基于NaOH激发矿渣和硅酸盐水泥的功能梯度混凝土的抗氯离子渗透性能

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Abstract NaOH activated slag (NAS) has excellent resistance to chloride ion penetration, while Portland cement (PC)has poor resistance to chloride ion penetration. Covering NAS mortar layer on the surface of PC concrete can significantly improve the chloride ion penetration resistance of functionally graded concrete (FGC). The chloride penetration depth of FGC and NAS concrete soaked in 10%NaCl (mass fraction, the same below) solution for 84 days are only about 11.0 mm and 12.7 mm respectively, while that of PC concrete is 36.7 mm. BET test shows that the vo-lume of pores and the most probable pore diameter in NAS mortar are much larger than that in PC mortar. XRD test results show that Friedel’s salt is formed in NAS mortar and PC mortar after soaking in 10%NaCl solution. The main reason why NAS mortar has better chloride penetration resistance than PC mortar is that the paste has greater physical adsorption on chloride ions rather than finer pore diameter.

Key words： functionally graded concrete(FGC) NaOH activated slag(NAS) Portland cement(PC) chloride penetration resistance pore diameter

Published: 05 June 2022 Online: 2022-06-08

CLC number:

TU528.1

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	ZHOU Wanliang
	DENG Huan

Cite this article:

ZHOU Wanliang,DENG Huan. Chloride Penetration Resistance of Functionally Graded Concrete Based on NaOH Activated Slag and Portland Cement[J]. Materials Reports, 2022, 36(Z1): 21100082-4.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2022/V36/IZ1/21100082

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