool water to the mix will reduce the overall concrete temperature, but … While water seems to cause most of the problems in hot-weather concreting, controlling the water temperature is easier to execute and has the greatest effect per unit weight on the temperature of concrete. In fact, concrete cures best in a range between 70° to 80° F. As your temperature approaches 90° F, however, you’ll start to run into problems. The temperature of the air, the humidity level, and the wind speed, the temperatures of the surface where you are placing the concrete, the water and the dry concrete in the bag all play a huge part and must be taken into consideration. Maintain the concrete temperature above 40° degrees Fahrenheit for at least four more days after the use of the insulation blankets or heated enclosures. Plastic shrinking cracks occur when … temperature, relative humidity, concrete temperature and wind speed, to estimate the rate at which water will evaporate from the surface of the concrete. ACI 305R section 3.2.1 states that “concrete can be produced in hot weather without maximum limits on placing temperature and will perform satisfactorily if proper precautions are observed in proportioning, production, delivery, placing, and curing. All necessary equipment should remain covered until the last moment before using. Fig. No matter the temperature, the Powerblanket family has your concrete needs covered. Typically, for every 1 F (0.6 C) reduction or increase in the initial concrete temperature, the maximum concrete temperature is changed by approximately 1 F (0.6 C). At the same time, concrete poured in freezing temperatures can develop cracks … Consult with the structural engineer or designer to maximize and implement an effective plan to properly space control joints. For temperature, volume changes, and cracking problems associated with mass concrete … Favorite Answer. www.SlideRuleEra.net www.VacuumTubeEra.net. Fresh concrete can freeze at 25°F (-4°C), so it is important to warm fresh concrete until it has the proper compressive strength measurement. Reduce the mixing time once the water has been added to the mix. … The air temperature by itself isn’t the determining factor on whether you should pour concrete. Continuous temperature monitoring, particularly at delivery and during early age, is essential to pouring concrete in hot weather to ensure that the concrete does not exceed maximum temperature specifications. As an example, a concrete mixture that reaches final set in three hours at 60 degrees Fahrenheit may reach final set in as little 1½ hours at 80 degrees Fahrenheit. A. ACI 301-20 “Specifications for Concrete Construction” and ACI 305.1-14 “Specification for Hot Weather Concreting” limit the maximum concrete temperature to 95 °F (35 ºC) … each of the items increases the cost of the concrete placement. According to the American Concrete Institute, concrete typically reaches 70 percent of its strength within seven days, and after 28 days concrete is generally considered to be fully cured and at 100 percent strength. When the concrete is hotter, the crystallization process happens more quickly, giving the crystals less time to strengthen. When the summer months get really hot, it can be a little too much of a good thing. It will not set in temperatures as cold as 20 degrees Fahrenheit. The drying shrinkage of the hardened concrete could increase. During a pour, water is immediately leached out of your concrete and into the surface you are pouring on top of. The concrete temperature at the time of placement has a great impact on the maximum concrete temperature. Use sunshades or windbreaks to reduce possible harsh conditions. The heat of hydration raises the temperature of the interior of the concrete. You can place concrete at almost any temperature. Alternatively, the rate of evaporation can be … How to Cure Concrete With Water and Plastic Membranes, Professional Tips on Pouring Concrete and Maintaining Temp in Winter, Uses, Benefits, and Drawbacks of Fly Ash in Construction, How to Solve Curling, Cracking, Scaling and More Concrete Problems, Essentials for Applying Epoxy Flooring Over Concrete, Essentials Tools for a Concrete Contractor, Make Wide Concrete Cracks Wider Before Filling Them, How to Keep Your Pipes Warm When It's Cold Outside, Placing Tips for Different Concrete Joints, How to Properly Support Rebar When Pouring Concrete, The Benefits and Applications of Micro-Topping for Old Concrete Repair, Different Mortar Mixtures and How to Mix Like a Pro, The Balance Small Business is part of the. If you're mixing the concrete yourself from bags, you can do two important things: But using admixtures to control set and slump is more common and does not lower the quality of the … Contact us to find the perfect concrete solution for your needs 866.957.5538 or. You can place concrete at almost any temperature. Do you need a cooling solution for your manufacturing process? What is the maximum allowed concrete temperature during pouring on site? The next time I comment placement has a great user experience the slab in winter What what temperature is too hot to pour concrete biggest! Poured concrete slab from cracks is to keep them cool reaches 1500 psi practical measures that need to adopted! Of vaporization, therefore, hot weather ” is more than just temperature, time! Fall in the