Design and Research on Gradient Structure Concrete Based on Volumetric Stabilization

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Title: Design and Research on Gradient Structure Concrete Based on Volumetric Stabilization

Author(s): Xiao-Dong Wen, Bao-Guo Ma, Wei-Zhong Gan, and Zhi-Wei Xian

Publication: Materials Journal

Volume: 107

Issue: 6

Appears on pages(s): 612-618

Keywords: accelerated test; design; gradient; stabilization

Date: 11/1/2010

Abstract:
The gradient-structural design method of concrete due to underground concrete’s degradation characteristics was studied. The interlaminar deformation consistency was controlled to optimize the material, structure, and performance by means of interface mechanics. The accelerated test falls into two groups: one made to evaluate the swelling deformation value of the sample with a single-side exposed simulation environment and the other to characterize the environmental damage by the electric flux change. The gradient structure concrete (GSC) system is easily found to be much more stable based on the following evidence: 1) the swelling value of the GSC system declined by approximately 60 to 74% in 44 weeks; 2) the corrosion resistance coefficient K increased and the K210 value was still larger than 1, compared to that of a conventional single-layer structure system; and 3) the change in electric flux of the GSC system only increased from 149 to 252 coulomb (1 coulomb = 1A × sec.), whereas conventional single-layer structure systems increased noticeably from 1267 to 2728 coulomb.