Foamed glass composite material
AssigneeEarthstone International LLC
InventorsAndrew Ungerleider, W. Gene Ramsey
Life of this patent
Estimating the term…
Abstract
An arrestor bed for slowing an aircraft overrunning a runway, including an elongated excavation and a plurality of irregularly shaped foamed glass bodies at least partially filing the excavation. Each respective irregularly shaped foamed glass body has an aspect ratio between 1:1.6 to 1:1.7 and a diameter of about 1 inch. The irregularly shaped foamed glass bodies intersect to define stacking angles of about 35 degrees. Under compression, the irregularly shaped foamed glass bodies crush and break up before slip failure occurs such that the roadbed has a crushing failure mode.
Claims4
A roadbed, comprising:
- an elongated excavation;
- a plurality of irregularly shaped open-celled foamed glass bodies at least partially filing the excavation, wherein each respective irregularly shaped foamed glass body has an aspect ratio of about 1:1.7 and a diameter of about 2.5 centimeters;
- wherein the roadbed is positioned at the end of a runway;
- wherein the irregularly shaped foamed glass bodies intersect to define stacking angles of about 35 degrees;
- wherein the irregularly shaped foamed glass bodies have densities of between 100 kg/m3 and 180 kg/m3;
- wherein the irregularly shaped foamed glass bodies have a crush strength of at least 689.5 kPa;
- and
- wherein under compression, the irregularly shaped foamed glass bodies crush and break up before slip failure occurs such that the roadbed has a crushing failure mode.
A roadbed having crushing failure mode, comprising:
- an elongated excavation;
- a plurality of irregularly shaped elongated foamed glass bodies at least partially filing the excavation;
- wherein each respective irregularly shaped elongated open-celled porous foamed glass body has an aspect ratio of about 1:1.65;
- wherein the 1:1.65 aspect ratios of the respective irregularly shaped elongated foamed glass bodies yields a stacking angle of about 35 degrees;
- wherein the irregularly shaped foamed glass bodies have a crush strength of between 344.7 kPa and 689.5 kPa;
- and
- wherein the plurality of irregularly shaped foamed glass bodies are constrained from slipping over each other in response to an applied compressive force by the stacking angle of about 35 degrees.
Dependencies are inferred from the claim text.