Product Profile

Solid Block (150x230x300)

Dimension: The solid block has dimensions of 300 mm (length) x 230 mm (width) x 150 mm (height). This standard size makes it suitable for a variety of construction purposes.

Average Water Absorption: The block has an average water absorption rate of 11.02%. This indicates the percentage of water the block can absorb relative to its dry weight. Lower water absorption rates are generally preferable as they indicate better durability and resistance to weathering.

Average Density: The block has an average density of 1734 kg/m³. Density is a measure of mass per unit volume. Higher density blocks typically offer better strength and durability.

Average Compressive Strength: The block has an average compressive strength of 9.42 N/mm². Compressive strength measures the block's ability to withstand axial loads. Higher compressive strength indicates a stronger and more durable block.

Solid Block (150x200x300)

Dimension: The solid block has dimensions of 300 mm (length) x 200 mm (width) x 150 mm (height). This standard size makes it suitable for a variety of construction purposes.

Average Water Absorption: The block has an average water absorption rate of 11.27%. This indicates the percentage of water the block can absorb relative to its dry weight. Lower water absorption rates are generally preferable as they indicate better durability and resistance to weathering.

Average Density: The block has an average density of 1722 kg/m³. Density is a measure of mass per unit volume. Higher density blocks typically offer better strength and durability.

Average Compressive Strength: The block has an average compressive strength of 7.56 N/mm². Compressive strength measures the block's ability to withstand axial loads. Higher compressive strength indicates a stronger and more durable block.

Solid Block (150x200x300)

Dimension: The solid block has dimensions of 300 mm (length) x 200 mm (width) x 100 mm (height). This standard size makes it suitable for a variety of construction purposes.

Average Water Absorption: The block has an average water absorption rate of 10.86%. This indicates the percentage of water the block can absorb relative to its dry weight. Lower water absorption rates are generally preferable as they indicate better durability and resistance to weathering.

Average Density: The block has an average density of 1785 kg/m³. Density is a measure of mass per unit volume. Higher density blocks typically offer better strength and durability.

Average Compressive Strength: The block has an average compressive strength of 12.89 N/mm². Compressive strength measures the block's ability to withstand axial loads. Higher compressive strength indicates a stronger and more durable block.

About Concrete Block

Concrete blocks, also known as concrete masonry units (CMUs), are precast building materials primarily used in construction. They are manufactured by mixing cement, aggregate (usually sand and gravel), and water, and then curing the mixture in molds to form solid or hollow blocks.

Process

• Cement: 1 part

• Fly Ash: 0.25 parts

• Crush Sand: 5.65 parts

• Aggregate: 4.72 parts

• Water: 0.52 parts

Mixing and Curing Process:

1. Weigh and Mix Ingredients:

   • Accurately weigh the cement, fly ash, crush sand, and aggregate.

   • Mix the dry ingredients thoroughly to ensure uniform distribution.

2. Add Water:

   • Gradually add water while continuously mixing to achieve a homogeneous mix.

   • The water should be added in portions to maintain the desired consistency and workability.

3. Mold the Blocks:

   • Pour the concrete mixture into molds and compact it to remove air voids.

   • Ensure the mixture is evenly distributed in the molds to achieve uniform blocks.

4. Curing the Blocks:

   • After demolding (usually after 24 hours), cure the blocks by keeping them moist.

   • Cure the blocks for at least 7 days to achieve the desired compressive strength.

Additional Considerations:

• Quality Control:

  • Regularly test the compressive strength of the blocks to ensure they meet the required strength (>5.6 MPa).

  • Adjust the mix design as necessary based on the test results and local conditions.

• Environmental Factors:

  • Protect the blocks from extreme weather conditions during the curing process to avoid cracks and other defects.

This mix design and process should help in producing high-quality concrete blocks that meet the required strength criteria.

Solid Block Mix Ratio for Concrete Block with Required Strength >5.6 MPa

To achieve the required compressive strength of more than 5.6 MPa, the following mix design can be used for 1 cubic meter (1 m³) of concrete block:

Material Requirements:

• Cement: 176 kg

• Fly Ash: 46 kg

• Crush Sand: 1166 kg

• Aggregate: 1044 kg

• Water: 116 kg (with a water-cement ratio of 0.52)

Mix Ratio:

To convert the weight of materials into a mix ratio, we will use the total weights provided. The mix ratio is a simplified way of expressing the proportions of the components. Here is the step-by-step calculation:

1. Sum of Cement and Fly Ash:

   • Total binder (Cement + Fly Ash) = 176 kg + 46 kg = 222 kg

2. Proportion Calculation:

   • Cement: 176/222 ≈ 0.793

   • Fly Ash: 46/222 ≈ 0.207

   • Crush Sand: 1166/222 ≈ 5.257

   • Aggregate: 1044/222 ≈ 4.703

3. Water-Cement Ratio:

   • The water-cement ratio is given as 0.52.

Simplified Mix Ratio:

• Cement: 1 part

• Fly Ash: 0.26 parts

• Crush Sand: 5.65 parts

• Aggregate: 4.72 parts

• Water: 0.52 parts (relative to the binder)

Example Mix for Practical Use:

For practical purposes, the simplified mix ratio can be adjusted slightly to make it easier to measure on-site: