Density and bulk density of cement

The density and bulk density of cement are as follows:

The density of portland cement is 3.0~3. 15g/cm3, and the density of slag cement, pozzolanic cement and fly ash cement is 2.8~3. 1g/cm3.

The bulk density of bulk cement is 14.5kn/m 3 when φ = 30, 16kn/m 3 when packed and 12m when the tank is high. Due to the small diameter and uncompacted cement tank, its bulk density only increased slightly, about 14.6 ~ 65438.

Extended data:

Cement density refers to the quality of cement per unit volume under dry conditions. The unit of cement density is g/cm? . The density of bagged ordinary portland cement usually needs to be measured according to standards.

The measurement methods include Lee's method and gas displacement method.

Lee's method:

The key of cement density measurement is to measure the actual weight of cement per unit volume. The classic method is to use liquid displacement method. At constant temperature, the volume of Lee's bottle with a certain weight of cement was measured with a volume scale. Cement and a certain amount of liquid medium are added into the Lee's bottle, and the liquid medium is fully saturated by cement particles. This method has less investment, but the determination time is generally more than 2 hours, and the operation is more troublesome.

References:

Cement density _ Baidu Encyclopedia