jennshriner
04.06.2021 10:55:49
Cold Weather Concreting Imagine arriving at the job to find a fresh layer of ice and snow on your pour. [links]
See full version: Pouring Concrete in Cold Weather: How Cold is Too Cold
Cold Weather Concreting Imagine arriving at the job to find a fresh layer of ice and snow on your pour. [links]
Before embarking on a cold weather concrete project, it’s important to determine any special strength requirements or considerations. This will help as you schedule your pouring and determine which strategies you will use to keep your surroundings and materials warm. The predominant challenge you will face during a winter concrete project is ensuring that the concrete sets before it is exposed to freezing temperatures. You might take the following suggestions into consideration as you plan your upcoming project: more
After implementing the above suggestions, It’s important to consider how you will keep concrete at the correct temperature during the curing process. Concrete must maintain a temperature above 50 °F for approximately 48 hours for the correct chemical reactions to take place. Two popular options used during cold weather concrete curing are heated enclosures and insulated blankets. If using an enclosure, ensure that the structure is both wind and waterproof. Additionally, ensure that there is proper ventilation for the space heater. Heaters cause an increase in carbon dioxide that could cause carbonation in the surface of the concrete. more
Electric concrete blankets versus insulated blankets. Which one is best and why is it Powerblanket? Not All Concrete Insulated Blankets. [links]
Experts agree that the best temperature to pour concrete is between 50-60 °F . The necessary chemical reactions that set and strengthen concrete slow significantly below 50 °F and are almost non-existent below 40 °F . Even when daytime temperatures are within the satisfactory range, winter concrete setting creates risks that could result in weak, inadequate concrete. If nighttime temperatures are below freezing, the water in the concrete will freeze and expand, causing cracks. Additionally, if temperatures reach below 40 °F (but not freezing) during set time, concrete will take much longer to reach required strength. However, if the correct measures are taken, concrete can still be successfully placed during even the coldest months of the year. here
Setting fence posts so that they're plumb and evenly spaced is part of the challenge. But surprisingly, even digging holes and filling them with concrete is fraught with difficulties. here
The problem begins with the shape the holes normally take. The top of the average hole that you dig is bound to be wider than the bottom since you have easier access to the top portion. The result is a V-shaped hole. Novices anticipate no problem in setting fence posts in such holes, then filling the holes up with concrete. But when you fill those V-shaped holes with concrete, you end up with V-shaped hunks of concrete. And in areas subject to frost heaves, this can be an invitation to trouble down the road.
Anyone who has ever tried setting fence posts in the ground properly can appreciate the challenge involved. Take a closer look at how to do the job properly. [links]
What's the big deal about setting fence posts? It sounds easy enough.
The trouble begins when frost starts to heave your concrete upward, using the tops of those V-shaped concrete footings to grip them (since the tops form a lip). Dirt then slips in beneath the concrete. Your fencing is raised as a result. The process is then repeated next winter, raising your fencing a bit further. And so on. Eventually, your concrete footings will be significantly elevated beyond where they should be, resulting in instability. Of course, such movement will never occur evenly along the whole course of your fencing, resulting in yet another problem: your fencing will no longer be level.
Re: Concrete pouring for fence on cold conditions
Just the corner posts need to be braced and any post that has a gate hanging from it. After that just make sure everything else is level and take into account any low or high spots for eye appeal.
Re: Concrete pouring for fence on cold conditions
Re: Concrete pouring for fence on cold conditions [links]
Re: Concrete pouring for fence on cold conditions
Re: Concrete pouring for fence on cold conditions
Don't know why a few of you guys say concrete cures in 3-5 days. Full cure on a portland based concrete takes 28 days for a full cure. If you want to set the posts quickly Buy Ace in the hole or Post Set. They are quick setting mixes. http://www.packagepavement.com/setting_post_qk.html
PS post? Here in so cal. I've dug out rotted posts from the concrete they were set in and placed PT (pressure treated) posts back in the same empty space. Rotted posts were redwood. You know where the saying "termites don't eat redwood" came from. Redwood salesmen. PT wood is said to be good for 50+ years, but that only covers the treated parts. Cut a treated 4x4 and look at the end. You'll see the center didn't treated. Rot and termites will devour the center. Want to hang a gate on a potential shell? Just saying [links]