Chemical agents for modifying or treating sand, stone, rock, gravel, or other natural or synthetic aggregates used in preparing mortar cement, concrete, masonry, asphalt, road base, or other construction materials; chemical agents for modifying or treating clay or argillaceous materials contained in aggregates or other construction materials; clay treatment chemical agents for use in quarries, mines, well bore formations, or concrete mix plants

'agent':2,32,51 'aggreg':16,43 'argillac':39 'asphalt':24 'base':26 'bore':58 'cement':21 'chemic':1,31,50 'clay':37,48 'concret':22,61 'construct':29,46 'contain':41 'format':59 'gravel':10 'masonri':23 'materi':30,40,47 'mine':56 'mix':62 'modifi':4,34 'mortar':20 'natur':13 'plant':63 'prepar':19 'quarri':55 'road':25 'rock':9 'sand':7 'stone':8 'synthet':15 'treat':6,36 'treatment':49 'use':17,53 'well':57

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