Specifications for high-performance concrete
When I was a graduate student in the 1980s, papers about high-performance concrete nearly always started out by explaining that “high performance” means more than high strength. Then they went […]
Insights
Concrete “permeability” tests
For the most part, so-called concrete “permeability” tests measure something other than permeability. Permeability is the ease with which fluids can move through a porous material. That matters because most […]
I-91 Brattleboro Bridge relied on MacDonald’s expertise
Beton’s Kevin MacDonald designed the concrete mixture proportions and performed thermal control modeling for the I-91 Brattleboro Bridge in Vermont. The bridge took First Place in the Infrastructure Division of […]
Concrete sample size: how big is big enough?
When you submit a concrete sample for petrographic examination, how big a sample do you need? That is, what’s the appropriate concrete sample size? We’ve discussed in previous posts how […]
Do we expect too much from ASTM C1202?
We often — mistakenly — refer to ASTM C1202, “Standard Test Method for Electrical Indication of Concrete’s Ability to Resist Chloride Ion Penetration,” as the Rapid Chloride Permeability test. Permeability […]
2019-2020 ABET criteria for student outcomes
For would-be engineers, the Accreditation Board for Engineering and Technology (ABET) sets the standards for university education. University engineering departments seeking accreditation must demonstrate how they meet the ABET criteria. […]
Concrete petrography gives a grander view
Many engineers have no idea how informative concrete petrography can be. That’s too bad, because concrete petrography is one of the most useful techniques in forensic engineering. Failure analysis of […]
Write good engineering reports for clients
Many professionals struggle to write engineering reports for clients.* Most engineering schools provide some instruction in report writing, but students’ reports tend to be formulaic and stilted. However, once students […]
Design for resilient infrastructure
While it may seem that natural disasters are becoming more frequent and more severe, it isn’t necessarily so. However, more people are moving to areas that are exposed to flooding, […]
Tables and figures in technical writing
In technical writing for clients, it’s often necessary to include numerical data in graphical or tabular form. Good tables and figures in technical writing make complex information much easier for […]