EFFECTS OF AGGREGATE CONCEPTS ON THE WORKABILITY OF PERVIOUS CONCRETE

BIANTI SHEANON, LOJITAN (2019) EFFECTS OF AGGREGATE CONCEPTS ON THE WORKABILITY OF PERVIOUS CONCRETE. [Final Year Project Report] (Unpublished)

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Abstract

Pervious concrete is an agglomerated mass of paste-coated aggregates, or also known as nofine concrete or porous concrete. It is generally made up of Portland cement, coarse aggregate, little or no fine aggregate, admixtures and water. The reduction or removal of the fine aggregate from the aggregate matrix results in an open structure with interconnected pores that allows water to pass easily through. The main objectives of this study are to investigate the effects of aggregate concepts on the workability of pervious concrete and to determine which kind of aggregate concept is best applied on pervious concrete for its optimum workability. The study is conducted through two types of lab experiments such as the inverted slump cone test and mouldability test that was recommended from Tennis et al. (2004), by forming a ball with the hand. The lab experiments are done by testing three shapes of aggregates which are angular, flaky and irregular with each shapes are further tested in different sizes of aggregates that are retained between pair of sieves of 20 mm to 14 mm, 14 mm to 10 mm, and 10 mm to 6.5 mm. The outcome of this study shows that aggregates with irregular shapes with sizes of aggregate that are retained between 14 mm to 10 mm pair of sieves is best applied on pervious concrete for its optimum workability.

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