Abstract
Conventional materials are considered to be major contributors of Green House Gas (GHG) emissions. New cost effective technologies for housing is, therefore, a need of the hour. To make mass housing cost effective in shortest possible time, each of the housing components has to be optimized for cost and production time. Disposal of fly ash is posing a great threat for its disposal problem. There is a dire necessity for alternate materials replacing conventional costly material with cost effective and environmental friendly materials making them energy efficient. This paper presents the technology and advantages of construction of cost effective and energy efficient construction using the developed Carbon Neutral Soil-Cement Fly Ash (SCF) blocks. Construction methods adopted were Arch foundation, Rat-Trap bond using SCF blocks for masonry, precast SCF block Lintel elements and partially precast SCF Slab Panels for flooring/roofing. Overall Cost to the extent of 42% can be saved using this cost effective construction technology over the conventional method. Energy of the buildingcan be drastically brought down from. 36.39 GJ (4.2T of CO2) for conventional construction to 9.51 GJ (1.33T of CO2) for cost effective construction. Energy to the extent of 74% can be saved using this Technology.
Highlights
Housing shortage is the major problem faced by the developing countries
Development of soilcement-fly ash (SCF) blocks and all relevant building components using SCF blocks is an effective solution to meet the challenge of providing cost effective mass housing
There is significant increase in the ratio of wet to dry strength of SCF blocks and reduction in loss of their weight on wetting and drying test with increase in fly ash content, reflecting the improved durability of blocks. This may be attributed to addition of fly ash which fills in micro pores and proper grading of blended soil resulting in increased density followed by strength and durability[3,4]
Summary
Housing shortage is the major problem faced by the developing countries. Migration of rural people to urban areas has increased enormously and compelled them to live in unauthorized accommodation and slums. 38 million rural housing units are required for additional population during decade [1]. Development of soilcement-fly ash (SCF) blocks and all relevant building components using SCF blocks is an effective solution to meet the challenge of providing cost effective mass housing. Soil is the most abundant and cheaply available low enrgy material traditionally used for construction of houses. It is known fact, that traditional bricks are manufactured from the locally available suitable soil followed by baking (burning) to develop the desired strength. There is a need to overcome these environmental related challenges while meeting the demand for mass housing
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