加速碳化养护透水混凝土的强度和渗透特性

IF 4.7 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Sustainable Cement-Based Materials Pub Date : 2023-05-24 DOI:10.1080/21650373.2023.2213241

G. Sidhu, Himanshu Guleria, D. Sharma, S. Goyal

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引用次数: 0

摘要

本研究旨在探讨加速碳化养护(ACC)对透水混凝土强度和渗透特性的影响。ACC很好地设想了混凝土中的二氧化碳封存。透水混凝土被认为是CO2养护的更好的接受者，因为存在高度互联的孔隙。与普通混凝土相比，透水混凝土的碳化更深、更均匀。试验结果表明，12 h加速碳化养护能有效提高透水混凝土的强度。此外，基于应用的互锁透水摊铺机砌块经过12小时的ACC，其最高强度为23.36 MPa。尽管由于CaCO3的形成导致了渗透性的降低，但在经过ACC处理的样品中，渗透特性处于最佳范围内。微观结构分析表明CaCO3和CSH凝胶混合基质。TGA显示ACC试件的CO2吸收量较高，持续时间较长，表明透水混凝土与常规混凝土相比具有CO2固存作用。

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Strength and permeation characteristics of pervious concrete subjected to accelerated carbonation curing

This study aims to investigate the influence of accelerated carbonation curing (ACC) on strength and permeation characteristics of pervious concrete. ACC envisaged well for CO2 sequestration in concrete. Pervious concrete is considered to be better recipient for CO2 curing due to presence of high interconnected pores. Carbonation of pervious concrete is deeper and homogeneous in comparison to normal concrete. Experimental results show that accelerated carbonation curing at 12-hour effectively improves strength of pervious concrete. Also, application-based interlocking pervious paver blocks subjected to 12-hour ACC provide the highest strength of 23.36 MPa. Permeation characteristics were found to be in optimum range despite of decrease in permeability due to the formation of CaCO3 in specimens subjected to ACC. Microstructural analysis also suggested intermingled matrix of CaCO3 and CSH gel. TGA revealed higher CO2 uptake for longer duration of ACC specimens, suggesting sequestration of CO2 in pervious concrete compare to conventional concrete.

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来源期刊

Journal of Sustainable Cement-Based Materials Multiple-

CiteScore

6.60

自引率

15.90%

发文量

期刊介绍： The Journal of Sustainable Cement-Based Materials aims to publish theoretical and applied researches on materials, products and structures that incorporate cement. The journal is a forum for discussion of research on manufacture, hydration and performance of cement-based materials; novel experimental techniques; the latest analytical and modelling methods; the examination and the diagnosis of real cement and concrete structures; and the potential for improved cement-based materials. The journal welcomes original research papers, major reviews, rapid communications and selected conference papers. The Journal of Sustainable Cement-Based Materials covers a wide range of topics within its subject category, including but are not limited to: • raw materials and manufacture of cement • mixing, rheology and hydration • admixtures • structural characteristics and performance of cement-based materials • characterisation techniques and modeling • use of fibre in cement based-materials • degradation and repair of cement-based materials • novel testing techniques and applications • waste management