Degradation of the elastic modulus of cement-based grouting material with early ages after fire. (30th October 2018)

• Record Type: Journal Article
• Authors: Li, Qingtao; Liu, Lujie; Huang, Zhaohui; Yuan, Guanglin
• Is Part Of: Construction & building materials. Volume 187(2018)
• Page Start: 510
• Page End: 518
• Publication Date: 2018-10-30
• Subjects: Cement-based grouting material -- Curing age -- Water mixing ratio -- Elastic modulus -- Fire; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.07.232
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Study the degradation of the residual elastic modulus of CGM after fire. Investigate the influence of temperatures on the elastic modulus of CGM. Assess the influences of the parameters on the residual elastic modulus of CGM. Generate a set of valuable test data for the researches and structural engineers. Abstract: This paper presents a comprehensive experimental investigation on the degradation of the elastic modulus of cement-based grouting materials with different early curing ages after exposed to high temperature. The research focused on the influences of different temperatures, curing ages, water mixing ratio and cooling methods on the residual elastic modulus of the material. Test results indicate that the residual elastic modulus of cement-based grouting material reduces significantly after heating. The degradation of the residual elastic modulus of the material increases with increasing water mixing ratio. However, the influence of water mixing ratio is not very significant. The research indicates that the models proposed in Eurocode 2, the Chinese code and ACI-216 for normal concrete are not suitable to predict the degradation of the residual elastic modulus of cement-based grouting materials exposed to fire.