Precipitation is evenly distributed throughout the seasons, with snow falling in the winter and rain in the other seasons. Ground frost can vary from several inches to none at all depending on where in the region you reside. Special Equipment: Sprayers to apply curing compounds; blankets for the rare late- season cold snap. Proper planning and communication are keys to a successful winter pour. Placement and Curing Practices: Cold-weather concreting practices will be dictated by the weather conditions on the day of the pour, which can range from cold weather to fair weather. Contact us and view our privacy policy, terms & conditions, and press room, Ground heaters if the ground is frozen prior to the pour, Concrete pumps to speed the placement of concrete in cold conditions, Curing blankets and non-water-based curing compounds, Proper cold-weather attire for crews pouring and finishing the concrete. If the existing concrete is structurally sound, and not heaving or settling.. My rule of thumb is this: If the new concrete is 3 inches thick or more - you don't have to bond the new concrete to the old concrete. With the high heat and oppressive humidity, placement and curing of concrete may require extreme measures. Straight concrete mixes can also be used, as they tend to set faster than hybrid mixes. The region receives an average of 40 to 90 inches of rainfall annually. You can load walls right away but you can't load them laterally like backfilling. Mix Designs: Because of the warm year-round climate, most exterior concrete mix designs have compressive strengths of 3000 psi concrete and need little in the way of additional chemical set accelerators during the winter. Eliminating fly ash and retarders from mixes is normal as the temperatures start to decrease. Most exterior concrete work takes place during the summer in this region. Curing concrete in these regions usually requires the use of solvent-based curing compounds or cure-and-seal chemicals to avoid freezing. Mix Designs: Because the ground will stay cold longer, chemical set accelerators are often used in concrete in the spring to help the concrete set quickly and uniformly. Due to exposure of the hardened concrete to freeze-thaw conditions in winter, it is prone to spalling and scaling. Climate (June - August): Hot, humid summers are the norm for much of the Northeast. Air-entrainment admixtures should be mandatory in all exterior concrete placed in this region. Mix Designs: Cold-weather concrete mix designs are typically used in these regions, but can be replaced with standard mixes, weather permitting. Precipitation ranges from 20 inches annually in the western states to 40 inches in the eastern and southern areas. While concrete can be poured at any time of year and in nearly any location, there is an ideal range of temperature in which to pour concrete, and if it's too cold or too hot outside, … Precipitation ranges from 20 inches annually in the western states to 40 inches in the eastern and southern areas. Proper water content and finishing are critical for long-term durability. This is the dry season and conditions are most favorable during this time of year for exterior concrete work. Moderate to high humidity is normal, aiding placement and curing of exterior concrete. Coastal areas will see fog in early summer, but this ends by July. The farther south you go, the rarer frost and cold weather become. Rain can become more frequent, but it is still considered part of the dry season. Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. Using hot water to increase concrete temperature is a common winter practice.Placement and Curing Practices: Cold-weather concreting practices are mandatory for all exterior concrete placed in this region during the winter. Because of the high average of sunny days and the sun's intensity at high altitudes, south-facing areas lose snow significantly faster than those on the north side or in shadowed areas. Spring storms can be severe, with the threat of tornadoes in all areas. Just remember that if your making your forms from foam you might have an issue with pressures inside the mold, 500lbs of concrete can exert a decent amount of sideways force, I was worried … When we pour footings in heavy commercial we like to get at them early in the AM after a pour, at that time you can drive a 3 1/2" nail into the green concrete so we can fasten our wall kickers directly to the concrete … Elevation dictates much of the climate in this region. Conditions tend to be milder and drier from east to west within the region. The main thing is to keep the concrete from freezing. Day time temperatures are mild and range from 50 F to 70 F. The higher elevation areas of Northern Arizona and New Mexico can see periods of cold weather, but typically they do not last for more than a week, with abundant sun shine right behind. Late spring and early fall are typically the best times to pour cement, as the weather generally is mild. Frost and freezing temperatures typically do not become a factor until November. Scheduling new exterior concrete work can be difficult, since concrete suppliers and installers are typically busy finishing as much work as possible before winter arrives. In most areas, summer can be the most demanding time of year to pour exterior concrete. Many of these will involve the pouring of concrete to start. Air entrainment may be needed in high-elevation areas. Special Equipment: Pouring exterior concrete in the high plains regions in winter typically requires no additional or special equipment. Frost and winter freezing spells can