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New buildings or produce a lot of waste concrete in the removal process, constitute a major part of the construction waste. The most effective ways of utilizing the waste concrete is recycled aggregate were prepared, but at the same time a lot of cement mortar powder, the current domestic and international research and application of renewable powder is still relatively small. Primarily from recycled cement mortar powder performance, recycled asphalt mortar of cement mortar powder mixture performance test, and compared with traditional limestone slag, explore renewable cement mortar powder in application of asphalt mixture feasibility of renewable powder application to expand and improve its utilization. Compared with the limestone slag, of recycled cement mortar powder particle size is slightly larger, low density, high hydrophilic coefficient, but to meet the regulatory requirements of our asphalt mixture with slag. In addition to the carbonates and silicates of Ca-containing cement mortar powder containing Al, Fe,, K, and Mg various composed from the chemical point of view, since the presence has hydration and unhydrated cement reasons, regeneration compounds. Renewable cement mortar powder shape from the microsurgery structure, more single apparent angular surface floc attached, the structure is more leavening. Compared with the limestone slag asphalt mastic, recycled asphalt mastic cement mortar powder penetration, penetration index, small plastic temperature range, while its equivalent softening point, equivalent brittle point is relatively high, suggesting that regeneration cement mortar The high sensitivity of the temperature of the powder asphalt mastic, better high temperature stability, low temperature cracking performance is relatively poor. Recycled cement mortar powder slightly lower than the limestone slag asphalt mastic asphalt mastic 5 ℃ and 15 ℃ ductility, but its softening point and viscosity were higher, suggesting that the flexibility renewable the cement mortar flour asphalt mastic relatively poor, its resistance to high temperature deformation better performance, while mixing temperature and compaction temperatures were increased by about 5 ° C, 10 ° C. With the limestone ore asphalt mixes compared regeneration cement mortar powder asphalt mixture dynamic stability and high creep strain is small, high creep stiffness modulus destruction under low temperature flexural strength, maximum flexural tensile strain bending stiffness modulus is relatively small, suggesting that regeneration cement mortar powder asphalt mixture resistance to high temperature deformation properties better resistance to low temperature cracking performance is poor, to coincide with the experimental findings of the asphalt mastic. Marshall stability, recycled cement mortar powder asphalt mixture residue Marshall stability, TSR values ??are relatively high, indicating that the stability of water. The combination of high and low temperature performance point of view, recycled cement mortar powder asphalt mixture used in hot and humid areas more suitable.
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