The simple practice of fly ash water demand can be determined by the ratio of water consumption to 125ml when the flow degree of test mortar reaches 130-140mm mentioned in the specification. The specific steps are as follows:
Before the test, wipe the tryout with a damp cloth and keep it moist.
Weigh 75g of fly ash, 175g of cement, 750g of standard sand, put it into the mixing pot and stir it according to the regulations.
The mixed test mortar is quickly divided into two layers and loaded into the mold, and each layer is flat and compacted.
After the first layer is smoothed, the tryout is placed on the vibrating table for vibrating.
The second layer of mortar material is poured into the tryout mold and vibrated again.
The test mold containing the sample is placed in a curing box for 24 hours.
After the mold is removed, the prepared test specimens are cured to the specified age under standard curing conditions.
The fluidity of the test mortar and the comparison mortar was determined according to the standard method, and the ratio of water addition when the fluidity of the two reached 130mm-140mm was used to determine the water demand ratio.
Through the above steps, the water demand of fly ash can be measured more accurately. At the same time, in order to obtain more accurate results, it is recommended to strictly control the operation details and experimental conditions during the experiment to ensure the reliability of the experimental results.