occur, but do not last long. While the high deserts encompass a much bigger geographical footprint, the coastal areas contain the major population centers. This video shows you how to pour concrete in water. Snowfall can occur at any time during the spring months, with wide temperature swings. Concrete will shrink about 6 tenths of an inch per 100 feet on average, greater if the concrete is poured with a higher water cement ratio than .35 or .4 My guess from what you say … Like them? The primary considerations include blankets for heat retention as well as the possibility of tenting in very cold conditions. Coastal areas can be milder than the inland river valleys and mountains, but not different enough to alter concrete practices. Climate (June - August): Hot days and cool nights are the norm for high plains summers. The coastal regions enjoy moderate temperatures year-round. This is actually not true, as the best possible conditions for pouring concrete come in spring when the temperature is consistently in the 50s and the skies are cloudy. Placement and Curing Practices: Reference high plains summer. Special Equipment: Sprayers to apply curing compounds and surface evaporative control agents; plastic sheeting for protection from rain. Cool winters change over to hot summers very quickly. If you are planning to leave the wood in place, use pressure-treated lumber. Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. Here’s the catch – if the existing surface is somewhat in a structurally sound shape and elevating its height to a few inches won’t be a problem, you can certainly freshen it up with a new layer of concrete. Special Equipment: Reference High Plains Winter. In colder regions, 4000-psi concrete is often specified and set accelerators and air entrainment may be used if necessary. The primary consideration is the use of blankets for heat retention. For more information on our concrete capabilities or any of our other services, call us today at our Canton office at 330-456-3415 or in Mansfield at 419-524-4778! The bigger concern is what the temperature will be over the days following the pour, did you record those. Summer temperatures rise to the upper 90s and can exceed 100 F for long periods. However, these occurrences are usually short lived. Lower-elevation river valleys in the region may see significantly less snow and milder temperatures, allowing for more favorable exterior concreting conditions. Mix Designs: When hot conditions do exist, hydration stabilizers, fly ash, and water reducers are common admixtures used in this region to extend working life without affecting performance. Fall can provide some of the best weather for exterior concrete pours. The primary considerations include chemical set accelerators to help the concrete set faster and air-entrainment admixtures to help with freeze-thaw conditions. Periodic rain is common, and can occur at any time of the day. Fortunately, there are steps you can take to effectively tackle cold weather concrete … Mix Designs: Cold-weather concrete mix designs are mandatory for all exterior concrete placed in this region during the winter. Special Equipment: Sprayers to apply curing compounds and surface evaporative control agents; plastic sheeting. The primary considerations include blankets for heat retention as well as the possibility of tenting in very cold conditions. Climate Overview: The Southwest is actually comprised of two distinct regions: the coastal plains and inland high deserts. Placement and Curing Practices: Reference both High Mountains Summer and Winter since this season can have elements of both climates. Exterior concrete is poured year-round in this region. Mix Designs: This region does not see a hard freeze, but temperatures can fluctuate around the freezing point, causing freeze-thaw cycles to occur many times in a day. Taking the temperature of the concrete when it arrives at the jobsite is important to ensure it is not too cold and prone to freezing before curing. Gulf of Mexico moisture is a constant, leading to the hot, humid summers and snowy overcast winters. Air entrainment should be mandatory in all exterior concrete placed in this region. In some areas, March and April are the heaviest snow months. Winter precipitation is typically snow, with the heaviest snow occurring later in the winter. Mix Designs: Reference high plains summer. Hydration stabilizers and water reducers are commonly used to extend the working life of the concrete without affecting performance. Climate (September - November): Moderate temperatures with little precipitation make for good concrete placing conditions. Climate (Mid October - Early April): This region experiences long winters. Climate Overview:The predominant weather is warm and humid. Proper planning and communication are keys to a successful winter pour. If pouring exterior concrete during March though May, both winter and spring conditions may exist, so plan accordingly and check the extended forecast before pouring. Climate (June - August): Warm days and cool nights are the norm for high-mountain summers. Climate (September - November): Fall provides the lowest humidity and most stable temperatures for pouring exterior concrete. In northern areas or regions with prolonged cold weather, chemical set accelerators may be used in concrete in the spring to help the concrete set quickly and uniformly. Special Equipment: Reference High Mountains Winter. With the combination of heat and wind, placement and curing of concrete in the summer can require extreme measures. The primary considerations include blankets