Study of radon diffusion from RHA-modified ordinary Portland cement using SSNTD technique |
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| Institution: | 1. Department of Physics, RKSD College, Kaithal 136119, India;2. Department of Physics, National Institute of Technology, Kurukshetra 136119, India;3. Centre for R & D, Manav Rachana International University, Faridabad 121004, India;1. Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai, 400 085, India;2. Helmholtz Zentrum München (GmbH), former Institute of Radiation Protection, 85764 Neuherberg, Germany;3. Helmholtz Zentrum München (GmbH), Institute of Radiation Medicine, 85764 Neuherberg, Germany |
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| Abstract: | The diffusion coefficient of radon is a very important factor in estimating the rate of indoor radon inflow. The aim of this work is to develop and assess the potential of radon resistant construction materials in residential buildings. Of late, rice husk ash (RHA) has been used as a component in cement. The X-ray diffraction of RHA indicates that the RHA contains mainly amorphous materials while the X-ray fluorescence analysis shows that the major percentage of it is composed of silica. The amorphous silica present in the RHA is responsible for the pozzolonic activity of the ash. The results of the present study indicate that the RHA when mixed with cement initially reduces radon diffusion coefficient, followed by enhancement when the percentage of RHA is increased above 30% by weight. |
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