The Use of Pulverised Fuel Ash in Lean Concrete Roadbases. Part 1. Laboratory Studies

摘要

This report describes the first part of a series of investigations to assess the potentialities of PFA for improving the properties of lean concrete roadbases. The work showed that by adjusting the proportions of PFA, cement and water an ash-modified lean concrete can be produced that will have strength properties comparable with those of normal lean concrete at any given age. However, the addition of PFA modifies the rate of gain of strength so that an ash-modified lean concrete does not completely emulate the properties of normal lean concrete. In general the addition of ash leads to lower early strengths and higher long term strengths than are obtained with normal lean concrete.