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.

Properties of modified high permeable concrete with a crumb rubber

Abstract: High permeable concrete is designed with high porosity, which allows water to pass through it. By considering this ability, it has been widely used for various applications including high permeable road pavement. However, to fully adopt highly permeable road pavement technology is challenging due to high cost and maintenance, besides the present engineers and contractors have insufficient expertise and experience with this technology. Henceforth, the high porosity property is highly favorable for road curb applications especially in the tropical region like Malaysia with high rainfall intensity. This paper aimed to determine the properties of the concrete experimentally, and propose the optimum mix design of high permeable concrete for road curb. The flow value and setting time of the cement paste were investigated. Next, the effects of the modified high permeable concrete with varying amount of crumb rubber on compressive strength, permeability and void ratio were also investigated. Results have revealed that the workability of the cement paste increases when the water-binder ratio and the amount of fly ash increase. Meanwhile, an increasing amount of cement ratio and crumb rubber lowers the flow value and consequently leads to lower void ratio and permeability. Besides, it has been found that the higher the compressive strength, the lower the void ratio and permeability of the concrete. The research findings support that using an optimum amount of cement replacement with crumb rubber as an additive may increase the performance a high permeable concrete. Herein, the results indicate that the mix design of the concrete studied has the potential to be applied onto the road curb.

Effect of aggregate size on properties of polypropylene and glass fibre-reinforced pervious concrete

Abstract: Pervious concrete remains a sustainable solution for effective water management in urban scenarios. Owing to the absence of fine aggregates, properties of pervious concrete rely much on the propert...

Study on the Properties of Pervious Concrete

Abstract: Pervious concrete is a form of lightweight porous concrete, obtained by eliminating the sand from the normal concrete mix. The advantages of this type of concrete are lower density, lower cost due to lower cement content, lower thermal conductivity, relatively low drying shrinkage, no segregation and capillary movement of water. It has better insulating characteristics than conventional concrete because of the presence of large voids. In the present study M20 pervious concrete is designed by ACI522R-10 design code. The effect of w/c ratio and aggregate size on the strength of pervious concrete are studied. The property of pervious concrete by replacing cement by fly ash is also studied. It is revealed that the compressive strength increases as the water/cement ratio decreases up to optimum w/c ratio and with increase in volume of paste. It is observed that cement can be effectively replaced by fly ash which reduces the cost of pervious concrete.

Concrete block for creating seaweed colony and seaweed reef

Abstract: PROBLEM TO BE SOLVED: To provide a seaweed colony creating concrete block enabling the effective adherence and growth of seaweeds under the surface of the sea, enabling the growth of a phytophagous animal such as abalone, top shell or sea urchin from its larva to a grown body, enabling the smooth cycling of the alternation of generations, and suitable for each generation, and to provide a seaweed reef thereof. SOLUTION: This concrete block has a double-layered structure 10 consisting of the upper part of porous concrete 1 and the lower part of ordinary concrete or a porous concrete whose concrete strength is increased. It enables the free adherence and growth of objective small-sized or large-sized seaweeds that the decay speed of the surface is controlled by adjusting the particle sizes of aggregates, and the compounding state of cement and mixing materials of the upper porous concrete.