Measurement of the Compressive Strength of Concrete Using Modeling of Deep Hybrid Forest Regression

Table 1

Parameters selected as concrete prediction variables.

Materials	Sand	Gneiss	Sterile
Description	Fine	Gravel 1	Gravel 1
Specific mass (g/cm³)	2.65	2.69	2.73
Maximum dimension (mm)	2.36	19.00	19.00
Fineness modulus	1.98	6.97	7.02
Unit mass (kg/m³)	—	1396.47	1437.64