for heat retention as well as the possibility of tenting in very cold conditions. Proper mix design, placement, and curing are crucial for long-term concrete durability. Exterior concrete pours should be planned for the morning, with rain protection mandatory after the job is complete. Cold rain can continue into May, with cold temperatures beginning in early October. High-intensity sunshine with very low humidity is the norm. ACI306R also does not state when you can begin building. This is actually not true, as the best possible conditions for pouring concrete come in spring when the temperature is consistently in the 50s and the skies are cloudy. Mix Designs: Dealing with high humidity and warm weather can require the use of admixtures to extend the set time. Climate (September - November): Fall typically experiences the most stable weather conditions of the year for pouring exterior concrete. Proper mix design, placement, and curing are crucial for long-term concrete durability. This requires the use of cold-weather concrete mix designs, with standard mixes having a minimum compressive strength of 4000 psi. These cures need to be applied as soon as possible after finishing is complete to aid in moisture retention. During dry Santa Ana wind conditions, make sure to follow proper curing practices to avoid rapid hydration and shrinkage cracking of the concrete surface. Scheduling new exterior concrete work can be difficult, since concrete suppliers and installers are typically busy finishing as much work as possible before winter arrives. Fall is the most stable time of year for installing your new concrete driveway. Special Equipment: Plastic sheeting to protect against rain. Cold weather concrete can be classified as a period of more than three days where some specific conditions occur under certain temperatures. Climate (December - March): Winters are generally mild, with average temperatures in the low to mid 40s. Mix Designs: Standard mix designs are the norm due to the moderate temperatures and high humidity. Most residential exterior concrete placement is suspended during the winter, with exterior commercial concrete placement taking place year-round. Climate (Late August - October): As with spring, this season is short and sometimes nonexistent. © 2021 RG Smith Company. Mix Designs: Standard mix designs are the norm. Curing concrete in these regions usually requires the use of solvent-based curing compounds or cure-and-seal chemicals to avoid freezing. Climate (April - May): Spring is very short in the Northeast. Climate (December - March): Winters are cool. If a concrete area is going to be large, it should be reinforced with steel mesh. Placement and Curing Practices: Hot-weather concreting practices are the norm in the summer months. In the hottest western regions, most all concrete placement takes place before 10 a.m. On many larger projects, concrete is placed at night or during the early morning hours to avoid the extreme sun and heat of the day. In most areas of this region, summer can be the most demanding time of year to pour exterior concrete. So if it’s July and you’re having visions of a freshly poured driveway, you may want to wait a couple months for concrete-pouring primetime to come around. Climate (December - February): Winters are mild. Climate (April - June): High-mountain regions typically see a short, wet spring. Climate (December - March): Winters are typically cool and damp for most of this region, with cold and snow only becoming an issue in the higher elevations of the coastal mountains. Most areas experience hot to extremely hot conditions. If you are interested in … Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. When … The more coastal and southern states have milder winters, but all areas see snow. Morning placement of concrete is also common to avoid the heat of the day and afternoon thunderstorms. The use of ice in mix water is also common to cool the concrete during transport. Climate (April - May): Spring temperatures are cool and conditions can be wet. Climate (October - November): Fall temperatures can still be quite hot. The primary considerations include chemical set accelerators to help the concrete set faster and air-entrainment admixtures to help with freeze-thaw conditions. The best time to pour concrete is when temperatures are expected to remain above 50 degrees for five to seven days, but plans can go awry with the arrival of an unexpected cold front. Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. States Included: California, Arizona, New Mexico, Nevada. You also might be able to do a concrete project during the summer, as the temperature … Prolonged periods of rain can delay spring exterior concrete projects. Climate (May - September): Hot and humid! Cold-weather concrete practices are rarely, if ever, used. Placement and Curing Practices: Mild temperatures and moderate humidity allow for relatively easy placement and curing of concrete in these regions during the winter. Exterior concrete is poured year-round with precautions.Mix Designs: Cold-weather concrete mix designs are mandatory for all exterior concrete placed in this region during the winter. There are considerable temperature variations between the moderate coastal areas and the higher inland areas, but the limiting factor in all areas are cold temperatures. Using hot water to increase concrete temperature is a common winter practice. Placement and Curing Practices: Traditional placement and curing practices are the norm, as temperatures will dictate cold- or warm-weather practices. Since the ground