| In order to explore the influence of moisturizing and anti-cracking additives on the physical properties of rock-like materials, river sand was used as aggregate, lime and gypsum were used as cement, and 3%, 5% and 7% glycerin, paraffin and silicone oil were added to the uniaxial compression test to observe the changes of physical parameters. The results show that the density of the samples under the conditions of the three different additives shows an upward trend, but the elastic modulus and uniaxial compressive strength show a decreasing trend, among them, the effect of glycerol on the density is greater than that of paraffin wax and silicone oil, and the paraffin wax and silicone oil show good consistency, and the content of different additives is 5% With the increase of additive content, the sample gradually changed from brittle failure to plastic failure, and glycerol had the most significant effect on the plastic failure after the peak, the elastic modulus and uniaxial compressive strength both showed a power function downward trend with the increase of additive content, glycerol was the most sensitive, and its moisturizing and anti-cracking properties were the best, while paraffin wax and silicone oil showed high similarity to elastic modulus and compressive strength but had relatively little effect. The results of this study can provide a reference for the accurate fabrication of similar rock samples and the maintenance of surface smoothness and good integrity during curing. |
