Research On Economical Energy-saving Composite Block Used For Rural Architectures

With the comprehensive development of building energy conservation and the implementation of national policy for wall reform, concrete hollow blocks have been vigorously applied as a main alternative to clay bricks and achieved good economic benefits. However, the current research on building energy conservation has focused mainly on urban architecture and paid little attention on energy conservation using new hollow blocks in rural architecture, which does not include any energy conservation in its enclosure. Clay brick is still the main material used in rural architecture, leads to poor thermal performance and high energy consumption.With the spreading of building energy conservation from the cities to towns and villages, the economical energy-saving wall materials will have a broad market in towns and villages. According to the climatic characteristics in the hot-summer and cold-winter zones and in light of multi-storey masonry structure and the relative concentration of the rural buildings, this paper investigates the economical energy-saving composite block suitable for rural areas, and focuses on improving rural architecture insulation effect, the composition of basic materials, the design of structural optimization, as well as the physical and mechanical properties, heat-insulating performance and economic performance. The study proceeds with economy, practicality, coordination and standardization and combines with the development needs of rural construction to satisfy the principle of " building energy conservation and green buildings" and "protecting the quality of rural ecological living environment".1,To develop the"thermal-aided design software for civil buildings"and provide assistance for thermal design and calculation of the building envelope of various forms;2,To explore the influence of cement amount, the parameter of renewable lightweight aggregate from local aerated concrete wastes and water-cement ratio on concrete strength and bulk density, determine the concrete mix ratio of economical energy-saving composite block by test;3,To analyze the influence of hole structure and material composition type on the ther- -mal insulation sproperties of concrete block and optimize the structure, material and combination pattern of composite block by use of"thermal-aided design software for civil buildings",calculate thermal indexes of economical energy-saving composite block and wall, which meet the local energy sfficiency standards and the requirements of the subjcet, then determine the optimal scheme ;4,To study on the mechanical properties of the economical energy-saving composite block such as compressive strength, relative water content, softening coefficient etc., and to analyze failure characteristics of energy-saving composite block through the physical and mechanical test;5,To study on the thermal performance of materials, energy-saving composite block and wall, calculate the heat transfer coefficient of walls, and to analyze the thermal insulation effect of economical energy-saving composite block and walls through thermal test;6,To simulate the simplified three-dimensional model of economical energy-saving composite block and wall applying the thermal analysis module of ANSYS in approximate one-dimensional temperature field , and to analyze temperature distribution, temperature gradient and heat flow distribution of the modules, compare the simulated heat transfer coefficients of walls with tested ones and calculated ones by the developed software , verify the effectiveness of"thermal-aided design software for civil buildings";7,To evaluate the cost of production,economic payback periode and energy efficiency of economical energy-saving composite block.