Page 4 - report P Lemoine feb 2013c

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1. INTRODUCTION

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The project follows from an earlier study at UU (FireSert report, Prof. F Ali, 12 October
2012) which has shown how, following the Fire test, the cement with RoadCem additive

Y improves its compressive strength (~ +13% gain).

As only two samples were tested for compressive strength in the FireSert report, the aim

of the present study is to carry out nanoindentation measurements to complement this

initial FireSert study. Nanoindentation also permits to obtain ‘local’ information which may
help elucidate structure/property relationships. To broaden the scope of the study,
cement samples without the RoadCem additive were also examined. A summary of the

samples description is shown in table 1.

Description of sample Sample name

Cement with RoadCem Y additive, as received Y asrec

Cement with RoadCem Y additive, Fire-tested under
Y fired
ISO834*
Cement with RoadCem Y additive, Subjected to Liquid
Y N2
Nitrogen*

Cement with RoadCem Y additive, Subjected to
Y acid
sulphuric acid.*

Cement without RoadCem Y additive, as received No Y asrec

Table 1: samples examined in this report
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*details of these tests are given in the FireSert report (Prof. F Ali, 12 October 2012)

The composition of the cement with RoadCem additive Y ( Y asrec) is given in annex A.
To carry out these nanoindentation measurements, we requested from PowerCem a
similar sample, without the roadCem Y additive. This sample (no Y asrec) was provided

by PowerCem, my understanding is that it was prepared as the Y asrec sample, only

‘without the additive’.

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