增强珊瑚骨料混凝土毛细吸水性能与预测模型

doi:10.11896/cldb.22010023

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Abstract Three types of coral aggregate concrete (CAC) were designed including fly ash CAC, silica fume CAC and slag CAC, fly ash CAC was used as a reference sample. The improved ASTM C1585 method was used to investigate the capillary water absorption characteristics of CAC at 28 d and 60 d. The influence of silica fume and slag on CAC capillary water absorption and porosity was analyzed, and the initial sorptivity prediction model was established. The results indicate that the incorporation of silica fume and slag significantly reduced the capillary water absorption of CAC, but the reducing effect on the capillary water absorption of CAC decreased with the increase of silica fume and slag content. With the increase of curing age, the decreasing effect of silica fume and slag on capillary water absorption is also weakened. At 28 d, the capillary water absorption of CAC containing 4% silica fume or 20% slag is the lowest;at 60 d, the capillary water absorption of CAC containing 6% silica fume or 20% slag is the lowest. In the entire water absorption stage, reduction effect of silica fume on the cumulative water absorption of CAC is greater than that of slag. Adding 4% silica fume or 20% slag can effectively reduce the porosity of CAC. At the same time, there is a good correlation between theoretical pore volume and secondary water absorption. The initial water absorption prediction model of CAC established by regression analysis can predict the initial water absorption rate of CAC with different content of silica fume and slag.

Key words： coral aggregate concrete (CAC) mineral admixture capillary water absorption sorptivity porosity

Published: 10 August 2023 Online: 2023-08-07

CLC number:

TU528.01

Fund:National Natural Science Foundation of China (51590914).

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	Articles by authors
	SU Li
	NIU Ditao
	HUANG Daguan
	ZHANG Yunsheng
	QIAO Hongxia

Cite this article:

SU Li,NIU Ditao,HUANG Daguan, et al. Capillary Water Absorption Properties and Prediction Model of Reinforced Coral Aggregate Concrete[J]. Materials Reports, 2023, 37(15): 22010023-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22010023 OR http://www.mater-rep.com/EN/Y2023/V37/I15/22010023

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