Monitoring of bridge overlay using shrinkage modified high performance concrete based on strain and moisture evolution

Yifeng Ling, Gilson Lomboy, Zhi Ge, Kejin Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

High performance concrete (HPC) has been extensively used in thin overlay for repair purpose due to its excellent strength and durability. This paper presents an experiment, where the sensor instrumented HPC overlays have been followed by dynamic strain and moisture content monitoring for 1 year, under normal traffic. The vibrating wire and soil moisture sensors were embedded in overlay before construction. Four given HPC mixes (2 original mixes and their shrinkage modified mixes) were used for overlays to contrast the strain and moisture results. A calibration method to accurately measure the moisture content for a given concrete mixture using soil moisture sensor was established. The monitoring results indicated that the modified mixes performed much better than the original mixes in shrinkage cracking control. Weather condition and concrete maturity at early age greatly affected the strain in concrete. The strain in HPC overlay was primarily in longitudinal direction, leading to transverse cracks. Additionally, the most moisture loss in concrete occurred at early age. Its rate was very dependent on weather. After one year, cracking survey was carried out by vision to verify the strain direction and no cracks observed in shrinkage modified mixes.

Original languageEnglish (US)
Pages (from-to)155-174
Number of pages20
JournalStructural Monitoring and Maintenance
Volume10
Issue number2
DOIs
StatePublished - 2023
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

Fingerprint

Dive into the research topics of 'Monitoring of bridge overlay using shrinkage modified high performance concrete based on strain and moisture evolution'. Together they form a unique fingerprint.

Cite this