Things to consider when pouring concrete in monsoon
The monsoon season in India usually begins in June and can last till the end of September. During this time, undertaking construction activities can be challenging. Due to the damp weather and increased moisture in the air, even high-performance concrete can have a hard time curing. Heavy rainfall can leave patch marks and pores if the concrete is wet and alter its surface appearance. Moreover, inclement conditions, for days at a stretch, can slow down the curing process and weaken the internal bonds between concrete particles, thereby decreasing the overall strength of the structure.
Here are 5 things that you should consider when pouring concrete in the monsoons:
1. Set up a good drainage system
Weather is uncertain; it’s not always possible to escape the rains. So it’s better to take the necessary precautions well in advance, like setting up a good drainage system. This is because rainwater can bring with it different types of contaminants that can compromise the strength of the concrete. Hence, it is important to keep trenches, foundations, and slabs from clogging. Double Bull Cement, one of the leading cement companies in India, produces the best cement for slab and foundation in the country.
While making your concrete batch during the rainy season, use hydrophilic crystalline admixtures. These admixtures, when exposed to water and cement, form calcium silicate crystals. The crystals block pores and micro-cracks in the concrete, thus preventing water from seeping in.
3. Don’t pour
concrete during heavy rains
It is not advisable to pour concrete when the weather is wet or it can delay the process of curing. Fresh concrete requires around 12 hours to begin the curing process. Check the weather forecast a day before you begin your construction activity and keep a lookout for rain predictions. In addition to this, also avoid pouring concrete if the winds are strong, as they can cause bleeding and affect the evaporation rate of the concrete.
4. Use plastic
sheeting to protect concrete
Always keep plastic tarpaulins and other waterproof covers handy during the monsoons. After fresh concrete is poured, cover it with protective sheets to shield it from rainfall. Waterproof canvasses can also be used to cover aggregates and protect them from excess moisture intrusion.
5. Beware of extra water due to rains
Rains can make the sand and crushed stone particles in your aggregate wet, thereby increasing the water content in it. To compensate for the extra water, always add less water when making a batch of concrete. Moreover, it is also important to store cement in a dry place so that it doesn’t attract moisture. But, as a note of caution, never spread dry cement on the wet surface to soak up excess moisture: it will create a poor-quality surface.