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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Tools > Frequently Asked Questions
Q. What is an expansive cement and what are the different types of expansive cement? A. An expansive cement is a cement that when mixed with water produces a paste that after setting increases in volume to a greater degree than does portland-cement paste. Type K expansive cement — a mixture of portland cement, anhydrous tetracalcium trialuminate sulfate (C4A3S), calcium sulfate (CaSO4), and lime (CaO). Type M expansive cement — interground or blended mixtures of portland cement and calcium sulfate suitably proportioned. Type S expansive cement — a portland cement containing a high computed tricalcium aluminate (C3A) content and an amount of calcium sulfate above the usual amount found in portland cement. References: ACI 225R-19; ACI 232.2R; SP-064; SP-38; SP-307 Topics in Concrete: Cementitious Material; Expansive Cement
Q. What is an expansive cement and what are the different types of expansive cement?
A. An expansive cement is a cement that when mixed with water produces a paste that after setting increases in volume to a greater degree than does portland-cement paste.
Type K expansive cement — a mixture of portland cement, anhydrous tetracalcium trialuminate sulfate (C4A3S), calcium sulfate (CaSO4), and lime (CaO).
Type M expansive cement — interground or blended mixtures of portland cement and calcium sulfate suitably proportioned.
Type S expansive cement — a portland cement containing a high computed tricalcium aluminate (C3A) content and an amount of calcium sulfate above the usual amount found in portland cement.
References: ACI 225R-19; ACI 232.2R; SP-064; SP-38; SP-307
Topics in Concrete: Cementitious Material; Expansive Cement
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