Crush test comparison between K Form and Tec-Form

1. Strength Comparison Tec-
Form vs K-Form
Performed at A E Oscroft & Sons (Redditch)

2. Overview
• The purpose of the strength test was to check when force is applied
directly on to the top of the screed rail, at what point the rail would
start to deflect and the manner of this deflection.
• A 50mm section (with no cross holes) of each part tested was placed
in a compressive tester and an incremental force applied to the top of
the rail to emulate some of the forces applied during the application
of the product.
• At each incremental force a measurement of deflection was taken
and recorded with some photographic evidence where deemed
useful.

3. General Set Up

4. K-Form 40
FORCE (Vertical) DEFLECTION COMMENTS
50KG 0.1mm Part stable
100KG FAILURE Part collapsed at 65KG Force applied
FORCE (Vertical) DEFLECTION COMMENTS
50KG 0.1mm Part stable
100KG FAILURE Part collapsed at 65KG Force applied

5. K-Form 80
FORCE (Vertical) DEFLECTION COMMENTS
50KG 0.05mm Stable
100 KG 0.1mm Slight bend appears in vertical wall (see
photo)
150KG FAILURE Part collapsed at 130KG Force applied

6. Tec-Form 40
FORCE (Vertical)m DEFLECTION COM00MENTS
50KG 0.05mm Part Stable
100KG 0mm
150KG 0mm
200KG 0.05mm
250KGmm 0mm
300KG 0mm
350KG 0mm
400KG 0.3mm See photo 1 following slide, part starts to
show deflection
450KG FAILURE at 430KG See photo 2 & 3 following slide

7. TEC Form 40 cont…

8. Tec Form 80
FORCE (vertical) DEFLECTION
50KG 0.2mm Base deflection to flat
100KG 0.1mm Base deflection to flat
150KG 0.0mm Stable see photo 1 following slide
200KG 0.05mm
250KG 0.1mm See photo 2 following slide
300KG FAILURE only 0.2mm deflect See photo 3 following slide

9. Tec Form 80 cont…

10. Conclusion
• The test proves conclusively that the Tec Form out performs the K
Form when force is applied vertically to similar sections (ie no cross
holes present)
• Although this test emulates some of the force during application it is
no way fully representative of the application and the forces that
these products will go through in the field, however, we would expect
with the above evidence that the Tec-Form products will have
inherent strength advantages in all ways over the K-Form products.