An investigation of the water absorption characteristics of a laser generated glaze on the ordinary portland cement surface of concrete

C. B. Ho, J. Lawrence, L. Hao

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

Abstract

A comprehensive investigation of the effectiveness of a CO2 laser generated glaze on the absorption characteristics of OPC has been conducted. The experimental results from the absorption tests confirmed that the CO2 laser generated glaze surface on the OPC had successfully reduced the absorption rate by 77% as compared to the untreated OPC. The presence of dissimilar layers on both the untreated and CO2 laser treated OPC was established. Two dissimilar layers, which were the OPC material and the concrete material respectively were identified for the untreated concrete. As for the CO2 laser treated OPC, four dissimilar layers were identified. These were the glaze, the HAZ, the OPC and the concrete aggregate respectively. For the CO2 laser treated OPC, the sorptivity of the first layer (CO2 laser generated glaze) was 0 mm min -1/2 on account of the fact that it is an amorphous structure. The sorptivity of the second layer (HAZ) was 0.057 mm min-1/2, which was 42.5% higher than the third layer (OPC) where the sorptivity value was 0.040 mm min-1/2. Consequently, it was concluded that reduction in the thickness of the HAZ layer and improvement in the quality of glaze layer would further enhance the effectiveness of the CO2 generated glaze on the OPC surface of the concrete.

Original languageEnglish
Title of host publicationICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings
DOIs
Publication statusPublished - 1 Dec 2003
Externally publishedYes
EventICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics - Jacksonville, United States
Duration: 13 Oct 200316 Oct 2003

Publication series

NameICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings

Conference

ConferenceICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics
CountryUnited States
CityJacksonville
Period13/10/0316/10/03

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Electrical and Electronic Engineering

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    Ho, C. B., Lawrence, J., & Hao, L. (2003). An investigation of the water absorption characteristics of a laser generated glaze on the ordinary portland cement surface of concrete. In ICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings [1509] (ICALEO 2003 - 22nd International Congress on Applications of Laser and Electro-Optics, Congress Proceedings). https://doi.org/10.2351/1.5060017