Method for testing loss on ignition of coal ash

The invention relates to a method for testing loss on ignition of coal ash. The method comprises the steps of mixing coal ash to be tested with cement to form a mixture; adding water to the mixture to be stirred to form testing size; inserting a probe into the testing size, and observing whether the probe settles to judge whether the coal ash meets standard. The fact that the most direct result of over-high loss on ignition of coal ash is water demand increase is utilized, a direct testing method is adopted, in other words, whether the coal ash meets water demand is tested quickly by observing whether a pin settles instantly after being inserted into the testing size, and if water demand is met, loss on ignition meets using requirements. By the adoption of the method, testing time is extremely short, whether the coal ash meets using requirements can be judged after the pin is inserted into the testing size formed through stirring, and testing time is shortened greatly and time for coal ash to enter factory is