Recycling of cement kiln dust from cement plants to improve mechanical properties of road pavement base course

IF 0.5 Q4 CONSTRUCTION & BUILDING TECHNOLOGY

Roads and Bridges-Drogi i Mosty Pub Date : 2020-09-30 DOI:10.7409/RABDIM.020.013

A. Ghrair, Nawal Louzi

引用次数: 1

Abstract

In the study, the potential of reuse of cement kiln dust (CKD) to improve the stability properties of the base course of road pavements was investigated. CKD was characterized chemically and physically. The results revealed that addition of CKD improved the mechanical properties of the base course significantly. The results showed a significant increase in California Bearing Ratio, from 234.5% measured for untreated base to 334.4%, 362.7% and 384.6% for CKD content of 5%, 15% and 25%, respectively. In terms of chemical composition, CKD is similar to cement. Scanning electron microscope images showed that the average particle size is approximately 0.5 microns. The granules are mainly spherically shaped, with cubic crystals of sodium and potassium salts. The leachability study of CKD in the base course revealed that heavy metal concentrations in CKD are fixed and insoluble in water.

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回收水泥厂水泥窑粉尘，改善路面基层力学性能

在研究中，探讨了水泥窑灰(CKD)的再利用对改善路面基层稳定性的潜力。对CKD进行了化学和物理表征。结果表明，CKD的加入显著改善了基层的力学性能。结果表明，当CKD含量为5%、15%和25%时，加州承载比分别从未经处理的234.5%提高到334.4%、362.7%和384.6%。在化学成分上，CKD与水泥相似。扫描电镜图像显示，平均粒径约为0.5微米。颗粒主要呈球形，含有钠盐和钾盐的立方晶体。CKD基层的浸出性研究表明，CKD中的重金属浓度是固定的，不溶于水。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Roads and Bridges-Drogi i Mosty CONSTRUCTION & BUILDING TECHNOLOGY-

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： The quarterly journal Roads and Bridges – Drogi i Mosty is published by the Road and Bridge Research Institute since September 2012 as a bilingual English-Polish journal. From 2002 to 2012 the journal was printed under the title Drogi i Mosty. The journal mission is to promote current achievements in science and technology in the field of road and bridge engineering. The journal is intended as a forum of the exchange of innovative concepts and solutions between the researches from different countries. Original scientific and technical papers in the field of civil engineering and related engineering sciences are published. The scope of Roads and Bridges – Drogi i Mosty includes design, construction, maintenance and safe use of roads, bridges, airports and other transportation structures.