Amirkabir Journal of Civil Engineering

Amirkabir Journal of Civil Engineering

The effect of Minoodasht region calcined clay of Golestan province and silica fume on the mechanical properties of concrete

Document Type : Research Article

Authors
Hassan Ghezelsofla 1
Amir Tarighat 2
1 faculty of Civil Engineering, shahid rajaee teacher training university
2 faculti of civil engineering shahid rajaee university of tehran
10.22060/ceej.2024.22611.8005
Abstract
In this research, calcined clay was used as pozzolan, first the soil was heated to 700 degrees Celsius to be calcined, then it was replaced with cement with lime powder. In this research, 10 mixed designs were used in 2 ratios of w/c, 0.35, and 0.4. In each proportion of clay at 0, 10, and 20%, limestone powder at 0, 30, and 20%, respectively, and microsilica along with the combination of soil and lime at 0 and 7% by weight as powder materials were replaced by cement. To check the properties of the prepared soil, XRF and XRD tests were performed on it. To investigate and analyze the mechanical properties of concrete from compressive strength tests on 10 cm cube samples at 4 ages of 3, 7, 28, and 90 days, tensile strength on cylindrical samples and flexural strength on prismatic samples at 28 years of age. Fasting was used. Over time and reaching the age of 90 days, designs containing 20% calcined clay and 20% lime Mix3 and Mix8 have more resistance in pozzolanic designs and are introduced as optimal pozzolanic designs.
 
Keywords
Calcined Clay
Pozzolan
Compressive Strength
Tensile Strength
Bending Strength
Subjects
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Amirkabir Journal of Civil Engineering
Volume 56, Issue 11
2025
Pages 1369-1386