通过养护温度和石灰石的加入改善大体积粉煤灰砂浆的毛细吸水率

IF 1.4 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Cement Research Pub Date : 2023-07-27 DOI:10.1680/jadcr.23.00025

Yunfei Di, Haitao Zhao, Xiaoxiong Li, Yun Chen, Zhenqing Shi, Xiaolei Man

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引用次数: 0

摘要

研究了养护温度(20℃、40℃和60℃)和石灰石粉(LP)添加量(6%和12%)对大体积粉煤灰水泥砂浆毛细吸水率(CWA)的影响。进行了x射线衍射分析和化学结合水含量(CBWC)、抗压强度和孔隙率测试。结果表明，当粉煤灰(FA)含量超过30%时，CWA显著提高。当FA含量为50%、熟化温度提高到40℃或LP含量为12%时，CBWC显著提高。提高养护温度或添加LP均能提高HVFA水泥砂浆的抗压强度，降低孔隙率。水在HVFA水泥砂浆中的渗透深度预测与CWA结果一致。研究结果表明，提高养护温度或添加LP是提高HVFA水泥砂浆CWA性能的有效途径。

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Improving capillary water absorption of high-volume fly ash mortar by curing temperature and limestone addition

The effects of curing temperature (20°C, 40°C and 60°C) and the addition of limestone powder (LP) (6% and 12%) on the capillary water absorption (CWA) of high-volume fly ash (HVFA) cement mortar were investigated. X-ray diffraction analysis and tests for chemically bound water content (CBWC), compressive strength and porosity were also conducted. It was found that, for a fly ash (FA) content exceeding 30%, the CWA increased significantly. When the FA content was 50%, the curing temperature was raised to 40°C or the LP content was 12%, the CBWC increased greatly. Increasing the curing temperature or adding LP increased the compressive strength and decreased the porosity of the HVFA cement mortar. Prediction of the water penetration depth in the HVFA cement mortar was consistent with the CWA results. The results of this work indicate that an increase in curing temperature or the addition of LP could be an efficient way of improving the CWA performance of HVFA cement mortar.

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来源期刊

Advances in Cement Research 工程技术-材料科学：综合

CiteScore

3.70

自引率

5.00%

发文量

审稿时长

3.2 months

期刊介绍： Advances in Cement Research highlights the scientific ideas and innovations within the cutting-edge cement manufacture industry. It is a global journal with a scope encompassing cement manufacture and materials, properties and durability of cementitious materials and systems, hydration, interaction of cement with other materials, analysis and testing, special cements and applications.