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About protein based foaming agent concrete

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Air entrainment was found accidentally in the mid-1930s.[two] At that time, cement manufacturers had been using a grinding aid to improve the entire process of grinding cement. This grinding aid was a mixture of assorted chemicals, which include salts of wood resin, which had been included towards the cement through https://zanderfhgfd.wikiparticularization.com/1527778/the_ultimate_guide_to_stamped_concrete_paint

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