Insights and challenges of predicting concrete pumpability: A state-of-art review

Abstract

Concrete pumping technology is the most widely used method for concrete construction. To avoid the issues of segregation and pipe blockage etc., this technology necessitates superior pumpability of concrete and scientific inspection to evaluate its properties, and feasible pressure prediction methods to achieve request pressure. Despite the extensive research carried out by scholars over the decades, persistent challenges in concrete pumping still require further investigation. Thus, a comprehensive overview of the research on concrete pumping behavior, together with relevant test and simulation methodologies, especially the formation mechanisms and properties of the lubrication layer, is provided in this article, along with a summary of some of the challenges. First, the flow behavior of different types of concrete in the pipeline is discussed and distinguished. Subsequently, evaluation models for concrete pumpability and theoretical and empirical predictions of pumping pressure are presented. Furthermore, this paper also reviews the lubrication layer's formation mechanisms, and mesoscopic properties, such as its thickness, and interface rheological properties. This paper outlines the principles and applications of experimental testing methods and numerical simulation techniques frequently employed in concrete pumping research. These methodologies have proven instrumental in studying the complex dynamics of concrete flow through pipelines and predicting pumping performance. Finally, the challenges faced in concrete pumping research prospect in this paper, are vital to enhance concrete pumping efficiency, reduce material waste, and ensure the safe implementation of concrete pumping technology in construction projects.