摘要：
The rheological parameters of Fresh SCC were examined through the theory of rheology, the rheological model of Fresh SCC was assumed to be H-B rheological model, the flowing time T-i' of Fresh SCC in the simulated L-box through Fluent, later compared with the flowing time T-i of Fresh SCC in the actual L-box, the target function was established according to the least square method, three rheological parameters tau(0), k and n were optimized performing the pattern search method, and 6 sets of rheological parameters of tau(0), k and n acquired from the back analysis underwent the V-funnel verification test, which demonstrates the feasibility to back-analyze the H-B model rheological parameters to some extent.
作者机构：
[丁德馨; 石建军] School of Resources and Safety Engineering, Central South University, Changsha, 410083, China;[张志恒; 丁德馨; 栗建新; 石建军; 刘华良; 刘权] School of Urban Construction, University of South China, Hengyang, 421001, China
通讯机构：
School of Resources and Safety Engineering, Central South University, Changsha, China
作者机构：
[Song, Xue; Shi, Jianjun; Chen, Zhaoyu; Song, X] Univ South China, Sch Urban Construct, Hengyang, Hunan, Peoples R China.
会议名称：
International Conference on Architectural, Civil and Hydraulics Engineering (ICACHE)
会议时间：
NOV 28-29, 2015
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Song, Xue;Shi, Jianjun;Chen, Zhaoyu] Univ South China, Sch Urban Construct, Hengyang, Hunan, Peoples R China.
会议论文集名称：
AER-Advances in Engineering Research
关键词：
Waste cathode ray tube glass;Alkali-aggregate reaction;Accelerated Mortar Bar Test;Fly ash
摘要：
With finely ground waste cathode ray tube glass sand, respectively replace 20%, 40%, 60% the proportion of ordinary sand in mortar, fly ash as mineral admixture in 0%, 10%, 20%, 30% the proportion of replacing cement. A total of 12 sets of mortar specimens were prepared. Use Accelerated Mortar Bar Test (ASTM1260) to measure mortar specimens alkali aggregate reaction expansion at 3D, 7D, 14D, 28D. The results show that: CRT glass is an alkali active substance, expansion will become larger with the increase of CRT glass content in the mortar specimen. Fly ash can restrain CRT glass mortar ASR expansion, all adding fly ash specimens 14D expansion rate is less than 0.1%, the swelling degree of restraint increases with the fly ash, ash up to 20% when we have been able to significantly restrain the expansion.
期刊：
Applied Mechanics and Materials,2012年204-208:3776-3781 ISSN：1660-9336
通讯作者：
Wu, Xianlei
作者机构：
[Shi, Jianjun; Shan, Zhi; Wu, Xianlei] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
通讯机构：
[Wu, Xianlei] U;Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议名称：
International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2012)
会议时间：
AUG 10-12, 2012
会议地点：
Zhangjiajie, PEOPLES R CHINA
会议主办单位：
[Wu, Xianlei;Shi, Jianjun;Shan, Zhi] Univ South China, Sch Urban Construct, Hengyang 421001, Peoples R China.
会议论文集名称：
Applied Mechanics and Materials
关键词：
MATLAB image process technique;Rheological constants;SCC;V-Funnel
摘要：
This template is mainly about the analysis of mechanical property of SCC in a flow state in the V-Funnel. It aims to establish the testing formula of rheological constants by Engineering Fluid Mechanics, which can provide academic basis for V-Funnel test of SCC properties. MATLAB image process technique was introduced in the process which can greatly improve its precision and reliability. It can also provide a new train of thought to experimental data.
摘要：
Taking the heterogeneity character of concrete into account, this paper presents an equivalent probabilistic model for failure study of concrete in which the heterogeneity of concrete is considered by assuming that the material properties conform to the Weibull distribution law and by using mesoscale mesh of finite elements. The study is divided into three parts. In the first part, a spatial correlation length factor is developed into the Weibull distribution formula so that the spatial correlation of local continuity of material properties can be considered. The second part presents a series of numerical analyses for investigating the size effect of self-compacting concrete (SCC) based on the equivalent probabilistic model, and a comparison is made between the simulation results and compression test measurements for illustrating the size effect on uniaxial compression strength and failure pattern of the SCC concerned. It is shown that the numerical model can provide reasonable predictions in the analysis of the size effect of SCC. In the final part, as an engineering application of the presented model, the damage and fracture behavior of the Koyna gravity dam during the 1967 earthquake are analyzed. Influences of concrete parameters on the crack pattern and failure modes of the dam prototype during the event are discussed. DOI: 10.1061/(ASCE)MT.1943-5533.0000179. (C) 2011 American Society of Civil Engineers.
摘要：
The usual research method, on rheology of fresh self-compacting concrete, is that the regression models between rheological parameters and workability were established, and then the rheological test was operated to control fresh SCC. But, there is no rheometer used widely on site, already. So this paper developed an adaptive neuro-fuzzy inference approach of the back analysis of workability on fresh SCC rheology, and workability tests can be taken to inverse the rheological parameters, by adaptive neuro-fuzzy inference system. In order to check the correctness of this approach, a rheological problem of fresh SCC was solved by it, and the inversion results were in good agreement with the rheological parameters, and the predication accuracy of ANFIS models was quite sufficient to meet the engineering requirement.
