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
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: Nonlinear modelling of packing of aggregates of four sizes with fixed compaction effort
Author(s): Abhay Bulsari, Dr., Klaus Juvas
Appears on pages(s): 17-30
Keywords: Mix design, nonlinear modelling, aggregate packing
Abstract:Packing of particles of different sizes is of enhanced interest to concrete industries these days, particularly to be able to reduce cement consumption. It is not easy to mathematically describe the packing of particles of more than two different sizes, especially when the particle shape too might be difficult to describe. In the real world, each "size" or aggregate actually implies a particle size distribution which can be fairly wide, and overlapping with sizes of the other aggregates.In 2008, the authors presented a solution for packing of particles of three sizes, indicating how the minimum voidage can be calculated. Packing of particles of four sizes is more interesting from a scientific point of view, as well as from the industrial point of view. As this paper makes it clear, the optimal packing of particles of four sizes is at least as good as the optimal packing of three sizes, and usually better. This means that one can usually save more cement by optimally mixing particles of four sizes than by mixing only three sizes.It is difficult to develop physical models predicting the packing characteristics of particles of three or more sizes. Empirical modelling is a good approach if nonlinearities are taken into account. New techniques of nonlinear modelling, however, make this kind of model development feasible. From a limited amount of experimental data, one can develop nonlinear models of a good accuracy.This paper illustrates with an example how nonlinear models can describe sufficiently well the packing of aggregates of four sizes with a wide variation in their diameters.
Norwegian Concrete Association, International Partner Access.
View Resource »