Piezoresistance self-sensing cement concrete material, pavement structure and paving method

Abstract

The invention discloses a piezoresistance self-sensing cement concrete material, which is prepared from the following raw material components: cement, water, sand, gravels, graphite powder, steel slag, graphene nanosheets, multi-walled carbon nanotubes and a dispersing agent. The invention further discloses an assembly type cement concrete pavement structure with the piezoresistance self-sensing function. The assembly type cement concrete pavement structure comprises a roadbed layer, a subbase layer, a base layer, waterproof geotextile and a plurality of piezoresistance self-sensing cement concrete pavement slabs which are sequentially arranged from bottom to top. The invention further discloses a paving method of the concrete pavement structure, the self-sensing cement concrete pavement slabs are hoisted on the supporting layer through the lifting hooks and connected through the rabbet mortises and tenons, after laying is completed, the positions of the lifting hooks are leveled, andthe assembly type cement concrete pavement structure with the self-sensing function is obtained. The fabricated cement concrete pavement structure with the self-sensing function provided by the invention can be locally replaced, so that the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a piezoresistive self-sensing cement concrete material, an assembled cement concrete pavement structure and a paving method with a piezoresistive self-sensing function. Background technique [0002] In recent years, as people have higher requirements for the health and safety of road structures, structural health monitoring (SHM) has also attracted widespread attention. The traditional SHM system acquires real-time data of the structure by installing sensors, such as optical fibers, strain gauges and piezoresistive strain sensors, into the structure. In addition, because the monitoring of traffic flow is also crucial to traffic management and operation, people began to have higher requirements for the functions of the SHM system, and the types and layout methods of sensors have also been enriched. These sensors measure the state parameters of the structure...

AI Technical Summary

Problems solved by technology

However, the current self-sensing concrete is not well dispersed in the concrete matrix due to the conductive material, which affects the sensing function of the self-sensing concrete and reduces the microstructural properties of the concrete.

In addition, the current self-sensing concrete is expensive and the technology has not been fully utilized, so it is difficult to use it on the entire road section

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