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, the authors imitate the bone self healing process by putting porous concrete internally in the concrete structure to create a porous network similar to "spongious bone" to fill up voids and seal cracks.
Abstract: To repair concrete cracks in difficult or dangerous conditions such as underground structures or hazardous liquid containers, self healing mechanism is a promising alternative method. This research aims to imitate the bone self healing process by putting porous concrete internally in the concrete structure to create a porous network similar to ‘spongious bone’. When cracks are formed and detected by sensors, healing agent can be infused into the porous network so as to fill up voids and seal a crack or cracks in the concrete body. This idea was tested using cylindrical and beam samples. A porous concrete core was placed in the concrete specimens. Uniaxial tensile load in the case of the cylindrical samples and bending load in case of beams was applied to create cracks. A healing action was performed by injecting healing agent manually. The results show that a macro-crack is sealed and strength of concrete is regained. Therefore, the concept is considered as to be feasible for self repair mechanism in concrete.
67 citations
TL;DR: In this article, coal bottom ash was used as a coarse aggregate and geopolymer as a binder, and a significant correlation was observed among the paste thickness, measured total void ratio and compressive strength.
67 citations
TL;DR: In this paper, it is postulated that the interconnected porosity may cause a serious reduction in strength, and it is assumed that porosity is correlated with high water permeability.
Abstract: Pervious concrete needs to have many pores to achieve high water permeability, but excessive porosity may cause a serious reduction in strength. Herein, it is postulated that the interconnected por...
67 citations
TL;DR: In this paper, an open-ended coaxial probe was used for the non-destructive measurement of the dielectric properties of concrete, and the probe was calibrated using measurements on saline solutions in conjunction with three different mathematical techniques.
Abstract: The subject of this paper is the design and calibration of an open-ended coaxial probe for the nondestructive measurement of the dielectric properties of concrete. Measurements are made between 100-900 MHz, frequencies which are often used in geophysics and civil engineering for ground penetrating radar inspection. The probe is calibrated using measurements on saline solutions in conjunction with three different mathematical techniques for comparative study. Measurements of mortar and concrete specimens having different water/cement ratios were made in order to observe the standard deviations due to their heterogeneous nature. Similar to the case of relatively homogeneous rock specimens (limestone and granite), the standard deviation for heterogeneous concrete samples do not exceed 5%. In addition, the effect of the concrete's porosity on its dielectric properties was clearly observed: measured permittivity between 4-4.5 at 900 MHz for porous concrete, and between 6.5-7.5 at 900 MHz for dense concrete.
66 citations
TL;DR: In this article, the effect of NaOH concentration, partial replacement of FA with ordinary Portland cement (OPC), and curing temperature on the properties of pervious geopolymer concrete (PGC) were investigated.
66 citations