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. How does the grading of the aggregates affect the strength of concrete? A. When the w/cm is the same and the mixtures are plastic and workable, considerable changes in grading will not have a large effect on concrete strength. The principal effect of changing the aggregate grading is to change the amount of cementitious material and water needed to make the mixture workable with the desired w/cm. References: SP-1(02); E-1(16); ACI 221R-96; ACI 213R-14; ACI PRC-211.1-22; ACI 211.4R-08; ASTM C33 Topics in Concrete: Aggregate; Concrete Fundamentals; Materials; Mixture Proportioning
Q. How does the grading of the aggregates affect the strength of concrete?
A. When the w/cm is the same and the mixtures are plastic and workable, considerable changes in grading will not have a large effect on concrete strength. The principal effect of changing the aggregate grading is to change the amount of cementitious material and water needed to make the mixture workable with the desired w/cm.
References: SP-1(02); E-1(16); ACI 221R-96; ACI 213R-14; ACI PRC-211.1-22; ACI 211.4R-08; ASTM C33
Topics in Concrete: Aggregate; Concrete Fundamentals; Materials; Mixture Proportioning
Search other resources on the ACI website for answers to technical questions