The frabrication of natural rubber/gravel composites and the adhesion between gravel and rubber were investigated. Water glass was used as binder and reinforcement. A coupling agent was also used to increase adhesion between sulfer and gravel. The composite can be used as a construction material where high strength is not critical such as in driveways or in road construction. This properties tested were the mechanical properties of composites ie. tensile strength, hardness, modulus of elasticity, stability and the physical properties of rubber itself. The results showed that a parameter had affected the tensile strength was sulfur which gave the maximum tensile strength at 2 phr for hardness, water glass gave a maximum value at 150 phr. The modulus of elasticity was influenced by sulfur, water glass and rubber/gravel ratio. Stability was affected by adhesion between gravel and rubber using marshall's test with 2 type of rubber latex; 60 %DRC and modified latex 45 %DRC. It was found that water glass had certain effect on stability. The calculated aging test of composites material with 60 %DRC latex was investigated. It was found the activation energy was 53.98 kJ/mol resulting in a half-life of 12.3 years for a composite when used at 35 ํC . Silane had no effect on that the composites