Question 1

What is the setting time for RAK White Cement?

Accepted Answer

The initial setting time for RAK White Cement ranges from 110 to 130 minutes, which exceeds the minimum requirement of 60 minutes as per SANS standards. This allows for adequate working time during application.

Question 2

Are there any safety precautions during handling?

Accepted Answer

Avoid direct contact with skin or eyes as moist cement can cause irritation. Use protective gear while handling and store it out of reach of children.

Question 3

Is this cement environmentally friendly?

Accepted Answer

Yes, Rak White Cement is produced using eco-conscious practices. It has low alkali content and less than 2 ppm of water-soluble chromium (Cr6+), adhering to environmental safety standards.

Question 4

How should this cement be stored?

Accepted Answer

It must be stored in a dry, sealed environment away from moisture to maintain quality. Bags should be placed on plastic-coated pallets and used within six months of packaging.

Question 5

What are its ideal applications?

Accepted Answer

Rak White Cement is ideal for plastering, tiling, decorative concrete works, luxury home finishes, sculptures, and architectural projects requiring a pristine white finish.

Question 6

What are the technical properties of this cement?

Accepted Answer

The cement has a Blaine fineness of 395 ± 20 m²/kg, a setting time of 100 ± 30 minutes, compressive strength of 38 MPa at 2 days and 74 MPa at 28 days, and a brightness level of 87 ± 2%.

Question 7

What are the packaging specifications?

Accepted Answer

The cement is packaged in durable HDPE sack bags with a size of 50kg, ensuring superior protection and accurate dosage for both small and large-scale projects.

Question 8

What are the key features of this cement?

Accepted Answer

Key features include high setting strength, fast hardening, excellent bonding with masonry, low water absorption, good crack and heat resistance, and a smooth, bright finish for aesthetic appeal.

Question 9

What is the grade and type of Rak (CEM 1) White Cement?

Accepted Answer

Rak (CEM 1) White Cement is a Grade 1, ASTM C-150 Type I white Portland cement, compliant with EN 197-1 standards. It offers a compressive strength of 52.5N, making it suitable for general-purpose and decorative construction applications.

Question 10

Is RAK White Cement environmentally friendly?

Accepted Answer

While RAK White Cement's manufacturing process requires higher energy consumption compared to grey cement, it can be blended with supplementary materials like fly ash or GGBS to enhance sustainability without compromising quality.

Question 11

What is the fineness of RAK White Cement?

Accepted Answer

RAK White Cement has a fineness of 4060 cm²/g according to Blaine's method, which ensures high performance in terms of strength and workability in concrete mixes.

Question 12

What are the chemical properties of RAK White Cement?

Accepted Answer

The chemical composition includes CaO (67.5%), SiO2 (23.34%), Al2O3 (5.63%), and Fe2O3 (0.57%). The low iron content contributes to its high whiteness, which is measured at 91.2% on the Hunter scale.

Question 13

How does RAK White Cement compare to other white types of cement?

Accepted Answer

RAK White Cement is formulated to achieve higher early and late-age strength compared to many other white cements. Its consistent quality and performance make it a preferred choice for both ready-mix and precast producers.

Question 14

What are the compressive strength values for RAK White Cement?

Accepted Answer

The compressive strength of RAK White Cement is impressive, achieving a minimum of 35-38 MPa at 2 days and 65-69 MPa at 28 days. This performance exceeds the requirements set by SANS 50197-1 for CEM I 52.5R cement.

Question 15

What are the typical applications of RAK White Cement?

Accepted Answer

RAK White Cement is ideal for a variety of applications, including architectural finishes, coloured mortars and plasters, decorative pavements, and precast concrete products. Its whiteness makes it particularly suitable for projects where visual appeal is essential.

Rak White Cement, CEM I, 50kg, High Whiteness

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