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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. How do the surface texture and cleanness of the aggregate affect the strength of concrete? A. The adhesion of the cement paste to the aggregate particles is affected. The presence or absence of adherent soil or clay, the roughness, and the texture of the aggregate affect the adhesion. These characteristics have greater effect on flexural strength than on compressive strength. Soil affects the bond, and excessive fines increase the water demand, which could reduce the strength of concrete. References: SP-1(02); E-1(16); ACI 221R-96; ACI 213R-14; ASTM C33 Topics in Concrete: Aggregate; Concrete Fundamentals; Materials
Q. How do the surface texture and cleanness of the aggregate affect the strength of concrete?
A. The adhesion of the cement paste to the aggregate particles is affected. The presence or absence of adherent soil or clay, the roughness, and the texture of the aggregate affect the adhesion. These characteristics have greater effect on flexural strength than on compressive strength. Soil affects the bond, and excessive fines increase the water demand, which could reduce the strength of concrete.
References: SP-1(02); E-1(16); ACI 221R-96; ACI 213R-14; ASTM C33
Topics in Concrete: Aggregate; Concrete Fundamentals; Materials
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