10. What is the reason for not using sea and desert sand for construction?
1. These sands are finer and smoother.
2. Presence of Chloride in sea sands can cause corrosion of steel and iron.
3. They possess the high compressive and tensile strength.
Which of the above statement(s) is/are correct?
10. What is the reason for not using sea and desert sand for construction?
1. These sands are finer and smoother.
2. Presence of Chloride in sea sands can cause corrosion of steel and iron.
3. They possess the high compressive and tensile strength.
Which of the above statement(s) is/are correct?
The correct option is B Only 1 and 2
Desert sand grains are finer and smoother so their surface chemistry would not be able to offer sufficient number of multidirectional chemical linkages. If their grain size is too small, the slurry slip and the concrete would have poor strength. Desert sands possess an open structure, and there is little interlock between sand grains. If this sand is kept dry, these bonding bridges provide considerable bearing strength. But if the sand becomes wet, the bridges soften and when overloaded, the bridges break- and collapse.
Sea sand also tends to very fine and rounded. In sea water, chloride is present which will cause corrosion of steel and iron which ultimately leads to reducing carrying capacity of steel and iron, so that the structure built using this may not be sustainable. Both the sea and desert sand does not have high compressive strength, high tensile strength etc so it cannot be used in construction activities. In addition to this, the salt in sea sand tends to absorb moisture from atmosphere, bringing dampness
Desert sand grains are finer and smoother so their surface chemistry would not be able to offer sufficient number of multidirectional chemical linkages. If their grain size is too small, the slurry slip and the concrete would have poor strength. Desert sands possess an open structure, and there is little interlock between sand grains. If this sand is kept dry, these bonding bridges provide considerable bearing strength. But if the sand becomes wet, the bridges soften and when overloaded, the bridges break- and collapse.
Sea sand also tends to very fine and rounded. In sea water, chloride is present which will cause corrosion of steel and iron which ultimately leads to reducing carrying capacity of steel and iron, so that the structure built using this may not be sustainable. Both the sea and desert sand does not have high compressive strength, high tensile strength etc so it cannot be used in construction activities. In addition to this, the salt in sea sand tends to absorb moisture from atmosphere, bringing dampness
