FUNDAMENTAL-STUDY ON HYDRATION OF CEMENT AND CEMENT MINERALS WITH STEAM

This paper-discusses the basic concept of steam hydration and presents test data oil heat of hydration by exposing cement compounds to press urized steam. The lest samples include cement and its individual compo unds; tricalcium silicate (C3S), dicalcium silicate (C2S), tricalcium aluminate (C(3)A), and tetracalcium aluminoferrite (C(4)AF). For a com pacted 10 grams C3S sample, the heat of hydration was determined as 20 9 cal/g. All samples except C;A hardened during steaming. Nonetheless, rite C(3)A samples reacted very rapidly with steam and registered a 9 1 C temperature rise during the test. This paper also discusses effect s of sample's fineness and degree of compaction on heat evolution and hydrate morphology during exposure to steam. The test results verify t he validity of the dry-mix/steam-injection (DMSI) concept.