Influence of Limestone Fillers on the Properties of Concrete

Introduction

The flow spreads of the mortars were determined using the mini-slump test. The flow spread was obtained by measuring the difference between the perpendicular diameters of the base of the specimen and that of the mould. The process was repeated three times and the average flow spread was calculated.

 

Procedure

The mortar flow test utilizes a specially designed table that repeatedly raises and drops a known quantity of mortar 25 times. During the test, the mortar will spread or flow to form a circular mass, and the diameter of the mass is measured and compared to the initial size. The increase in size is expressed as a percentage of the initial size; for most mortars the required flow is 110%. The flow test was repeated three times and an average flow was calculated. The pictures on the right illustrates the steps involved in the test.