Over the last two decades, new water-soluble monocyclic aromatic (MA) polymers have been developed: sulfonated phenol–formaldehyde polymer (SPF), aminosulfonate–phenol–formaldehyde polymer (AS) and ...
Learn how the slump test measures the consistency of fresh concrete and why it matters for getting the right mix on the job. ‘That’s on you’: This US mayor has a blunt message for Trump and his ICE ...