ASTM C78 is the test method for the flexural strength of concrete using a simple beam with third-point loading. To match this to your program, talk with our team.
What ASTM C78 Covers
It determines the flexural strength (modulus of rupture) of a concrete beam, an important property for pavements and slabs that carry bending loads.
How the Test Is Run
A concrete beam is supported near its ends and loaded at the third points until it fractures, and the modulus of rupture is calculated from the peak load and beam dimensions.
Why It Matters
Flexural strength governs concrete pavement and slab design; a stiff loading frame with third-point fixturing and a controlled rate is required.
Reading the Designation
Cited as ASTM C78 with its edition year. Confirm the edition and specimen or fixture requirements before finalizing setup. To configure a bend or flexural setup, request a quote.
Related Standards
ASTM C1550 covers flexural toughness of fiber-reinforced concrete and EN 12390-3 covers concrete compression.
Request a Quote
Setting up concrete flexural testing? Request a quote and our team will help you build a system matched to your beam size and force capacity.
TensileMill CNC products for ASTM C78
Our specimen-preparation systems and testing equipment compatible with ASTM C78:
Electro Mechanical Universal Testing System 5 kN / 50 kN with Precision Load Cell
Electro-Mechanical UTM · 5 kN / 50 kN with Precision Load Cell
Bending Fixtures for Standard 3-Point Flexural Testing
Bending fixtures for standard 3-point flexural testing
Configure your ASTM C78 setup with TensileMill CNC
From specimen preparation to the test itself, TensileMill CNC supports the full ASTM C78 testing chain. Depending on your specimens, that can include universal testing machines with three- and four-point bend fixtures. Share your material mix and throughput, and we will recommend a setup that fits ASTM C78.