[Materials used]

Cement, fly ash, and admixtures: passed routine tests and met specified requirements.

Sand and stone: Crushing index, mud content, etc. are all in compliance with regulations

Release agent: It has a factory certificate and its performance has passed the on-site inspection.

[Quality Standard]

The surface of the concrete test block shall not have honeycombs, pitted surfaces, missing edges or corners, and the geometric dimensions shall meet the requirements.

Extended information

Note

1. The sampling of the concrete mixture should be representative. When sampling, it is advisable to accelerate the mixing of the concrete tanker for 2-3 minutes. After the concrete mixture is mixed evenly, start discharging. 2. Sampling of the same group of concrete mixtures should be randomly selected from the same transport truck. The sampling volume should be more than 1.5 times the amount required for the test, and should not be less than 20L.