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Study on Sulfate-attack of Slag-based Geopolymer Concrete Qing Wang1,a , Zhaoyang Ding1,b, Li lin2,c, Jing Da1,d and Zhitong Sui3,e 1School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang, 110168, China 2Department of Architecture and Civil Engineering, School SuQian College, SuQian, 223800,China 3School of Materials & Metallurgy, Northeastern University , Shenyang, 110004, China.
Introduction Geopolymer is a novel alkali-activated cementitious materials which use natural aluminum silicate mineral or industrial solid waste as the main raw materials.
In this paper slag and metakaolin were used as raw materials, geopolymer was prepared as cementitious material by alkali activator to produce geopolymer concrete.
Material and Experimental Method Raw Materials.
Durability of geopolymer materials in sodium and magnesium sulfate solutions [J].

Materials and Methods Materials and Reagent.
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Journal of Central South University of Forestry & Technology,2010,30(6):123-126
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Structural curvature mode can be derived from structural mode shape by the following steps: According to the basics of material mechanics, formula (1) can be gained:
The section is 26mm×10mm, the length is 3.00m, and the material is Q235 steel.
Journal of Sound and Vibration, 226 (2): 217-235
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[6] ZHAO Jun, CHEN Liang-yan, MA Hong-wei (2009), “The damage detection in the arch basing on the changes in curvature mode shape”, Journal of Jinan University.

Through this process the characters with lowerhardness, lower plastic deformation resistance and better processing plastic of the steel can get. the properties of this steel can meet the requirement of cold forming process for materials.
Then put forward higher requirements for the alloy materials to their softening process, and hope to change the organization performance and improve the plastic characteristics of alloy material through heat treatment.
Quenching can meet the first two requirements. therefore to achieve the performance of the materials required, this experiment adopt quenching and cyclic spheroidizing annealing process for38CrMoAl.
It is a project supported by Guizhou Social development and science technology research project (project number: 2012, NO.3097).
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Measuring the local properties (indentation hardness HIT, indentation modulus EIT, indentation energy: total Wtotal, elastic Welast, plastic Wplast) of each microstructure component separately in multiphase materials gives information that is valuable for the development of new materials and for modelling.
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Strength reliability, one of the key factors restricting wider use of composite materials in various applications, is commonly characterized by Weibull distribution function.
It has been proved that Weibull distribution is based on the weakest link model or series model which reflects the impact of material defects and source of stress concentration[1].Especially for a relatively small amount of data, Weibull distribution shows a relatively higher accuracy.
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The present method is performed using an evidence theory to quantify the uncertainty present in the structure’s parameters such as material properties.
For uncertainty representation, the UQ framework uses all possible obtained values of structural material constants provided by designer in constructing separate belief structures for material constants.
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The material of the sheet is mild steel, and the size is 1360 mm × 8 mm.
The change of temperature is very small during the roll-bending forming process, hence negligible, so that the material properties are independent of temperature.
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The analysis software “ABAQUS” is used for this purpose,the structral and material detailed in Table 1.
That means GFRP bars have been introduced as a promising alternative material to the traditional steel dowels.
Acknowledgments The work described in this paper was fully supported by the National Natural Science Foundation of China (Grant No: 50808058) and Science and Technology Program of Heilongjiang Province (Grant No: 2010T0013-00).
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