Advanced Materials Research Vols. 1025-1026

Abstract: We have developed a low-noise drainage system, which was installed in bathrooms of apartment building units as well as in a mock-up test building, to evaluate the noise level in order to reduce the noise produced in the bathrooms of multiunit dwellings. The drainage system installed in the mock-up building consists of six types of detachable drains, and the level of noise produced during toilet use in the upper unit was measured in the lower unit. The measurement results showed that low-noise drainage 4 exhibited the L_eq (equivalent continuous sound level) at 34.7 dB(A). The noise measurement results of various types of low-noise drains installed in an apartment building showed that the L_eq during toilet use was 46.7 dB(A) on average, and the L_eq during sink use was 40.5 dB(A) on average.

Abstract: Supporting system of external suspension tower crane is the key factor which impairs the safety of the tower cranes. In this article, the problem is studied about the influence of different supporting point stiffness on the force of the tower crane external suspension. Based on the structural mechanics theory, the displacement of the lower statically indeterminate beam and the horizontal displacement of the upper statically indeterminate truss are solved firstly, then the stiffness of the supporting point on the lower beam and the entirety stiffness of the upper horizontal combination struts can be obtained. We can get the optimal supporting structure by drawing the relationship of stiffness1-stiffness2-force which is of significant to the external suspension’s design and installation in Matlab software.

Abstract: The behaviour of concrete elements under loads, hydrated process and several conditions is one of the actually problems on improvement of structures or elements of structures. In this paper we analyze the problem of cracking, such a result of loading and hardening process of concrete. One of the way for improvement is using the polypropylene fibres , and creating the composite materials In this case of studies we used experimental examinations of concrete slab, such a model, for - slab (referent model) - slab with different percent of fibres The most of comparing results are on comparing the effect of fibres in improvement of energy capacity of concrete elements, and following the crack situation, or decreasing the dimensions of cracks. One of the most important value based on the behavior of the structure is ductility. The ductility is a structural design requirement in most design codes. The traditional definition of ductility cannot be applied to composite structures, but will be analyzed on the increasing the dissipations of energy. Several methods are used on the analyzing of this problem and propose to calculate the absorption the energy in concrete slab and to analyze the positions of cracks.

Abstract: The ultra high performance concrete (UHPC) has very special properties that are expressively different of normal concrete. Due to its high compression strength greater than 150 MPa, tensile strength greater than 20 MPa and improved durability, these represent significant advances in concrete technology. These materials include Portland cement, silica fume, quartz flour, fine silica sand, high-range water-reducer, water and either steel or organic fibres. Depending on the type of fibres used can influence the compressive strength. The article describes the tests of frost resistance on UHPC plates with different types of textiles armatures. The aim of the testing is describe influence of textiles armatures in UHPC matrix in extreme conditions.

Abstract: With coverage of municipal transport network, more and more pedestrian bridges appeared in traffic dense areas of the city, thus well solving the security problems of pedestrians crossing the street. Although at this stage, for the construction of pedestrian bridges in practical engineering, the traditional reinforced concrete structure still occupied dominant position, a variety of new materials have also been more widely used. This paper mainly discusses the development of materials used in pedestrian bridges.

Abstract: Inner climbing tower crane supporting system itself is statically indeterminate structure. This paper would use the force method of structural mechanics to solve this kind of statically indeterminate problem. Through the MATLAB software, it can get the horizontal counterforce of the inner climbing tower crane supporting system diagram which about the cross sectional area of strut and moment of inertia of beam.

Abstract: In this article we demonstrated the study results of durability quality of cement paste containing waste solar PV cells. The conclusions were made on effect of this cement replacement. The use of ground solar cells on the durability properties of cement-based composite was investigated. As a result, we identified the factors affecting the durability for those of cement mortar specimens which predefined and made in lab.

Abstract: In this article we demonstrated the study results of strength quality of cement paste blended with waste solar PV cells. The conclusions were made on effect of this cement replacement. The use of ground solar cells on the mechanical properties of cement-based composite was investigated, and as a result, we identified the factors affecting the strength for those of cement mortar specimens which predefined and made in lab.

Abstract: Insulation systems: an insulation shell of building creates terms for energy saving, reduction of carbon dioxide emissions, natural environment preservation. And it is pressing question of modern construction. The concepts of green building take into account ecology and social protection in processes of work planning and performance, including energy saving.

Abstract: This paper presents a series of centrifuge tests studying the performance of colloidal silica grouted soil layers during permanent lateral ground deformations due to earthquake induced lateral spreading. Two centrifuge tests were conducted to study liquefaction resistance of liquefiable soil deposits stabilized with colloidal silica, and then the results were compared with the tests conducted on similar soil deposits without any soil remediation. The testing results on remediated soils showed excellent resistance against the liquefaction and associated lateral and vertical ground deformations.