Papers by Keyword: Curing Technology

Abstract: The effect of curing pressure, curing temperature and curing time on the mechanical properties of the adhesively bonded composite structure of CFRP and Al are studied by means of the Orthogonal Test. Indexed by the fatigue life of the composite structure of CFRP and Al in room temperature environment and by making the direct, variance and effect analysis for the test data, we have obtained the optimal curing technology scheme within the test range. Because the optimal scheme isn’t included in the orthogonal table, we make the point estimation in order to get the fatigue life corresponding to this scheme. At last, the fatigue life under the optimal scheme is obtained by adding a test, the result of which is consistent with that of the theoretical analysis.The effect of curing pressure, curing temperature and curing time on the mechanical properties of the adhesively bonded composite structure of CFRP and Al are studied by means of the Orthogonal Test. Indexed by the fatigue life of the composite structure of CFRP and Al in room temperature environment and by making the direct, variance and effect analysis for the test data, we have obtained the optimal curing technology scheme within the test range. Because the optimal scheme isn’t included in the orthogonal table, we make the point estimation in order to get the fatigue life corresponding to this scheme. At last, the fatigue life under the optimal scheme is obtained by adding a test, the result of which is consistent with that of the theoretical analysis.

Abstract: The analysis of material variables and curing procedure design are the key techniques of UHPCC. Material variables include cement-water ratio, silica fume content, sand’s content and size, filling powder’s content and type. Based on the objective of compressive strength, UHPCC with compressive strength 180MPa was developed based on the influence analysis of material variables on its performances and the substitution of silica fume by lime stone powder. By the analysis of the influences of early curing method, initial time, duration time and high temperature curing, curing procedure design was proposed, i.e. early water curing at first after 24 hours of casting and then high temperature steam curing. Based the simplified constitutive relation of UHPCC, the ultimate flexural of UHPCC hybrid girder was analyzed. This paper can be a basis of UHPCC-NC hybrid structure analysis.