Our advantages:

a)  Owner of professional factories

b)  Experienced and have sophisticated craftsmanship.

c)  With strict control of every process and quality-inspected.

d)  Have big stock, prompt delivery and good fame in stone industry.

Quality Control:

We have a professional inspection team who will check the goods from block cutting,finishing, packing and loading into the container,

Thickness tolerance: +/- 0.5, +/-1mm.

Each procedure will be double-checked by 2 inspectors.

Clear product pictures will be sent by email to customers before shipment.

Scope

This process standard applies to common and high-grade fresh-made black terrazzo tile flooring projects in industrial and civil buildings.

Construction Preparation

2.1 Materials and Main Equipment

2.1.1 Cement

• White or light-colored black terrazzo tile flooring surface layer: Use white cement.
• Dark-colored black terrazzo tile flooring surface layer: Use Portland cement, ordinary Portland cement, or slag Portland cement (not less than Grade 425).
• The surface layer of the same color must use the same batch of cement.

2.1.2 Mineral Pigments

• Must be light-resistant and alkali-resistant mineral pigments.
• Acid pigments must not be used.
• The mixing amount should be 3% to 6% of the cement weight or determined through testing.
• The same color surface layer should use the same factory and batch of pigments.

2.1.3 Grain

• Should be made from hard and grindable dolomite, marble, or other rocks.
• The stone must be clean and free of debris.
• Particle size: 4-14mm, except for special requirements.

2.1.4 Grid Bar

2.1.4.1 Glass Strip

• Cut from flat ordinary glass, 3mm thick, and generally 10mm wide (depending on surface layer thickness).
• Length is determined based on block size.

2.1.4.2 Copper Strip

• 1-2mm thick copper plate cut into 10mm width (depends on surface layer thickness).
• Length determined by grid size.
• Must be straightened and leveled before use.

2.1.5 Sand

• Medium sand, sieved with an 8mm aperture.
• Mud content ≤ 3%.

2.1.6 Oxalic Acid

• Available in lumpy and powdery forms.
• Must be diluted with water before use.

2.1.7 Other Materials

• White wax
• No. 22 iron wire

2.1.8 Main Machines and Tools

• Black terrazzo tile flooring machine
• Roller (diameter: 200-250mm, length: 600-700mm, made of concrete or iron)
• Wooden trowel
• Hairbrush, iron dustpan, ruler, trolley, flat spade
• 5mm aperture sieve
• Whetstone (coarse, medium, and fine)
• Rubber water pipes, large and small buckets, brooms, wire brushes, ironware, etc.

2.2 Operating Conditions

2.2.1 Preliminary Construction Requirements

• Ceiling and wall plastering must be completed and accepted.
• Waterproof layer of the roof must be finished.

2.2.2 Site Readiness

• Door frames must be installed and protected.
• Water and electricity pipelines related to the ground must be installed in place.
• Pipe holes passing through the ground must be sealed tightly.

2.2.3 Ground Cushion Preparation

• After finishing the ground cushion, leave the required thickness for the grindstone layer (at least 3cm).

2.2.4 Stone Preparation

• Stone particles must be sieved separately and cleaned, ensuring they are free from debris.