Three anti-Adani protesters have been arrested after refusing to stop blocking concrete trucks from leaving or entering an industrial site in Brisbane.

Protesters sat on the road outside Meales concrete pumping on Oakwal Lane in Windsor from about 7.30am on Monday, demanding the company refuse to work with Adani in the future.

Protesters blocking trucks from entering and leaving the Meales site on Monday, July 22.

In a statement, Galilee Blockade spokesman John Brinnand said many people in the Stop Adani movement believed peaceful direct action was "all they have left".

"The Adani mine will undoubtedly become this generation's Franklin Dam moment," he said.