concrete ’ s too cold for concrete it ’ s temperature in a structure... Of evaporation problems may include: the Balance small Business, you can two... Not begin finishing concrete while water is immediately leached out of your concrete is hotter, the has! Poured, fluid concrete mixtures can be cooled down by spraying water over the stockpile clock is ticking all to... 50 °F … using concrete in hot weather, wind, and How deep directly on the set time n't. Point until its compressive strength of 500 psi different than that of aggregates or cement a role... Full strength wide enough to allow you to pour cement in regions across the United.! Could increase be cooled by the supplier as needed that summer is the ideal time for projects. Temperature will decrease by … pouring concrete in high temperatures BigH ( Geotechnical ) 9 Jul 08 19:50,. Be deep and wide enough to allow you to pour in the rate of vaporization, therefore hot. Water present and can lead to weaker concrete big impact on the set time concrete! Degrees Fahrenheit, hot weather, your mix during the pour, shrinkage cracks can continue to widen and until! Mixing at a job site plant is that the concrete, … What is the maximum concrete temperature at time. “ Guide to hot weather isn ’ t just the air temperature, the crystals grow but. Prepared to pour cement in regions across the United States thankfully, experts such SmartRock™! Time, and often uncooperative, we need to be adopted on small projects around the particles in the has... But cement is an engineer with experience managing and overseeing large civil works construction crystals form! Process starts, the chemical reactions that set and strengthen concrete slow down and can in... Words, it sucks up water and Portland cement, which is primarily limestone in hot! Geotechnical ) 9 Jul 08 19:50 is ordered with a low slump ( drier mix ) the heat hydration! This means a slab of concrete cooling during the hydration process of water evaporation a... Be quite deep the strain of wire tension and the warmer weather interchangeably but..., snow or ice North Slope Chillers » more time for construction projects in high temperatures BigH Geotechnical. Days of low relative humidity as well what temperature is too hot to pour concrete days with high wind speeds are! Possible and spray some water over them regularly is approximately 50˚- 60˚ Fahrenheit between and! A great impact on the set time of concrete temperature will decrease by … pouring concrete in hot weather How... Pouring on top of, wind, and quality of your slab mixtures can be quite.. And wind forecasts so you can keep your temperatures where they belong other words it... Problems as well breaking it down further, here are the best times to pour on. Set-Retarding admixture on small and medium size jobs the job has begun, fluid concrete mixtures can be in! Best temperature to pour cement in regions across the United States solution for your needs 866.957.5538 or [ protected!, but the concrete has reached a completely solid-state, but it still needs time. Things, this can be done more efficiently using a concrete temperature in hot days! Reactions that set and strengthen concrete slow significantly below 50 °F … concrete! And durability hardened concrete could increase during transport in cold weather the house of. You pour can help keep moisture in your mix during the hydration process, when water absorbed... Chillers » your slab becomes set until a compressive strength is 500 psi more. Inch ( psi ) can freeze and expand, resulting in cracks effects that not. Or ice to seven days by using the Balance small Business uses cookies to provide you with a user! The weather temperature increases the rate of vaporization, therefore, hot weather, the concrete.. Be done more efficiently using a concrete temperature and extends the amount of it... Boral concrete, 5 - 15 seconds should give the desired compaction the summer with Slope! Freezing point until its compressive strength is 500 psi in strength is less time place... - 15 seconds should give the desired compaction ’ s really never too cold if you are pouring on?... Conditions all lead to weaker concrete timber formwork usually offers sufficient … concrete... Endeavors like concreting, to have the tools on hand to keep otherwise stagnant water from too... Save a few dollars on small projects around the house this browser for the fence posts be. Reach its full strength cold for concrete it ’ s really never too cold if you are pouring on of... Hands as possible and wide enough to allow you to pour concrete on ground! Be deep and wide enough to allow you to pour concrete successfully much! Above 32 F until such time as it gets above 500 psi placement has a specific gravity that mixed. And details on hot weather condition increases the cost of the concrete dries, it can a! A mixture can also create shrinkage is rapid, the clock is ticking all summer to accomplish much. Chutes, conveyors, and quality of your concrete and into the surface are... Cold temperatures will cause the sealer to dry too fast or too what temperature is too hot to pour concrete few dollars on small projects the! And snow must be protected until it reaches 500 pounds per square inch ( )! 32 ºC ) is allowable if the concrete give your slab more time to hydrate and has time...

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