Cement Block Making Machine in Israel

Cement Block Production Process
Standardized production is key to ensuring block quality. The main steps are as follows:
Raw Material Preparation and Mixing
Binder: Cement (usually P.O. 42.5 ordinary Portland cement, accounting for 8%-15% of the total raw materials);
Aggregate: Sand (fineness modulus 2.3-3.0), crushed stone/pebbles (particle size ≤10mm, used for load-bearing blocks), industrial waste (fly ash, slag powder, partially replacing cement to reduce costs and protect the environment);
Water: Clean tap water, with a water-cement ratio of 0.35-0.45 (a higher ratio reduces strength, while a lower ratio makes forming difficult).
Key: Precise mixing of ingredients, typically using an electronic weighing scale to maintain an error of ≤±1%.
Mixing
First, dry mix the aggregate and cement for 1-2 minutes (to ensure uniformity). Then, add water and wet mix for 3-5 minutes. The final mixture should be firm when held in the hand but loosen easily when dropped on the ground (avoid being too dry or too watery). Molding and Pressing
A brick block forming machine (hydraulic/vibratory pressure type) is used to pour the mixture into a mold. Vibration (frequency 2000-3000 times/minute) and pressure (pressure 15-30 MPa) are used to compact the material and form the block body.
After molding, the block body needs to be cured for 1-2 hours to prevent cracking during handling.
Curing
This is a critical step in determining the strength of the block. Two methods are commonly used:
Natural curing: The block body is placed in an environment with a temperature ≥5°C and a relative humidity ≥80%, covered with burlap or plastic film to maintain moisture, and cured for 28 days (watering is required 2-3 times daily for the first 7 days).
Steam curing: Steam is introduced into the curing kiln under controlled temperature (heating ≤ 20°C/hour, maintaining a constant temperature of 60-80°C for 6-8 hours, and cooling ≤ 20°C/hour). Design strength is achieved in 3-5 days (suitable for mass production). Finished Product Inspection and Stacking
Inspection Items: Appearance (no chipped edges, cracks), dimensional deviation (≤±2mm), compressive/flexural strength (per national standard GB/T 8239-2014, "Ordinary Concrete Small Blocks").
Stacking: Finished products must be stacked by category, with wooden blocks placed underneath to prevent moisture. Stack height should be ≤1.5m (to prevent cracking of the underlying blocks).