How do weather conditions affect concrete?
Concrete is used for the vast majority of construction around the globe and is versatile enough to be poured in any weather condition. However, the quality can be affected by certain weather conditions which may impact its curing time and pouring ability.
Rainy weather
This country experiences more than its fair share of rain, yet construction continues through the showers. However, some cement can be washed away if it is not fully set, which can weaken the surface. Rainwater can also bring pollutants and contaminants into the mix as it travels.
It’s important to try and avoid pouring concrete during a rain shower, but if you do have to, try and avoid getting any rainwater in your mix which will contaminate it. You can do this by ensuring you have good drainage and push water away from your work area.
While the concrete is curing, use covers such as tarpaulin to protect it. The West of the UK is particularly prone to rainy weather, so if you’re looking for concrete Gloucester, you can get advice from several suppliers such as www.monstermixconcrete.co.uk/.
Hot weather
Higher temperatures can result in rapid hydration and therefore accelerated setting which means that you’ll have to be quick in placing, compacting and finishing it. If you don’t do this, there’s a risk of thermal shrinking and cracking, which reduces the durability and strength of the concrete
Cold weather
Lower temperatures can have an effect on the chemical reactions which happen during the curing process, so if pouring concrete in cold weather, you should ensure that the temperature is above 5°c. This is because concrete has to be kept at this temperature or above for at least 48 hours to have the desired strength of 5MPa. You should also check if the concrete mix is at the right temperature, both at the time of delivery and once it has been poured. If the temperature drops below freezing before it has reached 5MPa, water used in the mix could freeze and lead to the concrete expanding.
Leave a reply