A review on durability and life prediction of FRP bars under different corrosive environments

doi:10.19491/j.issn.1001-9278.2022.03.013

Abstract

Abstract:

The durability of FRP in different corrosive environment has been widely concerned and studied. In this paper， the tensile properties of FRP bars such as aqueous solution immersion， salt solution erosion， acid solution， alkali solution， and freeze?thaw were analyzed comprehensively under different action media and modes， and their evolution law of tensile strength was summarized. Based on the degradation mechanism of tensile strength of FRP bars and the Arrhenius equation， the parameter characteristics of the prediction model and equation for the tensile strength life of FRP bars under different action modes were discussed.

Key words: fiber reinforced polymer bar, corrosion environment, mechanical property, durability, life prediction model

CLC Number:

TQ327

ZHANG Ting, JIN Qingping, SONG Shie, CAO Nannan, DENG Siyuan. A review on durability and life prediction of FRP bars under different corrosive environments[J]. China Plastics, 2022, 36(3): 75-81.

Figures/Tables 11

Fig.1. Retention of tensile strength of GFRP bars in aqueous solution［1?4］

Fig.2. Retention of tensile strength of GFRP bars in acid solution［3?7］

Fig.3. Retention of tensile strength of GFRP bars in salt solution［1?4， 6?9］

Fig.4. Retention of tensile strength of GFRP bars in salt solution［6?7，9］

Fig.5. Retention of tensile strength of BFRP bars in salt solution［7?9］

Fig.6. Retention of tensile strength of GFRP bars in aqueous solution coated with mortar［2， 8?13］

Fig.7. Retention of tensile strength of GFRP bars with different diameters in alkaline solution［7?9， 11?15］

Fig.8. Retention of tensile strength of GFRP bars under freeze?thaw cycles ［5， 8， 11］

Fig.9. Retention of tensile strength of bars under the coupling action of salt solution and stress［8， 16?23］

腐蚀溶液类型	GFRP筋直径/mm	温度/℃	y₀	A₁	R²
水溶液	—	25	20.89	-21.96	0.841 41
		50	99.02	-0.48	0.975 82
		80	76.79	23.27	0.989 1
盐溶液	—	25	88.027 2	11.942 3	0.930 15
		50	104.968 26	-5.164 45	0.930 15
		40	84.051 4	16.181 88	0.930 15
		60	66.802 22	32.818 01	0.930 15
		80	2.047 09×10¹⁵	-2.047 09×10¹⁵	0.930 15
酸性溶液	—	23	124.879 73	-25.256 36	0.933 91
		25	100.789 32	-1.240 72	0.987 78
		60	87.106 13	12.956 96	0.992 92
碱性溶液	12.7	25	67.333 33	32.666 67	0
	7	20	87.060 7	12.857 64	0.974 54
	7	60	78.688 93	21.290 74	0.996 68
	16	60	52.121 71	48.018 8	0.998 34
	16	40	67.185 11	32.868 94	0.999 08
	16	80	46.816 82	53.085 69	0.999 08

Tab.1. GFRP bar fitting curve results under the action of aqueous solution

Fig.10. Relationship between y0 and A1 at different temperature

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