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
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.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Chat with Us Online Now
Feedback via Email
Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Maximum Aggregate Size
on Compressive Strength of Concrete
Exposed to Evaporation Immediately
Author(s): Dan Ravina
Publication: Journal Proceedings
Appears on pages(s): 582-588
Keywords: aggregate size; aggregates: compressive strength; concretes; cracking (fracturing) : evaporation; fresh concretes: hot weather construction: microcracking: plastic shrinkage: research; tensile stress.
Abstract:The influence of maximum aggregate size on the compressive strength of concrete and microconcrete (sieved mortar), exposed to evaporation immediately after casting, was studied. The main variants were: (a) maximum aggregate size 1/4 in. (19.05 mm), 1/2 in. (12.5 mm), 3/8 in. (9.6 mm), 3/16 in. (4.8 mm); (b) time of exposure to evaporation- 0, 45, 90 and 300 min. Concrete and air temperature in the first 24 hr 30 C (86 F); initial rate of evaporation about I kg/m2/hr (0.2 Ib/sq ft/hr). It was found that the aggregate restrains the plastic shrinkage associated with drying. The resulting tensile stresses impair the properties of the concrete, as internal cracking and reduction in strength were observed. The larger the maximum aggregate size or aggregate content, the higher the internal cracking and the loss of strength after 5 hr exposure to evaporation: 21, 12 and 5 percent, for concretes with maximum aggregate size of 3/4, 1/2 and 3/8 in., respectively.
Click here to become an online Journal subscriber