Applied Mechanics and Materials Vols. 357-360

Abstract: This paper studied experimentally the impact mechanical properties of bamboo fiber and hybrid steel fiber reinforced concrete. Steel fiber is already used in construction widely, but it is expensive in cost. As a kind of green building material, bamboo fiber can be used in the infrastructures together with concrete to improve the concretes mechanical properties. In order to investigate the impact mechanical properties of concrete reinforced with bamboo fiber and steel fiber, a series of concrete specimens reinforced with bamboo fiber, steel fiber or both steel fiber and bamboo fiber are investigated with self-designed impact device. The impact resistance abilities are tested and compared.

Abstract: In this paper, through the test to determine the polystyrene granule as aggregate, the cement foaming slurry as cementitious material, with various additives for the performance adjustment material, optimum matching of polystyrene particles made of lightweight aggregate cellular concrete heat preservation material ratio, was the influence of raw materials on the performance and the thermal insulation of building production technology product form and key.

Abstract: This paper presents the results of an experimental study on the compressive strength, splitting tensile strength and modulus of elasticity characteristics of high performance concrete. These tests were carried out to evaluate the mechanical properties of HPC for up to 7 and 28 days. Mixtures were prepared with water to binder ratio of 0.40. Two mixtures were containing fly ash at 25%, silica fume at 5% cement replacement, respectively. Another mixture was contains blast furnace slag and fly ash at 25%. Three standard 100¥a200 cylinder specimens were prepared. HPC showed improvement in the compressive strength and splitting tensile strength when ordinary Portland cement was replaced with silica fume. Compare with specimens FA25 and BS25FA25, specimen SF5 showed much more modulus of elasticity. It shows that the use of the blast furnace slag of 25% and fly ash of 25% cement replacement has caused a small increase in compressive strength and splitting tensile strength and modulus of elasticity compared to the only use of fly ash of 25% at 28days. The results indicated that the use of blast furnace slag or silica fume provided the good performance compare to fly ash when the mechanical properties of the high performance concretes were taken into account.

Abstract: As the foundation and important part of green building development, green building materials application and development directly determine the success of green building development, and also have a significant influence to complete the target of energy saving and emission reduction and comprehensive utilization in the building materials industry in Hunan.Through the survey of Hunan Province building materials industry present situation and resources, combined with the national development policies,this article is put forward the measure to accelerate the Hunan province green building materials development, make clear the basis idea, development target and key on our province green building materials development,develop the grow planning of green building materials in Hunan.

Abstract: Building material is the base of civil engineering construction, in the history of thousands of years of development, building materials also gradually change and change, and is closely related to the progress of human civilization and the development of science and technology.Green building materials has the vital significance to the construction of a conservation-oriented society and sustainable development, in accordance with China's social development.This paper introduces the importance of the development of green building materials,analyzes some factors influencing the development of green building materials in China,and discusses the development tendency of green building materials in China.

Abstract: The spayed fiber reinforcement polymer concrete (FRPC) is a kind of new composite material and construction methods, combining good characteristics of the spayed concrete with FRPC. The spayed FRPC widely applied into civil engineering, water project, buildings, road and bridge, and repairing and strengthening various contractures, which obtained engineering success and economic benefit. Firstly, the physical and mechanical performance of sprayed FRPC is introduced. Secondly, applications on sprayed FRPC are summarized in engineering at home and abroad. At last, some advices for application and development of spayed FRPC technology in China are given.

Abstract: The spayed fiber reinforcement polymer concrete (FRPC) is a kind of new composite material and construction methods, combining good characteristics of the spayed concrete with FRPC. The research and application in China and overseas of the RFPC technology are briefly introduced. The study in China mainly focuses on the physical and mechanical performance and application style, both the theory and application of which are relatively mature. The spayed FRPC widely applied into civil engineering, water project, buildings, road and bridge, and repairing and strengthening various contractures, which obtained engineering success and economic benefit.

Abstract: An experimental program was performed to obtain the density, compressive strength, and thermal conductivity of palm-based lightweight concrete. Palm-based polyurethane (PU) particles were used as lightweight aggregates in creating concrete systems. Concrete systems contain palm kernel oil-based polyol (PKO-p) reacted with 2,4-methylene diphenyl diisocyanate (MDI). In this study, polymer concrete was improved to achieve the optimum level of PU with the lowest possible density. The PU particles in the concrete mixture comprised of 1% to 5% w/w with density of less than 1800 kg/m³. The PU particles were 5 mm in size. The ratio of PKO-p to MDI was set at 1:1 and the loading of the concrete mixture was set at 3% w/w to produce lightweight concrete. The resulting concrete has excellent compressive strength (17.5 MPa) and thermal conductivity (0.24 W/mK). Results show that the PU particle dosage has the most significant effect on the physical and mechanical properties of concrete.

Abstract: The buildings of the world expo exhibition witnessed the development of world expo, and architecture bearing the world expo display function at the same time is also showing the unique innovation structure. With the development of the Times, the building is no longer as usual the pursuit of simple large space limit, but from structural expression to decorative expression; The latest led technology of green environmental protection, low carbon ecological building materials will be more widely application and development.

Abstract: The hole shape design of perforated brick directly affects thermal insulation performance of wall. In order to study the influence of shape, size and configuration of perforated brick on the insulation performance, six kinds of perforated brick with different hole shape were designed, and their temperature field were simulated with finite element method. The results show that the insulation performance of perforated brick with square hole is the best. Filling brick holes with thermal insulation materials can improve the insulation performance of perforated brick, Besides; The thermal conductivity of perforated brick affects its thermal resistance, so brick materials with low thermal conductivity should be developed for the achievement of energy-saving standard of wall thermal resistance.