EFFECT OF PRE-IMPREGNATED CARBONIZED AGGREGATE ON CARBONIZATION RESISTANCE OF FULLY RECYCLED CONCRETE

IF 0.6 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS

Ceramics-silikaty Pub Date : 2023-05-15 DOI:10.13168/cs.2023.0019

Yahong Ding

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引用次数: 1

Abstract

In order to investigate the effect of treated recycled aggregates by pre-soaking calcium hydroxide (CH) combined with CO 2 curing on the carbonation resistance of fully recycled concrete. The carbonation depth of fully recycled concrete was tested at 3, 7, 14 and 28 days using the rapid carbonation method. The experimental results show that with the recycled aggregate replacement rate rising, the carbonation resistance of fully recycled concrete gradually decreases. CH pretreatment combined with CO 2 curing effectively improves the quality of the recycled aggregate, thereby improving the carbonation resistance of fully recycled concrete. The optimum effect of CO 2 curing on fully recycled concrete is achieved with the recycled fine aggregate replacement rate of 70 % and the recycled coarse aggregate replacement rate of 100 %. In addition, microscopic tests were used to reveal the enhancement mechanism of CH pretreatment combined with CO 2 curing increases the carbonation resistance of fully recycled concrete. Experimental data were used to fit and model the carbonation depth of fully recycled concrete formulated before and after CO 2 curing of recycled aggregates.

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预浸渍碳化骨料对全再生混凝土抗碳化性能的影响

为了研究预浸氢氧化钙(CH)结合co2养护处理过的再生骨料对全再生混凝土抗碳化性能的影响。采用快速碳化法对全再生混凝土在第3、7、14、28天的碳化深度进行了测试。试验结果表明，随着再生骨料替代率的提高，全再生混凝土的抗碳化性能逐渐降低。CH预处理结合co2养护有效地提高了再生骨料的质量，从而提高了全再生混凝土的抗碳化性能。co2养护对全再生混凝土的最佳效果是再生细骨料替代率为70%，再生粗骨料替代率为100%。此外，通过细观试验揭示了CH预处理与co2养护联合提高全再生混凝土抗碳化性能的增强机理。利用实验数据对再生骨料co2养护前后配制的全再生混凝土的碳化深度进行拟合和建模。

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来源期刊

Ceramics-silikaty 工程技术-材料科学：硅酸盐

CiteScore

1.40

自引率

11.10%

发文量

审稿时长

5.5 months

期刊介绍： The journal Ceramics-Silikáty accepts papers concerned with the following ranges of material science: Chemistry and physics of ceramics and glasses Theoretical principles of their engineering including computing methods Advanced technologies in the production of starting materials, glasses and ceramics Properties and applications of modern materials Special analytical procedures Engineering ceramic including composites Glass and ceramics for electronics and optoelectronics High temperature superconducting materials Materials based on cement or other inorganic binders Materials for biological application Advanced inorganic glasses with special properties Fibrous materials Coatings and films based on inorganic non-metallic materials.