Shanghai Meiyu products haveCement free calcium oxide analyzerConcrete and cement testing instruments, highway geotechnical testing instruments, asphalt waterproofing membrane testing instruments, chemical analysis instruments, testing machines, scales, test molds, screening tools, etc. We can provide a complete set of testing instruments and inspection equipment for highways, railways, bridges, mixing plants, municipal engineering, colleges and universities, and engineering quality inspection centers.Cement free calcium oxide analyzerThe warranty period for the product is one year from the official delivery date. During the warranty period, the supplier shall provide timely and free maintenance services for all types of equipment malfunctions. Timely and free replacement of all types of parts damaged by non-human factors. If the equipment malfunctions during use outside the warranty period, the supplier shall promptly provide service to the ordering party and actively assist them in completing maintenance.

Related equipmentConstant loading cement pressure testing machine

Introduction:
Using a single-chip microcomputer chip as the central control chip and employing large-scale integrated circuits. Through rigorous scientific design, the constant temperature control of the constant temperature bath has been completed. Conducting electrode loading power supply, measuring conductivity, keyboard management, data display, and other related tasks. The main method is to use ethylene glycol extraction benzoic acid direct titration, which can quickly and accurately determine the content of free calcium oxide under specific conditions in just 3 minutes.

Parameters:
Accuracy: The standard deviation is 0.046%.
Extraction time: 3 minutes.
Power supply voltage: 220V 50HZ.
Power: 3OOW.
Measurement range: 0-10.00% FcaO.
■ Division accuracy: 0.01% FcaO.
Electrode constant: 1 ± 0.2.
Control accuracy: ± 0.5 ℃.
■ Temperature of the constant temperature bath: C ± 2 ℃ C - is the set temperature value.
■ Temperature setting range: 30-100 ℃.
Environmental temperature: 10-40 ℃.
Environmental humidity:<85% RH.

Operation:
This instrument is easy to operate and use. The instructions for use are as follows:
When using this instrument, it should be placed flat.
Before placing the conical flask, first push the movable rod upwards by hand, then place the conical flask on the furnace plate, and slowly move downwards by hand. The condenser tube should be connected to the conical flask.
The water in the bucket should reach three-quarters of about 1500ml (place the bucket in the instrument, add water to the bucket, first use a screwdriver to unscrew the screws, open the upper back cover of the instrument, add water to the bucket, and then install the back cover).
After turning on the power, if you want to preheat, stir, and cool first, you can directly press the [Heat] button, [Stir] button, and [Cool] button. If you want to switch to automatic mode, you need to set the running time first, and then press the [Start/Stop] button.

working principle:
After the reaction between ethylene glycol and free calcium oxide in cement clinker, the conductivity of the solution is proportional to the content of free calcium, and the content of free calcium oxide in cement clinker is indirectly reflected through the measurement of conductivity. This instrument requires calibration to achieve accurate measurement.
Organic solution ethylene glycol reacts with free calcium oxide in cement clinker at high temperatures:
（CH2OH）2+CaO→（CH2O）2Ca+H2O
The calcium glycol formed by the above reaction dissociates in ethylene glycol according to the following formula:
（CH2O）2Ca→（CH2O）22-Ca+Ca2+
Ethylene glycol ions and calcium ions conduct electricity in solution, and the degree of conductivity is related to the content of free calcium oxide. The content of free calcium oxide in cement clinker can be indirectly measured by measuring the conductivity of the solution.
In the use of instruments, the cleanliness of electrodes has a significant impact on the accuracy of measurement results. Therefore, the conductivity electrode should be kept clean during the use of the instrument.