A Complete Guide to Mixing Concrete on Site

Concrete is the backbone of most construction projects. Yet improper mixing remains one of the most common causes of structural failure.

The Golden Ratio

For general work: 1:2:4 (cement:sand:aggregate). For foundations and columns: 1:1.5:3.

Water is Critical

Keep the water-cement ratio between 0.45 and 0.60. If it flows off your shovel easily, there's too much water.

Mixing Tips

• Mix dry ingredients first, then add water gradually
• Use clean, uncontaminated water only
• Mix for at least 2 minutes for uniformity
• Pour and compact within 30 minutes of mixing

Never add water to concrete that has started to set. Keep concrete moist for 7 days after pouring to cure properly.