The Only Rubble Pile is Between Astronomers' Ears
From: https://www.thunderbolts.info/wp/2014/06/27/dynamic-asteroids/
Most asteroids are presumed to be loosely compacted “rubble piles”. The idea came about in order to help explain various mass anomalies that have been seen in asteroid crater studies, along with experiments like Deep Impact, and observations of what appears to be “regolith migration” on asteroids Itokawa and Eros. Since gravitational acceleration on asteroids is minute, banding, landslides, and layering is thought to be due to micro-meteor impacts shaking the asteroids. Over long periods of time, the shaking sorts the materials by size and density in the same way that a jar of sand and pebbles will sort itself when it is shaken.
Some asteroids, such as Vesta, have craters that should have shattered them into fragments when they were hit. Vesta is only 520 kilometers wide, but possesses a crater 460 kilometers in diameter The only suitable explanation, according to gravity-based models of asteroid behavior, is that they are like big sand piles, absorbing impacts without shattering.
The electric model of asteroid formation does not require that one body crash into another one for there to be craters. Electric arcs have the ability to cut surfaces, scoop out material and then accelerate it into space, leaving clean cuts, deep pits and chaotic topography. The effect is commonly called electric discharge machining (EDM). Comets also exhibit surface features that are the same as what has been seen on asteroids, leading Electric Universe theorists to speculate that the two are really one thing and not “dirty snowballs” vs. rocky bodies.
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https://www.thunderbolts.info/wp/2014/06/27/dynamic-asteroids/