XJB-2 Fine aggregate methylene blue test device Calculation The fine aggregate methylene blue value (MBV) is calculated using formula T0349-2, and rounded to the nearest 0.1. MBV = (T0349-2) Where: MBV – methylene blue value (g/kg), indicating the amount of methylene blue consumed per kilogram of 0–2.36 mm sample; M – sample mass (g); V – total volume (mL) of methylene blue solution added. Note: The factor 10 in the formula is used to convert the volume of methylene blue solution consumed per kg of sample into mass. 2. Evaluation of rapid methylene blue test results: If a distinct color halo appears around the precipitate, the test is considered acceptable. If no clear halo is observed, the test is deemedä¸åˆæ ¼ (unqualified). 3. The methylene blue value (MBVF) for the fraction less than 0.15 mm or mineral powder is calculated using formula T0349-3, accurate to 0.1. MBVF = (T0349-3) Where: MBVF – methylene blue value (g/kg), representing the grams of methylene blue consumed per kilogram of 0–0.15 mm sample or mineral powder; M1 – sample mass (g); V1 – total volume (mL) of methylene blue solution added. 4. The calculation and evaluation of the clay content or stone powder content in fine aggregate are carried out according to the method specified in T 0333. This equipment is widely used in construction and material testing laboratories to ensure the quality of aggregates. Proper calibration and regular maintenance of the testing device are essential to maintain accuracy and reliability in results. It is recommended to follow all safety guidelines and standard operating procedures during the testing process to avoid errors and ensure consistency in measurements. Solar system lead acid battery storage,Uninterrupted Power Supply lead acid battery price,Deep cycle lead acid battery for UPS Foshan Keylewatt Technology Co., LTD , https://www.klwenergy.com
First, basic concepts
AGM battery, the full name of Absorbent Glass Mat battery, that is, adsorbed glass fiber separator battery, is an innovative lead-acid battery. It uses a special glass fiber separator, which can effectively adsorb and fix the electrolyte, so as to achieve efficient and balanced charging and discharging of the battery.
​Second, technical characteristics
Efficient charging and discharging: Thanks to the special glass fiber separator, AGM batteries ensure that the electrolyte is evenly distributed inside the battery, thus improving the charging and discharging efficiency of the battery.
Sealed design: Most AGM batteries have a sealed design that eliminates the need for open exhaust, but instead regulates the internal and external air pressure through a pressure control valve. This design not only avoids the emission of acid mist, but also makes the battery more heat-resistant and reduces the performance degradation caused by excessive water loss.
Strong durability: The cycle charging capacity of AGM batteries is high, usually able to reach about 3 times that of lead-calcium batteries, so its service life is longer. At the same time, its capacitance also shows high stability during the whole service cycle.
Low temperature start reliable: The AGM battery in low temperature environment starting performance is more reliable, to ensure the normal use of the vehicle in cold weather.
Environmental protection: The design of the AGM battery reduces the emission of acid fog and pollution to the environment, which is in line with the modern environmental protection concept.
3. Application scenarios
Due to its superior performance characteristics, 2V AGM batteries are widely used in a variety of scenarios that require high-reliability and long-life batteries. For example, it can be used as a backup power supply to provide stable power support for key facilities such as communication base stations and data centers. It can also be used as a part of the energy storage system to store and release electrical energy to meet the power needs of different time periods.
July 26, 2025