Anisotropic Concrete Compressive Strength

Søren Gustenhoff Hansen, Henrik Brøner Jørgensen, Linh Cao Hoang

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When the load carrying capacity of existing concrete structures is (re-)assessed it is often based on compressive strength of cores drilled out from the structure. Existing studies show that the core compressive strength is anisotropic; i.e. it depends on whether the cores are drilled parallel or perpendicular to the casting direction. Engineers may therefore misjudge the load carrying capacity. Thus structures may be strengthened or rebuilt unnecessarily or left in service with high failure probability. This paper presents a literature review and an experimental study on the anisotropy and its correlation to the curing time. The experiments show no correlation between the anisotropy and the curing time and a small strength difference between the two drilling directions. The literature shows variations on which drilling direction that is strongest. Based on a Monto Carlo simulation of the expected variation it is argued that the variation of the anisotropy may be statistically coincidences.
Original languageEnglish
Title of host publicationProceedings of 39th IABSE Symposium - Engineering the Future
Number of pages8
Publication date2017
Publication statusPublished - 2017
Event39th IABSE Symposium: Engineering the Future - Vancouver, Canada
Duration: 21 Sep 201723 Sep 2017
Conference number: 39


Conference39th IABSE Symposium

Cite this

Gustenhoff Hansen, S., Jørgensen, H. B., & Hoang, L. C. (2017). Anisotropic Concrete Compressive Strength. In Proceedings of 39th IABSE Symposium - Engineering the Future