freezes hard, using ground heaters to thaw the ground may be necessary for winter pours. Winters are long, with heavy snowfall and ice in most areas. When hot, dry conditions exist, surface evaporative control agents should be available. Rain is unpredictable and can occur at any time of the day. Taking the temperature of the concrete when it arrives at the jobsite is important to ensure it is not too cold and prone to freezing before curing. Air-entrainment admixtures should be mandatory in all exterior concrete placed in this region. The ready-mix supplier should be consulted far in advance of the concrete pour, since some states have road restrictions limiting vehicle weights allowed on the roads, which may create a logistical issue in delivering concrete. Exterior concrete work takes place year-round in the southern areas, but is uncommon in the northern areas of this region. Mix Designs: Reference both High Mountains Summer and Winter since this season can have elements of both climates. To varying degrees, all areas have cold winters with snow, short springs, cool falls, and hot, humid summers. Cool winters with temperatures ranging from 40 F and 50 F can sometimes give way to a winter cold front that drops temperatures into the lower 20s. Forms can either be removed after pouring concrete to let dry, or be left in the concrete as permanent edging. Mix Designs: Cold-weather concrete mix designs are mandatory for all exterior concrete placed in this region during the winter. Scheduling new exterior concrete work can be difficult, since concrete suppliers and installers are typically busy finishing as much work as possible before winter arrives. Adding fly ash and set retarders into mixes is normal as the temperatures start to increase. With the humidity finally out of the air, warm days and cooler nights, it provides optimal temperature … The threat of snow and freezing temperatures is usually gone by mid-April, but rain is always a consideration. Climate (April - May): Spring temperatures are cool and conditions can be wet. After that, it's way beyond 'begun' to set. The ready-mix supplier should be consulted far in advance of the concrete pour, since some plants in high-mountain areas shut down for the winter. Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. One thing both areas have in common is abundant sunshine. Extremely hot temperatures are rare. Climate (March - April): For the coastal regions, spring ushers in warmer temperatures but is still mild and pleasant. With cold temperatures, time is a factor, so pumping concrete becomes more common. The primary considerations include chemical set accelerators to help the concrete set faster and air-entrainment admixtures to help with freeze-thaw conditions. In the hottest desert regions, most concrete placements take place before 10 a.m. On many larger projects, concrete is placed at night or during the early morning hours to avoid the extreme sun and heat of the day. Mix Designs: Standard mix designs are the norm. The eastern areas are drier, and take on more of a high-desert climate. The farther inland you travel, the warmer the temperatures get, with summer highs reaching 100 F. The larger high desert area is characterized by little rainfall and blazing-hot summer temperatures. Along with the hot weather come winds, especially in the more open spaces of the western states. Concrete … Mix Designs: Dealing with low humidity and intense sunshine can require the use of admixtures to extend the set time.   Special Equipment: Sprayers to apply curing compounds and curing blankets for the rare late snow at higher elevations. Precipitation occurs during winter storms that occur from November to February, and "monsoon" season during July and August. Planning around rain is often necessary for exterior concrete pours. Typically, after 24 hours the concrete has set enough that the rain will not harm the … Then yes it can be poured. It is true that concrete can be poured during cold weather. The wet season runs from June to October, with the dry season running through the winter into early summer. During the winter, exterior concrete work typically stops, with the exception of jobs that can afford tenting or other means of raising the ground and air temperatures above freezing. The two major weather influences in the Pacific Northwest are the Pacific Ocean and the Cascade Mountains. Air entrainment should be mandatory in all exterior concrete placed in this region. North-facing slopes and shaded areas will tend to retain snow for longer periods. However, the use of curing compounds is still recommended, especially in the wind-prone coastal areas. Long periods of overcast conditions with mist and light rain can occur all winter. With some of the highest temperatures in the country, placement and curing of concrete in the summer may require extreme measures. Plastic sheeting, surface evaporative control agents, and curing compounds should be available on all exterior pours in the spring. With professional assistance from R.G. Air-entrainment admixtures should be mandatory in all exterior concrete placed in this region. Save my name, email, and website in this browser for the next time I comment. Concrete set time at 70 degrees is approximately 5 hours, at 50 degrees it is 10 hours, at 30 degrees it’s up to 20 hours (if the concrete … Placement and Curing Practices: Hot-weather concreting practices are the norm in the summer months. Spring is typically cool and short, and summers are hot and humid. The first substantial snowfall typically arrives by the end of October, and snow is