Engineering Geology

Engineering Geology

Evaluation of the effectiveness of adding nanominerals to improve the engineering characteristics of concrete

Authors
Zahra Soleimani 1
Ebrahim Rahimi 2
Houshang Khairy 1
1 Damghan University
2 Shiraz University
10.22034/JEG.2024.18.1.1017883
Abstract
This article deals with the strength evaluation of concrete obtained by adding different percentages of three types of nanominerals, including nanocalcite, nanobarite and nanofluorite. To measure the velocity of ultrasonic waves and compressive strength of concrete, 15×15×15 cm cube samples were prepared with 7-, 28- and 90-days curing. 10 types of mix designs with 0.39 water-cement ratio, including the control sample (without additives) and the samples with 0.5, 0.75 and 1% nanominerals were subjected to the mentioned tests. The results showed that the addition of nanocalcite, nanofluorite, and nanobarite with values of 0.75%, 1%, and 0.75%, respectively, have the highest compressive strength compared to the control sample. Although these do not have pozzolanic properties, they play a positive role in increasing the concrete strength by filling concrete voids and due to their high specific gravity, increasing concrete density.
Keywords
compressive strength of concete
ultrasonic pulse velocity
nanomineral
nanobarite
nanoflorite
nanocalcite
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