id	keyword
american_scientific_journal-6803	test
american_scientific_journal-6803	method
american_scientific_journal-6803	concrete
american_scientific_journal-6803	aggregate
american_scientific_journal-6803	expansion
american_scientific_journal-6803	reaction
american_scientific_journal-6803	cement
american_scientific_journal-6803	silica
american_scientific_journal-6803	astm
american_scientific_journal-6803	alkaline
american_scientific_journal-6803	research
american_scientific_journal-6803	reactivity
american_scientific_journal-6803	mortar
american_scientific_journal-6803	testing