Advanced Materials Research Vols. 884-885

Abstract: To the supporting method of bored cast-in-place piles on foundation pit support in soft soil deposits, using the finite element method and considering the interaction between pile group, respectively, bored piles with compound foundation and entitative beam element are numerically simulated in two ways; Compared two kinds of method to calculate the displacement effects of adjacent pipeline to the actual monitoring data, the results show that using entitative beam element are adopted to simulate the piles is more reasonable.

Abstract: Innovative and traditional solutions for roof coating and urban paving are under development in order to study their effect both as passive cooling strategies for buildings and as effective tools for urban heat island mitigation. This paper deals with the optic-energy in-lab and numerical analysis of three materials used for roof covering and urban paving in Italy. Bitumen covering, cool painting and natural gravel covering are taken into account. Solar reflectance measurements shows that gravel optimize this property by more than 20% with respect to the bitumen covering of classic streets paving. The three materials are also evaluated in terms of roof covering in commercial buildings with flat roofs. Dynamic simulation results demonstrated that innovative cool membranes are able to optimize building year-round energy efficiency by 19.3%. Nevertheless, natural gravel covering produce important energy saving (15.6%) with respect to bitumen roof membrane configuration.

Abstract: This study aimed to investigate physical performance of particleboards produced with waste from sawmills, containing different wood species, and two adhesives: urea-formaldehyde (UF) based resin and castor-oil (PU) based bi-component polyurethane resin. Panels were produced with nominal density 0.8gcm^-3; pressing temperature 110°C; pressing time 10 min; specific pressure 5 MPa. Water absorption (2 and 24h); thickness swelling (2 and 24h); density; and moisture content were investigated. Results confirmed that the produced panels presented compatible physical properties in comparison with other researches referred in literature, proving the feasibility of inputs employed. Panels produced PU showed better performance than those produced with UF.

Abstract: On the basis of soil physical properties of three different land use types at western Yunnan plateau, the soil moisture infiltration characteristics in these three land use types were studied with the advanced double-rings method. The results showed that there were differences on soil bulk density, soil porosity, initial soil water infiltration rate and stable soil water infiltration rate. The bulk density of dry land is higher than that of forest land and grass land, which results in the physical properties and structure of forest land soil are better than those of non-forest land. For the initial infiltration, its order from high to low is forest land, dry land and grass land. Among different stands, it is showed that from the average infiltration rate and steady infiltration rate, its order from high to low was forest land, grass land and dry land.

Abstract: Based on Winkler model and engineering example, the behavior of elastic long pile under horizontal load was analyzed in test status while pile top at free. The analysis results show that under same horizontal static load, the maximum of pile shaft bending moment in work status is higher than it in test status. Directly using the horizontal bearing capacity obtained by horizontal static load test in project design is unsafe and inapposite. The horizontal bearing capacity of pile in work status can be get based on the proportion coefficient of the horizontal resistance coefficient.

Abstract: Steel slag as the discharged residue during steelmaking process is a kind of industrial solid waste, accounting for about 15 to 20 percent of crude steel in production. Steel slag is mainly similar with cement clinker in mineral and chemical composition, and possesses potential hydration reaction activity. The properties of steel slag, the research progress of activation and volume stability were summarized in this paper. Several approaches of steel slag utilization in construction and building materials were introduced. The combined use of various activation methods and proper treatment will increase the volume of steel slag in autoclaved tailings bricks and aerated concrete block.

Abstract: Through a practical project - the remediation of the landscape and the environment in Jingmai Village ,which analyzes the problem of the application of old and new material in the remediation and design of traditional village. Under the social background of tourism promoting economy, transform the incongruous elements in traditional villages and intend to restore the landscape and the environment of traditional Dai national folk houses, so as to achieve the dual purposes of protection and development.

Abstract: This article aims to study the calculation for shear capacity of SRHC (Steel Reinforced High-Strength Concrete) members restrained with CFS (Carbon Fiber Sheet). Experimental study, theoretical analysis and calculation simulating are integrated in this article for the research of the shear failure characteristics and effect of various parameters on their behavior of SRHC members restrained with SFC on the basis of existed SRHC members tested results. The shear strength formula of steel reinforcement high-strength concrete short columns restrained with CFS is put forward, which based on the superposed strength method. This method on the basis of the load-deformation process of CFS is similar to hooping. The results indicate that the shear capacity of SRHC columns restrained with CFS is higher than SRHC columns. And, due to the axial compression ratio, shear span ratio and the amount of reinforcement influence the shear capacity of the FRP materials. So, these three kinds of factors are also the influencing factors of shear capacity of SRHC members restrained with CFS. The effect of the internal concrete restrained with CFS is good because of the function of CFS is equal to hooping and the strain of CFS is bigger than the strain of steel, so this simple calculation method is safe , which may be useful for further study and engineering design.

Abstract: Study on the permeability of three kinds of soil research, including in loess, calcareous-soil, lime and fly ash (two ash) of loess, cement-soil. Selects 10 groups of soil to determine the coefficient of permeability.The results show that: cement-soil of 3:7 can be used as impervious material than calcareous-soil of 3:7. Calcareous-soil of 3:7 can be used as seepage control material in short-term.Two-ash can not play this role; As the same time, we found that: The coefficient of permeability of all kinds of modified soil are increasing after 21 days.

Abstract: In this paper, though analyzing the relation of gyratory compaction volume parameters of asphalt mixture with a variety of gradation and contrasting with the Marshall test, there comes to a conclusion that the influence sensitivity of different content of mineral aggregate needle flake to size parameters is different. So it cant determine the relationship between Marshall Compaction and gyratory compaction though volume parameters simply.