usually not gone until May or June. Early winter storms can begin to erupt in the late fall. Along with the warmer weather comes the tropical monsoon season, with almost daily afternoon downpours of rain, sometimes with heavy winds. Rain averages 15 to 20 inches per year and falls primarily in the winter months of February and March. Regions of high elevation (above 7,000 feet), Copyright 1999-2021 ConcreteNetwork.com - None of this site may be reproduced without written permission. Mix Designs: With the exception of the high deserts, this region does not see much in the way of harsh weather. Air-entrainment admixtures should be mandatory in all exterior concrete placed in this region. Plastic sheeting, surface evaporative control agents, and curing compounds should be available on all exterior pours in the spring. Curing concrete in these regions usually requires the use of solvent-based curing compounds or cure-and-seal chemicals to avoid freezing. Placement and Curing Practices: Hot-weather concreting practices become more critical as the temperatures start to increase. Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. Mix Designs: When hot conditions exist, hydration stabilizers, fly ash, and water reducers are common admixtures used to extend working life without affecting performance. Due to extensive freeze-thaw conditions, this region is prone to spalling and scaling concrete. Pumping concrete for larger pours is also common, to speed the delivery of the concrete to the jobsite in hot weather. Ground frost can vary from several inches to none at all depending on where in the region you reside. Additional travel time can affect concrete performance, especially in very cold temperatures. If pouring exterior concrete during March through May, both winter and spring conditions may exist in a 24- hour period, so plan accordingly and check the extended forecast before pouring. Proper water content and finishing are critical for long-term durability. The threat of snow and freezing temperatures is usually gone by mid-April, but rain is always a consideration. Early winter storms may begin in the late fall. Proper mix design, placement, and curing are crucial for long-term concrete durability. Typically concrete joints should be cut in less than a day, but the specific timing depends on numerous factors, including local conditions, weather and concrete … Mix Designs: Standard mix designs are the norm. Guidelines for placing concrete by region and season throughout the U.S. Placement and Curing Practices: Reference High Mountains Winter. Climate (October - November): Fall temperatures can still be quite hot, with high humidity. Climate Overview:Although they cover a large geographic area, the states that fall within this region have similar weather patterns. Temperatures are mild to cool during the summer season. The current weather conditions will dictate any special needs, which may include ground heaters if the ground is frozen prior to the pour, curing blankets, tenting of the pour area, sprayers for applying curing compounds, and cold-weather attire for crews pouring and finishing the concrete. Late afternoon thunderstorms are common, so exterior concrete pours should be planned for the morning, with rain protection mandatory after the job is complete. Precipitation is frequent, and can be heavy. The use of curing compounds and cure-and-seal chemicals is not as common due to the natural high humidity. Placement and Curing Practices: Hot-weather concreting practices are the norm in the summer months. The spring and fall provide the most comfortable conditions, but are short in duration. You Can Safely Pour a Concrete Foundation in the Winter Actually there are safe, effective ways to … Mix Designs: When hot conditions exist, hydration stabilizers, fly ash, and water reducers are common admixtures used to extend working life without affecting performance. Cold weather protection overnight becomes more important the deeper into the fall season you pour. The use of fly ash is also common to help slow set time. Occasional Atlantic storms from the south and winter arctic storms from Canada add to the humidity and constantly changing weather. Proper water content and finishing are critical for long-term durability. The use of curing compounds and cure-and-seal chemicals is commonplace for most exterior summer pours. Eliminating accelerators and adding fly ash to mixes is normal as the temperatures start to increase. We will come out and give you our expertise about different conditions and share our knowledge on how to extend the life of your concrete. Prolonged periods of rain can delay spring exterior concrete projects. Mix Designs: Reference High Mountains Winter. Special Equipment: Plastic sheeting to protect concrete from sudden rain showers; sprayers to apply curing compounds and surface evaporative control chemicals. Eliminating fly ash and retarders in mixes is normal as the temperatures start to decrease. With Standard mixes having a minimum compressive strength of 4000 psi the how late in the year can you pour concrete... Into mixes is normal as the temperatures start to increase or cure-and-seal chemicals to avoid freezing retarders during hot.. Guidelines for placing concrete by region and season throughout the season experience the first hot weather and... Summer May require extreme measures provide the most comfortable conditions, this region moisture., while the deserts remain very warm in duration be very warm: Cold-weather concrete mix Designs: Dealing low... 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