Gradient measuring method of humidity of cement concrete pavement slab

Abstract

The invention relates to a gradient measuring method of humidity of a cement concrete pavement slab. The method comprises the following steps: determining the number and positions of measuring points along the depth direction of the pavement slab according to a principle that the upper and lower parts are dense and the middle is non-dense; after the cement concrete pavement is paved, inserting a PVC (Polyvinyl Chloride) sleeve at the measuring point and inserting a PVC insertion tube into the PVC sleeve, wherein the bottom end of the PVC sleeve is sealed and the side thereof is open; after initial set of concrete, taking out the PVC insertion tube, inserting a humidity sensor in, and smearing a sealant at the sealed part; and connecting a connector lug of the humidity sensor to a collector, and connecting a circuit to measure the humidity of the pavement slab. The method provided by the invention can guarantee that the measurement data of the pavement is relatively accurate and comprehensive, and meanwhile, few installation devices are required by measuring work and the measuring work is simple and feasible, and the measuring work has good repeatability.

Description

Technical field [0001] The invention belongs to the technical field of road construction detection, and particularly relates to a method for testing the humidity gradient in a cement concrete road slab. Background technique [0002] The uneven distribution of humidity causes the volume change of the pavement panel. When this change is restricted, the pavement will produce a huge warping stress, which is one of the main factors for the destruction of the pavement panel. The humidity gradient in the pavement slab is one of the important parameters for studying the warping stress of the pavement slab caused by humidity. At present, humidity sensors are generally used to test the internal humidity in concrete structures. However, there is no uniform requirement for the layout of the humidity sensor and the method to ensure that the sensor accurately collects the humidity data of the preset position. This may make the test work time-consuming and laborious, and it is not efficient. A...

AI Technical Summary

Problems solved by technology

At present, humidity sensors are generally used to test the humidity inside concrete structures, but there is no uniform requirement for the arrangement of humidity sensors and the method for ensuring that the sensors accurately collect humidity data at preset positions, which may make the test work time-consuming and laborious, and cannot be efficient and Accurately collect humidity data in sensitive areas, which in turn affects the calculation of subsequent warping stress

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