Terminology[ edit ] The term "sewage treatment plant" or "sewage treatment works" in some countries is nowadays often replaced with the term wastewater treatment plant or wastewater treatment station.
This gives the wall with an internal cavity bridged by the rowlock. This is the major reason where virgin materials like brick clay and cement can be considerably saved.
This adds this technology to the list of Green building technologies and sustainability for an appropriate option as against conventional solid brick wall masonry. This cavity adds an added advantage as it adds a Green building feature of help maintain improved thermal comfort and keep the interiors colder than outside and vice versa.
The Rat trap bond construction is a modular type of masonry construction. Due care must be taken while designing the wall lengths and heights for a structure. The openings and wall dimensions to be in multiples of the module. Also the course below sill and lintel to be a solid course by placing bricks on edge.
The masonry on the sides of the openings also to be solid as will help in fixing of the opening frame. These alternate bricks provide better strength and durability than fired clay bricks and finishing cost of your wall can be saved with a better quality and aesthetically soothing environment in the interiors.
Lime should be explored as a material for mortar as it is locally available in many parts of the country and helps reduce the consumption of cement.
Lime as a binding material along with fly ash can result in to make lime pozzolona mortar which saves on your cost of cement. It also adds another Green building feature, use of industrial waste i.
Rat trap bond wall is a cavity wall construction with added advantage of thermal comfort. The interiors remain cooler in summer and warmer in winters.
Rat-trap bond when kept exposed, create aesthetically pleasing wall surface and cost of plastering and painting also may be avoided. Rat trap bond can be used for load bearing as well as thick partition walls.
All works such as pillars, sill bands, window and tie beams can be concealed. The walls have approx. Virgin materials such as bricks, cement and steel can be considerably saved upon by adopting this technology. It will also help reduce the Embodied Energy of virgin materials and save the production of Green House Gases into the atmosphere.
In case for more structural safety, reinforcement bars can be inserted through the cavity till the foundation. Rat trap bond vs.
Summarising the material cost, an approximate saving of Rs. Assume building a house with sq m on each floor, and the periphery walls are made of Rat trap bond instead of conventional bond, the savings in materials cost and total brickwork cost that can be achieved are listed below: The table below shows the Embodied Energy savings arriving due to the material saving for a simple house as described in the chapter D.
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