تاريخ مجلس الدراسات العليا

2023-02-05

اسم الطالب

مصطفى محمد عبدالرزاق النسور

ملخص الرسالة

Pervious concrete is anew and high porous concrete that water passes throw it typically describes a near zero-slump and open graded. Used as a parking lot pavement, pedestrian walkways, bike lanes, roads, pools and playgrounds and locations where concrete compressive strength is not critical. Achieving a pervious concrete with appropriate physical and mechanical properties used in pavement. .When transporting concrete and delaying its arrival to the site, the mixing time exceeds the allotted time.So we will discusses the effects of time mixes at different times (0, 45 and90) minutes with a constant percentage of silica fume which is 5% of the weight of the cement. Mixing time of the pervious concrete less than the ordinary concrete. Therefore, it is necessary to study the effect of time on pervious concrete. With increasing mixing time a gradual increase in density, compressive strength and flexural strength was observed and a decrease in the permeability and porosity value. The concerned properties are as follows: hardened density, hardened voids content, water permeability, compressive strength and flexural strength. Keywords: Pervious Concrete, Silica Fume, Mixing Time, Compressive Strength, Flexural Strength, Workability, Permeability, Porosity and Density.