Experimental investigation on bending strength of compacted plastic-concrete

Excessively high temperatures could lead to thermal aging of plastic, resulting in decline in performance of compacted plastic concrete.

“However, it should be noted that excessively high temperatures could lead to thermal aging of the plastic, resulting in a decline in the performance of the compacted plastic concrete.”

Strength of compacted concrete did not diminish as plastic content increased.

“In contrast to using non-melted plastic waste as aggregates in fresh concrete, the strength of the compacted concrete did not diminish as the plastic content increased (Figure 17).”

Inclusion of plastic waste powder significantly reduced compaction pressure required for forming, enhancing energy efficiency.

“In comparison to the test conducted by Sakai et al. [120] using a pressure of 100 MPa, the inclusion of plastic waste powder significantly reduced the compaction pressure required for forming, thereby enhancing the energy efficiency of the recycling process.”

Successful formation of plastic concrete strongly influenced by optimal molding temperature, set below melting point of plastic.

“Moreover, the successful formation of plastic concrete was strongly influenced by an optimal molding temperature, which was set below the melting point of the plastic material.”

Hot-pressing process facilitated bonding between plastic and concrete powders.

“The hot-pressing process played a crucial role in facilitating the bonding between the plastic and concrete powders.”

Cement concrete units (no plastic) absorbed more water than recycled plastic waste concrete.

“The findings showed that the cement concrete units (with no plastic), which were determined to be hydrophilic, absorbed more water than the recycled plastic waste concrete (hydrophobic) [96,123].”

Plastic content contributes to reducing water absorption of concrete.

“This shows that the plastic content contributes to reducing water absorption of the concrete (Figure 18).”

Plastic concrete compacted at max pressure 50 MPa exhibited superior bending strength compared to conventional concrete.

“The findings indicated that plastic concrete compacted at a maximum pressure of 50 MPa exhibited superior bending strength compared to conventional concrete.”

Strong adhesion between plastic and concrete powder during hot-pressing may have led to this outcome.

“The strong adhesion between the plastic and concrete powder during the hot-pressing process may have led to this outcome [96].”