Investigation of the Effects of Compaction on Compressive Strength and Porosity Characteristics of Pervious Concrete

Abstract

An experimental study was conducted to evaluate the effect of compaction layer configuration, effort, and blow pattern on compressive strength and porosity characteristics of pervious concrete. Distinct types of compactions were applied to pervious concrete mixes with aggregate-to-cement (A/C) ratios ranging from 2.5 to 7.0. The results obtained from the experimental study revealed that three-layer compaction improved compressive resistance significantly compared with single-layer. In contrast, reduction in porosity was observed in three-layer compaction. Overall, by optimizing compaction effort and A/C ratio in three-layer compaction, compressive strength and porosity could be improved to be in the ranges 20.0 MPa to 30.0 MPa and 15% to 35%, respectively. In the three-layer compaction configuration, blow patterns have been identified to influence compressive strength and porosity. Findings of the study recommend deploying an A/C ratio between 3.5 and 4.5 with three-layer compaction to cast pervious concrete that would produce elements with compressive strength and porosity ranging from 10.0 MPa to 25.0 MPa and from 11% to 30%, respectively.

Prediction of Characteristics of Pervious Concrete by Machine Learning Technique Using Mix Parameters and Non-destructive Test Measurements

“…A prior study examined the A/C ratio's effect on performance and packing, which concluded that 2.65 was the theoretically ideal amount for aggregates of 12 to 18 mm [72]. An ideal A/C of roughly 4.0 was noted in another investigation [72]. This study uses a mixed design with A/C ranging in 0.5 increments from 3.0 to 5.0 to investigate this range and its possible impact on performance.…”

“…An essential factor in pervious concrete is the A/C ratio, which usually ranges from 3.0 to 8.0 in the literature [71]. A prior study examined the A/C ratio's effect on performance and packing, which concluded that 2.65 was the theoretically ideal amount for aggregates of 12 to 18 mm [72]. An ideal A/C of roughly 4.0 was noted in another investigation [72].…”