| 摘要 |
<p>PURPOSE: An artificial gravel and concrete are provided which has an excellent tensile strength. CONSTITUTION: The artificial gravel comprises:35- 51 Weight % of waste plastics, 10- 18 weight % of waste styrofoam, 13-25 weight % of carbon fiber, 13- 17 weight % of waste tire and 5- 15 weight % of gypsum are mixed, followed by melting and extruding to give the artificial gravel. A dumbbell type gravel comprises:A long supporting rod(3) which peripheral surface is uneven to increase cohesion and binding force, round spherical bodies(4, 5) formed in the both sides of the supporting rod(3). The concrete thereof comprises:40¯60% of artificial gravel, 25¯37% of sand, 7¯17% of cement, 5¯7% of water, and 1% of air.</p> |
