Masters Thesis

Effect of temperature cycles on the durability of pervious concrete with fly ash

Pervious concrete is a special type of concrete with a high porosity which contains very few or no fine aggregates. It is also known as Porous or Permeable Concrete. Pervious Concrete is distinguished as a best management practice (BMP) as it allows percolation of water from precipitation which helps in reducing storm water runoff and helps to lower the storm water pollution. Pervious concrete is designed to be used as paving as well as storm water mitigation structure. Despite its advantages, improvement and significant research; studies show that its performance at different weathering condition is limited. Use of pervious concrete is limited to areas with low traffic volumes, such as walkways, residential streets and parking lots whereas pervious concrete with higher strength will be a better alternative to high traffic concrete roads and also will help in seeping more water through the surface to the base layer. Despite of the advantages and innovative researches performed on pervious concrete, its response to temperature variation cycles is limited. In addition to that, limited research has previously been conducted to evaluate the effect of heat-cold cycles on the durability of pervious concrete. Vulnerability to heat-cold atmospheric changes has prompted uncertainty about its long-term performance. The purpose of this research is to achieve higher strength compare to traditional pervious concrete without jeopardizing its significant properties and determine the effect of Fresno's temperature variations on the durability of Pervious Concrete by replicating field conditions. To achieve higher strength without compromising permeability and void content, a mix is recast by replacing a portion of Portland cement with recycled cementitious material Fly Ash. The use of Fly Ash in a mix not only helps to gain strength but also promotes sustainability. Additionally, to determine the effect of temperature changes on the durability of Pervious concrete, it underwent an advanced field representative testing procedure for heat-cold and freeze-thaw temperature variation cycles.

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