Opposition leader Milton Dick questioned Cr Quirk about five meetings held between lobbyist Rowland Pty Ltd on behalf of Future Quarry Resources and council representatives including the deputy mayor in June and July this year at Tuesday's council meeting.

Cr Quirk said he had no knowledge of the meetings but did not rule out the possible sale of the two sites at Mt Cootha and Bracalba, north west of Caboolture.

"I was not aware of those particular meetings, I don't know about all meetings held across the organisation, but I make it clear I never rule anything in or out," Cr Quirk said.

"We will continue to look at every opportunity for savings, for opportunities to drive value for money.

"We would not be doing our job if we did not continue to explore if we were getting value for money out of assets that we have."

Deputy mayor Adrian Schrinner, who attended two of the meetings, also declined to say whether sales of the sites was discussed.

"The meeting was simply for a couple of individuals to introduce themselves to explain their role in the quarrying industry," he said.

A spokeswoman for Rowland Pty Ltd said she could not comment.

"Rowland has a policy of not discussing client activities," she said.

The question was raised by Cr Dick during Question Time.

He also asked Crs Quirk and Schrinner on the relevance of the meetings to nearly $77,000 in donations made by Rowland to the LNP in the past two financial years.

"Cr Dick is trying to suggest there is something untoward going on here, something secretive. How does he know about this meeting if it's so secretive?" Cr Schrinner said.

The meetings were registered by Rowland with the Queensland Integrity Commissioner, as required by law.

Brisbane City Council has owned and operated Bracalba Quarry, 70 kilometres north of the city, since 2003.

It supplies more than two million tonnes of quarry products each year for civil construction projects of all types and sizes.

The 30 hectare Mount Cootha quarry has been operational since 1919 and produces more than 400,000 tonnes of asphalt aggregate each year.