Email Address is required Invalid Email Address
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
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.
Staff Directory
ACI World Headquarters 38800 Country Club Dr. Farmington Hills, MI 48331-3439 USA Phone: 1.248.848.3800 Fax: 1.248.848.3701
ACI Middle East Regional Office Second Floor, Office #207 The Offices 2 Building, One Central Dubai World Trade Center Complex Dubai, UAE Phone: +971.4.516.3208 & 3209
ACI Resource Center Southern California Midwest Mid Atlantic
Feedback via Email Phone: 1.248.848.3800
Home > Tools > Frequently Asked Questions
Q. What are set-controlling admixtures? A. Set-controlling admixtures are used to modify the time of setting (ACI 212.3R). Retarding admixtures extend the time of setting. They are used in hot weather to compensate for the effects of high temperature. Accelerating admixtures reduce the time of setting and accelerate early strength development. They are used in cold weather to compensate for the effects of low temperature. References: SP-1(02); ACI CT-23; E4-12; ACI 212.3R-16; SP-288; ASTM C494 Topics in Concrete: Admixture; Concrete Fundamentals; Cold Weather; Materials; Hot Weather
Q. What are set-controlling admixtures?
A. Set-controlling admixtures are used to modify the time of setting (ACI 212.3R). Retarding admixtures extend the time of setting. They are used in hot weather to compensate for the effects of high temperature. Accelerating admixtures reduce the time of setting and accelerate early strength development. They are used in cold weather to compensate for the effects of low temperature.
References: SP-1(02); ACI CT-23; E4-12; ACI 212.3R-16; SP-288; ASTM C494
Topics in Concrete: Admixture; Concrete Fundamentals; Cold Weather; Materials; Hot Weather
Search other resources on the ACI website for answers to technical questions