Impact of Substitute Portland Cement with CKD on the Mechanical and Durability Characteristics of Cement Mortar

Duaa Al-Faluji,Mustafa S Abdulraheem,Mohammed Salah Nasr,Ali A Shubbar,Zainab S Al-Khafaji,Ahmed Alkhayyat,Muna M Al-Rubaye

doi:10.1088/1757-899x/1090/1/012035

Abstract

Cement mortar is a binding material that is made of cement, sand and water. In general, mixes of mortar are made of raw materials. However, using raw materials in producing mortar leads to many environmental and economic issues. One of the most common solutions to reduce these issues is replacing raw materials by waste and/or by-product materials; especially replacing cement. The aim of this research is to explore the characteristics of mortar mixes after partially replacing Ordinary Portland Cement (OPC) by Cement Kiln Dust (CKD) at three percentages (10%, 20% and 30%) in terms of initial and final setting time, compressive strength and Ultrasonic Pulse Velocity (UPV). The control mortar specimen (mortar containing OPC only) results were adopted for comparison with results of mortar mixes that incorporated CKD. Results showed that increment in CKD replacement percentages led to a decrement in the compressive strength and UPV and an increment in the setting time.

Highlights

Mortar is made of raw materials of
The aim of this research is to explore the characteristics of mortar mixes after partially replacing Ordinary Portland Cement (OPC) by Cement Kiln Dust (CKD) at three percentages (10%, 20% and 30%) in terms of initial and final setting time, compressive strength and Ultrasonic Pulse Velocity (UPV)
The final and initial setting time expand with increasing replacement percentage of OPC by CKD

Summary

Introduction

Mortar is made of raw materials of (cement, sand and water). It has a flowable and workable behaviour, so it could be utilised in binding, plastering and pointing [1]. The quantity of the released carbon dioxide from producing 1 tonne of Portland cement is estimated to be 1 tonne. This amount of carbon dioxide represents about 7% of global production [12,13,14,15,16,17,18,19,20,21]. The limestone calcination contributes to about a little over half of the CO2 quantity, while the used fuel to raise the temperature of the cement kiln to the required level contributes around third of the CO2 quantity

Objectives

Results

Conclusion