The maximum thickness of concrete floor of a cement warehouse is:
🔬 Understanding Cement Storage Requirements
Cement is a hygroscopic material, meaning it readily absorbs moisture from the atmosphere. If cement absorbs moisture, it undergoes premature hydration, forming lumps and losing its binding property and strength. The primary purpose of a cement warehouse is to protect the cement from moisture and dampness. The floor is the first line of defense against ground moisture, so its design is critical.
📝 Detailed Analysis of Floor Thickness
(d) 25 cm
This is the correct answer. Standard guidelines for cement warehouses recommend a thick, impermeable floor to prevent any moisture from seeping up from the ground. A concrete floor with a thickness of 25 cm (or 250 mm) provides a robust barrier against dampness. This thickness, combined with raising the floor level well above the surrounding ground, ensures the stored cement stays dry and effective.
(a) 10 cm, (b) 15 cm, (c) 20 cm
These are incorrect. While these thicknesses are used for various types of concrete slabs, they are generally considered insufficient for the critical task of protecting a large store of cement from ground moisture. A thinner slab is more susceptible to cracking and moisture penetration over time, which could lead to the loss of thousands of dollars worth of cement. Therefore, a more substantial thickness is specified.
📊 Key Rules for Cement Storage
| Parameter | Guideline | Reason |
|---|---|---|
| Floor Thickness | ~25 cm (250 mm) | Prevent ground moisture ingress. |
| Floor Level | ~45 cm above ground | Prevent water from entering. |
| Placement | On wooden planks | Avoid direct contact with the floor. |
| Wall Clearance | Minimum 30 cm | Allow air circulation, prevent dampness. |
| Stack Height | Max 15 bags (~2.7m) | Prevent compaction and lumps in lower bags. |
💡 Study Tips
- Think "Protection": Every rule about cement storage is designed to protect it from moisture. A thick floor is a key part of that protection.
- Visualize the Warehouse: Imagine a fortress for cement. It needs thick walls and a thick floor raised off the ground to keep the enemy (moisture) out.
- Remember the Numbers: Associate the key numbers: 25 cm floor, 45 cm plinth, 30 cm wall gap, 15 bag height.