As a large number of road surfaces in our country enter the maintenance period, cold pavement regeneration technology will be more widely used. Cold recycled materials began to be generally used as base layers, and are now gradually being used as lower layers; In China's cold recycling construction, cement is widely used as a recycling agent, and its experimental methods have been relatively unified, mainly referring to traditional semi rigid materials.
Cold recycling machine rental manufacturers believe that the properties of cold recycling materials are not completely the same as traditional road materials, and therefore the requirements for forming are not entirely the same. Cold recycled materials can be roughly divided into two types according to the recycling agent: inorganic recycling agent and asphalt recycling agent. During asphalt recycling, a small amount of cement is often added to improve its resistance to water damage.
The commonly used inorganic regenerant is cement, and there are other types such as fly ash and cement fly ash. Inorganic stable cold regeneration is generally formed and cured using traditional semi rigid materials. Conduct heavy compaction test or vibration compaction test at room temperature, and maintain for 7 days at 20 ℃ or 25 ℃.
Determine the optimal water content through the relationship between water content and strength. The situation during cold regeneration of asphalt stabilizers is relatively complex, and there is no unified method. The common method for designing the composition of cold recycled materials is to use the compaction method to determine the optimal liquid volume, and to use one or more of Marshall stability, dry splitting strength, and wet splitting strength to determine the asphalt dosage.
At present, the structures commonly used in cold recycled roads in China include hot mix asphalt mixture layer+recycled layer+semi rigid layer and hot mix asphalt mixture layer+recycled layer.
Cold regeneration has a good ability to eliminate cracks, permanent deformation, and surface damage. In addition, semi rigid base asphalt pavement is commonly used in our country, and there are cracks in the base layer. Sometimes, it is necessary to maintain the surface layer and base layer simultaneously. In this case, the cold recycling method is particularly suitable. If you have any further questions, please come to our website https://www.sddhfjx.com Consult!