Topic
Pervious concrete
About: Pervious concrete is a research topic. Over the lifetime, 2920 publications have been published within this topic receiving 27720 citations. The topic is also known as: porous concrete & permeable concrete.
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TL;DR: In this paper, a uniaxial compression test was carried out to evaluate the damage and discuss the failure mechanism of porous concrete, and the changes in acoustic emission (AE) counts and energy were analyzed.
35 citations
19 Oct 2011
TL;DR: Gajanan M. Sabnis Sustainability in the Cement Industries and Chemical Admixtures Thomas B. Carter as discussed by the authors The Principles of Sustainable Building Design N. Subramanian and G. Gajanan Sabnis.
Abstract: Introduction Gajanan M. Sabnis Sustainability in the Cement Industries and Chemical Admixtures Thomas B. Carter The Principles of Sustainable Building Design N. Subramanian Sustainability through Thermal Mass of Concrete William Juhl Concrete Pavements and Sustainability Thomas J. Van Dam and Peter Taylor Roller Compacted Concrete Pavements: A Sustainable Alternative Chetan Hazaree Pervious Concrete for Sustainable Development Karthik H. Obla and Gajanan Sabnis Heat Island Effects Pushpa Devanathan and Kolialum Devanathan Future Sustainable City: The Case of Masdar City Gajanan M. Sabnis Sustainability and Rehabilitation of Concrete Structures Gopal Rai Global Sustainability and Concrete Edward J. Martin Index
35 citations
TL;DR: In this paper, the authors reveal the mechanical performance and permeability of pervious concrete with regard to volume fraction of the binder, type of binder (cement paste and styrene-butadiene latex modified paste), and aggregate to cement ratio.
Abstract: This paper investigates recycled aggregate (RA) obtained from construction waste, with a particular focus on the properties of pervious concrete. The authors reveal the mechanical performance and permeability of pervious concrete with regard to volume fraction of the binder (binder/voids between aggregate), type of binder (cement paste and styrene-butadiene latex modified paste), particle size of aggregate, and aggregate to cement ratio. The three nominal diameters of the aggregate were 3.6 mm, 7.2 mm and 11.1 mm. The volume fraction of the binder ranged between 0.3 and 0.5, by varying the nominal diameter of the aggregate. The authors designed and cast concrete specimens with water to binder ratios (w/b) of 0.35. The authors conducted laboratory testing of mixture proportions for various properties, such as workability, unit weight, compressive strength, flexural strength, porosity and permeability. The results show that mechanical strength decreases as permeability increases. Decreasing the aggregate to the cement ratio enhances mechanical strength but may reduce permeability, and styrene-butadiene latex greatly enhances flexural strength. From an economic point of view, the authors' recommendation to achieve optimal strength and permeability in pervious concrete using recycled coarse aggregate is: w/b=0.35, nominal diameter of 11.1 mm for the recycled aggregate; the volume fraction of 0.5 for the binder; and aggregate to cement ratio of 3.9. The permeability coefficient for the above mentioned mix was 0.33 cm/sec with the 28-day compressive strength and flexural strength reaching 12.6 MPa and 2.1 MPa, respectively. The mixture for RA pervious concrete developed in this study satisfies the typical requirement for concrete sidewalks and is thus applicable for civic paving projects.
35 citations
TL;DR: In this paper, the aggregate type and size and mineral admixtures are important factors influencing the permeability and the compressive strength of pervious concrete, and the optimum porosity and w/c for perviouscrete with both dolerite and granite are 18% and 0.25, respectively.
35 citations
TL;DR: In this article, the authors evaluated the resistance of pervious concrete to degradation during freeze-thaw cycling under different soil clogging and water saturation conditions, and found that specimens that were clogged with soil or completely submerged in water, or both, were damaged at a significantly faster rate than those specimens that remained unclogged and unsaturated.
Abstract: The objective of this research was to evaluate the resistance of pervious concrete to degradation during freeze-thaw cycling under different soil clogging and water saturation conditions. Laboratory testing of freeze- thaw durability involved two levels of soil clogging and two water saturation conditions in a full-factorial experimental design, and field testing involved measurements of stiffness and compressive strength on clogged and unclogged locations of an experimental pervious concrete slab placed in northern Utah. Both experimental factors, together with their interaction, were determined to be statistically significant in this research. Specimens that were clogged with soil or completely submerged in water, or both, were damaged at a significantly faster rate than those specimens that remained unclogged and unsaturated. The average number of freeze-thaw cycles to failure was 93 for clogged specimens compared with 180 for unclogged specimens, and 80 for saturated specimens compared with 193 for un...
35 citations