Advanced Materials Research Vols. 941-944

Abstract: On the basis of experimental research about PVA fiber concrete, combined with the technology measures such as expansive belt, construction quality monitoring, the jointless design and construction is successfully carried out for an industry tank. The water storage test results showed that impervious performances can meet the requirements of specification and achieved desired effects.

Abstract: Through the analysis of the possibilities of failure modes of RC short columns and advantages of outsourcing steel stick hair,put forward the method of reinforced concrete column strengthened with angle steel,and analyse its reinforcement effect through the experiment.

Abstract: A new design method to achieve the laminated Ti-Al-Mg composites by stack processing with magnesium alloy plate, aluminum powder, titanium mesh and vacuum hot-pressed sintered. Sintering laminated material in different sintering temperature. The microstructure, ingredient, structure of laminated material and the interface of Ti-Al, Mg-Al were analyzed by SEM and EDS. Test results show that the optimum sintering temperature is 550 ^oC, and after sintered the aluminum powder and magnesium alloy plate hang together relatively tight by slight interface reaction, and aluminum powder can able to better coating the titanium mesh within the matrix. Mechanical property test found that titanium mesh is role-playing the reinforcement in laminated material, and makes the mechanical properties of laminated material improving significantly.

Abstract: This article describes the engineering overview that using carbon fiber to reinforce the concrete beam of industrial building. The designing principles and methods, construction instructions and inspection strengthening quality are analyzed. Currently, the projects seem good in the practice. And the advancement and rationality of this reinforcement technology and design method are proved in the engineering application.

Abstract: This paper introduces the basic principle and structure of the Anti-condensation wall system in underground engineering, sets up the modeling of reliability for Anti-condensation wall system based on Markov process, which contains models of reliability for 5 different series repairable Anti-condensation unit and Parallel Anti-condensation structure. By analyzing the availability of example, this paper can provide some references to rational repair plan.

Abstract: The modern materials and technologies have an ability to provide a solution of the main goal of modern construction − maximum comfort. This article shows the implementation of comfortable building in a project of primary school. All the components of comfort have been taken under consideration: a rational space-planning, energy efficiency, acoustic isolation, air-tightness, daylight, fire safety, visual aesthetics. Special attention has been given to energy-efficiency: heat transfer coefficients have been calculated, optimal constructions have been selected, involving alternative methods of producing energy. The class of the building’s energy has also been determined. Economic benefits have also been described due to using renewable energy, area economy and so on. As a result, the concept of "comfort in all respects" have been revealed, recommendations on its implementation and further research in this area have been given.

Abstract: The effect of rice husk ash (RHA) on foam concrete was studied. Firstly, performance and application of foam concrete was introduced in this paper. Secondly the character of RHA was described. RHA contains about 90% amorphous silica, which has high pozzolanic activity. Partial replacement of cement by RHA can enhance the strength of foam concrete in later age and improve durability, homogeneity and corrosion resistance. It also improves the pore structure of foam concrete, thermal insulation and sound absorption performance. Finally, development of foam concrete mixed with RHA was analyzed from following aspects: selecting and processing materials such as foaming agents, RHA and cement; optimizing production process of foam concrete. And since RHA is the major agricultural by-products of rice, it can reduce cost and environmental impact by replacing cement in foam concrete. As an environment friendly material, foam concrete cooperating RHA has great potential in construction field.

Abstract: Calculation of payback periods of the energy saving actions directed on increase of level of thermal protection of external enclosure structures of buildings is given. Economic efficiency of investments in energy saving actions is analyzed and the model allowing to carry out the specified analysis is offered. Recommendations about reduction of payback periods are provided.Article also is devoted definition of optimum, economically well-founded thickness of a insulant in systems of rear ventilated facades. Are resulted thermotechnical and economic calculations. The optimum thickness of the insulant in the given systems is offered.A number of the energy saving actions is necessary for economy of thermal energy, allowing to eliminate defects of protecting designs or to reduce their influence on building heatconsumption. Construction of hinged ventilated facades at simultaneous introduction of automated individual thermal points with automatic equipment dependent on weather [1] can become an example of the engineering decision on increase of heat-shielding properties of protecting walls.

Abstract: To control the surface subsidence in shield tunnel construction, a DBN-based, parameters optimization method was proposed and applied to a tunnel project in Wuhan, China. Selected the construction parameters to optimize as network nodes and set discretizing rules to determine the nodes domain, then discretized monitoring data and applied them to parameter learning to obtain complete DBN model. This model was validated with engineering measured data , then applied it to determine the setting optimal operating-range of each parameters and within that optimized the parameters real-timely according to the monitoring data changing. The results show that this model can reflect the inner link between the surface subsidence and shield construction parameters and this DBN-based method can control the surface subsidence in shield tunnel construction effectively.

Abstract: The wide-use of automobiles in the modern society has made most of the urban bridges gradually changing into the fast lanes connecting riversides. The “lingering” function of bridge which belongs to the public open space weakens. Studying on the traditional characteristics of bridge settling spaces from three aspects of general city space, bridge connecting space and main space can provide the enlightenments for modern development.