4. Test results of marble dust blended cement
4.1. Water requirements and setting times
Fig. 3 shows the standard water requirement needed to produce
standard cement paste according to the E.S.S. 2421-1993. From this
figure it is observed that there is no obvious variance in water
requirements among samples made with marble dust modified cement
and the control (OPC) sample.
Initial and final setting times of plain and blended cement with
5.0%, 7.5%, 10.0% and 15.0% marble dust are given in Fig. 4. The initial
setting time must be greater than 45 min and the final setting
time must not exceed 10 h (600 min).
From this figure, it can be seen that there is no noticeable effect
occurred when using up to 15.0% marble dust as cement replacement.
Also, all of test specimens comply with the limits of E.S.S.
2421-1993.
4.2. Expansion of cement paste (Le Chatelier method)
Fig. 5 shows the measured expansions for marble dust blended
cement compared to plain cement. From this figure, it is found that
the expansion value is not so much affected by the replacement of
marble dust. Expansion values comply with the limits of E.S.S.
2421-1993,
4. Test results of marble dust blended cement4.1. Water requirements and setting timesFig. 3 shows the standard water requirement needed to producestandard cement paste according to the E.S.S. 2421-1993. From thisfigure it is observed that there is no obvious variance in waterrequirements among samples made with marble dust modified cementand the control (OPC) sample.Initial and final setting times of plain and blended cement with5.0%, 7.5%, 10.0% and 15.0% marble dust are given in Fig. 4. The initialsetting time must be greater than 45 min and the final settingtime must not exceed 10 h (600 min).From this figure, it can be seen that there is no noticeable effectoccurred when using up to 15.0% marble dust as cement replacement.Also, all of test specimens comply with the limits of E.S.S.2421-1993.4.2. Expansion of cement paste (Le Chatelier method)Fig. 5 shows the measured expansions for marble dust blendedcement compared to plain cement. From this figure, it is found thatthe expansion value is not so much affected by the replacement ofmarble dust. Expansion values comply with the limits of E.S.S.2421-1993,
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