Many Hyderabad houses get their foundations and frames built between February and June, ahead of the monsoon. That is sensible — there is no rain to stop work — but the same heat that dries the site dries the concrete. Good summer practice is mostly about controlling water and timing.
What Does Heat Do to Concrete?
| Effect | Why it matters |
|---|---|
| Faster setting | Less time to place, compact and finish; risk of cold joints |
| Faster surface drying | Plastic shrinkage cracks within hours |
| Temptation to add water | Lower strength and durability |
| Higher internal temperature | More thermal cracking risk, especially with OPC 53 |
| Lower long-term strength | Concrete cured hot and dry gains less strength |
How Should You Plan a Summer Pour?
- Pour early. Start at first light so placing and finishing are done before the afternoon peak. For large slabs, a well-lit night pour is an option.
- Cool the ingredients. Shade aggregate stockpiles and sprinkle them; use the coolest available water, stored in the shade.
- Wet the formwork and sub-base before placing so they do not draw water out of the concrete.
- Have everything ready. Enough labour, a vibrator and a standby, and materials on site — delays in heat cause cold joints.
- Use a plasticiser or retarder for workability and setting time, not extra water.
- Protect the surface with shade and wind breaks while finishing.
How Should You Cure in Summer?
- Start early. As soon as the surface can take it without marking — often two to three hours after finishing in summer. Cover with wet hessian or polythene until ponding begins.
- Pond slabs and keep the water standing; it evaporates quickly, so refill several times a day.
- Wrap columns and beams in wet hessian and keep it wet.
- Cure longer: at least 10 days for OPC and 14 for PPC is good practice in Hyderabad's April and May.
Plaster and Blockwork in Summer
- Dampen walls before plastering so dry masonry does not pull water from the plaster.
- Plaster in the morning and shade the work from direct afternoon sun.
- Cure plaster for at least 7 days.
- AAC walls laid in thin-bed adhesive need no water curing of joints, which helps in summer; walls laid in cement mortar do.
Protecting Materials
| Material | Summer care |
|---|---|
| Cement | Keep dry and shaded; heat in the stack is not the risk, moisture is |
| Steel | Store off the ground; light surface rust is fine |
| Sand and aggregate | Shade and sprinkle to keep the mix cooler |
| AAC blocks | Store off the ground; do not soak before laying |
| Water | Store in shade; adequate supply for curing is essential |
Protecting the Crew
Heat stress is a real risk on Hyderabad sites in summer. Plan heavy work for early morning and late afternoon, provide shade and drinking water, allow rest breaks through the hottest hours, and watch for signs of heat exhaustion.
The Short Version
Summer is a productive season for building in Hyderabad if you work with the heat: pour early, keep water out of the mix and on the surface, cure longer, and protect people. The concrete you cure well in May is the concrete that does not crack in the first monsoon.
