The number of concrete blocks one bag of 50kg cement can make depends on various factors such as the size and type of blocks being produced, the mix ratio of the concrete, and the wastage during production. On average, a bag of 50kg cement can typically produce around 16 standard-sized 8″ concrete blocks (8-inch by 8-inch by 16-inch) when using a standard 1:6 mix ratio.
Concrete blocks are available in standard block sizes of 4″, 5″, 6″, 8″ and 9″. The nominal dimensions of a 4″ block are approximately 400mm x 200mm x 100mm, a 5″ block is approximately 400mm x 200mm x 125mm, a 6″ block is approximately 400mm x 200mm x 150mm, an 8 inch block approximately 400mm x 200mm x 200mm and a 9 inch block approximately 400mm x 200mm x 225mm.
To calculate the number of concrete blocks made from a 50kg bag of cement, first find the amount of mortar produced by mixing 1 bag of cement with sand and then divide this by the volume of one concrete block. The result is the number of concrete blocks produced per 50kg bag of cement.
A 50kg bag of cement yields volume about 0.0347 m3, since, 1m3 of cement weighs about 1,440 kg, so volume of one 50 kg bag of cement = 50/1440 = 0.0347 m3. The mix ratio for laying concrete blocks is typically 1:6, which means one part cement mix to six parts of sand.
Therefore, 1 part of cement (one 50 kg bag of cement, or 0.0347 m3 of cement) mixed with 6 parts of sand (or 0.2083 m3 of sand, or 334 kg of sand. So, total amount of mortar per bag cement = 0.0347 m3 of cement + 0.2083 m3 of sand = 0.243 m3, which means that mixing 1 part of cement (a 50 kg bag of cement) with 6 parts of sand creates a volume of 0.243 m3 of mortar.
The volume of a 4 inch concrete block is about 0.4m x 0.2m x 0.1m = 0.008 m3, the volume of a 5 inch concrete block is about 0.4m x 0.2m x 0.125m = 0.01 m3, the volume of a 6 inch concrete block is about 0.4m x 0.2m x 0.15m = 0.012 m3, the volume of a 8 inch concrete block is about 0.4m x 0.2m x 0.2m = 0.016 m3, and the volume of a 9 inch concrete block is about 0.4m x 0.2m x 0.225m = 0.018 m3.
Here’s are general guidelines how many blocks will one bag of 50kg cement make?
- Typically, a 50kg bag of cement can make about 20 standard size 6 inch (400mm x 200mm x 150mm) concrete blocks. Number of 6″ blocks per 50kg bag of cement = 0.243/0.012 = approx. 20 blocks
- Typically, a 50kg bag of cement can make about 30 standard size 4 inch (400mm x 200mm x 100mm) concrete blocks. Number of 4″ blocks per 50kg bag of cement = 0.243/0.008 = approx. 30 blocks
- Typically, a 50kg bag of cement can make about 25 standard size 5 inch (400mm x 200mm x 125mm) concrete blocks. Number of 5″ blocks per 50kg bag of cement = 0.243/0.01 = approx. 25 blocks
- Typically, a 50kg bag of cement can make about 16 standard size 8 inch (400mm x 200mm x 200mm) concrete blocks. Number of 8″ blocks per 50kg bag of cement = 0.243/0.016 = approx. 16 blocks
- Typically, a 50kg bag of cement can make about 14 standard size 9 inch (400mm x 200mm x 225mm) concrete blocks. Number of 9″ blocks per 50kg bag of cement = 0.243/0.018 = approx. 14 blocks
The amount of concrete blocks that can be made with a 50kg bag of cement depends on several factors. However, in general, a 50kg bag of cement can yield approximately 16 8″ blocks, 20 6″ blocks, 30 4″ blocks, 25 5″ blocks or 14 9″ blocks.
Conclusions:
The number of concrete blocks one bag of 50kg cement can make depends on various factors. However, in general, a 50kg bag of cement can make about 16 8″ blocks, 20 6″ blocks, 30 4″ blocks, 25 5″ blocks or 14 9″ blocks.