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Embodied Energy &Cost Issues of Tank-Bed-lime Based Geopolymer Adobes

Open Journal of Energy Efficiency 2017年第3期6卷 128-139页

作者： T. K. Jyothi B. N. Varsha S. Raghunath K. S. Jagadish Department of Civil Engineering Government Engineering College Ramanagara India BMS College of Engineering Bengaluru India Department of Civil Engineering BMS College of Engineering Bengaluru India Indian Institute of Science Bengaluru India

It is well-known that a product or a system is sustainable if it is economically viable, socially acceptable and environmentally friendly. Load bearing masonry is one such example which is quite sustainable, especially if the masonry units are locally available. It is important to quantify the environmental benefits and cost, if an alternative to an existing technology is to be suggested. Of course the issues related to acceptance have to be discussed and addressed. This paper presents the quantification of embodied energy and cost of lime-pozzolana-cement (LPC) geopolymer based masonry units made using locally available bulk ingredients viz. tank-bed soil (TBS) and brick-powder (BP). The masonry adobe units developed have achieved the target performance in terms of strength, low water absorption and relative ease of production. Simultaneously the issues related to cost are also discussed in this paper. The studies have revealed that the bulk contributor to embodied energy and cost of geopolymer adobes are the alkaline materials viz sodium hydroxide and sodium silicate. However, the embodied energy and cost per unit strength appears to be better than that of conventional table moulded bricks in south India, especially when alkaline solution at 2M concentration is used with LPC.

关键词： Geopolymer Bricks Embodied Energy lime-pozzolana Cement Cost

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