Why foam concrete are often determine sand moisture content of explanation

Why foam concrete are often determine sand moisture content of explanation
The strength of the foam concrete of water and foam concrete related a lot to do.Generally the mixing proportion of concrete, are calculated on dry sand, mixing the actual water added, must deduct sandstone itself contains water, so as to ensure the moisture content accord with the requirement of mix proportion of concrete mixture.
But the water content of sand and gravel tend to have larger along with the change of climate change, especially in the rainy season change is bigger, therefore, when construction must often measuring moisture content of sand and gravel, in order to adjust the water consumption of concrete, ensure the accuracy of the concrete mixture ratio.