Concrete mix design: Optimizing recycled asphalt pavement in Portland cement concrete

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-17 DOI:10.1016/j.conbuildmat.2024.139180

Jirayut Suebsuk , Suksun Horpibulsuk , Veena Phunpeng , Panupong Panpipat , Komkorn Chaidachatorn , Wunchock Kroehong , Rattapon Somna

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引用次数: 0

Abstract

In contemporary construction projects, there is a growing trend towards incorporating Recycled Asphalt Pavement (RAP) into Portland Cement Concrete (PCC). However, a significant challenge lies in formulating the mixture to achieve the desired strength for practical applications. This study delves into the influence of RAP on formulation of PCC mixtures. Conventional aggregates were systematically substituted with RAP at proportions of 25 %, 50 %, 75 %, and 100 % relative to the overall weight of the mixture. The study comprehensively analyzed various parameters throughout both the initial and solidified phases, encompassing modulus of elasticity, unit weight, workability, and compressive strength. The efficacy of PCC incorporating RAP can be standardized through the application of an extended water/cement ratio approach. Moreover, the key factors influencing the strength development of PCC containing RAP were identified as the residual water content after hardening (w_u) and the asphalt fraction weight percentage in the aggregate mixture (θ_AS). A straightforward and precise technique for designing the strength of PCC using RAP was suggested. This document presents the design criteria and suggestions for using PCC including RAP. The outcomes offer crucial insights regarding the utilization of RAP as a greener material in PCC applications on a substantial scale.

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混凝土混合设计：优化波特兰水泥混凝土中的再生沥青路面

在当代建筑项目中，将再生沥青路面（RAP）融入硅酸盐水泥混凝土（PCC）的趋势日益明显。然而，如何配制混合物以达到实际应用所需的强度是一项重大挑战。本研究探讨了 RAP 对 PCC 混合物配方的影响。系统地用 RAP 替代了传统的集料，比例分别为混合物总重量的 25%、50%、75% 和 100%。研究全面分析了初始阶段和凝固阶段的各种参数，包括弹性模量、单位重量、工作性和抗压强度。通过采用扩大水灰比的方法，可以规范掺入 RAP 的 PCC 的功效。此外，影响含有 RAP 的 PCC 强度发展的关键因素是硬化后的残余含水量（wu）和集料混合物中的沥青组分重量百分比（θAS）。本文提出了使用 RAP 的 PCC 强度设计的直接而精确的技术。本文介绍了使用含 RAP 的 PCC 的设计标准和建议。这些成果为在 PCC 大规模应用中使用 RAP 这种更环保的材料提供了重要的启示。

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

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.