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Huang W.,Huainan Union of University | Huang W.,Anhui University of Science and Technology | Ma Q.,Anhui University of Science and Technology
Advanced Materials Research | Year: 2011

Due to the easy cracking of shotcrete, shrinkage-compensating shotcrete is researched and its micro-structure and strength properties are analyzed. Firstly, cement slurry is made by CSA, accelerating agent and two different cements. When hydrated 3 days and 28 days, hydration products of cement slurry are analyzed by SEM and XRD in feature, crystal characteristics and mineral compositions. The compatibility of the two different cements and admixtures is studied in apparent characteristics, and the fact that Portland cement is more suitable for making shrinkage-compensating shotcrete is obtained. Then, mechanical properties of concrete which consists of Portland cement, expansive agent and steel fiber are did to analyze the influence of strength characteristics caused by mix amount of expansive agent and steel fiber. The results show that the compression strength and tensile strength of concrete improve with the increasing mix of steel fiber. Incorporation of the expansive agent is greater impact on concrete strength, when mix amount of expansive agent is 8%, strength properties are the best. When mix amount of steel fiber is 1.0% and expansive agent is 8%, the effect of cooperative enhancement is the best. © (2011) Trans Tech Publications. Source

He X.,Huainan Union of University | Xu G.,Anhui University of Science and Technology | Li Q.,Anhui University of Science and Technology
Advanced Materials Research | Year: 2012

The movement of aeration zone water is an important part of water cycle in natural. It promotes the precipitation, hydraulic contact of surface water and groundwater. But the change of the structure of vadose zone produce certain effect to its moisture movement, especially on reclaimed land is concerned, moisture in the air bag filling structure with sports have new features. This article through the indoor one dimensional vertical cylindrical tests, and the evaporation conditions with fly ash material 2 structure with water bag gas distribution, probes into the air bag with different profile of the moisture variation characteristics, analyzed the water movement, the mechanism of coal mine reclamation area for the field test, provides the basis. © (2012) Trans Tech Publications, Switzerland. Source

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