Ash calcium powder, also known as calcium hydroxide powder or quicklime powder, is a fine powdered inorganic compound, the main component of which is calcium hydroxide (Ca(OH)2), usually white or off-white. Ash calcium powder has excellent alkalinity, can be used to neutralize acidic substances, and can also be used as a disinfection, antiseptic and desiccant. In the field of building materials, lime calcium powder is often used as a raw material for adhesives, coatings, fillers, moisture-proof agents and other materials.
Detection performance
| performance | Detection method |
|---|---|
| Exterior | visual inspection |
| color | color comparison |
| Particle size distribution | Laser particle size analysis |
| brightness | Gloss meter |
| Ash content | Ash analyzer |
| Active calcium content | Acid-base titration |
| moisture content | drying method |
| specific surface area | Specific Surface Area Meter |
| pH value | pH meter |
| Oil absorption | air buoyancy method |
| density | Density meter |
| proportion | weighing method |
| activity | Hardening Time Tester |
Detection method
The following is the detection method for the common properties of ash calcium powder:
Appearance: Visually observe the particle shape, color and other characteristics of the ash calcium powder.
Color: Use color comparator or color difference meter and other instruments to measure the color of gray calcium powder based on international standard Color Chart or specific color index.
Particle size distribution: Use a laser particle size analyzer to measure the particle size distribution of ash calcium powder through the relationship between the intensity of scattered light and the particle size.
Brightness: Use a gloss meter to measure the intensity of light reflected on the surface of ash calcium powder, so as to obtain its brightness value.
Ash content: Use an ash analyzer to heat the ash calcium powder sample to a certain temperature to measure the mass of solid inorganic components in it.
Active calcium content: determine the percentage of active calcium content in ash calcium powder by acid-base titration method.
Moisture content: use the drying method to heat the ash calcium powder sample to a certain temperature to determine the moisture content in it.
Specific surface area: use a specific surface area meter to calculate the specific surface area by measuring the adsorption and desorption process of the ash calcium powder sample.
pH value: use methods such as pH meter or acid-base indicator to measure the pH value in the ash calcium powder water immersion solution.
Oil absorption: use the air buoyancy method to measure the adsorption capacity of ash calcium powder to oil.
Density and specific gravity: measure the density and specific gravity of ash calcium powder by means of density meter or weighing method.
Activity degree: Use the hardening time Tester to judge the activity degree by observing the setting time after the ash calcium powder is mixed with water.
