Effect of various SCMs on the properties of mortar systems during steam and carbonation curing conditions

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

Construction and Building Materials Pub Date : 2025-06-12 DOI:10.1016/j.conbuildmat.2025.142141

Yizhe HeLian , Jiaxin Liao , Yonghui Zhang , Lexian Shi , Menghui Zhao , Hongwei Fang , Xiangming Kong

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引用次数: 0

Abstract

Carbonation curing of precast concrete components proposes a promising solution to increase the manufacturing efficiency and reduce the overall CO₂ emission of the concrete. In practical production, supplementary cementitious materials (SCMs) are frequently incorporated into precast concrete components. Despite this, the extent to which different SCMs modulate the carbonation curing process still remains unclear. This study employed quantitative methods to calculate the clinker consumption and product formation in various SCMs mortar systems under both steam and carbonation curing conditions, to elucidate the contribution of carbonation curing on different SCMs mortar systems. The results indicated that in comparison with steam curing, carbonation curing significantly enhanced the initial compressive and flexural strength of mortar, altered the timing and intensity of the primary hydration reactions, reduced the overall energy output during the early stages of cement hydration. The 7 h compressive strength of OPC was boosted by approximately 10–15 %, while the flexural strength increased by around 10–25 %. The XRD results showed that the CaCO₃ content in pastes containing FA, MS, GGBS, and CC was respectively 3.2 %, 5.2 %, 1.8 %, and 1.2 % higher than in steam curing, while this value in OPC was 3.7 %. TGA results revealed that the 10 % MS system exhibited the most significant increase in CaCO₃ content (∼7 %), when neglecting the contribution of amorphous calcium carbonate, which aligned with the quantitative results from XRD analysis. All these findings suggest that MS exhibited a synergistic effect with carbonation curing, significantly facilitated the initial strength of mortar.

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在蒸汽和碳化养护条件下，各种SCMs对砂浆体系性能的影响

预制混凝土构件的碳化固化提出了一种很有前途的解决方案，可以提高制造效率并减少混凝土的整体二氧化碳排放。在实际生产中，补充胶凝材料（scm）经常加入到预制混凝土组件中。尽管如此，不同的SCMs调节碳化固化过程的程度仍然不清楚。本研究采用定量方法计算了蒸汽养护和碳化养护两种条件下，各种SCMs砂浆体系的熟料消耗量和产物形成，阐明碳化养护对不同SCMs砂浆体系的贡献。结果表明：与蒸汽养护相比，碳化养护显著提高了砂浆的初始抗压强度和抗折强度，改变了水泥水化初期初级水化反应的时间和强度，降低了水泥水化初期的总能量输出。OPC的7 h抗压强度提高了约10-15 %，抗弯强度提高了约10-25 %。XRD结果表明，与蒸汽养护相比，FA、MS、GGBS、CC的CaCO3含量分别提高了3.2 %、5.2 %、1.8 %和1.2 %，而OPC的CaCO3含量为3.7 %。TGA结果显示，当忽略无定形碳酸钙的贡献时，10 % MS体系的CaCO3含量增加最为显著（~ 7 %），这与XRD分析的定量结果一致。这些结果表明，MS与碳化固化具有协同作用，显著提高砂浆的初始强度。

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.