**Characteristics and Detection of Expansion Agent** The expansion agent is a white, non-toxic powder that expands safely under pressure without producing toxic gases or vibrations. It can withstand pressures up to 3,000 tons per square meter. This makes it ideal for controlled demolition and breaking of hard materials like concrete, stone, and rock. **Scope of Application** This product is widely used in various construction and excavation projects, including mining operations, foundation work, trenching, tunneling, underground engineering, bridge construction, sculpture design, dock development, and reinforced concrete demolition. **How to Use the Expansion Agent** When using the expansion agent, the hole spacing should be carefully planned based on the material being cracked—typically between 15 to 30 cm. The powder should be mixed with water at a ratio of 30-35%, stirred thoroughly, and immediately poured into the drilled holes without sealing. Cracks usually appear within 4 to 7 hours. If no cracking occurs after 20 hours, it may indicate that the hole spacing was too wide. In such cases, additional cracks should be created along the drilling line and filled with the expansion agent. **Important Notes** 1. The expansion agent comes in different models tailored for specific engineering conditions and seasonal temperatures. Users should choose the right type according to their project requirements. The factory is always available to provide guidance. 2. In hot weather, it’s recommended to mix the agent with cold water (around 4°C) to slow down the expansion process and prevent unwanted spraying. 3. Always wear safety goggles during installation to protect your eyes from potential splashes. If the agent gets into the eyes, rinse them immediately with water and vinegar. **Testing the Expansion Agent** To determine the setting time, the amount of reference cement and expansion agent must be calculated based on the dosage. Typically, the manufacturer recommends a dosage rate, which refers to the internal addition of the agent as part of the cementitious material. For example, if the dosage is 10%, then: - X / 500 = 10% → X = 50g - So, the expansion agent should be 50g, and the reference cement would be 500 - 50 = 450g. The water content is determined using the standard consistency test method for cement. The test rod should freely sink into the slurry until it is 1 mm away from the bottom of the 6 mm soil. This process should be repeated several times to ensure accuracy. For compressive strength testing, use specimens measuring 40x40x160 mm, with six samples tested at both 7 days and 28 days. After flexural testing, the broken pieces are used for compression tests. All parameters—setting time, compressive strength, and expansion ratio—are measured and recorded to ensure proper performance. Whether you're working on large-scale infrastructure or small-scale demolition, our expansion agent offers a safe, efficient, and environmentally friendly solution. Visit our website at [http://example.com](http://example.com) to learn more about our products and services.
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