Preparation method for asphalt concrete with conduction function

Abstract

The invention relates to a process for preparing asphaltic concrete with conducting function, which is characterized in that the process includes the procedures of 1), preliminary treatment of aggregates, which means washing away the foreign matters of the steel slag with water. 2), raw materials preparation, which means that the percentage by weight of each component is that rough aggregates is 55%-80%, fine aggregates is 13%-30%, mineral filler is 7%-15%, the rough aggregates, fine aggregates and mineral filler are selected to reserve as aggregates, consumption of asphalt cement is 6%-8% of the weight of the aggregates, consumption of fabric stabilizer is 0.1%-0.5% of the gross weight of the aggregates and the asphalt cement, consumption of conducting material is 10-30% of the weight of the asphalt cement, and gradation design of SMA mixture is employed. 3), mixture blending, which means charging fractionally and blending multitime, the temperature is kept not lower 150 DEG C when molding. The preparing process has simple technique and low cost. The prepared asphaltic concrete has good conducting function and pavement using property.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a preparation method of asphalt concrete with conductive function. Background technique [0002] Conductive concrete is a research hotspot in the field of materials in recent years. This kind of concrete itself can conduct electricity without embedding sensor devices, and will not have adverse effects on the structure of the road surface. Its self-sensing capabilities for strain, damage, and temperature can be utilized. It is used for vibration control of building structures, traffic management, load measurement, building safety, etc.; at the same time, it can heat itself by using the electrothermal effect. This function can be widely used in road snow melting and deicing. However, existing studies mainly focus on cement concrete materials. There are few research reports on conductive asphalt concrete. [0003] Conductive SMA mixture is mixed with co...

AI Technical Summary

Problems solved by technology

However, these conductive phase materials have their own shortcomings.

Existing studies have found that: carbon fiber is a good conductive phase material, but carbon fiber is expensive, the cost is too high, it is difficult to disperse evenly in concrete, and it is easy to flocculate into agglomerates; graphite powder is also a good conductive phase material, However, due to the layered structure of graphite, the addition of graphite has an impact on the performance of conductive concrete, and there is also a problem that it is difficult to disperse evenly; carbon powder and coke are limited to their own conductivity, and the effect of improving the conductivity of concrete is not as obvious as that of graphite powder. Like graphite powder, there is a problem of uniform dispersion, which also has a great impact on the performance of concrete; adding steel fibers and steel shavings to concrete will improve its mechanical properties and electrical conductivity

However, with the prolongation of time, the surface passivation of steel fibers and steel shavings in concrete will lead to a significant increase in resistivity with the prolongation of time.