Concrete pavement mixture design and analysis (MDA) : effect of aggregate systems on concrete mixture properties.
-
2012-07-01
-
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
-
Abstract:For years, specifications have focused on the water to cement ratio (w/cm) and strength of concrete, despite the majority of the volume
of a concrete mixture consisting of aggregate. An aggregate distribution of roughly 60% coarse aggregate and 40% fine aggregate,
regardless of gradation and availability of aggregates, has been used as the norm for a concrete pavement mixture. Efforts to reduce the
costs and improve sustainability of concrete mixtures have pushed owners to pay closer attention to mixtures with a well-graded
aggregate particle distribution. In general, workability has many different variables that are independent of gradation, such as paste
volume and viscosity, aggregate’s shape, and texture. A better understanding of how the properties of aggregates affect the workability
of concrete is needed.
The effects of aggregate characteristics on concrete properties, such as ability to be vibrated, strength, and resistivity, were investigated
using mixtures in which the paste content and the w/cm were held constant. The results showed the different aggregate proportions, the
maximum nominal aggregate sizes, and combinations of different aggregates all had an impact on the performance in the strength,
slump, and box test.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: