id	keyword
american_scientific_journal-10305	materials
american_scientific_journal-10305	source
american_scientific_journal-10305	engineering
american_scientific_journal-10305	construction
american_scientific_journal-10305	cinder
american_scientific_journal-10305	volume
american_scientific_journal-10305	lvrs
american_scientific_journal-10305	pozzolana
american_scientific_journal-10305	cbr
american_scientific_journal-10305	layers